/* roulang page: index */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--ds-font-heading);
            font-weight: 700;
            line-height: 1.25;
            margin-top: 0;
            color: var(--ds-deep);
        }

        h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 26px;
            font-weight: 600;
            line-height: 1.35;
        }
        h4 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
        }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
            line-height: 1.8;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }
        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (min-width: 1400px) {
            .ds-nav .nav-container {
                max-width: 1280px;
            }
        }
        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }
        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }
        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }
        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }
        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }
        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }
        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border: 2px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            white-space: nowrap;
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
        }
        .ds-nav-cta:hover {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-deep);
        }
        .ds-nav-hamburger {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            padding: 8px;
            cursor: pointer;
            z-index: 1060;
        }
        .ds-nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--ds-deep);
            border-radius: 1px;
            transition: all var(--ds-transition-fast);
        }
        .ds-nav-hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .ds-nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .ds-nav-hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        @media (max-width: 991px) {
            .ds-nav-links {
                display: none;
            }
            .ds-nav-cta.desktop-only {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav-mobile {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--ds-deep);
                z-index: 1055;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 8px;
                opacity: 0;
                pointer-events: none;
                transition: opacity var(--ds-transition);
            }
            .ds-nav-mobile.open {
                opacity: 1;
                pointer-events: auto;
            }
            .ds-nav-mobile a {
                color: var(--ds-warm-bg);
                font-size: 22px;
                font-weight: 600;
                padding: 12px 24px;
                display: block;
                text-align: center;
                transition: color var(--ds-transition-fast);
            }
            .ds-nav-mobile a:hover {
                color: var(--ds-gold-light);
            }
            .ds-nav-mobile .mobile-cta {
                margin-top: 16px;
                padding: 14px 32px;
                font-size: 16px;
                font-weight: 700;
                color: var(--ds-deep);
                background: var(--ds-gold);
                border-radius: var(--ds-radius-sm);
                border: none;
            }
        }
        @media (min-width: 992px) {
            .ds-nav-mobile {
                display: none !important;
            }
        }

        /* ========== HERO ========== */
        .ds-hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--ds-deep);
            overflow: hidden;
            margin-top: -72px;
            padding-top: 72px;
        }
        .ds-hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        .ds-hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
            filter: brightness(0.5) saturate(0.8);
            animation: heroZoom 18s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.06);
            }
        }
        .ds-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 26, 26, 0.7) 0%, rgba(26, 26, 26, 0.85) 40%, rgba(26, 26, 26, 0.95) 100%);
            z-index: 1;
        }
        .ds-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .ds-hero-content {
            max-width: 680px;
            animation: heroFadeIn 0.8s ease-out;
        }
        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(12px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .ds-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(176, 141, 87, 0.2);
            border: 1px solid rgba(176, 141, 87, 0.4);
            color: var(--ds-gold-light);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            animation: heroFadeIn 0.8s ease-out 0.1s both;
        }
        .ds-hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ds-gold);
            animation: pulseDot 2s ease-in-out infinite;
        }
        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(176, 141, 87, 0.6);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(176, 141, 87, 0);
            }
        }
        .ds-hero h1 {
            color: #FFFFFF;
            font-size: 56px;
            font-weight: 800;
            line-height: 1.12;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
            animation: heroFadeIn 0.8s ease-out 0.2s both;
        }
        .ds-hero h1 .gold-accent {
            color: var(--ds-gold-light);
        }
        .ds-hero .hero-subtitle {
            color: rgba(255, 255, 255, 0.8);
            font-size: 18px;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 560px;
            animation: heroFadeIn 0.8s ease-out 0.3s both;
        }
        .ds-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            animation: heroFadeIn 0.8s ease-out 0.4s both;
        }
        .ds-hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            animation: heroFadeIn 0.8s ease-out 0.5s both;
        }
        .ds-hero-stat {
            text-align: left;
        }
        .ds-hero-stat .stat-num {
            font-family: var(--ds-font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--ds-gold-light);
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .ds-hero-stat .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
            letter-spacing: 0.03em;
        }

        @media (max-width: 767px) {
            .ds-hero {
                min-height: 78vh;
            }
            .ds-hero h1 {
                font-size: 36px;
                line-height: 1.18;
            }
            .ds-hero .hero-subtitle {
                font-size: 15px;
                line-height: 1.65;
            }
            .ds-hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .ds-hero-stat .stat-num {
                font-size: 32px;
            }
            .ds-hero-content {
                max-width: 100%;
            }
        }

        /* ========== BUTTONS ========== */
        .btn-ds-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border: 2px solid var(--ds-gold);
            border-radius: var(--ds-radius-sm);
            letter-spacing: 0.02em;
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
        }
        .btn-ds-primary:hover {
            background: var(--ds-gold-hover);
            border-color: var(--ds-gold-hover);
            color: var(--ds-deep);
            transform: translateY(-1px);
            box-shadow: var(--ds-shadow-md);
        }
        .btn-ds-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--ds-radius-sm);
            letter-spacing: 0.02em;
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
        }
        .btn-ds-outline:hover {
            border-color: #FFFFFF;
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-1px);
        }
        .btn-ds-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-deep);
            background: transparent;
            border: 2px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            letter-spacing: 0.02em;
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
        }
        .btn-ds-secondary:hover {
            background: var(--ds-deep);
            color: var(--ds-white);
            transform: translateY(-1px);
            box-shadow: var(--ds-shadow-sm);
        }
        .btn-ds-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            background: none;
            border: none;
            padding: 0;
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
        }
        .btn-ds-link:hover {
            color: var(--ds-gold-hover);
            gap: 10px;
        }
        .btn-ds-link .arrow {
            transition: transform var(--ds-transition-fast);
        }
        .btn-ds-link:hover .arrow {
            transform: translateX(3px);
        }

        /* ========== SECTIONS ========== */
        .ds-section {
            padding: var(--ds-section-gap) 0;
        }
        @media (max-width: 767px) {
            .ds-section {
                padding: var(--ds-section-gap-mobile) 0;
            }
        }
        .ds-section-deep {
            background: var(--ds-deep);
            color: #FFFFFF;
        }
        .ds-section-deep h2,
        .ds-section-deep h3,
        .ds-section-deep h4 {
            color: #FFFFFF;
        }
        .ds-section-deep p {
            color: rgba(255, 255, 255, 0.8);
        }
        .ds-section-warm {
            background: var(--ds-warm-bg2);
        }
        .ds-section-white {
            background: var(--ds-white);
        }
        .ds-section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .ds-section-title {
            margin-bottom: 14px;
        }
        .ds-section-desc {
            color: var(--ds-text-secondary);
            font-size: 16px;
            line-height: 1.7;
            max-width: 640px;
            margin-bottom: 32px;
        }

        /* ========== VALUE PROPS (卖点三连) ========== */
        .ds-value-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border-top: 1px solid var(--ds-border);
        }
        .ds-value-item {
            padding: 40px 36px;
            border-bottom: 1px solid var(--ds-border);
            border-right: 1px solid var(--ds-border);
            transition: all var(--ds-transition);
            position: relative;
        }
        .ds-value-item:nth-child(even) {
            border-right: none;
        }
        .ds-value-item:hover {
            background: var(--ds-warm-bg2);
        }
        .ds-value-num {
            font-family: var(--ds-font-number);
            font-size: 56px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 12px;
            letter-spacing: -0.03em;
        }
        .ds-value-item h4 {
            margin-bottom: 8px;
            font-size: 20px;
        }
        .ds-value-item p {
            color: var(--ds-text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 420px;
        }
        @media (max-width: 767px) {
            .ds-value-grid {
                grid-template-columns: 1fr;
            }
            .ds-value-item {
                border-right: none;
                padding: 28px 20px;
            }
            .ds-value-num {
                font-size: 42px;
            }
        }

        /* ========== BRAND INTRO ========== */
        .ds-brand-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .ds-brand-intro .brand-text p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--ds-text-secondary);
            margin-bottom: 16px;
        }
        .ds-brand-intro .brand-image {
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-lg);
        }
        .ds-brand-intro .brand-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--ds-radius-lg);
            transition: transform 0.6s ease;
        }
        .ds-brand-intro .brand-image:hover img {
            transform: scale(1.03);
        }
        @media (max-width: 991px) {
            .ds-brand-intro {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .ds-brand-intro .brand-image img {
                height: 280px;
            }
        }

        /* ========== SERVICE CARDS ========== */
        .ds-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .ds-service-card {
            background: var(--ds-white);
            border: 1px solid var(--ds-border);
            border-radius: var(--ds-radius-lg);
            padding: 32px 28px;
            transition: all var(--ds-transition);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        .ds-service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--ds-gold);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--ds-transition);
        }
        .ds-service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-gold-light);
        }
        .ds-service-card:hover::before {
            transform: scaleX(1);
        }
        .ds-service-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--ds-radius-sm);
            background: var(--ds-warm-bg3);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 20px;
            color: var(--ds-gold);
            transition: all var(--ds-transition);
        }
        .ds-service-card:hover .card-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }
        .ds-service-card h4 {
            margin-bottom: 8px;
            font-size: 18px;
        }
        .ds-service-card p {
            color: var(--ds-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .ds-service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 575px) {
            .ds-service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== SCENE DEMO ========== */
        .ds-scene-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            align-items: stretch;
            min-height: 420px;
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-md);
            margin-bottom: 32px;
        }
        .ds-scene-row .scene-img {
            overflow: hidden;
        }
        .ds-scene-row .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .ds-scene-row:hover .scene-img img {
            transform: scale(1.04);
        }
        .ds-scene-row .scene-text {
            padding: 48px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            background: var(--ds-white);
        }
        .ds-scene-row .scene-text h3 {
            margin-bottom: 12px;
        }
        .ds-scene-row .scene-text p {
            color: var(--ds-text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .ds-scene-row.reverse .scene-img {
            order: 2;
        }
        .ds-scene-row.reverse .scene-text {
            order: 1;
        }
        @media (max-width: 767px) {
            .ds-scene-row {
                grid-template-columns: 1fr;
                min-height: auto;
                border-radius: var(--ds-radius);
            }
            .ds-scene-row .scene-img {
                height: 260px;
                order: -1 !important;
            }
            .ds-scene-row .scene-text {
                padding: 28px 20px;
                order: 1 !important;
            }
            .ds-scene-row.reverse .scene-img {
                order: -1 !important;
            }
        }

        /* ========== DATA ANALYSIS ========== */
        .ds-kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .ds-kpi-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--ds-radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--ds-transition);
        }
        .ds-kpi-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(176, 141, 87, 0.4);
            transform: translateY(-3px);
        }
        .ds-kpi-card .kpi-num {
            font-family: var(--ds-font-number);
            font-size: 48px;
            font-weight: 700;
            color: var(--ds-gold-light);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .ds-kpi-card .kpi-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.03em;
        }
        .ds-kpi-card .kpi-trend {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: #4CAF50;
            margin-top: 6px;
            letter-spacing: 0.02em;
        }
        @media (max-width: 991px) {
            .ds-kpi-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 575px) {
            .ds-kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .ds-kpi-card {
                padding: 20px 14px;
            }
            .ds-kpi-card .kpi-num {
                font-size: 34px;
            }
        }

        /* ========== PROGRESS / TASK ========== */
        .ds-progress-list {
            list-style: none;
            padding: 0;
            margin: 0;
            position: relative;
        }
        .ds-progress-list::before {
            content: '';
            position: absolute;
            left: 23px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--ds-border);
            z-index: 0;
        }
        .ds-progress-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 16px 0;
            position: relative;
            z-index: 1;
        }
        .ds-progress-item .step-marker {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--ds-white);
            border: 2px solid var(--ds-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ds-font-number);
            font-weight: 700;
            font-size: 18px;
            flex-shrink: 0;
            color: var(--ds-text-secondary);
            transition: all var(--ds-transition);
            position: relative;
            z-index: 1;
        }
        .ds-progress-item.completed .step-marker {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-white);
        }
        .ds-progress-item .step-content h4 {
            margin-bottom: 4px;
            font-size: 17px;
        }
        .ds-progress-item .step-content p {
            color: var(--ds-text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 0;
        }
        .ds-progress-item .step-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            background: #E8F5E9;
            color: #2E7D32;
            letter-spacing: 0.03em;
            margin-left: 8px;
        }

        /* ========== LIVE PREVIEW ========== */
        .ds-live-card {
            background: var(--ds-white);
            border: 1px solid var(--ds-border);
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-md);
            display: grid;
            grid-template-columns: 1fr 1fr;
            transition: all var(--ds-transition);
        }
        .ds-live-card:hover {
            box-shadow: var(--ds-shadow-xl);
            transform: translateY(-2px);
        }
        .ds-live-card .live-img-wrap {
            position: relative;
            overflow: hidden;
        }
        .ds-live-card .live-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }
        .ds-live-card .live-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: #E53935;
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 14px;
            letter-spacing: 0.04em;
            animation: livePulse 1.8s ease-in-out infinite;
        }
        @keyframes livePulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.5);
            }
            50% {
                box-shadow: 0 0 0 14px rgba(229, 57, 53, 0);
            }
        }
        .ds-live-card .live-info {
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .ds-live-card .live-countdown {
            display: flex;
            gap: 10px;
            margin: 12px 0;
            flex-wrap: wrap;
        }
        .ds-live-card .countdown-block {
            background: var(--ds-warm-bg3);
            padding: 8px 14px;
            border-radius: var(--ds-radius-sm);
            text-align: center;
            min-width: 50px;
        }
        .ds-live-card .countdown-block .cd-num {
            font-family: var(--ds-font-number);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            line-height: 1;
        }
        .ds-live-card .countdown-block .cd-label {
            font-size: 10px;
            color: var(--ds-text-light);
            letter-spacing: 0.04em;
        }
        @media (max-width: 767px) {
            .ds-live-card {
                grid-template-columns: 1fr;
            }
            .ds-live-card .live-img-wrap img {
                min-height: 200px;
                max-height: 240px;
            }
            .ds-live-card .live-info {
                padding: 20px 16px;
            }
        }

