/* roulang page: index */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: var(--section-padding);
        }

        .section-padding-sm {
            padding: 64px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }

        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

        .text-accent-cyan {
            color: var(--accent-cyan);
        }
        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
        }

        .nav-brand span {
            color: var(--accent-cyan);
        }

        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }

        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }

        .nav-link-custom:hover {
            color: var(--text-primary);
        }
        .nav-link-custom:hover::after {
            right: 10px;
        }
        .nav-link-custom.active {
            color: var(--accent-cyan);
        }
        .nav-link-custom.active::after {
            right: 10px;
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            color: var(--text-secondary);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 10, 12, 0.98);
            padding: 16px 24px 24px;
            border-top: 1px solid var(--border-default);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            z-index: 2000;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link-custom {
            padding: 12px 0;
            font-size: 1rem;
            border-bottom: 1px solid var(--border-default);
            width: 100%;
            text-align: left;
        }
        .mobile-menu .nav-link-custom:last-child {
            border-bottom: none;
        }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            background: var(--bg-primary);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.38;
            z-index: 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 30% 40%, rgba(10, 10, 12, 0.55) 0%, rgba(10, 10, 12, 0.92) 75%),
                linear-gradient(180deg, rgba(10, 10, 12, 0.55) 0%, rgba(10, 10, 12, 0.85) 50%, rgba(10, 10, 12, 0.95) 100%);
            z-index: 1;
        }

        .hero-grain {
            position: absolute;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            opacity: 0.12;
            background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23n)' opacity='0.6'/%3E%3C/svg%3E");
        }

        .hero-content {
            position: relative;
            z-index: 5;
            width: 100%;
        }

        .hero-top {
            text-align: center;
            margin-bottom: 48px;
        }

        .hero-live-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.4);
            background: rgba(0, 229, 255, 0.08);
            padding: 6px 14px;
            border-radius: 100px;
            margin-bottom: 20px;
        }

        .hero-live-tag .live-dot {
            width: 7px;
            height: 7px;
            background: var(--accent-cyan);
            border-radius: 50%;
            animation: live-pulse 1.6s ease-in-out infinite;
        }

        @keyframes live-pulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.6);
            }
            50% {
                box-shadow: 0 0 0 5px rgba(0, 229, 255, 0);
            }
        }

        .hero-title {
            font-size: clamp(38px, 5.5vw, 68px);
            font-weight: 900;
            letter-spacing: -0.035em;
            line-height: 1.08;
            color: var(--text-primary);
            margin-bottom: 20px;
            text-shadow: 0 6px 40px rgba(0, 0, 0, 0.6);
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.4vw, 1.15rem);
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin: 0 auto 24px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-bottom: 12px;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.04em;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--accent-cyan);
            transition: var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary-custom:hover {
            background: #3dedff;
            color: #0A0A0C;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.55);
            transform: translateY(-2px);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.04em;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.35);
            transition: var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-outline-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            transform: translateY(-2px);
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-top: 16px;
        }

        .hero-metric-item {
            text-align: center;
        }

        .hero-metric-item .metric-num {
            font-family: var(--font-display);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-amber);
            letter-spacing: -0.01em;
        }

        .hero-metric-item .metric-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        /* Hero 对比卡片 */
        .hero-compare-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            margin-top: 16px;
        }

        .compare-card {
            background: rgba(20, 20, 25, 0.82);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            position: relative;
            transition: var(--transition-smooth);
            backdrop-filter: blur(10px);
        }

        .compare-card:hover {
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .compare-card.featured {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.07);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.18);
        }

        .compare-card .badge-recommend {
            position: absolute;
            top: -11px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            padding: 4px 14px;
            border-radius: 100px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .compare-card .plan-name {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .compare-card .plan-price {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .compare-card .plan-price span {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 400;
            font-family: var(--font-sans);
        }

        .compare-card .plan-features {
            list-style: none;
            padding: 0;
            margin: 0 0 18px;
        }

        .compare-card .plan-features li {
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-card .plan-features li i {
            color: var(--accent-cyan);
            font-size: 0.75rem;
            flex-shrink: 0;
        }

        .compare-card .btn-plan {
            width: 100%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.88rem;
            padding: 11px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
            cursor: pointer;
            border: 1px solid var(--border-default);
            background: transparent;
            color: var(--text-secondary);
        }

        .compare-card .btn-plan:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .compare-card.featured .btn-plan {
            background: var(--accent-cyan);
            color: #0A0A0C;
            border-color: var(--accent-cyan);
            font-weight: 700;
        }

        .compare-card.featured .btn-plan:hover {
            background: #3dedff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
        }

        /* ========== 佣金亮点 ========== */
        .commission-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, #101015 50%, var(--bg-primary) 100%);
            position: relative;
            overflow: hidden;
        }

        .commission-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 900px;
            height: 500px;
            background: radial-gradient(ellipse, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .commission-band {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            padding: 56px 0;
        }

        .commission-item {
            text-align: center;
            padding: 24px 16px;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            background: rgba(20, 20, 25, 0.6);
            transition: var(--transition-base);
        }

        .commission-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: var(--shadow-soft);
        }

        .commission-item .comm-num {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--accent-amber);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .commission-item .comm-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .commission-item .comm-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== 推广物料 ========== */
        .assets-section {
            background: var(--bg-secondary);
        }

        .assets-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .asset-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
            position: relative;
        }

        .asset-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .asset-card .asset-num {
            position: absolute;
            top: 12px;
            left: 14px;
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.15);
            z-index: 3;
            line-height: 1;
        }

        .asset-card .asset-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

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

        .asset-card:hover .asset-img-wrap img {
            transform: scale(1.05);
        }

        .asset-card .asset-img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 10, 12, 0.85) 100%);
            z-index: 2;
        }

        .asset-card .asset-body {
            padding: 18px 18px 20px;
        }

        .asset-card .asset-title {
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .asset-card .asset-desc {
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .asset-card .asset-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.3);
            background: rgba(0, 229, 255, 0.06);
            padding: 3px 10px;
            border-radius: 100px;
            letter-spacing: 0.06em;
        }

        /* ========== 价格对比 ========== */
        .pricing-compare-section {
            background: var(--bg-primary);
        }

        .pricing-table-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-soft);
        }

        .pricing-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }

        .pricing-table th,
        .pricing-table td {
            padding: 18px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-default);
        }

        .pricing-table th {
            background: var(--bg-elevated);
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.88rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .pricing-table td {
            color: var(--text-secondary);
            vertical-align: middle;
        }