        /* ========== TESTIMONIALS ========== */
        .ds-testimonial-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--ds-border) transparent;
        }
        .ds-testimonial-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .ds-testimonial-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .ds-testimonial-scroll::-webkit-scrollbar-thumb {
            background: var(--ds-border);
            border-radius: 2px;
        }
        .ds-testimonial-card {
            flex: 0 0 380px;
            scroll-snap-align: start;
            background: var(--ds-white);
            border: 1px solid var(--ds-border);
            border-radius: var(--ds-radius-lg);
            padding: 28px 24px;
            transition: all var(--ds-transition);
            min-width: 300px;
        }
        .ds-testimonial-card:hover {
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-gold-light);
            transform: translateY(-3px);
        }
        .ds-testimonial-card .t-quote {
            font-size: 15px;
            line-height: 1.75;
            color: var(--ds-text);
            margin-bottom: 16px;
            font-style: italic;
            position: relative;
            padding-left: 20px;
            border-left: 3px solid var(--ds-gold);
        }
        .ds-testimonial-card .t-author {
            font-weight: 600;
            font-size: 14px;
            color: var(--ds-deep);
        }
        .ds-testimonial-card .t-role {
            font-size: 12px;
            color: var(--ds-text-light);
            margin-top: 2px;
        }
        @media (max-width: 767px) {
            .ds-testimonial-card {
                flex: 0 0 85vw;
                min-width: 260px;
            }
        }

        /* ========== COUPON WALL ========== */
        .ds-coupon-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .ds-coupon-card {
            background: var(--ds-white);
            border: 2px dashed var(--ds-border);
            border-radius: var(--ds-radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--ds-transition);
            position: relative;
            overflow: hidden;
        }
        .ds-coupon-card:hover {
            border-color: var(--ds-gold);
            border-style: solid;
            box-shadow: var(--ds-shadow-lg);
            transform: translateY(-4px);
        }
        .ds-coupon-card .coupon-amount {
            font-family: var(--ds-font-number);
            font-size: 52px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 6px;
        }
        .ds-coupon-card .coupon-amount small {
            font-size: 22px;
        }
        .ds-coupon-card .coupon-title {
            font-weight: 600;
            font-size: 16px;
            margin-bottom: 6px;
            color: var(--ds-deep);
        }
        .ds-coupon-card .coupon-rule {
            font-size: 12px;
            color: var(--ds-text-light);
            margin-bottom: 14px;
            line-height: 1.5;
        }
        .ds-coupon-card .coupon-tag {
            position: absolute;
            top: 14px;
            right: -30px;
            background: var(--ds-gold);
            color: var(--ds-white);
            font-size: 11px;
            font-weight: 700;
            padding: 4px 36px;
            transform: rotate(45deg);
            letter-spacing: 0.04em;
        }
        @media (max-width: 991px) {
            .ds-coupon-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575px) {
            .ds-coupon-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== NEWS ========== */
        .ds-news-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ds-news-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 0;
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }
        .ds-news-item:hover {
            background: var(--ds-warm-bg2);
            padding-left: 12px;
            border-radius: var(--ds-radius-sm);
            margin: 0 -12px;
            padding-right: 12px;
        }
        .ds-news-date {
            flex-shrink: 0;
            font-family: var(--ds-font-number);
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
            min-width: 85px;
            padding-top: 2px;
            letter-spacing: 0.03em;
        }
        .ds-news-body h4 {
            font-size: 16px;
            margin-bottom: 4px;
            font-weight: 600;
            line-height: 1.4;
        }
        .ds-news-body p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
            margin-bottom: 6px;
        }
        @media (max-width: 575px) {
            .ds-news-item {
                flex-direction: column;
                gap: 6px;
                padding: 14px 0;
            }
            .ds-news-date {
                min-width: auto;
            }
        }

        /* ========== FIXED BOTTOM BAR ========== */
        .ds-fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(26, 26, 26, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
        }
        .ds-fixed-cta .cta-text {
            color: rgba(255, 255, 255, 0.9);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .ds-fixed-cta .btn-ds-primary {
            padding: 10px 24px;
            font-size: 14px;
        }
        @media (max-width: 575px) {
            .ds-fixed-cta {
                padding: 10px 14px;
                gap: 10px;
            }
            .ds-fixed-cta .cta-text {
                font-size: 13px;
            }
        }
        body {
            padding-bottom: 70px;
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
            font-size: 14px;
            line-height: 1.7;
        }
        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .ds-footer .footer-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.6;
            max-width: 280px;
        }
        .ds-footer h5 {
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }
        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ds-footer ul li {
            margin-bottom: 6px;
        }
        .ds-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            transition: color var(--ds-transition-fast);
        }
        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }
        .ds-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }
        @media (max-width: 767px) {
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }
        @media (max-width: 575px) {
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== UTILITY ========== */
        .text-gold {
            color: var(--ds-gold) !important;
        }
        .bg-deep {
            background: var(--ds-deep);
        }
        .bg-warm {
            background: var(--ds-warm-bg);
        }
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .mt-0 {
            margin-top: 0 !important;
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--ds-gold);
            outline-offset: 2px;
        }
        .btn-ds-primary:focus-visible,
        .btn-ds-outline:focus-visible,
        .btn-ds-secondary:focus-visible {
            outline: 2px solid var(--ds-gold);
            outline-offset: 3px;
        }

        /* Override Bootstrap defaults */
        .btn {
            border-radius: var(--ds-radius-sm);
            font-family: var(--ds-font-body);
        }
        a {
            color: inherit;
        }
        a:hover {
            color: var(--ds-gold);
        }

/* roulang page: category3 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: none;
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: translateY(-1px);
            box-shadow: var(--ds-shadow-md);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--ds-deep);
            border-radius: 2px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .ds-mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--ds-deep);
            z-index: 1055;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 24px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--ds-transition);
        }

        .ds-mobile-menu.open {
            display: flex;
            opacity: 1;
            pointer-events: auto;
        }

        .ds-mobile-menu a {
            font-size: 22px;
            font-weight: 600;
            color: var(--ds-warm-bg);
            padding: 12px 24px;
            transition: color var(--ds-transition-fast);
        }

        .ds-mobile-menu a:hover {
            color: var(--ds-gold-light);
        }

        .ds-mobile-menu .ds-nav-cta {
            margin-top: 16px;
            font-size: 16px;
            padding: 14px 32px;
            background: var(--ds-gold);
            color: var(--ds-deep);
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            padding: 20px 0 0;
            background: transparent;
            margin-bottom: 0;
        }

        .ds-breadcrumb .breadcrumb {
            margin: 0;
            padding: 0;
            list-style: none;
            display: flex;
            gap: 8px;
            font-size: 14px;
            color: var(--ds-text-light);
            flex-wrap: wrap;
        }

        .ds-breadcrumb .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ds-breadcrumb .breadcrumb li+li::before {
            content: '/';
            color: var(--ds-text-light);
            margin-right: 8px;
            display: inline-block;
        }

        .ds-breadcrumb .breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb .breadcrumb a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .breadcrumb .active {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== PAGE BANNER ========== */
        .ds-page-banner {
            position: relative;
            background: var(--ds-deep);
            min-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
            margin-bottom: 0;
        }

        .ds-page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .ds-page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.85) 0%, rgba(26, 26, 26, 0.5) 100%);
            z-index: 1;
        }

        .ds-page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
        }

        .ds-page-banner .banner-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold-light);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 16px;
            padding: 6px 16px;
            border: 1px solid rgba(176, 141, 87, 0.4);
            border-radius: 20px;
            background: rgba(176, 141, 87, 0.08);
        }

        .ds-page-banner h1 {
            font-family: var(--ds-font-heading);
            font-size: 52px;
            font-weight: 800;
            color: var(--ds-white);
            line-height: 1.15;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .ds-page-banner .banner-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            line-height: 1.6;
        }

        /* ========== SECTION COMMON ========== */
        .ds-section {
            padding: var(--ds-section-gap) 0;
        }

        .ds-section-sm {
            padding: 48px 0;
        }

        .ds-section-dark {
            background: var(--ds-deep);
            color: var(--ds-warm-bg);
        }

        .ds-section-warm {
            background: var(--ds-warm-bg2);
        }

        .ds-section-white {
            background: var(--ds-white);
        }

        .ds-section-title {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 12px;
            line-height: 1.25;
            letter-spacing: 0.01em;
        }

        .ds-section-dark .ds-section-title {
            color: var(--ds-white);
        }

        .ds-section-subtitle {
            font-size: 16px;
            color: var(--ds-text-secondary);
            max-width: 680px;
            line-height: 1.6;
            margin-bottom: 0;
        }

        .ds-section-dark .ds-section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .ds-section-header {
            margin-bottom: 40px;
        }

        /* ========== ASYMMETRIC GRID CARDS ========== */
        .ds-asymmetric-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }

        .ds-asymmetric-grid .grid-item {
            background: var(--ds-white);
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius-lg);
            padding: 32px 28px;
            transition: all var(--ds-transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .ds-asymmetric-grid .grid-item:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-lg);
            transform: translateY(-3px);
        }

        .ds-asymmetric-grid .grid-item.grid-span-5 {
            grid-column: span 5;
        }

        .ds-asymmetric-grid .grid-item.grid-span-7 {
            grid-column: span 7;
        }

        .ds-asymmetric-grid .grid-item.grid-span-4 {
            grid-column: span 4;
        }

        .ds-asymmetric-grid .grid-item.grid-span-8 {
            grid-column: span 8;
        }

        .ds-asymmetric-grid .grid-item.grid-span-6 {
            grid-column: span 6;
        }

        .ds-asymmetric-grid .grid-item.grid-span-3 {
            grid-column: span 3;
        }

        .ds-asymmetric-grid .grid-item.grid-span-9 {
            grid-column: span 9;
        }

        .ds-asymmetric-grid .grid-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--ds-warm-bg3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--ds-gold);
            margin-bottom: 16px;
            flex-shrink: 0;
            transition: all var(--ds-transition-fast);
        }

        .ds-asymmetric-grid .grid-item:hover .grid-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-asymmetric-grid .grid-item h3 {
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .ds-asymmetric-grid .grid-item p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            flex-grow: 1;
        }

        .ds-asymmetric-grid .grid-item .grid-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--ds-gold);
            background: rgba(176, 141, 87, 0.08);
            padding: 4px 12px;
            border-radius: 20px;
            margin-top: 16px;
            align-self: flex-start;
        }

        .ds-asymmetric-grid .grid-item.grid-featured {
            background: var(--ds-deep);
            border-color: var(--ds-deep);
            color: var(--ds-warm-bg);
        }

        .ds-asymmetric-grid .grid-item.grid-featured h3 {
            color: var(--ds-white);
        }

        .ds-asymmetric-grid .grid-item.grid-featured p {
            color: rgba(255, 255, 255, 0.75);
        }

        .ds-asymmetric-grid .grid-item.grid-featured .grid-icon {
            background: rgba(176, 141, 87, 0.2);
            color: var(--ds-gold-light);
        }

        .ds-asymmetric-grid .grid-item.grid-featured .grid-tag {
            color: var(--ds-gold-light);
            background: rgba(176, 141, 87, 0.15);
        }

        .ds-asymmetric-grid .grid-item.grid-featured:hover {
            border-color: var(--ds-gold);
            box-shadow: var(--ds-shadow-xl);
        }

        /* ========== DEEP CONTENT ========== */
        .ds-deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .ds-deep-content.reverse {
            direction: ltr;
        }

        .ds-deep-content.reverse .deep-text {
            order: 2;
        }

        .ds-deep-content.reverse .deep-image {
            order: 1;
        }

        .ds-deep-content .deep-text h3 {
            font-family: var(--ds-font-heading);
            font-size: 28px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .ds-section-dark .ds-deep-content .deep-text h3 {
            color: var(--ds-white);
        }

        .ds-deep-content .deep-text p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .ds-section-dark .ds-deep-content .deep-text p {
            color: rgba(255, 255, 255, 0.7);
        }

        .ds-deep-content .deep-image img {
            border-radius: var(--ds-radius-lg);
            width: 100%;
            height: auto;
            object-fit: cover;
            box-shadow: var(--ds-shadow-lg);
        }

        .ds-deep-content .deep-image {
            position: relative;
        }

        .ds-deep-content .deep-image::after {
            content: '';
            position: absolute;
            inset: 12px -12px -12px 12px;
            border: 2px solid var(--ds-gold-light);
            border-radius: var(--ds-radius-lg);
            z-index: -1;
            opacity: 0.5;
            pointer-events: none;
        }

        /* ========== PROCESS STEPS ========== */
        .ds-process-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
        }

        .ds-process-list::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--ds-border);
            z-index: 0;
        }

        .ds-process-item {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            position: relative;
            z-index: 1;
            padding: 20px 0;
        }

        .ds-process-item .process-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--ds-white);
            border: 2px solid var(--ds-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ds-font-number);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-gold);
            flex-shrink: 0;
            transition: all var(--ds-transition-fast);
        }

        .ds-process-item:hover .process-number {
            background: var(--ds-gold);
            color: var(--ds-white);
            box-shadow: var(--ds-shadow-md);
        }

        .ds-process-item .process-body h4 {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 6px;
        }

        .ds-process-item .process-body p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ========== STATS ROW ========== */
        .ds-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .ds-stat-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
        }

        .ds-stat-card:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-2px);
        }

        .ds-stat-card .stat-number {
            font-family: var(--ds-font-number);
            font-size: 44px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 8px;
        }

        .ds-stat-card .stat-label {
            font-size: 14px;
            color: var(--ds-text-secondary);
            font-weight: 500;
            line-height: 1.4;
        }

        .ds-section-dark .ds-stat-card {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.1);
        }

        .ds-section-dark .ds-stat-card .stat-label {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ========== CASE CARDS ========== */
        .ds-case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .ds-case-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            display: flex;
            flex-direction: column;
        }

        .ds-case-card:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-lg);
            transform: translateY(-3px);
        }

        .ds-case-card .case-img {
            height: 200px;
            overflow: hidden;
        }

        .ds-case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease-out;
        }

        .ds-case-card:hover .case-img img {
            transform: scale(1.04);
        }

        .ds-case-card .case-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .ds-case-card .case-body h4 {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
        }

        .ds-case-card .case-body p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 12px;
        }

        .ds-case-card .case-meta {
            font-size: 12px;
            color: var(--ds-text-light);
            display: flex;
            gap: 16px;
            align-items: center;
        }

        /* ========== FAQ ========== */
        .ds-faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ds-faq-item {
            background: var(--ds-white);
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            overflow: hidden;
            transition: all var(--ds-transition-fast);
        }

        .ds-faq-item:hover {
            border-color: var(--ds-gold-light);
        }

        .ds-faq-item .faq-question {
            padding: 18px 24px;
            font-family: var(--ds-font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            user-select: none;
            transition: color var(--ds-transition-fast);
        }

        .ds-faq-item .faq-question:hover {
            color: var(--ds-gold);
        }

        .ds-faq-item .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--ds-warm-bg3);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--ds-transition-fast);
            font-size: 14px;
            color: var(--ds-gold);
        }

        .ds-faq-item.open .faq-question .faq-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: rotate(45deg);
        }

        .ds-faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.75;
            display: none;
        }

        .ds-faq-item.open .faq-answer {
            display: block;
        }

        /* ========== CTA SECTION ========== */
        .ds-cta-section {
            background: var(--ds-deep);
            padding: 60px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .ds-cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(176, 141, 87, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .ds-cta-section h2 {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .ds-cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
            line-height: 1.6;
        }

        .ds-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--ds-radius-sm);
            border: none;
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            white-space: nowrap;
            position: relative;
            z-index: 1;
        }

        .ds-btn-primary {
            background: var(--ds-gold);
            color: var(--ds-deep);
        }

        .ds-btn-primary:hover {
            background: var(--ds-gold-hover);
            color: var(--ds-deep);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-lg);
        }

        .ds-btn-outline {
            background: transparent;
            color: var(--ds-white);
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }

        .ds-btn-outline:hover {
            border-color: var(--ds-gold-light);
            color: var(--ds-gold-light);
            background: rgba(176, 141, 87, 0.08);
            transform: translateY(-2px);
        }

        .ds-btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .ds-btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-gold);
            background: none;
            border: none;
            padding: 0;
            transition: all var(--ds-transition-fast);
        }

        .ds-btn-text:hover {
            color: var(--ds-gold-hover);
            gap: 10px;
        }

        .ds-btn-text .arrow {
            transition: transform var(--ds-transition-fast);
        }

        .ds-btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* ========== RELATED SECTION ========== */
        .ds-related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .ds-related-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            padding: 24px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            text-align: center;
        }

        .ds-related-card:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-2px);
        }

        .ds-related-card h4 {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
        }

        .ds-related-card p {
            font-size: 13px;
            color: var(--ds-text-secondary);
            line-height: 1.5;
            margin-bottom: 12px;
        }

        /* ========== BACK TO HOME ========== */
        .ds-back-home {
            text-align: center;
            padding: 40px 0;
            background: var(--ds-warm-bg);
        }

        .ds-back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
        }

        .ds-back-home a:hover {
            color: var(--ds-gold-hover);
            gap: 12px;
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: var(--ds-warm-bg);
            padding: 56px 0 32px;
            font-size: 14px;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
        }

        .ds-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            font-size: 14px;
            margin-bottom: 0;
        }

        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 10px;
        }

        .ds-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom span {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .ds-asymmetric-grid {
                grid-template-columns: repeat(6, 1fr);
                gap: 16px;
            }
            .ds-asymmetric-grid .grid-item.grid-span-5,
            .ds-asymmetric-grid .grid-item.grid-span-7,
            .ds-asymmetric-grid .grid-item.grid-span-8,
            .ds-asymmetric-grid .grid-item.grid-span-9 {
                grid-column: span 6;
            }
            .ds-asymmetric-grid .grid-item.grid-span-4 {
                grid-column: span 3;
            }
            .ds-asymmetric-grid .grid-item.grid-span-3 {
                grid-column: span 3;
            }
            .ds-asymmetric-grid .grid-item.grid-span-6 {
                grid-column: span 6;
            }
            .ds-stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 991px) {
            .ds-nav-links {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav .desktop-only {
                display: none;
            }
            .ds-page-banner h1 {
                font-size: 38px;
            }
            .ds-page-banner {
                min-height: 260px;
            }
            .ds-deep-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .ds-deep-content.reverse .deep-text {
                order: 1;
            }
            .ds-deep-content.reverse .deep-image {
                order: 2;
            }
            .ds-deep-content .deep-image::after {
                display: none;
            }
            .ds-case-grid {
                grid-template-columns: 1fr;
            }
            .ds-related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ds-asymmetric-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .ds-asymmetric-grid .grid-item.grid-span-5,
            .ds-asymmetric-grid .grid-item.grid-span-7,
            .ds-asymmetric-grid .grid-item.grid-span-8,
            .ds-asymmetric-grid .grid-item.grid-span-9,
            .ds-asymmetric-grid .grid-item.grid-span-4,
            .ds-asymmetric-grid .grid-item.grid-span-3,
            .ds-asymmetric-grid .grid-item.grid-span-6 {
                grid-column: span 1;
            }
            .ds-section {
                padding: var(--ds-section-gap-mobile) 0;
            }
            .ds-section-title {
                font-size: 28px;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav.scrolled {
                height: 52px;
            }
            .ds-nav-logo {
                font-size: 18px;
            }
            .ds-nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .ds-page-banner h1 {
                font-size: 30px;
            }
            .ds-page-banner .banner-subtitle {
                font-size: 15px;
            }
            .ds-page-banner {
                min-height: 220px;
            }
            .ds-page-banner .banner-content {
                padding: 40px 0;
            }
            .ds-section-title {
                font-size: 24px;
            }
            .ds-stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .ds-stat-card .stat-number {
                font-size: 32px;
            }
            .ds-related-grid {
                grid-template-columns: 1fr;
            }
            .ds-cta-section h2 {
                font-size: 26px;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .ds-footer {
                padding: 40px 0 24px;
            }
            .ds-process-list::before {
                left: 22px;
            }
            .ds-process-item .process-number {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
            .ds-process-item {
                gap: 16px;
            }
            .ds-case-card .case-img {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .ds-page-banner h1 {
                font-size: 26px;
            }
            .ds-stats-row {
                grid-template-columns: 1fr;
            }
            .ds-breadcrumb .breadcrumb {
                font-size: 12px;
            }
            .ds-btn {
                padding: 12px 24px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: none;
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--ds-deep);
            border-radius: 1px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--ds-text-light);
            background: transparent;
            margin: 0;
        }

        .ds-breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .separator {
            margin: 0 8px;
            color: var(--ds-text-light);
        }

        .ds-breadcrumb .current {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== HERO SECTION ========== */
        .category-hero {
            background: var(--ds-deep);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 80px 0 90px;
            color: var(--ds-white);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.88) 0%, rgba(26, 26, 26, 0.72) 100%);
            z-index: 1;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .category-hero h1 {
            font-family: var(--ds-font-heading);
            font-size: 52px;
            font-weight: 800;
            line-height: 1.18;
            color: var(--ds-white);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .category-hero h1 .highlight {
            color: var(--ds-gold-light);
        }

        .category-hero .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .category-hero .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary-gold {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold-light);
            border: none;
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-primary-gold:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-md);
        }

        .btn-outline-light-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-outline-light-custom:hover {
            border-color: var(--ds-gold-light);
            color: var(--ds-gold-light);
            background: rgba(255, 255, 255, 0.04);
        }

        /* ========== SECTION TITLES ========== */
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--ds-gold);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-title {
            font-family: var(--ds-font-heading);
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--ds-deep);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.75;
            max-width: 680px;
        }

        /* ========== INTRO SECTION ========== */
        .intro-section {
            padding: 60px 0 50px;
            background: var(--ds-white);
        }

        .intro-section .intro-text {
            font-size: 16px;
            line-height: 1.85;
            color: var(--ds-text-secondary);
            max-width: 860px;
        }

        .intro-section .intro-highlight-box {
            background: var(--ds-warm-bg2);
            border-left: 3px solid var(--ds-gold);
            padding: 20px 24px;
            border-radius: 0 var(--ds-radius-sm) var(--ds-radius-sm) 0;
            margin-top: 24px;
            font-size: 15px;
            color: var(--ds-text);
            line-height: 1.75;
        }

        /* ========== DOMAINS SECTION ========== */
        .domains-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-warm-bg);
        }

        .domains-grid {
            display: grid;
            grid-template-columns: 1.3fr 1fr;
            grid-template-rows: auto auto;
            gap: 24px;
            margin-top: 40px;
        }

        .domain-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            position: relative;
            overflow: hidden;
        }

        .domain-card:hover {
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-border);
            transform: translateY(-3px);
        }

        .domain-card.featured {
            grid-row: span 2;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            background: var(--ds-deep);
            color: var(--ds-white);
            border-color: var(--ds-deep2);
        }

        .domain-card.featured .domain-number {
            color: var(--ds-gold-light);
        }

        .domain-card.featured .domain-title {
            color: var(--ds-white);
        }

        .domain-card.featured .domain-desc {
            color: rgba(255, 255, 255, 0.8);
        }

        .domain-card.featured .domain-image {
            margin-top: 20px;
            border-radius: var(--ds-radius);
            overflow: hidden;
            aspect-ratio: 16/10;
        }

        .domain-card.featured .domain-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .domain-number {
            font-family: var(--ds-font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 12px;
        }

        .domain-title {
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 10px;
        }

        .domain-desc {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .domain-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
        }

        .domain-link:hover {
            color: var(--ds-gold-hover);
            gap: 10px;
        }

        .domain-link i {
            font-size: 12px;
            transition: transform var(--ds-transition-fast);
        }

        .domain-link:hover i {
            transform: translateX(3px);
        }

        /* ========== PROCESS SECTION ========== */
        .process-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-white);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 44px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 60px;
            right: 60px;
            height: 1px;
            background: var(--ds-border);
            z-index: 0;
            display: none;
        }

        @media (min-width: 992px) {
            .process-steps::before {
                display: block;
            }
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-number-circle {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--ds-warm-bg2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-family: var(--ds-font-number);
            font-size: 26px;
            font-weight: 700;
            color: var(--ds-gold);
            border: 2px solid var(--ds-border-light);
            transition: all var(--ds-transition);
        }

        .process-step:hover .step-number-circle {
            background: var(--ds-deep);
            color: var(--ds-gold-light);
            border-color: var(--ds-deep);
            box-shadow: var(--ds-shadow-md);
            transform: scale(1.05);
        }

        .step-title {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.65;
        }

        /* ========== INSIGHT SECTIONS ========== */
        .insight-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-warm-bg);
        }

        .insight-section.alt {
            background: var(--ds-white);
        }

        .insight-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .insight-row.reverse .insight-image-col {
            order: -1;
        }

        .insight-image-col {
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            aspect-ratio: 4/3;
            box-shadow: var(--ds-shadow-lg);
        }

        .insight-image-col img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease-out;
        }

        .insight-image-col:hover img {
            transform: scale(1.03);
        }

        .insight-text-col h3 {
            font-family: var(--ds-font-heading);
            font-size: 30px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 18px;
            line-height: 1.3;
        }

        .insight-text-col p {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .insight-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }

        .insight-list li {
            padding: 10px 0 10px 28px;
            position: relative;
            font-size: 15px;
            color: var(--ds-text);
            line-height: 1.7;
            border-bottom: 1px solid var(--ds-border-light);
        }

        .insight-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 18px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ds-gold);
            transform: translateY(-50%);
        }

        /* ========== METRICS SECTION ========== */
        .metrics-section {
            padding: 70px 0;
            background: var(--ds-deep);
            color: var(--ds-white);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .metric-item .metric-value {
            font-family: var(--ds-font-number);
            font-size: 48px;
            font-weight: 700;
            color: var(--ds-gold-light);
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-item .metric-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        .metric-item .metric-suffix {
            font-size: 20px;
            font-weight: 600;
            color: var(--ds-gold-light);
        }

        /* ========== CASES SECTION ========== */
        .cases-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-white);
        }

        .cases-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin-top: 36px;
            border-top: 1px solid var(--ds-border);
        }

        .case-item {
            display: grid;
            grid-template-columns: 100px 1fr auto;
            gap: 24px;
            align-items: center;
            padding: 22px 0;
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            cursor: default;
        }

        .case-item:hover {
            background: var(--ds-warm-bg2);
            padding-left: 16px;
            padding-right: 16px;
            margin: 0 -16px;
            border-radius: var(--ds-radius-sm);
        }

        .case-year {
            font-family: var(--ds-font-number);
            font-size: 28px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
        }

        .case-info h4 {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 6px;
        }

        .case-info p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .case-badge {
            display: inline-block;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--ds-gold);
            background: var(--ds-warm-bg2);
            border-radius: 20px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        /* ========== FAQ SECTION ========== */
        .faq-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-warm-bg);
        }

        .faq-accordion {
            margin-top: 36px;
            max-width: 860px;
        }

        .faq-item {
            background: var(--ds-white);
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--ds-transition-fast);
        }

        .faq-item:hover {
            border-color: var(--ds-border);
        }

        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: none;
            border: none;
            font-family: var(--ds-font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            text-align: left;
            cursor: pointer;
            transition: all var(--ds-transition-fast);
            gap: 16px;
        }

        .faq-item .faq-question:hover {
            color: var(--ds-gold);
        }

        .faq-item .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--ds-warm-bg2);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--ds-transition-fast);
            font-size: 12px;
            color: var(--ds-text-secondary);
        }

        .faq-item.open .faq-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, padding 0.35s ease-out;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .faq-item .faq-answer p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 70px 0;
            background: var(--ds-deep);
            color: var(--ds-white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(176, 141, 87, 0.08);
            pointer-events: none;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--ds-white);
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .cta-section .btn-primary-gold {
            font-size: 16px;
            padding: 15px 36px;
        }