        .pricing-table tr:last-child td {
            border-bottom: none;
        }

        .pricing-table .col-ours {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .pricing-table .col-regular {
            color: var(--text-muted);
        }

        .pricing-table .check-icon {
            color: var(--accent-cyan);
            margin-right: 6px;
        }
        .pricing-table .cross-icon {
            color: var(--accent-magenta);
            margin-right: 6px;
            opacity: 0.7;
        }

        /* ========== 焦点主题 ========== */
        .topics-section {
            background: var(--bg-secondary);
        }

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

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .topic-card .topic-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .topic-card .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .topic-card:hover .topic-img img {
            transform: scale(1.05);
        }

        .topic-card .topic-body {
            padding: 20px;
        }

        .topic-card .topic-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .topic-card .topic-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 10px;
        }

        .topic-card .topic-link {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== 精选分类 ========== */
        .categories-section {
            background: var(--bg-primary);
        }

        .cat-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .cat-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 9px 18px;
            border: 1px solid var(--border-default);
            border-radius: 100px;
            background: transparent;
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .cat-tab:hover,
        .cat-tab.active {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
        }

        .cat-preview-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .cat-preview-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: var(--transition-base);
            display: block;
        }

        .cat-preview-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
            transform: translateY(-3px);
        }
        .cat-preview-card:hover .cat-preview-title {
            color: var(--accent-cyan);
        }

        .cat-preview-card .cat-icon {
            font-size: 1.5rem;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .cat-preview-card .cat-preview-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            transition: var(--transition-base);
        }
        .cat-preview-card .cat-preview-desc {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== 资讯 ========== */
        .news-section {
            background: var(--bg-secondary);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 32px;
        }

        .news-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .news-list-item {
            display: flex;
            align-items: baseline;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
            cursor: pointer;
        }
        .news-list-item:hover .news-list-title {
            color: var(--accent-cyan);
        }
        .news-list-item:first-child {
            padding-top: 0;
        }
        .news-list-item:last-child {
            border-bottom: none;
        }

        .news-list-item .news-index {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-amber);
            flex-shrink: 0;
            width: 32px;
        }

        .news-list-item .news-main {
            flex: 1;
        }

        .news-list-item .news-list-title {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition-base);
            display: block;
            line-height: 1.5;
        }

        .news-list-item .news-meta {
            font-size: 0.76rem;
            color: var(--text-muted);
            margin-top: 4px;
            display: flex;
            gap: 14px;
        }

        .news-recommend {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-recommend-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            display: block;
        }

        .news-recommend-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
        }

        .news-recommend-card .rec-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .news-recommend-card .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-recommend-card:hover .rec-img img {
            transform: scale(1.04);
        }
        .news-recommend-card .rec-body {
            padding: 14px 16px 16px;
        }
        .news-recommend-card .rec-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .news-recommend-card .rec-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-primary);
        }

        .accordion-custom {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion-custom .accordion-item {
            background: transparent;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
        }

        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 20px;
            border: none;
            border-radius: 0;
            transition: var(--transition-base);
            position: relative;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(70%) sepia(50%) saturate(500%) hue-rotate(150deg);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 229, 255, 0.06);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
            padding: 16px 20px 20px;
        }

        /* ========== CTA / 加入入口 ========== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: var(--bg-primary);
            overflow: hidden;
        }

        .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            z-index: 0;
        }

        .cta-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(10, 10, 12, 0.55) 0%, rgba(10, 10, 12, 0.94) 85%);
            z-index: 1;
        }

        .cta-content {
            position: relative;
            z-index: 5;
        }

        .cta-form-wrap {
            background: rgba(20, 20, 25, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            max-width: 520px;
            margin-left: auto;
        }

        .cta-form-wrap .form-label {
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 5px;
        }

        .cta-form-wrap .form-control,
        .cta-form-wrap .form-select {
            background: rgba(10, 10, 12, 0.7);
            border: 1px solid var(--border-default);
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            transition: var(--transition-base);
        }

        .cta-form-wrap .form-control:focus,
        .cta-form-wrap .form-select:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
            background: rgba(10, 10, 12, 0.9);
            color: var(--text-primary);
        }

        .cta-form-wrap .form-control::placeholder {
            color: var(--text-muted);
        }

        .cta-form-wrap .btn-submit {
            width: 100%;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.06em;
            padding: 13px 20px;
            border: none;
            border-radius: var(--radius-sm);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .cta-form-wrap .btn-submit:hover {
            background: #3dedff;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #060608;
            border-top: 1px solid var(--border-default);
            padding: 48px 0 32px;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-links-group h5 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .footer-links-group a {
            display: block;
            font-size: 0.86rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: var(--transition-base);
        }
        .footer-links-group a:hover {
            color: var(--accent-cyan);
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-default);
            margin-top: 32px;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .navbar-toggler-custom {
                display: block;
            }
            .navbar-custom {
                justify-content: space-between;
            }
            .nav-brand {
                font-size: 1.4rem;
            }

            .hero-section {
                padding: 130px 0 60px;
            }
            .hero-compare-row {
                grid-template-columns: 1fr;
                gap: 14px;
                margin-top: 8px;
            }
            .compare-card.featured {
                order: -1;
            }
            .assets-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-preview-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .commission-band {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .cta-form-wrap {
                max-width: 100%;
                margin-left: 0;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: var(--section-padding-mobile);
            }
            .section-padding-sm {
                padding: 48px 0;
            }
            .hero-section {
                min-height: auto;
                padding: 120px 0 48px;
            }
            .hero-title {
                font-size: clamp(30px, 7vw, 40px);
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                justify-content: center;
            }
            .hero-metrics {
                gap: 18px;
            }
            .hero-metric-item .metric-num {
                font-size: 1.4rem;
            }
            .assets-grid {
                grid-template-columns: 1fr;
            }
            .topics-grid {
                grid-template-columns: 1fr;
            }
            .cat-preview-grid {
                grid-template-columns: 1fr;
            }
            .cat-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 8px;
                gap: 8px;
            }
            .commission-band {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .commission-item .comm-num {
                font-size: 2rem;
            }
            .pricing-table th,
            .pricing-table td {
                padding: 12px 10px;
                font-size: 0.82rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-form-wrap {
                padding: 24px 18px;
            }
            .navbar-custom {
                padding: 0 16px;
                min-height: 62px;
            }
        }

        @media (max-width: 519.98px) {
            .hero-title {
                font-size: 28px;
                letter-spacing: -0.01em;
            }
            .hero-live-tag {
                font-size: 0.68rem;
                padding: 5px 10px;
            }
            .commission-band {
                grid-template-columns: 1fr;
            }
            .compare-card {
                padding: 20px 16px;
            }
            .compare-card .plan-price {
                font-size: 1.6rem;
            }
            .news-list-item {
                flex-direction: column;
                gap: 4px;
            }
            .news-list-item .news-index {
                width: auto;
            }
            .section-title {
                font-size: 24px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
            margin: 0;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-sans);
            color: var(--text-primary);
            margin-top: 0;
            line-height: 1.35;
        }

        p {
            margin-top: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-padding {
            padding: var(--section-padding);
        }

        .section-padding-sm {
            padding: 64px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }

        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

        .text-accent-cyan {
            color: var(--accent-cyan);
        }

        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
        }

        .nav-brand span {
            color: var(--accent-cyan);
        }

        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }

        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }

        .nav-link-custom:hover {
            color: var(--text-primary);
        }

        .nav-link-custom:hover::after {
            right: 10px;
        }

        .nav-link-custom.active {
            color: var(--accent-cyan);
        }

        .nav-link-custom.active::after {
            right: 10px;
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* ========== Sub Hero ========== */
        .sub-hero {
            position: relative;
            min-height: 46vh;
            display: flex;
            align-items: flex-end;
            padding: 140px 0 64px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .sub-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 12, 0.55) 0%, rgba(10, 10, 12, 0.82) 60%, var(--bg-primary) 100%);
            z-index: 1;
        }

        .sub-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 229, 255, 0.08) 0%, transparent 60%);
            z-index: 1;
        }

        .sub-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-custom .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb-custom .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .sub-hero-title {
            font-size: clamp(32px, 4vw, 52px);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        .sub-hero-desc {
            font-size: 1.08rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin-bottom: 0;
        }

        .sub-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 229, 255, 0.12);
            border: 1px solid rgba(0, 229, 255, 0.3);
            color: var(--accent-cyan);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: 0.06em;
        }

        .sub-hero-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--accent-cyan);
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }

        /* ========== Tech Modules ========== */
        .tech-modules {
            background: var(--bg-secondary);
            position: relative;
        }

        .tech-modules::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.25), transparent);
        }

        .module-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
            cursor: default;
        }

        .module-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), rgba(0, 229, 255, 0.3));
            opacity: 0;
            transition: var(--transition-base);
        }

        .module-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .module-card:hover::before {
            opacity: 1;
        }

        .module-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.2);
            color: var(--accent-cyan);
            font-size: 1.25rem;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }

        .module-card:hover .module-icon {
            background: rgba(0, 229, 255, 0.16);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }

        .module-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .module-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .module-card .module-tag {
            display: inline-block;
            font-size: 0.72rem;
            color: var(--accent-amber);
            font-weight: 600;
            letter-spacing: 0.08em;
            margin-top: 12px;
            text-transform: uppercase;
        }

        /* ========== Deployment Process ========== */
        .deployment-process {
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .deployment-process::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.05) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .deployment-process .container {
            position: relative;
            z-index: 1;
        }

        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            position: relative;
            transition: var(--transition-base);
        }

        .process-step:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
        }

        .process-number {
            font-family: var(--font-display);
            font-size: 3.2rem;
            font-weight: 700;
            color: rgba(0, 229, 255, 0.15);
            line-height: 1;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            transition: var(--transition-base);
        }

        .process-step:hover .process-number {
            color: rgba(0, 229, 255, 0.4);
        }

        .process-step h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .process-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            opacity: 0.5;
            height: 100%;
        }

        /* ========== Scenarios ========== */
        .scenarios {
            background: var(--bg-secondary);
            position: relative;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-base);
            cursor: default;
        }

        .scenario-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

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

        .scenario-body {
            padding: 20px 20px 24px;
        }

        .scenario-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .scenario-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .scenario-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .scenario-meta .badge-scenario {
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: var(--accent-cyan);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
            letter-spacing: 0.04em;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-primary);
            position: relative;
        }

        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 179, 0, 0.2), transparent);
        }

        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }

        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 20px;
            box-shadow: none;
            border: none;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg-card);
            color: var(--accent-cyan);
            border-bottom: 1px solid var(--border-default);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(1) brightness(1.5);
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            filter: invert(0.8) sepia(1) saturate(5) hue-rotate(120deg);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-hover);
        }

        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
            padding: 18px 20px 22px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 96px 0;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 12, 0.85) 0%, rgba(10, 10, 12, 0.92) 100%);
            z-index: 1;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.12) 0%, transparent 65%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-panel {
            background: rgba(20, 20, 25, 0.92);
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            max-width: 680px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
        }

        .cta-panel h2 {
            font-size: clamp(24px, 2.5vw, 32px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .cta-panel p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        .btn-primary-custom:hover {
            background: #33EAFF;
            color: #0A0A0C;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        .btn-secondary-custom:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 64px 0 24px;
        }

        .site-footer .footer-brand {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand span {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-links-group h5 {
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-primary);
            margin-bottom: 16px;
            opacity: 0.8;
        }

        .footer-links-group a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .footer-links-group a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-default);
            margin-top: 48px;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== Pagination ========== */
        .pagination-custom {
            display: flex;
            gap: 6px;
            justify-content: center;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .pagination-custom .page-link-custom:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }

        .pagination-custom .page-link-custom.active-page {
            background: var(--accent-cyan);
            border-color: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .navbar-custom {
                justify-content: space-between;
                padding: 0 16px;
            }

            .navbar-toggler-custom {
                display: block;
            }

            .navbar-custom .nav-brand {
                margin-right: auto;
            }

            .mobile-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(10, 10, 12, 0.98);
                border-bottom: 1px solid var(--border-default);
                padding: 16px 24px;
                flex-direction: column;
                gap: 4px;
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                z-index: 1060;
            }

            .mobile-nav.is-open {
                display: flex;
            }

            .mobile-nav .nav-link-custom {
                padding: 12px 0;
                font-size: 0.95rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            }

            .mobile-nav .nav-link-custom:last-child {
                border-bottom: none;
            }

            .sub-hero {
                min-height: 40vh;
                padding: 120px 0 48px;
            }

            .cta-panel {
                padding: 32px 24px;
            }

            .process-arrow {
                display: none;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --section-padding: var(--section-padding-mobile);
            }