        /* ========== RELATED SECTION ========== */
        .related-section {
            padding: var(--ds-section-gap) 0;
            background: var(--ds-white);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .related-card {
            background: var(--ds-warm-bg2);
            border-radius: var(--ds-radius);
            padding: 24px 22px;
            border: 1px solid transparent;
            transition: all var(--ds-transition);
            cursor: pointer;
        }

        .related-card:hover {
            border-color: var(--ds-border);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-2px);
            background: var(--ds-white);
        }

        .related-card h4 {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
        }

        .related-card p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .related-card .related-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 12px;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
        }

        .related-card .related-link:hover {
            color: var(--ds-gold-hover);
        }

        /* ========== BACK HOME ========== */
        .back-home-section {
            padding: 30px 0 50px;
            background: var(--ds-white);
            text-align: center;
        }

        .back-home-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
        }

        .back-home-link:hover {
            color: var(--ds-gold-hover);
            gap: 12px;
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            font-size: 14px;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
        }

        .ds-footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }

        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            margin-bottom: 14px;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 8px;
        }

        .ds-footer ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        /* ========== MOBILE NAV OVERLAY ========== */
        .ds-mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1045;
            background: var(--ds-deep);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
        }

        .ds-mobile-overlay.open {
            display: flex;
        }

        .ds-mobile-overlay a {
            color: var(--ds-white);
            font-size: 22px;
            font-weight: 600;
            transition: color var(--ds-transition-fast);
        }

        .ds-mobile-overlay a:hover,
        .ds-mobile-overlay a.active {
            color: var(--ds-gold-light);
        }

        .ds-mobile-overlay .mobile-cta {
            margin-top: 16px;
            padding: 12px 32px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold-light);
            border-radius: var(--ds-radius-sm);
            border: none;
            transition: all var(--ds-transition-fast);
        }

        .ds-mobile-overlay .mobile-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .ds-nav-links li a {
                padding: 8px 10px;
                font-size: 14px;
            }
            .category-hero h1 {
                font-size: 42px;
            }
            .section-title {
                font-size: 32px;
            }
            .domains-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .domain-card.featured {
                grid-row: span 1;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .case-item {
                grid-template-columns: 70px 1fr auto;
                gap: 16px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 991px) {
            .ds-nav-links {
                display: none;
            }
            .ds-nav-cta.desktop-only {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .category-hero {
                padding: 50px 0 60px;
            }
            .category-hero h1 {
                font-size: 36px;
            }
            .section-title {
                font-size: 28px;
            }
            .insight-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .insight-row.reverse .insight-image-col {
                order: 0;
            }
            .insight-image-col {
                aspect-ratio: 16/9;
            }
            .domains-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 18px 0;
            }
            .case-item:hover {
                padding-left: 12px;
                padding-right: 12px;
                margin: 0 -12px;
            }
            .case-year {
                font-size: 22px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
            .category-hero .hero-cta-group {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav.scrolled {
                height: 52px;
            }
            .ds-nav-logo {
                font-size: 18px;
                gap: 8px;
            }
            .ds-nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .category-hero {
                padding: 36px 0 44px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero .hero-subtitle {
                font-size: 15px;
            }
            .section-title {
                font-size: 25px;
            }
            .section-desc {
                font-size: 15px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .metric-item .metric-value {
                font-size: 36px;
            }
            .domains-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .domain-card {
                padding: 22px 18px;
            }
            .domain-number {
                font-size: 32px;
            }
            .domain-title {
                font-size: 19px;
            }
            .insight-text-col h3 {
                font-size: 24px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .faq-item .faq-question {
                font-size: 15px;
                padding: 15px 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .category-hero .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary-gold,
            .btn-outline-light-custom {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 14px;
            }
            .ds-breadcrumb {
                font-size: 13px;
            }
            .case-item {
                grid-template-columns: 1fr;
                gap: 6px;
            }
            .case-badge {
                align-self: flex-start;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 26px;
            }
            .section-title {
                font-size: 22px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .metric-item .metric-value {
                font-size: 32px;
            }
            .ds-footer {
                padding: 36px 0 20px;
            }
            .ds-footer .footer-brand {
                font-size: 18px;
            }
            .domain-card.featured .domain-image {
                aspect-ratio: 16/11;
            }
        }

/* roulang page: category1 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: none;
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-deep);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--ds-deep);
            border-radius: 1px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--ds-text-light);
            background: transparent;
            margin: 0;
        }

        .ds-breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .separator {
            margin: 0 8px;
            color: var(--ds-text-light);
        }

        .ds-breadcrumb .current {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== HERO - 众筹预热风格 ========== */
        .hero-trade {
            padding: 60px 0 80px;
            background: var(--ds-white);
            position: relative;
            overflow: hidden;
        }

        .hero-trade::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(176, 141, 87, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-trade-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-trade-left {
            position: relative;
        }

        .hero-trade-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--ds-warm-bg2);
            color: var(--ds-gold);
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .hero-trade-left h1 {
            font-family: var(--ds-font-heading);
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            color: var(--ds-deep);
            margin: 0 0 16px;
            letter-spacing: -0.01em;
            animation: fadeUpIn 0.6s ease-out;
        }

        .hero-trade-left h1 .gold-accent {
            color: var(--ds-gold);
        }

        .hero-trade-left .hero-subtitle {
            font-size: 17px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin: 0 0 28px;
            max-width: 480px;
        }

        .hero-trade-cta-group {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary-ds {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border: none;
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-primary-ds:hover {
            background: var(--ds-gold);
            color: var(--ds-deep);
            transform: translateY(-1px);
            box-shadow: var(--ds-shadow-md);
        }

        .btn-outline-ds {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-deep);
            background: transparent;
            border: 1.5px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-outline-ds:hover {
            background: var(--ds-warm-bg2);
            border-color: var(--ds-gold);
            color: var(--ds-gold);
            transform: translateY(-1px);
        }

        .hero-trade-right {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 28px;
        }

        .progress-ring-wrap {
            position: relative;
            width: 220px;
            height: 220px;
            flex-shrink: 0;
        }

        .progress-ring-wrap svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }

        .progress-ring-bg {
            fill: none;
            stroke: var(--ds-border-light);
            stroke-width: 10;
        }

        .progress-ring-fill {
            fill: none;
            stroke: var(--ds-gold);
            stroke-width: 10;
            stroke-linecap: round;
            transition: stroke-dashoffset 1.2s ease-out;
        }

        .progress-ring-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }

        .progress-ring-center .progress-value {
            font-family: var(--ds-font-number);
            font-size: 48px;
            font-weight: 700;
            color: var(--ds-deep);
            line-height: 1;
        }

        .progress-ring-center .progress-label {
            font-size: 13px;
            color: var(--ds-text-secondary);
            margin-top: 4px;
            letter-spacing: 0.03em;
        }

        .tier-preview-cards {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            width: 100%;
            justify-content: center;
        }

        .tier-preview-card {
            flex: 1;
            min-width: 100px;
            max-width: 150px;
            padding: 16px 14px;
            background: var(--ds-warm-bg2);
            border-radius: var(--ds-radius);
            text-align: center;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .tier-preview-card:hover {
            border-color: var(--ds-gold);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-3px);
            background: var(--ds-white);
        }

        .tier-preview-card .tier-icon {
            font-size: 28px;
            margin-bottom: 8px;
            color: var(--ds-gold);
        }

        .tier-preview-card .tier-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-deep);
            margin-bottom: 4px;
        }

        .tier-preview-card .tier-desc {
            font-size: 12px;
            color: var(--ds-text-light);
            line-height: 1.4;
        }

        .tier-preview-card.featured {
            background: var(--ds-deep);
            border-color: var(--ds-deep);
            color: var(--ds-white);
        }

        .tier-preview-card.featured .tier-name {
            color: var(--ds-gold-light);
        }

        .tier-preview-card.featured .tier-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .tier-preview-card.featured .tier-icon {
            color: var(--ds-gold-light);
        }

        /* ========== SECTION COMMON ========== */
        .section-pad {
            padding: var(--ds-section-gap) 0;
        }

        .section-pad-sm {
            padding: 48px 0;
        }

        .section-title {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--ds-deep);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin-bottom: 40px;
            max-width: 600px;
        }

        .section-bg-white {
            background: var(--ds-white);
        }

        .section-bg-warm {
            background: var(--ds-warm-bg2);
        }

        .section-bg-deep {
            background: var(--ds-deep);
            color: var(--ds-white);
        }

        .section-bg-deep .section-title {
            color: var(--ds-white);
        }

        .section-bg-deep .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== 双栏图文 ========== */
        .dual-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .dual-block.reverse {
            direction: rtl;
        }

        .dual-block.reverse>* {
            direction: ltr;
        }

        .dual-block .dual-text h3 {
            font-family: var(--ds-font-heading);
            font-size: 28px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .dual-block .dual-text p {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .dual-block .dual-text .highlight-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
        }

        .dual-block .dual-text .highlight-list li {
            padding: 6px 0 6px 24px;
            position: relative;
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
        }

        .dual-block .dual-text .highlight-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 14px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ds-gold);
        }

        .dual-block .dual-image {
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-lg);
        }

        .dual-block .dual-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* ========== 深度内容区 ========== */
        .deep-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .deep-content h3 {
            font-family: var(--ds-font-heading);
            font-size: 24px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .deep-content p {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
            text-align: justify;
        }

        .deep-content .insight-box {
            background: var(--ds-warm-bg2);
            border-left: 4px solid var(--ds-gold);
            padding: 20px 24px;
            border-radius: 0 var(--ds-radius) var(--ds-radius) 0;
            margin: 24px 0;
            font-size: 15px;
            color: var(--ds-text);
            line-height: 1.7;
        }

        /* ========== 数据指标条 ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            padding: 28px 16px;
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
        }

        .stat-item:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
            transform: translateY(-2px);
        }

        .stat-item .stat-number {
            font-family: var(--ds-font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: var(--ds-text-secondary);
            font-weight: 500;
        }

        /* ========== 档位详情卡片 ========== */
        .tier-detail-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .tier-detail-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 32px 24px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            position: relative;
            overflow: hidden;
        }

        .tier-detail-card:hover {
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-gold-light);
            transform: translateY(-4px);
        }

        .tier-detail-card.popular {
            border-color: var(--ds-gold);
            box-shadow: var(--ds-shadow-md);
        }

        .tier-detail-card .popular-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--ds-gold);
            color: var(--ds-white);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }

        .tier-detail-card .tier-header {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
        }

        .tier-detail-card .tier-price-range {
            font-size: 14px;
            color: var(--ds-gold);
            font-weight: 600;
            margin-bottom: 16px;
        }

        .tier-detail-card .tier-features {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .tier-detail-card .tier-features li {
            padding: 6px 0;
            font-size: 14px;
            color: var(--ds-text-secondary);
            border-bottom: 1px solid var(--ds-border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tier-detail-card .tier-features li i {
            color: var(--ds-gold);
            font-size: 12px;
        }

        .tier-detail-card .btn-tier-select {
            display: block;
            width: 100%;
            padding: 12px;
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--ds-radius-sm);
            border: 1.5px solid var(--ds-deep);
            background: transparent;
            color: var(--ds-deep);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .tier-detail-card .btn-tier-select:hover {
            background: var(--ds-deep);
            color: var(--ds-white);
        }

        .tier-detail-card.popular .btn-tier-select {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-white);
        }

        .tier-detail-card.popular .btn-tier-select:hover {
            background: var(--ds-gold-hover);
            border-color: var(--ds-gold-hover);
            color: var(--ds-white);
        }

        /* ========== 相关推荐卡片 ========== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            padding: 20px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .related-card:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
            transform: translateY(-2px);
        }

        .related-card .related-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--ds-gold);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .related-card .related-title {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 600;
            color: var(--ds-deep);
            line-height: 1.4;
        }

        .related-card .related-desc {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
        }

        .related-card .related-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--ds-gold);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--ds-transition-fast);
        }

        .related-card .related-link:hover {
            gap: 8px;
            color: var(--ds-gold-hover);
        }

        /* ========== FAQ ========== */
        .faq-accordion .faq-item {
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            margin-bottom: 10px;
            background: var(--ds-white);
            overflow: hidden;
            transition: all var(--ds-transition-fast);
        }

        .faq-accordion .faq-item:hover {
            border-color: var(--ds-gold-light);
        }

        .faq-accordion .faq-question {
            width: 100%;
            padding: 18px 20px;
            background: none;
            border: none;
            text-align: left;
            font-family: var(--ds-font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: color var(--ds-transition-fast);
        }

        .faq-accordion .faq-question:hover {
            color: var(--ds-gold);
        }

        .faq-accordion .faq-question .faq-icon {
            font-size: 14px;
            transition: transform var(--ds-transition-fast);
            color: var(--ds-text-light);
            flex-shrink: 0;
            margin-left: 12px;
        }

        .faq-accordion .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--ds-gold);
        }

        .faq-accordion .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, padding 0.35s ease-out;
        }

        .faq-accordion .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-accordion .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--ds-deep);
            color: var(--ds-white);
            padding: 56px 0;
            text-align: center;
            border-radius: var(--ds-radius-lg);
            margin: 0 20px;
        }

        .cta-section h3 {
            font-family: var(--ds-font-heading);
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-gold {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border: none;
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-cta-gold:hover {
            background: var(--ds-gold-light);
            color: var(--ds-deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(176, 141, 87, 0.35);
        }

        /* ========== 底部固定转化条 ========== */
        .bottom-sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(26, 26, 26, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .bottom-sticky-bar .sticky-text {
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-white);
            white-space: nowrap;
        }

        .bottom-sticky-bar .btn-sticky-cta {
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border: none;
            border-radius: var(--ds-radius-sm);
            cursor: pointer;
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
        }

        .bottom-sticky-bar .btn-sticky-cta:hover {
            background: var(--ds-gold-light);
            transform: translateY(-1px);
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            margin-top: 0;
            margin-bottom: 64px;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 10px;
        }

        .ds-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 280px;
        }

        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            margin-bottom: 14px;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 8px;
        }

        .ds-footer ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            justify-content: space-between;
            align-items: center;
        }

        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeUpIn {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .reveal-on-scroll.revealed {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .hero-trade-left h1 {
                font-size: 42px;
            }
            .section-title {
                font-size: 30px;
            }
            .dual-block {
                gap: 36px;
            }
            .tier-detail-grid {
                gap: 16px;
            }
            .tier-detail-card {
                padding: 24px 18px;
            }
            .stats-strip {
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 34px;
            }
            .ds-footer .footer-grid {
                gap: 24px;
            }
        }

        @media (max-width: 991px) {
            .hero-trade-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-trade-right {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
                gap: 20px;
            }
            .progress-ring-wrap {
                width: 160px;
                height: 160px;
            }
            .progress-ring-center .progress-value {
                font-size: 36px;
            }
            .tier-preview-cards {
                flex: 1 1 100%;
                justify-content: center;
            }
            .tier-preview-card {
                min-width: 90px;
                max-width: 130px;
                padding: 12px 10px;
            }
            .dual-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .dual-block.reverse {
                direction: ltr;
            }
            .dual-block .dual-image {
                order: -1;
            }
            .dual-block.reverse .dual-image {
                order: -1;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .tier-detail-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .ds-nav-links {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(26, 26, 26, 0.97);
                z-index: 1055;
                padding: 80px 32px 32px;
                gap: 4px;
                align-items: stretch;
                overflow-y: auto;
            }
            .ds-nav-links.mobile-open li a {
                color: rgba(255, 255, 255, 0.9);
                font-size: 20px;
                padding: 14px 16px;
                border-radius: var(--ds-radius);
                display: block;
            }
            .ds-nav-links.mobile-open li a:hover,
            .ds-nav-links.mobile-open li a.active {
                color: var(--ds-gold-light);
                background: rgba(255, 255, 255, 0.06);
            }
            .ds-nav-links.mobile-open li a.active::after {
                display: none;
            }
            .desktop-only {
                display: none !important;
            }
            .bottom-sticky-bar {
                padding: 10px 16px;
                gap: 12px;
            }
            .bottom-sticky-bar .sticky-text {
                font-size: 13px;
            }
            .bottom-sticky-bar .btn-sticky-cta {
                padding: 8px 18px;
                font-size: 13px;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav.scrolled {
                height: 52px;
            }
            .ds-nav-logo {
                font-size: 18px;
                gap: 8px;
            }
            .ds-nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .hero-trade {
                padding: 36px 0 48px;
            }
            .hero-trade-left h1 {
                font-size: 32px;
            }
            .hero-trade-left .hero-subtitle {
                font-size: 15px;
            }
            .progress-ring-wrap {
                width: 130px;
                height: 130px;
            }
            .progress-ring-center .progress-value {
                font-size: 30px;
            }
            .tier-preview-card {
                min-width: 75px;
                max-width: 100px;
                padding: 10px 8px;
            }
            .tier-preview-card .tier-name {
                font-size: 12px;
            }
            .tier-preview-card .tier-desc {
                font-size: 11px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 14px;
            }
            .dual-block .dual-text h3 {
                font-size: 22px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
            .stat-item .stat-label {
                font-size: 12px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                margin: 0 12px;
                padding: 40px 16px;
                border-radius: var(--ds-radius);
            }
            .cta-section h3 {
                font-size: 24px;
            }
            .ds-footer {
                padding: 40px 0 20px;
                margin-bottom: 56px;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
                font-size: 12px;
            }
            .bottom-sticky-bar {
                flex-direction: column;
                gap: 8px;
                padding: 8px 14px;
                text-align: center;
            }
            .faq-accordion .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-accordion .faq-answer-inner {
                font-size: 14px;
                padding: 0 16px 14px;
            }
            .deep-content h3 {
                font-size: 20px;
            }
            .deep-content p {
                font-size: 15px;
                text-align: left;
            }
            .section-pad {
                padding: var(--ds-section-gap-mobile) 0;
            }
        }

        @media (max-width: 520px) {
            .hero-trade-left h1 {
                font-size: 28px;
            }
            .btn-primary-ds,
            .btn-outline-ds {
                padding: 12px 20px;
                font-size: 14px;
            }
            .hero-trade-cta-group {
                gap: 10px;
            }
            .tier-preview-cards {
                flex-wrap: wrap;
            }
            .tier-preview-card {
                min-width: 70px;
                max-width: 90px;
                padding: 8px 6px;
            }
            .tier-preview-card .tier-icon {
                font-size: 22px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .progress-ring-wrap {
                width: 110px;
                height: 110px;
            }
            .progress-ring-center .progress-value {
                font-size: 26px;
            }
            .progress-ring-center .progress-label {
                font-size: 11px;
            }
        }

/* roulang page: category4 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: 1.5px solid var(--ds-deep);
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--ds-deep);
            border-radius: 2px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .desktop-only {
            display: inline-flex;
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            background: transparent;
            padding: 16px 0 8px;
            font-size: 14px;
            color: var(--ds-text-light);
        }

        .ds-breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .separator {
            margin: 0 8px;
            color: var(--ds-border);
        }

        .ds-breadcrumb .current {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== PAGE HERO ========== */
        .ds-page-hero {
            padding: 60px 0 40px;
            background: var(--ds-white);
            border-bottom: 1px solid var(--ds-border-light);
        }

        .ds-page-hero .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .ds-page-hero .hero-content h1 {
            font-family: var(--ds-font-heading);
            font-size: 44px;
            font-weight: 800;
            line-height: 1.18;
            color: var(--ds-deep);
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }

        .ds-page-hero .hero-content .subtitle {
            font-size: 18px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .ds-page-hero .hero-image {
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-lg);
        }

        .ds-page-hero .hero-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
            border-radius: var(--ds-radius-lg);
        }

        /* ========== LONG-FORM CONTENT SECTIONS ========== */
        .ds-content-section {
            padding: var(--ds-section-gap) 0;
        }

        .ds-content-section.bg-warm {
            background: var(--ds-warm-bg2);
        }

        .ds-content-section.bg-white {
            background: var(--ds-white);
        }

        .ds-content-section.bg-deep {
            background: var(--ds-deep);
            color: var(--ds-warm-bg);
        }

        .ds-content-section .section-header {
            margin-bottom: 36px;
        }

        .ds-content-section .section-header h2 {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: inherit;
            margin: 0 0 12px;
            letter-spacing: 0.01em;
        }

        .ds-content-section.bg-deep .section-header h2 {
            color: var(--ds-white);
        }

        .ds-content-section .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 10px;
        }

        .ds-content-section.bg-deep .section-tag {
            color: var(--ds-gold-light);
        }

        /* Long-form text block */
        .ds-long-text {
            font-size: 16px;
            line-height: 1.85;
            color: var(--ds-text-secondary);
        }

        .ds-content-section.bg-deep .ds-long-text {
            color: #D5D0C8;
        }

        .ds-long-text p {
            margin-bottom: 20px;
        }

        .ds-long-text p:last-child {
            margin-bottom: 0;
        }

        .ds-long-text h3 {
            font-family: var(--ds-font-heading);
            font-size: 24px;
            font-weight: 700;
            color: var(--ds-deep);
            margin: 32px 0 14px;
            line-height: 1.35;
        }

        .ds-content-section.bg-deep .ds-long-text h3 {
            color: var(--ds-white);
        }

        /* Large image with caption */
        .ds-large-image {
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-md);
            margin: 24px 0;
        }

        .ds-large-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--ds-radius-lg);
        }

        .ds-large-image .image-caption {
            font-size: 13px;
            color: var(--ds-text-light);
            margin-top: 10px;
            text-align: center;
            font-style: italic;
        }

        /* Two-column layout for long-form */
        .ds-two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .ds-two-col.wide-left {
            grid-template-columns: 1.3fr 1fr;
        }

        .ds-two-col.wide-right {
            grid-template-columns: 1fr 1.3fr;
        }

        /* ========== DATA METRICS ========== */
        .ds-metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin: 32px 0;
        }

        .ds-metric-card {
            background: var(--ds-white);
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--ds-transition-fast);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-metric-card:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
            transform: translateY(-2px);
        }

        .ds-metric-card .metric-number {
            font-family: var(--ds-font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .ds-metric-card .metric-unit {
            font-size: 18px;
            font-weight: 500;
            color: var(--ds-text-secondary);
        }

        .ds-metric-card .metric-label {
            font-size: 14px;
            color: var(--ds-text-light);
            margin-top: 4px;
        }

        .ds-content-section.bg-deep .ds-metric-card {
            background: var(--ds-deep2);
            border-color: var(--ds-deep3);
        }

        .ds-content-section.bg-deep .ds-metric-card .metric-number {
            color: var(--ds-gold-light);
        }

        .ds-content-section.bg-deep .ds-metric-card .metric-unit,
        .ds-content-section.bg-deep .ds-metric-card .metric-label {
            color: #B8B0A5;
        }

        /* ========== PROCESS STEPS ========== */
        .ds-process-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: process-step;
        }

        .ds-process-list li {
            counter-increment: process-step;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            padding: 24px 0;
            border-bottom: 1px solid var(--ds-border-light);
            position: relative;
        }

        .ds-process-list li:last-child {
            border-bottom: none;
        }

        .ds-process-list .step-number {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--ds-deep);
            color: var(--ds-gold-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ds-font-number);
            font-size: 20px;
            font-weight: 700;
        }

        .ds-process-list .step-content h4 {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-deep);
            margin: 0 0 8px;
        }

        .ds-process-list .step-content p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .ds-content-section.bg-deep .ds-process-list .step-number {
            background: var(--ds-gold);
            color: var(--ds-deep);
        }

        .ds-content-section.bg-deep .ds-process-list .step-content h4 {
            color: var(--ds-white);
        }

        .ds-content-section.bg-deep .ds-process-list .step-content p {
            color: #D5D0C8;
        }

        .ds-content-section.bg-deep .ds-process-list li {
            border-bottom-color: var(--ds-deep3);
        }

        /* ========== CASE CARDS ========== */
        .ds-case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .ds-case-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            overflow: hidden;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-case-card:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
            transform: translateY(-3px);
        }

        .ds-case-card .case-image {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .ds-case-card .case-body {
            padding: 22px 24px;
        }

        .ds-case-card .case-body h4 {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
            margin: 0 0 8px;
            line-height: 1.35;
        }

        .ds-case-card .case-body p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin: 0 0 12px;
        }

        .ds-case-card .case-body .case-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--ds-gold);
            background: var(--ds-warm-bg3);
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }

        /* ========== FAQ ACCORDION OVERRIDES ========== */
        .ds-faq .accordion-item {
            border: none;
            border-bottom: 1px solid var(--ds-border-light);
            background: transparent;
            margin-bottom: 0;
        }

        .ds-faq .accordion-button {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 600;
            color: var(--ds-deep);
            background: transparent;
            padding: 20px 0;
            box-shadow: none;
            border: none;
            transition: color var(--ds-transition-fast);
        }

        .ds-faq .accordion-button:not(.collapsed) {
            color: var(--ds-gold);
            background: transparent;
            box-shadow: none;
        }

        .ds-faq .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
            outline: 2px solid var(--ds-gold);
            outline-offset: 2px;
            border-radius: var(--ds-radius-sm);
        }

        .ds-faq .accordion-button::after {
            background-image: none;
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 16px;
            color: var(--ds-text-light);
            transition: transform var(--ds-transition-fast);
        }

        .ds-faq .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--ds-gold);
        }

        .ds-faq .accordion-body {
            padding: 0 0 20px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--ds-text-secondary);
        }

        /* ========== CTA SECTION ========== */
        .ds-cta-section {
            padding: 60px 0;
            background: var(--ds-deep);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .ds-cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(176, 141, 87, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .ds-cta-section .cta-content {
            position: relative;
            z-index: 1;
        }

        .ds-cta-section h2 {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            color: var(--ds-white);
            margin: 0 0 12px;
        }

        .ds-cta-section p {
            font-size: 17px;
            color: #D5D0C8;
            margin: 0 0 28px;
            line-height: 1.7;
        }

        .ds-cta-section .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border-radius: var(--ds-radius-sm);
            border: none;
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
        }

        .ds-cta-section .btn-cta-primary:hover {
            background: var(--ds-gold-hover);
            color: var(--ds-white);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-lg);
        }

        .ds-cta-section .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-white);
            background: transparent;
            border-radius: var(--ds-radius-sm);
            border: 1.5px solid var(--ds-gold);
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
            margin-left: 14px;
        }

        .ds-cta-section .btn-cta-secondary:hover {
            background: rgba(176, 141, 87, 0.12);
            border-color: var(--ds-gold-light);
            color: var(--ds-gold-light);
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: #B8B0A5;
            padding: 56px 0 28px;
            font-size: 14px;
            line-height: 1.7;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 10px;
        }

        .ds-footer .footer-desc {
            font-size: 14px;
            color: #A0988C;
            line-height: 1.7;
            margin: 0;
        }

        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 8px;
        }

        .ds-footer ul li a {
            color: #A0988C;
            font-size: 14px;
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            border-top: 1px solid var(--ds-deep3);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #8A8278;
        }

        .ds-footer .footer-bottom a {
            color: #8A8278;
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        /* ========== BUTTONS GLOBAL ========== */
        .btn-outline-ds {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-deep);
            background: transparent;
            border: 1.5px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
        }

        .btn-outline-ds:hover {
            background: var(--ds-deep);
            color: var(--ds-white);
        }

        .btn-solid-ds {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border: 1.5px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            letter-spacing: 0.02em;
        }

        .btn-solid-ds:hover {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-white);
        }

        .btn-text-ds {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-gold);
            background: none;
            border: none;
            padding: 0;
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-text-ds:hover {
            color: var(--ds-gold-hover);
            gap: 10px;
        }

        .btn-text-ds .arrow {
            transition: transform var(--ds-transition-fast);
        }