            .section-padding {
                padding: var(--section-padding);
            }

            .sub-hero {
                min-height: 35vh;
                padding: 110px 0 40px;
            }

            .sub-hero-title {
                font-size: 28px;
            }

            .sub-hero-desc {
                font-size: 0.92rem;
            }

            .breadcrumb-custom {
                font-size: 0.75rem;
            }

            .module-card,
            .process-step,
            .scenario-card {
                margin-bottom: 16px;
            }

            .cta-panel {
                padding: 24px 20px;
            }

            .cta-panel h2 {
                font-size: 22px;
            }

            .btn-primary-custom,
            .btn-secondary-custom {
                width: 100%;
                justify-content: center;
                margin-bottom: 8px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .pagination-custom .page-link-custom {
                min-width: 34px;
                height: 34px;
                font-size: 0.78rem;
                padding: 0 8px;
            }
        }

        @media (min-width: 992px) {
            .mobile-nav {
                display: none !important;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-title {
                font-size: 24px;
            }

            .section-desc {
                font-size: 0.92rem;
            }

            .sub-hero {
                min-height: 30vh;
                padding: 100px 0 32px;
            }

            .sub-hero-title {
                font-size: 24px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: var(--section-padding);
        }
        .section-padding-sm {
            padding: 72px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }
        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

        .text-accent-cyan {
            color: var(--accent-cyan);
        }
        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
            padding-right: 16px;
        }
        .nav-right {
            justify-content: flex-start;
            padding-left: 16px;
        }
        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
            flex-shrink: 0;
        }
        .nav-brand span {
            color: var(--accent-cyan);
        }
        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }
        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }
        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }
        .nav-link-custom:hover {
            color: var(--text-primary);
        }
        .nav-link-custom:hover::after {
            right: 10px;
        }
        .nav-link-custom.active {
            color: var(--accent-cyan);
        }
        .nav-link-custom.active::after {
            right: 10px;
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition-base);
            align-items: center;
            justify-content: center;
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .mobile-nav-collapse {
            display: none;
            background: rgba(10, 10, 12, 0.98);
            border-bottom: 1px solid var(--border-default);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-collapse.show {
            display: flex;
        }
        .mobile-nav-collapse .nav-link-custom {
            padding: 12px 8px;
            border-bottom: 1px solid var(--border-default);
            font-size: 1rem;
        }
        .mobile-nav-collapse .nav-link-custom:last-child {
            border-bottom: none;
        }

        /* ========== Sub-Hero ========== */
        .sub-hero {
            position: relative;
            min-height: 48vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            margin-top: 72px;
        }
        .sub-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,10,12,0.55) 0%, rgba(10,10,12,0.8) 60%, rgba(10,10,12,0.95) 100%);
            z-index: 1;
        }
        .sub-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0,229,255,0.08) 0%, transparent 65%);
            z-index: 1;
        }
        .sub-hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 0 60px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb-custom .current {
            color: var(--accent-cyan);
        }
        .sub-hero-title {
            font-size: clamp(32px, 4.5vw, 52px);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .sub-hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
        }
        .sub-hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 20px;
        }
        .sub-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border: 1px solid var(--border-default);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.04);
        }
        .sub-hero-tag i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        /* ========== Buttons ========== */
        .btn-custom-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
        }
        .btn-custom-primary:hover {
            background: #00F0FF;
            color: #0A0A0C;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-custom-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
        }
        .btn-custom-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255,255,255,0.25);
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
        }
        .btn-custom-secondary:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0,229,255,0.08);
            box-shadow: 0 0 16px rgba(0,229,255,0.2);
            transform: translateY(-2px);
        }
        .btn-custom-secondary:active {
            transform: translateY(0);
        }

        /* ========== Cards ========== */
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .content-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .content-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .content-card:hover .content-card-img img {
            transform: scale(1.05);
        }
        .content-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10,10,12,0.6) 100%);
            pointer-events: none;
        }
        .content-card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .content-card-tag {
            font-size: 0.72rem;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(0,229,255,0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0,229,255,0.25);
            letter-spacing: 0.04em;
        }
        .content-card-tag.amber {
            background: rgba(255,179,0,0.1);
            color: var(--accent-amber);
            border-color: rgba(255,179,0,0.25);
        }
        .content-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .content-card-title a:hover {
            color: var(--accent-cyan);
        }
        .content-card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .content-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .content-card-meta i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        /* ========== Feature Highlight ========== */
        .feature-highlight-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
        }
        .feature-highlight-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-highlight-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            opacity: 0;
            transition: var(--transition-base);
        }
        .feature-highlight-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
        }
        .feature-highlight-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(0,229,255,0.1);
            border: 1px solid rgba(0,229,255,0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }
        .feature-icon.amber {
            background: rgba(255,179,0,0.1);
            border-color: rgba(255,179,0,0.3);
            color: var(--accent-amber);
        }
        .feature-highlight-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .feature-highlight-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ========== Steps ========== */
        .steps-section {
            background: var(--bg-primary);
        }
        .step-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border-default);
            position: relative;
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            font-family: var(--font-display);
            font-size: 3.2rem;
            font-weight: 700;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--accent-cyan);
            line-height: 1;
            min-width: 70px;
            flex-shrink: 0;
            letter-spacing: 0.02em;
        }
        .step-number.amber {
            -webkit-text-stroke: 1.5px var(--accent-amber);
        }
        .step-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .step-content .step-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .step-content .step-tags span {
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 4px;
            background: rgba(255,255,255,0.05);
            border: 1px solid var(--border-default);
            color: var(--text-secondary);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
        }
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-item:last-child {
            margin-bottom: 0;
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--border-hover);
        }
        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
            letter-spacing: 0.01em;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0,229,255,0.06);
            color: var(--accent-cyan);
            box-shadow: none;
            border-left: 3px solid var(--accent-cyan);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-cyan);
            outline-offset: -2px;
        }
        .accordion-custom .accordion-button::after {
            filter: brightness(0) invert(1);
            opacity: 0.6;
        }
        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
            padding: 16px 22px 20px;
            border-top: 1px solid var(--border-default);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            position: relative;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,10,12,0.85) 0%, rgba(10,10,12,0.9) 100%);
            z-index: 1;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0,229,255,0.1) 0%, transparent 60%);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 32px;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== Pagination ========== */
        .pagination-custom {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            transition: var(--transition-base);
        }
        .pagination-custom .page-link-custom:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }
        .pagination-custom .page-link-custom.active {
            background: var(--accent-cyan);
            color: #0A0A0C;
            border-color: var(--accent-cyan);
            font-weight: 700;
        }
        .pagination-custom .page-link-custom.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 64px 0 28px;
        }
        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: inline-block;
            margin-bottom: 16px;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }
        .footer-brand:hover {
            color: var(--text-primary);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 300px;
        }
        .footer-links-group h5 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .footer-links-group a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: var(--transition-base);
        }
        .footer-links-group a:hover {
            color: var(--accent-cyan);
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-default);
            margin-top: 48px;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1200px) {
            .nav-link-custom {
                font-size: 0.8rem;
                padding: 8px 7px;
            }
            .nav-brand {
                font-size: 1.5rem;
            }
            .nav-left {
                padding-right: 10px;
            }
            .nav-right {
                padding-left: 10px;
            }
        }

        @media (max-width: 991px) {
            :root {
                --section-padding: 72px 0;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .navbar-custom {
                justify-content: space-between;
                padding: 0 20px;
            }
            .nav-brand {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .sub-hero {
                min-height: 40vh;
                margin-top: 72px;
            }
            .sub-hero-title {
                font-size: clamp(26px, 5vw, 36px);
            }
            .sub-hero-desc {
                font-size: 1rem;
            }
            .step-number {
                font-size: 2.4rem;
                min-width: 50px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-padding: 56px 0;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .sub-hero {
                min-height: 36vh;
            }
            .sub-hero-content {
                padding: 48px 0 40px;
            }
            .sub-hero-title {
                font-size: clamp(24px, 6vw, 30px);
            }
            .step-item {
                flex-direction: column;
                gap: 10px;
            }
            .step-number {
                font-size: 2rem;
                min-width: auto;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-custom-primary,
            .btn-custom-secondary {
                width: 100%;
                justify-content: center;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 48px 0 20px;
            }
            .pagination-custom .page-link-custom {
                min-width: 34px;
                height: 34px;
                font-size: 0.78rem;
                padding: 0 8px;
            }
        }

        @media (max-width: 520px) {
            .nav-brand {
                font-size: 1.3rem;
            }
            .sub-hero-title {
                font-size: 22px;
            }
            .sub-hero-desc {
                font-size: 0.9rem;
            }
            .section-title {
                font-size: 24px;
            }
            .content-card-body {
                padding: 16px;
            }
            .feature-highlight-card {
                padding: 24px 20px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
            padding-top: 72px;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-padding {
            padding: var(--section-padding);
        }
        .section-padding-sm {
            padding: 64px 0;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }
        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .text-accent-cyan {
            color: var(--accent-cyan);
        }
        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }
        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }
        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
        }
        .nav-brand span {
            color: var(--accent-cyan);
        }
        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }
        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }
        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }
        .nav-link-custom:hover {
            color: var(--text-primary);
        }
        .nav-link-custom:hover::after {
            right: 10px;
        }
        .nav-link-custom.active {
            color: var(--accent-cyan);
        }
        .nav-link-custom.active::after {
            right: 10px;
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            color: var(--text-primary);
            font-size: 1.2rem;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* ========== Sub Hero ========== */
        .sub-hero {
            position: relative;
            min-height: 48vh;
            display: flex;
            align-items: center;
            background: var(--bg-secondary) url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            border-bottom: 1px solid var(--border-default);
            overflow: hidden;
        }
        .sub-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 12, 0.55) 0%, rgba(10, 10, 12, 0.78) 45%, var(--bg-primary) 100%);
            pointer-events: none;
        }
        .sub-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 55%);
            pointer-events: none;
        }
        .sub-hero-content {
            position: relative;
            z-index: 2;
            padding: 72px 0 48px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }
        .sub-hero h1 {
            font-size: clamp(32px, 4.5vw, 52px);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .sub-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* ========== Buttons ========== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }
        .btn-primary-custom:hover {
            background: #33EAFF;
            color: #0A0A0C;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }
        .btn-outline-custom:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        /* ========== Cards ========== */
        .growth-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .growth-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent-cyan);
            opacity: 0;
            transition: var(--transition-base);
        }
        .growth-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .growth-card:hover::before {
            opacity: 1;
        }
        .growth-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }
        .growth-card:hover .icon-wrap {
            background: rgba(0, 229, 255, 0.16);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
        }
        .growth-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .growth-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ========== Metrics Bar ========== */
        .metrics-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }
        .metrics-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center 40%, rgba(0, 229, 255, 0.06) 0%, transparent 65%);
            pointer-events: none;
        }
        .metric-item {
            text-align: center;
            padding: 20px 16px;
            position: relative;
        }
        .metric-item .metric-value {
            font-family: var(--font-display);
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }
        .metric-item .metric-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
        }
        .metric-divider {
            position: absolute;
            right: -1px;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 48px;
            background: var(--border-default);
        }

        /* ========== Scenario Cards ========== */
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .scenario-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .scenario-card .card-img-wrap {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 9;
        }
        .scenario-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .scenario-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .scenario-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 10, 12, 0.8);
            color: var(--accent-cyan);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid rgba(0, 229, 255, 0.3);
            letter-spacing: 0.06em;
            backdrop-filter: blur(6px);
        }
        .scenario-card .card-body-custom {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .scenario-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .scenario-card .card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }
        .scenario-card .card-link:hover {
            gap: 10px;
        }

        /* ========== Process Steps ========== */
        .process-step {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            position: relative;
        }
        .process-step::before {
            content: '';
            position: absolute;
            left: 22px;
            top: 64px;
            bottom: 0;
            width: 2px;
            background: var(--border-default);
        }
        .process-step:last-child::before {
            display: none;
        }
        .process-step .step-num {
            flex-shrink: 0;
            width: 46px;
            height: 46px;
            border-radius: var(--radius-sm);
            background: var(--bg-elevated);
            border: 1px solid var(--border-default);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-amber);
            position: relative;
            z-index: 1;
        }
        .process-step .step-num.active-num {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .process-step .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .process-step .step-content p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .process-step .step-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .step-tag {
            font-size: 0.72rem;
            color: var(--accent-amber);
            background: rgba(255, 179, 0, 0.08);
            border: 1px solid rgba(255, 179, 0, 0.25);
            padding: 3px 10px;
            border-radius: 14px;
            letter-spacing: 0.04em;
        }