        .btn-text-ds:hover .arrow {
            transform: translateX(3px);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .ds-nav-links li a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .ds-nav-logo {
                font-size: 19px;
            }
            .ds-page-hero .hero-content h1 {
                font-size: 36px;
            }
            .ds-content-section .section-header h2 {
                font-size: 30px;
            }
            .ds-metrics-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 991px) {
            .ds-nav-links {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--ds-deep);
                flex-direction: column;
                align-items: stretch;
                justify-content: center;
                gap: 0;
                padding: 80px 32px 40px;
                transform: translateX(100%);
                transition: transform var(--ds-transition);
                z-index: 1055;
            }
            .ds-nav-links.open {
                transform: translateX(0);
            }
            .ds-nav-links li a {
                font-size: 20px;
                color: #D5D0C8;
                padding: 16px 0;
                border-bottom: 1px solid var(--ds-deep3);
                text-align: center;
            }
            .ds-nav-links li a:hover,
            .ds-nav-links li a.active {
                color: var(--ds-gold-light);
            }
            .ds-nav-links li a.active::after {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .desktop-only {
                display: none;
            }
            .ds-page-hero .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .ds-page-hero .hero-content h1 {
                font-size: 32px;
            }
            .ds-two-col,
            .ds-two-col.wide-left,
            .ds-two-col.wide-right {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .ds-case-grid {
                grid-template-columns: 1fr;
            }
            .ds-cta-section h2 {
                font-size: 28px;
            }
            .ds-cta-section .btn-cta-secondary {
                margin-left: 0;
                margin-top: 12px;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav.scrolled {
                height: 52px;
            }
            .ds-nav-logo {
                font-size: 17px;
            }
            .ds-nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .ds-page-hero {
                padding: 36px 0 28px;
            }
            .ds-page-hero .hero-content h1 {
                font-size: 28px;
            }
            .ds-page-hero .hero-content .subtitle {
                font-size: 15px;
            }
            .ds-content-section {
                padding: var(--ds-section-gap-mobile) 0;
            }
            .ds-content-section .section-header h2 {
                font-size: 26px;
            }
            .ds-metrics-row {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .ds-metric-card .metric-number {
                font-size: 32px;
            }
            .ds-process-list li {
                flex-direction: column;
                gap: 14px;
            }
            .ds-cta-section {
                padding: 40px 0;
            }
            .ds-cta-section h2 {
                font-size: 24px;
            }
            .ds-cta-section p {
                font-size: 15px;
            }
            .ds-cta-section .btn-cta-primary,
            .ds-cta-section .btn-cta-secondary {
                padding: 12px 24px;
                font-size: 14px;
                display: block;
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .ds-cta-section .btn-cta-secondary {
                margin-left: 0;
                margin-top: 10px;
            }
            .ds-large-image {
                margin: 16px 0;
            }
            .ds-long-text {
                font-size: 15px;
            }
            .ds-long-text h3 {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .ds-metrics-row {
                grid-template-columns: 1fr;
            }
            .ds-page-hero .hero-content h1 {
                font-size: 24px;
            }
            .ds-content-section .section-header h2 {
                font-size: 22px;
            }
            .ds-faq .accordion-button {
                font-size: 15px;
                padding: 16px 0;
            }
        }

/* roulang page: category5 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
            flex-shrink: 0;
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
            justify-content: center;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--ds-deep);
            border-radius: 2px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            background: var(--ds-warm-bg2);
            padding: 18px 0;
            border-bottom: 1px solid var(--ds-border-light);
        }

        .ds-breadcrumb .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ds-text-light);
            flex-wrap: wrap;
        }

        .ds-breadcrumb .breadcrumb-inner a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb .breadcrumb-inner a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .breadcrumb-inner .separator {
            color: var(--ds-border);
            font-size: 12px;
        }

        .ds-breadcrumb .breadcrumb-inner .current {
            color: var(--ds-gold);
            font-weight: 600;
        }

        /* ========== BUTTONS ========== */
        .btn-ds-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border: none;
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            font-family: var(--ds-font-body);
        }

        .btn-ds-primary:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-md);
        }

        .btn-ds-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 26px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: transparent;
            border: 1.5px solid var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            font-family: var(--ds-font-body);
        }

        .btn-ds-outline:hover {
            background: var(--ds-warm-bg3);
            border-color: var(--ds-gold);
            color: var(--ds-gold);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-sm);
        }

        .btn-ds-gold {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border: none;
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            font-family: var(--ds-font-body);
        }

        .btn-ds-gold:hover {
            background: var(--ds-gold-hover);
            color: var(--ds-white);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-md);
        }

        .btn-ds-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            background: none;
            border: none;
            padding: 0;
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .btn-ds-text .arrow {
            transition: transform var(--ds-transition-fast);
        }

        .btn-ds-text:hover {
            color: var(--ds-gold-hover);
        }

        .btn-ds-text:hover .arrow {
            transform: translateX(4px);
        }

        /* ========== SECTION SPACING ========== */
        .ds-section {
            padding: var(--ds-section-gap) 0;
        }

        .ds-section-sm {
            padding: 48px 0;
        }

        .ds-section-lg {
            padding: 100px 0;
        }

        /* ========== HERO BANNER ========== */
        .cat-hero {
            background: var(--ds-deep);
            position: relative;
            padding: 60px 0;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }

        .cat-hero .cat-hero-content {
            position: relative;
            z-index: 1;
        }

        .cat-hero h1 {
            font-family: var(--ds-font-heading);
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--ds-white);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .cat-hero .cat-hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .cat-hero .cat-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--ds-gold);
            color: var(--ds-deep);
            font-size: 13px;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        /* ========== DATA METRICS ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            position: relative;
            overflow: hidden;
        }

        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-gold-light);
        }

        .metric-card .metric-number {
            font-family: var(--ds-font-number);
            font-size: 44px;
            font-weight: 700;
            color: var(--ds-deep);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        .metric-card .metric-number .unit {
            font-size: 22px;
            font-weight: 500;
            color: var(--ds-gold);
            margin-left: 2px;
        }

        .metric-card .metric-label {
            font-size: 14px;
            color: var(--ds-text-secondary);
            font-weight: 500;
            line-height: 1.4;
        }

        .metric-card .metric-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--ds-warm-bg2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 20px;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
        }

        .metric-card:hover .metric-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        /* ========== CHART ROW ========== */
        .chart-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .chart-visual {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 40px;
            border: 1px solid var(--ds-border-light);
            min-height: 360px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .chart-visual .bar-chart {
            display: flex;
            align-items: flex-end;
            gap: 20px;
            height: 200px;
            padding-top: 20px;
        }

        .chart-visual .bar {
            flex: 1;
            border-radius: 6px 6px 0 0;
            transition: all var(--ds-transition);
            position: relative;
            min-width: 28px;
        }

        .chart-visual .bar:hover {
            filter: brightness(1.1);
            transform: scaleY(1.03);
            transform-origin: bottom;
        }

        .chart-visual .bar-label {
            text-align: center;
            font-size: 12px;
            color: var(--ds-text-light);
            margin-top: 8px;
            font-weight: 500;
        }

        .chart-visual .chart-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 20px;
            text-align: center;
        }

        /* ========== SERVICE CARDS ========== */
        .service-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .service-card-compact {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            padding: 28px 24px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .service-card-compact:hover {
            transform: translateY(-3px);
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
        }

        .service-card-compact .sc-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--ds-radius-sm);
            background: var(--ds-warm-bg2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--ds-gold);
            flex-shrink: 0;
            transition: all var(--ds-transition-fast);
        }

        .service-card-compact:hover .sc-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .service-card-compact .sc-info h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 6px;
            line-height: 1.3;
        }

        .service-card-compact .sc-info p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== COMPARISON TABLE ========== */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--ds-radius-lg);
            border: 1px solid var(--ds-border-light);
            background: var(--ds-white);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .compare-table th,
        .compare-table td {
            padding: 16px 20px;
            text-align: left;
            font-size: 14px;
            line-height: 1.6;
        }

        .compare-table thead th {
            background: var(--ds-deep);
            color: var(--ds-white);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
        }

        .compare-table tbody tr {
            border-bottom: 1px solid var(--ds-border-light);
            transition: background var(--ds-transition-fast);
        }

        .compare-table tbody tr:hover {
            background: var(--ds-warm-bg2);
        }

        .compare-table tbody tr:last-child {
            border-bottom: none;
        }

        .compare-table .highlight-col {
            color: var(--ds-gold);
            font-weight: 700;
        }

        .compare-table .check-icon {
            color: #4CAF50;
            font-weight: 700;
        }

        /* ========== FAQ ========== */
        .faq-accordion .faq-item {
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            margin-bottom: 12px;
            background: var(--ds-white);
            overflow: hidden;
            transition: all var(--ds-transition-fast);
        }

        .faq-accordion .faq-item:hover {
            border-color: var(--ds-gold-light);
        }

        .faq-accordion .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--ds-deep);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-family: var(--ds-font-body);
            gap: 16px;
            transition: color var(--ds-transition-fast);
        }

        .faq-accordion .faq-question:hover {
            color: var(--ds-gold);
        }

        .faq-accordion .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--ds-warm-bg2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: all var(--ds-transition-fast);
            color: var(--ds-text-secondary);
        }

        .faq-accordion .faq-item.open .faq-question .faq-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
            transform: rotate(45deg);
        }

        .faq-accordion .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, padding 0.35s ease-out;
            padding: 0 24px;
        }

        .faq-accordion .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-accordion .faq-answer p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ========== CTA BAR ========== */
        .cta-bar-fixed {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(26, 26, 26, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 14px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .cta-bar-fixed .cta-bar-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            flex-wrap: wrap;
        }

        .cta-bar-fixed .cta-bar-text {
            color: rgba(255, 255, 255, 0.9);
            font-size: 15px;
            font-weight: 500;
            white-space: nowrap;
        }

        .cta-bar-fixed .btn-ds-gold {
            flex-shrink: 0;
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            margin-bottom: 70px;
            font-size: 14px;
            line-height: 1.7;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
        }

        .ds-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .ds-footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 8px;
        }

        .ds-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .ds-nav-links li a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .chart-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .service-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 991px) {
            .ds-nav-links {
                gap: 2px;
            }
            .ds-nav-links li a {
                padding: 8px 8px;
                font-size: 12px;
            }
            .cat-hero h1 {
                font-size: 36px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-list-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav.scrolled {
                height: 52px;
            }
            .ds-nav .nav-container {
                padding: 0 16px;
            }
            .ds-nav-logo {
                font-size: 18px;
                gap: 8px;
            }
            .ds-nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .ds-nav-links {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--ds-deep);
                flex-direction: column;
                justify-content: center;
                gap: 4px;
                padding: 40px 20px;
                transform: translateX(100%);
                transition: transform var(--ds-transition);
                z-index: 1055;
            }
            .ds-nav-links.open {
                transform: translateX(0);
            }
            .ds-nav-links li a {
                color: rgba(255, 255, 255, 0.85);
                font-size: 20px;
                padding: 12px 20px;
                display: block;
                text-align: center;
            }
            .ds-nav-links li a.active {
                color: var(--ds-gold-light);
            }
            .ds-nav-links li a.active::after {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav-cta.desktop-only {
                display: none;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
            .cat-hero .cat-hero-subtitle {
                font-size: 15px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-card {
                padding: 20px 14px;
            }
            .metric-card .metric-number {
                font-size: 32px;
            }
            .chart-row {
                grid-template-columns: 1fr;
            }
            .chart-visual {
                padding: 24px;
                min-height: 260px;
            }
            .service-list-grid {
                grid-template-columns: 1fr;
            }
            .ds-section {
                padding: var(--ds-section-gap-mobile) 0;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .cta-bar-fixed {
                padding: 10px 0;
            }
            .cta-bar-fixed .cta-bar-inner {
                gap: 12px;
            }
            .cta-bar-fixed .cta-bar-text {
                font-size: 13px;
            }
            .compare-table-wrap {
                margin: 0 -16px;
                border-radius: 0;
            }
            .compare-table th,
            .compare-table td {
                padding: 10px 12px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .metric-card {
                padding: 18px 14px;
            }
            .metric-card .metric-number {
                font-size: 28px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .service-list-grid {
                grid-template-columns: 1fr;
            }
            .chart-visual .bar-chart {
                gap: 10px;
                height: 150px;
            }
        }

/* roulang page: category6 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: 1.5px solid var(--ds-deep);
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            border-color: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--ds-deep);
            border-radius: 2px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .desktop-only {
            display: inline-flex;
        }

        @media (max-width: 991px) {
            .desktop-only {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                height: 100vh;
                background: var(--ds-deep);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 20px;
                transition: right var(--ds-transition);
                z-index: 1055;
            }
            .ds-nav-links.active {
                right: 0;
            }
            .ds-nav-links li a {
                font-size: 20px;
                color: var(--ds-warm-bg);
                padding: 12px 24px;
            }
            .ds-nav-links li a:hover,
            .ds-nav-links li a.active {
                color: var(--ds-gold-light);
            }
            .ds-nav-links li a.active::after {
                background: var(--ds-gold-light);
                bottom: 4px;
            }
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--ds-text-light);
            background: transparent;
            margin: 0;
        }
        .ds-breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }
        .ds-breadcrumb a:hover {
            color: var(--ds-gold);
        }
        .ds-breadcrumb .separator {
            margin: 0 8px;
            color: var(--ds-border);
        }
        .ds-breadcrumb .current {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== HERO BANNER ========== */
        .ds-hero-banner {
            position: relative;
            background: var(--ds-deep);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 80px 0;
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .ds-hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.88) 0%, rgba(26, 26, 26, 0.72) 60%, rgba(26, 26, 26, 0.55) 100%);
            z-index: 1;
        }
        .ds-hero-banner .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .ds-hero-banner .hero-text {
            flex: 1 1 420px;
        }
        .ds-hero-banner .hero-text h1 {
            font-family: var(--ds-font-heading);
            font-size: 48px;
            font-weight: 800;
            line-height: 1.18;
            color: var(--ds-white);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }
        .ds-hero-banner .hero-text h1 span {
            color: var(--ds-gold-light);
        }
        .ds-hero-banner .hero-text .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .ds-hero-banner .hero-visual {
            flex: 0 0 340px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--ds-radius-lg);
            padding: 28px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
        }
        .ds-hero-banner .hero-visual .stat-row {
            display: flex;
            gap: 20px;
            margin-bottom: 16px;
        }
        .ds-hero-banner .hero-visual .stat-item {
            flex: 1;
            text-align: center;
        }
        .ds-hero-banner .hero-visual .stat-num {
            font-family: var(--ds-font-number);
            font-size: 38px;
            font-weight: 700;
            color: var(--ds-gold-light);
            line-height: 1.1;
        }
        .ds-hero-banner .hero-visual .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        @media (max-width: 767px) {
            .ds-hero-banner {
                padding: 48px 0;
                min-height: auto;
            }
            .ds-hero-banner .hero-text h1 {
                font-size: 32px;
            }
            .ds-hero-banner .hero-visual {
                flex: 1 1 100%;
                max-width: 100%;
            }
            .ds-hero-banner .hero-inner {
                gap: 28px;
            }
        }