        /* ========== FAQ ========== */
        .accordion-custom .accordion-item {
            background: transparent;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-item:hover {
            border-color: rgba(255, 255, 255, 0.18);
        }
        .accordion-custom .accordion-item.active-item {
            border-color: var(--border-hover);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
        }
        .accordion-custom .accordion-header {
            margin: 0;
        }
        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 20px;
            border-radius: 0 !important;
            box-shadow: none;
            letter-spacing: 0.01em;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg-elevated);
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }
        .accordion-custom .accordion-button::after {
            filter: brightness(0) invert(0.7);
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-button:not(.collapsed)::after {
            filter: brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(140deg);
        }
        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
            padding: 16px 20px 20px;
            border-top: 1px solid var(--border-default);
        }
        .accordion-custom .accordion-button .faq-icon {
            color: var(--accent-cyan);
            margin-right: 10px;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background: var(--bg-secondary) url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            border-top: 1px solid var(--border-default);
            padding: 72px 0;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 12, 0.88) 0%, rgba(10, 10, 12, 0.72) 50%, rgba(10, 10, 12, 0.88) 100%);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 75% 40%, rgba(0, 229, 255, 0.1) 0%, transparent 55%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-content h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== Pagination ========== */
        .pagination-custom {
            display: flex;
            gap: 6px;
            justify-content: center;
            align-items: center;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            transition: var(--transition-base);
            cursor: pointer;
            text-decoration: none;
        }
        .pagination-custom .page-link-custom:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }
        .pagination-custom .page-link-custom.active-page {
            background: var(--accent-cyan);
            border-color: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
        }
        .pagination-custom .page-dots {
            color: var(--text-muted);
            font-size: 0.88rem;
            padding: 0 4px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 56px 0 24px;
        }
        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }
        .footer-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-links-group h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }
        .footer-links-group a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            transition: var(--transition-base);
        }
        .footer-links-group a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-default);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991px) {
            .nav-left,
            .nav-right {
                padding-left: 8px;
                padding-right: 8px;
                gap: 2px;
            }
            .nav-link-custom {
                font-size: 0.78rem;
                padding: 6px 6px;
            }
            .nav-brand {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-top: 60px;
            }
            .navbar-custom {
                min-height: 60px;
                padding: 0 16px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-brand {
                font-size: 1.3rem;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .navbar-custom {
                justify-content: space-between;
            }
            .nav-brand {
                flex: 1;
                text-align: left;
            }
            .sub-hero {
                min-height: 40vh;
            }
            .sub-hero-content {
                padding: 48px 0 32px;
            }
            .sub-hero h1 {
                font-size: 28px;
            }
            .sub-hero p {
                font-size: 0.95rem;
            }
            .section-padding {
                padding: var(--section-padding-mobile);
            }
            .metric-divider {
                display: none;
            }
            .metric-item {
                padding: 12px 8px;
            }
            .metric-item .metric-value {
                font-size: 28px;
            }
            .process-step {
                gap: 14px;
            }
            .process-step .step-num {
                width: 38px;
                height: 38px;
                font-size: 0.9rem;
            }
            .process-step::before {
                left: 18px;
                top: 54px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 24px;
            }
            .sub-hero h1 {
                font-size: 24px;
            }
            .cta-btns {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
            .pagination-custom .page-link-custom {
                min-width: 34px;
                height: 34px;
                font-size: 0.8rem;
            }
        }

        /* ========== Mobile Nav ========== */
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 10, 12, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 1040;
            padding: 24px 20px 40px;
            overflow-y: auto;
            border-top: 1px solid var(--border-default);
        }
        .mobile-nav-panel.open {
            display: block;
        }
        .mobile-nav-panel .mobile-nav-link {
            display: block;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 14px 0;
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }
        .mobile-nav-panel .mobile-nav-link:hover,
        .mobile-nav-panel .mobile-nav-link.active {
            color: var(--accent-cyan);
        }
        @media (min-width: 768px) {
            .mobile-nav-panel {
                display: none !important;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-padding {
            padding: var(--section-padding);
        }
        .section-padding-sm {
            padding: 64px 0;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }
        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .text-accent-cyan {
            color: var(--accent-cyan);
        }
        .text-accent-amber {
            color: var(--accent-amber);
        }
        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }
        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }
        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
        }
        .nav-brand span {
            color: var(--accent-cyan);
        }
        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }
        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }
        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }
        .nav-link-custom:hover {
            color: var(--text-primary);
        }
        .nav-link-custom:hover::after {
            right: 10px;
        }
        .nav-link-custom.active {
            color: var(--accent-cyan);
        }
        .nav-link-custom.active::after {
            right: 10px;
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            color: var(--text-primary);
            font-size: 1.3rem;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .mobile-nav-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(10, 10, 12, 0.98);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-default);
            padding: 16px 24px;
            z-index: 1049;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-menu.open {
            display: flex;
        }
        .mobile-nav-menu .nav-link-custom {
            display: block;
            padding: 12px 6px;
            font-size: 1rem;
            border-bottom: 1px solid var(--border-default);
        }
        .mobile-nav-menu .nav-link-custom:last-child {
            border-bottom: none;
        }
        /* ========== Sub Hero ========== */
        .sub-hero {
            position: relative;
            min-height: 52vh;
            display: flex;
            align-items: flex-end;
            padding: 160px 0 64px;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            background-color: var(--bg-primary);
            overflow: hidden;
        }
        .sub-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 12, 0.75) 0%, rgba(10, 10, 12, 0.55) 40%, rgba(10, 10, 12, 0.9) 100%);
            z-index: 1;
        }
        .sub-hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-amber), transparent);
            z-index: 2;
        }
        .sub-hero .container {
            position: relative;
            z-index: 3;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .sub-hero-title {
            font-size: clamp(34px, 4.5vw, 56px);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .sub-hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
        }
        /* ========== Category Content Cards ========== */
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .category-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-elevated);
        }
        .category-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .category-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 10, 12, 0.7) 100%);
            pointer-events: none;
        }
        .category-card .card-body {
            padding: 20px 20px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .category-card .card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .category-card .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .category-card .card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .category-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .category-card .card-meta .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            display: inline-block;
        }
        /* ========== Hardware Feature List ========== */
        .hardware-feature-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }
        .hardware-feature-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-default), transparent);
        }
        .feature-list-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-default);
        }
        .feature-list-item:last-child {
            border-bottom: none;
        }
        .feature-list-item .feature-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-elevated);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            color: var(--accent-cyan);
            font-size: 1.1rem;
            transition: var(--transition-base);
        }
        .feature-list-item:hover .feature-icon {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .feature-list-item .feature-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .feature-list-item .feature-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* ========== Spec Strip ========== */
        .spec-strip {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
            padding: 40px 0;
        }
        .spec-strip .spec-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
        }
        .spec-strip .spec-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 229, 255, 0.08);
            border-radius: var(--radius-sm);
            color: var(--accent-cyan);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .spec-strip .spec-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .spec-strip .spec-value {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-primary);
        }
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--border-hover);
        }
        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
            position: relative;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg-elevated);
            color: var(--accent-cyan);
            box-shadow: none;
            border-left: 3px solid var(--accent-cyan);
        }
        .accordion-custom .accordion-button::after {
            filter: invert(1) brightness(0.8);
            transition: transform 0.3s ease;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-hover);
        }
        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 20px 24px 24px;
            border-top: 1px solid var(--border-default);
        }
        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            background-color: var(--bg-primary);
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 10, 12, 0.82);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 48px;
            max-width: 820px;
            margin: 0 auto;
            box-shadow: var(--shadow-soft);
        }
        .cta-panel .cta-title {
            font-size: clamp(24px, 2.5vw, 32px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .cta-panel .cta-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
            letter-spacing: 0.02em;
        }
        .btn-cta-primary:hover {
            background: #00F0FF;
            color: #0A0A0C;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            cursor: pointer;
            transition: var(--transition-smooth);
            letter-spacing: 0.02em;
        }
        .btn-cta-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }
        /* ========== Pagination ========== */
        .pagination-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            justify-content: center;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
            cursor: pointer;
        }
        .pagination-custom .page-link-custom:hover {
            color: var(--accent-cyan);
            border-color: var(--border-hover);
            background: var(--bg-elevated);
        }
        .pagination-custom .page-link-custom.active {
            background: var(--accent-cyan);
            color: #0A0A0C;
            border-color: var(--accent-cyan);
            font-weight: 700;
        }
        .pagination-custom .page-link-custom.disabled {
            opacity: 0.4;
            pointer-events: none;
        }
        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 64px 0 32px;
        }
        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: inline-block;
            margin-bottom: 16px;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }
        .footer-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 14px rgba(0, 229, 255, 0.4);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-links-group h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer-links-group a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }
        .footer-links-group a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-default);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        /* ========== Responsive ========== */
        @media (max-width: 1199.98px) {
            .navbar-custom {
                padding: 0 16px;
            }
            .nav-link-custom {
                font-size: 0.78rem;
                padding: 8px 6px;
            }
            .nav-brand {
                font-size: 1.5rem;
            }
            .nav-left {
                padding-right: 10px;
            }
            .nav-right {
                padding-left: 10px;
            }
        }
        @media (max-width: 991.98px) {
            .navbar-custom {
                padding: 0 20px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .navbar-toggler-custom {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .site-header .navbar-custom {
                justify-content: space-between;
            }
            .sub-hero {
                min-height: 45vh;
                padding: 140px 0 48px;
            }
            .category-card .card-img-wrap {
                aspect-ratio: 4 / 3;
            }
            .cta-panel {
                padding: 32px 24px;
            }
        }
        @media (max-width: 767.98px) {
            .sub-hero {
                min-height: 40vh;
                padding: 120px 0 40px;
            }
            .sub-hero-title {
                font-size: clamp(28px, 6vw, 36px);
            }
            .sub-hero-desc {
                font-size: 0.95rem;
            }
            .section-padding {
                padding: var(--section-padding-mobile);
            }
            .category-card .card-body {
                padding: 16px 16px 20px;
            }
            .category-card .card-title {
                font-size: 1.05rem;
            }
            .feature-list-item {
                flex-direction: column;
                gap: 12px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-panel {
                padding: 24px 18px;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                justify-content: center;
                font-size: 0.9rem;
                padding: 12px 20px;
            }
            .pagination-custom .page-link-custom {
                min-width: 34px;
                height: 34px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .sub-hero {
                min-height: 38vh;
                padding: 110px 0 32px;
            }
            .spec-strip .spec-value {
                font-size: 1.1rem;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
            padding-top: 72px;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: var(--section-padding);
        }

        .section-padding-sm {
            padding: 64px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }

        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

        .text-accent-cyan {
            color: var(--accent-cyan);
        }

        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
        }

        .nav-brand span {
            color: var(--accent-cyan);
        }

        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }

        .nav-link-custom {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 10px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }

        .nav-link-custom:hover {
            color: var(--text-primary);
        }

        .nav-link-custom:hover::after {
            right: 10px;
        }

        .nav-link-custom.active {
            color: var(--accent-cyan);
        }

        .nav-link-custom.active::after {
            right: 10px;
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 6px 12px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .navbar-toggler-custom:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }

        .mobile-nav-collapse {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(10, 10, 12, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-default);
            padding: 20px 24px 24px;
            z-index: 1049;
            flex-direction: column;
            gap: 4px;
            box-shadow: var(--shadow-soft);
        }

        .mobile-nav-collapse.open {
            display: flex;
        }

        .mobile-nav-collapse .nav-link-custom {
            padding: 12px 8px;
            font-size: 1rem;
            border-bottom: 1px solid var(--border-default);
        }

        .mobile-nav-collapse .nav-link-custom:last-child {
            border-bottom: none;
        }

        .mobile-nav-collapse .nav-link-custom::after {
            display: none;
        }

        /* ========== Sub Hero / Breadcrumb ========== */
        .sub-hero {
            position: relative;
            min-height: 45vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 80px 0 60px;
            overflow: hidden;
        }

        .sub-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(10,10,12,0.75) 0%, rgba(10,10,12,0.88) 60%, rgba(10,10,12,0.96) 100%);
            z-index: 1;
        }

        .sub-hero::after {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 60%;
            height: 140%;
            background: radial-gradient(ellipse at center, rgba(0,229,255,0.06) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .sub-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-custom .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb-custom .current {
            color: var(--accent-cyan);
        }

        .sub-hero-title {
            font-size: clamp(32px, 4.5vw, 52px);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .sub-hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
        }

        /* ========== Cards ========== */
        .resource-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .resource-card .card-img-wrapper {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-elevated);
        }

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

        .resource-card:hover .card-img-wrapper img {
            transform: scale(1.04);
        }

        .resource-card .card-body-custom {
            padding: 22px 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .resource-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-amber);
            background: rgba(255, 179, 0, 0.08);
            border: 1px solid rgba(255, 179, 0, 0.25);
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            align-self: flex-start;
        }