        /* ========== BTN STYLES ========== */
        .btn-ds-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-gold);
            border: 1.5px solid var(--ds-gold);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-ds-primary:hover {
            background: var(--ds-gold-hover);
            border-color: var(--ds-gold-hover);
            color: var(--ds-white);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-md);
        }
        .btn-ds-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-ds-outline:hover {
            border-color: var(--ds-gold-light);
            color: var(--ds-gold-light);
            background: rgba(255, 255, 255, 0.05);
        }
        .btn-ds-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            background: none;
            border: none;
            padding: 0;
        }
        .btn-ds-arrow i {
            transition: transform var(--ds-transition-fast);
        }
        .btn-ds-arrow:hover {
            color: var(--ds-gold-hover);
        }
        .btn-ds-arrow:hover i {
            transform: translateX(4px);
        }

        /* ========== SECTION COMMON ========== */
        .ds-section {
            padding: var(--ds-section-gap) 0;
        }
        .ds-section-sm {
            padding: 48px 0;
        }
        .ds-section-dark {
            background: var(--ds-deep);
            color: var(--ds-white);
        }
        .ds-section-warm {
            background: var(--ds-warm-bg2);
        }
        .ds-section-white {
            background: var(--ds-white);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }
        .section-title {
            font-family: var(--ds-font-heading);
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: inherit;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--ds-text-secondary);
            line-height: 1.8;
            max-width: 720px;
        }
        .ds-section-dark .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 767px) {
            .ds-section {
                padding: var(--ds-section-gap-mobile) 0;
            }
            .section-title {
                font-size: 26px;
            }
        }

        /* ========== TIMELINE ========== */
        .timeline-wrapper {
            position: relative;
            padding: 40px 0;
        }
        .timeline-wrapper::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--ds-border);
            transform: translateX(-50%);
        }
        .timeline-item {
            display: flex;
            align-items: flex-start;
            position: relative;
            margin-bottom: 56px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item .tl-content {
            flex: 1;
            max-width: 46%;
            padding: 24px 28px;
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            border: 1px solid var(--ds-border-light);
            box-shadow: var(--ds-shadow-sm);
            transition: all var(--ds-transition);
            position: relative;
        }
        .timeline-item .tl-content:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-border);
            transform: translateY(-2px);
        }
        .timeline-item .tl-marker {
            flex: 0 0 48px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--ds-white);
            border: 3px solid var(--ds-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ds-font-number);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-gold);
            z-index: 2;
            position: relative;
            flex-shrink: 0;
            transition: all var(--ds-transition-fast);
        }
        .timeline-item:hover .tl-marker {
            background: var(--ds-gold);
            color: var(--ds-white);
            box-shadow: 0 0 0 10px rgba(176, 141, 87, 0.15);
        }
        .timeline-item .tl-spacer {
            flex: 1;
            max-width: 46%;
        }
        .timeline-item:nth-child(odd) {
            flex-direction: row;
        }
        .timeline-item:nth-child(odd) .tl-content {
            margin-right: 24px;
            text-align: right;
        }
        .timeline-item:nth-child(odd) .tl-spacer {
            order: 3;
        }
        .timeline-item:nth-child(odd) .tl-marker {
            order: 2;
            margin: 0 0 0 0;
        }
        .timeline-item:nth-child(even) {
            flex-direction: row-reverse;
        }
        .timeline-item:nth-child(even) .tl-content {
            margin-left: 24px;
            text-align: left;
        }
        .timeline-item:nth-child(even) .tl-spacer {
            order: 1;
        }
        .timeline-item:nth-child(even) .tl-marker {
            order: 2;
        }
        .tl-content .tl-phase {
            font-size: 12px;
            font-weight: 700;
            color: var(--ds-gold);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }
        .tl-content .tl-title {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .tl-content .tl-desc {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .tl-content .tl-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .tl-content .tl-tags .tl-tag {
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 20px;
            background: var(--ds-warm-bg3);
            color: var(--ds-text-secondary);
            font-weight: 500;
            white-space: nowrap;
        }
        .timeline-item:nth-child(odd) .tl-tags {
            justify-content: flex-end;
        }
        @media (max-width: 767px) {
            .timeline-wrapper::before {
                left: 24px;
            }
            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                flex-direction: row;
                margin-bottom: 40px;
            }
            .timeline-item .tl-content,
            .timeline-item:nth-child(odd) .tl-content,
            .timeline-item:nth-child(even) .tl-content {
                max-width: 100%;
                flex: 1;
                margin: 0 0 0 20px;
                text-align: left;
                padding: 18px 20px;
            }
            .timeline-item .tl-spacer,
            .timeline-item:nth-child(odd) .tl-spacer,
            .timeline-item:nth-child(even) .tl-spacer {
                display: none;
            }
            .timeline-item .tl-marker,
            .timeline-item:nth-child(odd) .tl-marker,
            .timeline-item:nth-child(even) .tl-marker {
                flex: 0 0 38px;
                width: 38px;
                height: 38px;
                font-size: 15px;
                border-width: 2.5px;
                order: 0;
                margin: 0;
            }
            .timeline-item:nth-child(odd) .tl-tags {
                justify-content: flex-start;
            }
            .tl-content .tl-title {
                font-size: 17px;
            }
        }

        /* ========== CAPABILITY CARDS ========== */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .capability-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .capability-card:hover {
            box-shadow: var(--ds-shadow-lg);
            border-color: var(--ds-border);
            transform: translateY(-3px);
        }
        .capability-card .cap-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--ds-radius);
            background: var(--ds-warm-bg3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--ds-gold);
            flex-shrink: 0;
        }
        .capability-card .cap-title {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
        }
        .capability-card .cap-desc {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 991px) {
            .capability-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 575px) {
            .capability-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== METRICS ROW ========== */
        .metrics-row {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .metric-item {
            text-align: center;
            flex: 1;
            min-width: 140px;
            padding: 20px;
        }
        .metric-item .metric-num {
            font-family: var(--ds-font-number);
            font-size: 48px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1.1;
        }
        .metric-item .metric-unit {
            font-size: 20px;
            font-weight: 600;
            color: var(--ds-gold);
        }
        .metric-item .metric-label {
            font-size: 15px;
            color: var(--ds-text-secondary);
            margin-top: 8px;
        }
        .ds-section-dark .metric-item .metric-label {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 575px) {
            .metrics-row {
                gap: 16px;
            }
            .metric-item .metric-num {
                font-size: 36px;
            }
        }

        /* ========== CASE CARDS ========== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--ds-shadow-lg);
            transform: translateY(-3px);
        }
        .case-card .case-img {
            height: 200px;
            overflow: hidden;
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover .case-img img {
            transform: scale(1.03);
        }
        .case-card .case-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .case-card .case-industry {
            font-size: 12px;
            font-weight: 600;
            color: var(--ds-gold);
            letter-spacing: 0.05em;
        }
        .case-card .case-title {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--ds-deep);
            line-height: 1.35;
        }
        .case-card .case-desc {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 767px) {
            .case-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ACCORDION ========== */
        .ds-accordion .accordion-item {
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius);
            margin-bottom: 10px;
            background: var(--ds-white);
            overflow: hidden;
        }
        .ds-accordion .accordion-button {
            font-family: var(--ds-font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-white);
            padding: 16px 20px;
            border: none;
            box-shadow: none;
            transition: all var(--ds-transition-fast);
        }
        .ds-accordion .accordion-button:not(.collapsed) {
            color: var(--ds-gold);
            background: var(--ds-warm-bg2);
            box-shadow: none;
        }
        .ds-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(176, 141, 87, 0.2);
            border-color: var(--ds-gold);
        }
        .ds-accordion .accordion-button::after {
            background-image: none;
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 13px;
            color: var(--ds-text-light);
            transition: transform var(--ds-transition-fast);
        }
        .ds-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--ds-gold);
        }
        .ds-accordion .accordion-body {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.8;
            padding: 16px 20px 20px;
            background: var(--ds-warm-bg2);
        }

        /* ========== CTA STRIP ========== */
        .ds-cta-strip {
            background: var(--ds-deep);
            padding: 40px 0;
            text-align: center;
        }
        .ds-cta-strip .cta-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
        }
        .ds-cta-strip .cta-text {
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-white);
        }
        .ds-cta-strip .cta-text span {
            color: var(--ds-gold-light);
        }
        @media (max-width: 575px) {
            .ds-cta-strip .cta-inner {
                flex-direction: column;
                gap: 16px;
            }
            .ds-cta-strip .cta-text {
                font-size: 18px;
            }
        }

        /* ========== RELATED SECTION ========== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            padding: 20px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            text-align: center;
        }
        .related-card:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
            transform: translateY(-2px);
        }
        .related-card .related-icon {
            font-size: 28px;
            color: var(--ds-gold);
            margin-bottom: 10px;
        }
        .related-card .related-title {
            font-family: var(--ds-font-heading);
            font-size: 16px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 4px;
        }
        .related-card .related-desc {
            font-size: 13px;
            color: var(--ds-text-light);
            line-height: 1.6;
        }
        @media (max-width: 767px) {
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }
        @media (max-width: 480px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            font-size: 14px;
            line-height: 1.7;
        }
        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 10px;
        }
        .ds-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.7;
        }
        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            margin-bottom: 14px;
        }
        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ds-footer ul li {
            margin-bottom: 8px;
        }
        .ds-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--ds-transition-fast);
            font-size: 14px;
        }
        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }
        .ds-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }
        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }
        @media (max-width: 991px) {
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 575px) {
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        /* ========== BACK TO TOP ========== */
        .back-to-top {
            position: fixed;
            bottom: 100px;
            right: 24px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--ds-deep);
            color: var(--ds-white);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            border: none;
            cursor: pointer;
            opacity: 0;
            transform: translateY(20px);
            transition: all var(--ds-transition);
            pointer-events: none;
            box-shadow: var(--ds-shadow-md);
        }
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .back-to-top:hover {
            background: var(--ds-gold);
            transform: translateY(-3px);
        }

/* roulang page: category7 */
:root {
            --ds-deep: #1A1A1A;
            --ds-deep2: #252525;
            --ds-deep3: #2F2F2F;
            --ds-gold: #B08D57;
            --ds-gold-hover: #9A7A48;
            --ds-gold-light: #C29B6D;
            --ds-warm-bg: #F5F1EA;
            --ds-warm-bg2: #F7F4F0;
            --ds-warm-bg3: #EDE8E0;
            --ds-white: #FFFFFF;
            --ds-text: #1A1A1A;
            --ds-text-secondary: #5C5C5C;
            --ds-text-light: #8A8A8A;
            --ds-border: #E0DCD5;
            --ds-border-light: #EBE7E0;
            --ds-radius: 8px;
            --ds-radius-sm: 6px;
            --ds-radius-lg: 10px;
            --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --ds-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --ds-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --ds-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --ds-font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --ds-font-number: "Helvetica Neue", Arial, sans-serif;
            --ds-transition: 0.25s ease-out;
            --ds-transition-fast: 0.18s ease-out;
            --ds-section-gap: 80px;
            --ds-section-gap-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--ds-font-body);
            font-weight: 400;
            line-height: 1.75;
            color: var(--ds-text);
            background-color: var(--ds-warm-bg);
            overflow-x: hidden;
            padding-top: 72px;
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ds-transition-fast);
        }

        a:hover {
            color: var(--ds-gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== NAVIGATION ========== */
        .ds-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ds-nav.scrolled {
            height: 60px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ds-border);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-nav .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .ds-nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-deep);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--ds-transition-fast);
        }

        .ds-nav-logo:hover {
            color: var(--ds-gold);
        }

        .ds-nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ds-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ds-gold-light);
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            transition: background var(--ds-transition-fast);
        }

        .ds-nav-logo:hover .logo-icon {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .ds-nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ds-text);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .ds-nav-links li a:hover,
        .ds-nav-links li a.active {
            color: var(--ds-gold);
        }

        .ds-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ds-gold);
            border-radius: 1px;
        }

        .ds-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ds-white);
            background: var(--ds-deep);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            white-space: nowrap;
            border: none;
        }

        .ds-nav-cta:hover {
            background: var(--ds-gold);
            color: var(--ds-white);
        }

        .ds-nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1060;
        }

        .ds-nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--ds-deep);
            border-radius: 2px;
            transition: all var(--ds-transition-fast);
        }

        .ds-nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .ds-nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .ds-nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== BREADCRUMB ========== */
        .ds-breadcrumb {
            padding: 24px 0 16px;
            font-size: 14px;
            color: var(--ds-text-light);
        }

        .ds-breadcrumb a {
            color: var(--ds-text-secondary);
            transition: color var(--ds-transition-fast);
        }

        .ds-breadcrumb a:hover {
            color: var(--ds-gold);
        }

        .ds-breadcrumb .separator {
            margin: 0 8px;
            color: var(--ds-border);
        }

        .ds-breadcrumb .current {
            color: var(--ds-gold);
            font-weight: 500;
        }

        /* ========== PAGE BANNER ========== */
        .ds-page-banner {
            background: linear-gradient(135deg, var(--ds-deep2) 0%, var(--ds-deep) 100%);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 320px;
            display: flex;
            align-items: center;
            position: relative;
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            margin-bottom: 48px;
        }

        .ds-page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 26, 26, 0.7);
            z-index: 1;
        }

        .ds-page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 56px 48px;
            max-width: 700px;
        }

        .ds-page-banner .banner-content h1 {
            font-family: var(--ds-font-heading);
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--ds-white);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .ds-page-banner .banner-content h1 .gold-accent {
            color: var(--ds-gold-light);
        }

        .ds-page-banner .banner-content .banner-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 560px;
        }

        /* ========== SECTION STYLES ========== */
        .ds-section {
            padding: 48px 0;
        }

        .ds-section-alt {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 56px 40px;
            margin: 32px 0;
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-section-deep {
            background: var(--ds-deep);
            border-radius: var(--ds-radius-lg);
            padding: 56px 40px;
            margin: 32px 0;
            color: var(--ds-white);
        }

        .ds-section-title {
            font-family: var(--ds-font-heading);
            font-size: 32px;
            font-weight: 700;
            color: var(--ds-deep);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }

        .ds-section-title.light {
            color: var(--ds-white);
        }

        .ds-section-subtitle {
            font-size: 16px;
            color: var(--ds-text-secondary);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 680px;
        }

        .ds-section-subtitle.light {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== INTRO TEXT BLOCK ========== */
        .ds-intro-text {
            font-size: 16px;
            line-height: 1.85;
            color: var(--ds-text-secondary);
            max-width: 860px;
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 36px 40px;
            border-left: 4px solid var(--ds-gold);
            box-shadow: var(--ds-shadow-sm);
        }

        /* ========== DATA ROW ========== */
        .ds-data-row {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        .ds-data-item {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-data-item:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-3px);
        }

        .ds-data-item .data-number {
            font-family: var(--ds-font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--ds-gold);
            line-height: 1;
            margin-bottom: 8px;
        }

        .ds-data-item .data-label {
            font-size: 14px;
            color: var(--ds-text-secondary);
            font-weight: 500;
        }

        /* ========== SERVICE COMPOSITE ========== */
        .ds-composite-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }

        .ds-composite-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            padding: 32px;
            border: 1px solid var(--ds-border-light);
            box-shadow: var(--ds-shadow-sm);
            transition: all var(--ds-transition-fast);
        }

        .ds-composite-card:hover {
            box-shadow: var(--ds-shadow-md);
            border-color: var(--ds-gold-light);
        }

        .ds-composite-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--ds-warm-bg3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--ds-gold);
            margin-bottom: 16px;
        }

        .ds-composite-card h4 {
            font-family: var(--ds-font-heading);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--ds-deep);
        }

        .ds-composite-card p {
            font-size: 15px;
            color: var(--ds-text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== ADVANTAGE LIST ========== */
        .ds-advantage-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-advantage-list .adv-item {
            padding: 36px 32px;
            border-bottom: 1px solid var(--ds-border-light);
            border-right: 1px solid var(--ds-border-light);
            transition: background var(--ds-transition-fast);
        }

        .ds-advantage-list .adv-item:nth-child(even) {
            border-right: none;
        }

        .ds-advantage-list .adv-item:nth-last-child(-n+2) {
            border-bottom: none;
        }

        .ds-advantage-list .adv-item:hover {
            background: var(--ds-warm-bg2);
        }

        .ds-advantage-list .adv-num {
            font-family: var(--ds-font-number);
            font-size: 28px;
            font-weight: 700;
            color: var(--ds-gold);
            margin-bottom: 8px;
        }

        .ds-advantage-list .adv-item h4 {
            font-family: var(--ds-font-heading);
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--ds-deep);
        }

        .ds-advantage-list .adv-item p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ========== STEPS TIMELINE ========== */
        .ds-steps {
            display: flex;
            gap: 0;
            position: relative;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: 8px 0;
        }

        .ds-step-item {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 0 16px;
        }

        .ds-step-item .step-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--ds-gold);
            color: var(--ds-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ds-font-number);
            font-size: 22px;
            font-weight: 700;
            margin: 0 auto 16px;
            position: relative;
            z-index: 2;
            transition: all var(--ds-transition-fast);
        }

        .ds-step-item:hover .step-circle {
            background: var(--ds-deep);
            transform: scale(1.08);
        }

        .ds-step-item .step-line {
            position: absolute;
            top: 28px;
            left: 50%;
            right: -50%;
            height: 2px;
            background: var(--ds-border);
            z-index: 1;
        }

        .ds-step-item:last-child .step-line {
            display: none;
        }

        .ds-step-item h4 {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--ds-deep);
        }

        .ds-step-item p {
            font-size: 13px;
            color: var(--ds-text-secondary);
            line-height: 1.55;
            margin: 0;
        }

        /* ========== FAQ ACCORDION ========== */
        .ds-faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .ds-faq-accordion .accordion-item {
            background: var(--ds-white);
            border: 1px solid var(--ds-border-light);
            border-radius: var(--ds-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--ds-shadow-sm);
            transition: all var(--ds-transition-fast);
        }

        .ds-faq-accordion .accordion-item:hover {
            box-shadow: var(--ds-shadow-md);
        }

        .ds-faq-accordion .accordion-button {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-white);
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            transition: all var(--ds-transition-fast);
            border-radius: var(--ds-radius) !important;
        }

        .ds-faq-accordion .accordion-button:not(.collapsed) {
            background: var(--ds-warm-bg2);
            color: var(--ds-gold);
            box-shadow: none;
            border-bottom: 1px solid var(--ds-border-light);
        }

        .ds-faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 2px var(--ds-gold-light);
            border-color: var(--ds-gold);
            z-index: 3;
        }

        .ds-faq-accordion .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 22px;
            font-weight: 300;
            color: var(--ds-gold);
            width: auto;
            height: auto;
            line-height: 1;
            transition: transform var(--ds-transition-fast);
        }

        .ds-faq-accordion .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: rotate(0deg);
        }

        .ds-faq-accordion .accordion-body {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ds-text-secondary);
            padding: 24px;
            background: var(--ds-white);
        }

        /* ========== CASE DISPLAY ========== */
        .ds-case-row {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }

        .ds-case-card {
            background: var(--ds-white);
            border-radius: var(--ds-radius-lg);
            overflow: hidden;
            border: 1px solid var(--ds-border-light);
            box-shadow: var(--ds-shadow-sm);
            transition: all var(--ds-transition-fast);
        }

        .ds-case-card:hover {
            box-shadow: var(--ds-shadow-lg);
            transform: translateY(-4px);
            border-color: var(--ds-gold-light);
        }

        .ds-case-card .case-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }

        .ds-case-card .case-body {
            padding: 20px;
        }

        .ds-case-card .case-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--ds-warm-bg3);
            color: var(--ds-gold);
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .ds-case-card h4 {
            font-family: var(--ds-font-heading);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--ds-deep);
        }

        .ds-case-card p {
            font-size: 14px;
            color: var(--ds-text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== CTA BLOCK ========== */
        .ds-cta-block {
            background: var(--ds-deep);
            border-radius: var(--ds-radius-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--ds-shadow-lg);
        }

        .ds-cta-block h3 {
            font-family: var(--ds-font-heading);
            font-size: 28px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
        }

        .ds-cta-block p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .ds-btn-gold {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-deep);
            background: var(--ds-gold);
            border-radius: var(--ds-radius-sm);
            border: none;
            transition: all var(--ds-transition-fast);
            cursor: pointer;
        }

        .ds-btn-gold:hover {
            background: var(--ds-gold-hover);
            color: var(--ds-deep);
            transform: translateY(-2px);
            box-shadow: var(--ds-shadow-md);
        }

        .ds-btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-white);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--ds-radius-sm);
            transition: all var(--ds-transition-fast);
            cursor: pointer;
            margin-left: 12px;
        }

        .ds-btn-outline-light:hover {
            border-color: var(--ds-gold-light);
            color: var(--ds-gold-light);
            background: rgba(255, 255, 255, 0.05);
        }

        /* ========== RELATED SECTION ========== */
        .ds-related-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 20px;
        }

        .ds-related-item {
            background: var(--ds-white);
            border-radius: var(--ds-radius);
            padding: 24px;
            border: 1px solid var(--ds-border-light);
            transition: all var(--ds-transition-fast);
            box-shadow: var(--ds-shadow-sm);
        }

        .ds-related-item:hover {
            border-color: var(--ds-gold-light);
            box-shadow: var(--ds-shadow-md);
            transform: translateY(-2px);
        }

        .ds-related-item h5 {
            font-family: var(--ds-font-heading);
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--ds-deep);
        }

        .ds-related-item p {
            font-size: 13px;
            color: var(--ds-text-secondary);
            margin: 0;
            line-height: 1.55;
        }

        .ds-related-item .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--ds-gold);
            margin-top: 10px;
            transition: gap var(--ds-transition-fast);
        }

        .ds-related-item .arrow-link:hover {
            gap: 8px;
            color: var(--ds-gold-hover);
        }

        /* ========== BACK TO HOME ========== */
        .ds-back-home {
            text-align: center;
            padding: 32px 0;
        }

        .ds-back-home a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ds-gold);
            transition: all var(--ds-transition-fast);
        }

        .ds-back-home a:hover {
            color: var(--ds-gold-hover);
            gap: 10px;
        }

        /* ========== FOOTER ========== */
        .ds-footer {
            background: var(--ds-deep2);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 28px;
            margin-top: 48px;
            border-radius: var(--ds-radius-lg) var(--ds-radius-lg) 0 0;
        }

        .ds-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .ds-footer .footer-brand {
            font-family: var(--ds-font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 12px;
        }

        .ds-footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }

        .ds-footer h5 {
            font-family: var(--ds-font-heading);
            font-size: 15px;
            font-weight: 700;
            color: var(--ds-white);
            margin-bottom: 14px;
        }

        .ds-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ds-footer ul li {
            margin-bottom: 8px;
        }

        .ds-footer ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer ul li a:hover {
            color: var(--ds-gold-light);
        }

        .ds-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .ds-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ds-transition-fast);
        }

        .ds-footer .footer-bottom a:hover {
            color: var(--ds-gold-light);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 991px) {
            .ds-page-banner .banner-content h1 {
                font-size: 34px;
            }
            .ds-page-banner .banner-content {
                padding: 40px 28px;
            }
            .ds-data-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .ds-composite-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ds-advantage-list {
                grid-template-columns: 1fr;
            }
            .ds-advantage-list .adv-item {
                border-right: none;
            }
            .ds-advantage-list .adv-item:nth-last-child(-n+1) {
                border-bottom: none;
            }
            .ds-case-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .ds-related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .ds-steps {
                flex-wrap: wrap;
                gap: 24px;
            }
            .ds-step-item {
                flex: 0 0 calc(50% - 12px);
                min-width: auto;
            }
            .ds-step-item .step-line {
                display: none;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .ds-section-alt,
            .ds-section-deep {
                padding: 36px 24px;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .ds-nav {
                height: 60px;
            }
            .ds-nav .nav-container {
                padding: 0 16px;
            }
            .ds-nav-links {
                display: none;
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--ds-deep);
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
                gap: 4px;
                z-index: 1040;
                overflow-y: auto;
            }
            .ds-nav-links.open {
                display: flex;
            }
            .ds-nav-links li a {
                color: rgba(255, 255, 255, 0.85);
                font-size: 18px;
                padding: 14px 16px;
                width: 100%;
                border-radius: var(--ds-radius-sm);
            }
            .ds-nav-links li a:hover,
            .ds-nav-links li a.active {
                color: var(--ds-gold-light);
                background: rgba(255, 255, 255, 0.05);
            }
            .ds-nav-links li a.active::after {
                display: none;
            }
            .ds-nav-hamburger {
                display: flex;
            }
            .ds-nav-cta.desktop-only {
                display: none;
            }
            .ds-page-banner {
                min-height: 240px;
                border-radius: var(--ds-radius);
            }
            .ds-page-banner .banner-content {
                padding: 28px 20px;
            }
            .ds-page-banner .banner-content h1 {
                font-size: 28px;
            }
            .ds-page-banner .banner-content .banner-sub {
                font-size: 15px;
            }
            .ds-breadcrumb {
                padding: 16px 0 10px;
                font-size: 13px;
            }
            .ds-section {
                padding: 32px 0;
            }
            .ds-section-title {
                font-size: 26px;
            }
            .ds-intro-text {
                padding: 24px 20px;
                font-size: 15px;
            }
            .ds-data-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .ds-data-item {
                padding: 20px 14px;
            }
            .ds-data-item .data-number {
                font-size: 30px;
            }
            .ds-composite-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .ds-advantage-list {
                grid-template-columns: 1fr;
            }
            .ds-advantage-list .adv-item {
                padding: 24px 20px;
            }
            .ds-case-row {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .ds-related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .ds-steps {
                flex-direction: column;
                gap: 20px;
            }
            .ds-step-item {
                flex: 1;
                min-width: auto;
                text-align: left;
                display: flex;
                align-items: flex-start;
                gap: 16px;
                padding: 0;
            }
            .ds-step-item .step-circle {
                flex-shrink: 0;
                margin: 0;
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
            .ds-step-item .step-line {
                display: none;
            }
            .ds-cta-block {
                padding: 32px 20px;
            }
            .ds-cta-block h3 {
                font-size: 22px;
            }
            .ds-btn-outline-light {
                margin-left: 0;
                margin-top: 10px;
            }
            .ds-footer {
                padding: 36px 0 20px;
                border-radius: var(--ds-radius) var(--ds-radius) 0 0;
            }
            .ds-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ds-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                font-size: 12px;
            }
            .ds-section-alt,
            .ds-section-deep {
                padding: 28px 16px;
                border-radius: var(--ds-radius);
            }
            .ds-faq-accordion .accordion-button {
                font-size: 15px;
                padding: 16px 18px;
            }
            .ds-faq-accordion .accordion-body {
                font-size: 14px;
                padding: 18px;
            }
        }

        @media (max-width: 520px) {
            .ds-data-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .ds-data-item .data-number {
                font-size: 26px;
            }
            .ds-data-item .data-label {
                font-size: 12px;
            }
            .ds-page-banner .banner-content h1 {
                font-size: 24px;
            }
            .ds-page-banner {
                min-height: 200px;
            }
            .ds-related-grid {
                grid-template-columns: 1fr;
            }
        }