        .resource-card .card-title-custom {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            line-height: 1.4;
            margin: 0;
        }

        .resource-card .card-desc {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .resource-card .card-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
            margin-top: 4px;
        }

        .resource-card .card-link:hover {
            gap: 10px;
            color: #fff;
        }

        /* ========== Support highlight ========== */
        .support-highlight {
            background: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            height: 100%;
            text-align: left;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .support-highlight::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-amber));
            opacity: 0.8;
        }

        .support-highlight:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
            transform: translateY(-3px);
        }

        .support-highlight .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            margin-bottom: 16px;
        }

        .support-highlight h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .support-highlight p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== Steps ========== */
        .step-item {
            position: relative;
            padding-left: 56px;
            margin-bottom: 32px;
        }

        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            font-family: var(--font-display);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            letter-spacing: -0.02em;
            opacity: 0.7;
        }

        .step-item h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-soft);
        }

        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background: none;
            color: var(--text-muted);
            transition: var(--transition-base);
            font-size: 0.85rem;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            content: '\f077';
            color: var(--accent-cyan);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg-elevated);
            color: var(--accent-cyan);
            border-left: 3px solid var(--accent-cyan);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 18px 20px 20px;
            border-top: 1px solid var(--border-default);
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 80px 0;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(10,10,12,0.92) 0%, rgba(10,10,12,0.78) 50%, rgba(10,10,12,0.9) 100%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-section .section-title {
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section .section-desc {
            color: var(--text-secondary);
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary-custom {
            display: inline-block;
            background: var(--accent-cyan);
            color: var(--bg-primary);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
            text-decoration: none;
        }

        .btn-primary-custom:hover {
            background: #00f0ff;
            color: var(--bg-primary);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }

        .btn-secondary-custom {
            display: inline-block;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 13px 32px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        .btn-secondary-custom:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent-cyan);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 56px 0 28px;
            color: var(--text-secondary);
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-brand span {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 320px;
        }

        .footer-links-group h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-links-group a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            transition: var(--transition-base);
        }

        .footer-links-group a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-default);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .navbar-toggler-custom {
                display: block;
            }

            .navbar-custom {
                justify-content: space-between;
                padding: 0 16px;
            }

            .nav-brand {
                font-size: 1.5rem;
            }

            .sub-hero {
                min-height: 38vh;
                padding: 60px 0 40px;
            }

            .section-padding {
                padding: var(--section-padding-mobile);
            }
        }

        @media (max-width: 767.98px) {
            .sub-hero {
                min-height: 32vh;
                padding: 50px 0 36px;
            }

            .sub-hero-title {
                font-size: 1.8rem;
            }

            .sub-hero-desc {
                font-size: 0.95rem;
            }

            .step-item {
                padding-left: 44px;
                margin-bottom: 24px;
            }

            .step-number {
                font-size: 1.8rem;
            }

            .resource-card .card-body-custom {
                padding: 16px 14px 18px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .btn-primary-custom,
            .btn-secondary-custom {
                padding: 12px 24px;
                font-size: 0.92rem;
                width: 100%;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .sub-hero-title {
                font-size: 1.5rem;
            }

            .breadcrumb-custom {
                font-size: 0.75rem;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0A0C;
            --bg-secondary: #141419;
            --bg-card: #1A1A21;
            --bg-elevated: #20202A;
            --text-primary: #F2F5F9;
            --text-secondary: #B8BEC8;
            --text-muted: #7A8290;
            --accent-cyan: #00E5FF;
            --accent-amber: #FFB300;
            --accent-magenta: #FF3366;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --transition-base: all 0.28s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Impact', 'Oswald', 'Arial Narrow', 'PingFang SC', sans-serif;
            --section-padding: 96px 0;
            --section-padding-mobile: 64px 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: var(--section-padding);
        }

        .section-padding-sm {
            padding: 64px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 12px;
        }

        .section-title {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

        .text-accent-cyan {
            color: var(--accent-cyan);
        }

        .text-accent-amber {
            color: var(--accent-amber);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 10, 12, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-default);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 12, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            min-height: 72px;
            padding: 0 24px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 16px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 16px;
        }

        .nav-brand {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            text-align: center;
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .nav-brand span {
            color: var(--accent-cyan);
        }

        .nav-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }

        .nav-link-custom {
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 9px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
            border-radius: 0;
        }

        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 9px;
            right: 100%;
            height: 2px;
            background: var(--accent-cyan);
            transition: right 0.3s ease;
        }

        .nav-link-custom:hover {
            color: var(--text-primary);
        }

        .nav-link-custom:hover::after {
            right: 9px;
        }

        .nav-link-custom.active {
            color: var(--accent-cyan);
        }

        .nav-link-custom.active::after {
            right: 9px;
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.25rem;
            padding: 8px 12px;
            cursor: pointer;
            transition: var(--transition-base);
            margin-left: auto;
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 10, 12, 0.98);
            z-index: 1049;
            padding: 24px;
            overflow-y: auto;
            border-top: 1px solid var(--border-default);
        }

        .mobile-nav-overlay.show {
            display: block;
        }

        .mobile-nav-overlay a {
            display: block;
            padding: 14px 12px;
            font-size: 1.05rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: var(--accent-cyan);
            padding-left: 18px;
        }

        /* ========== Sub Hero ========== */
        .sub-hero {
            position: relative;
            min-height: 48vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 140px 0 64px;
            margin-top: 0;
        }

        .sub-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 12, 0.85) 0%, rgba(10, 10, 12, 0.7) 45%, rgba(10, 10, 12, 0.92) 100%);
            pointer-events: none;
        }

        .sub-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--text-muted);
            transition: var(--transition-base);
        }

        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-custom .separator {
            color: rgba(255, 255, 255, 0.25);
            font-size: 0.7rem;
        }

        .breadcrumb-custom .current {
            color: var(--accent-cyan);
        }

        .sub-hero-title {
            font-size: clamp(32px, 4vw, 52px);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .sub-hero-title .highlight {
            color: var(--accent-cyan);
        }

        .sub-hero-desc {
            font-size: 1.08rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 24px;
        }

        .sub-hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .sub-hero-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 20px;
            font-size: 0.78rem;
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            letter-spacing: 0.05em;
        }

        .sub-hero-tags .tag i {
            font-size: 0.7rem;
        }

        /* ========== Case Cards ========== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-smooth);
            cursor: pointer;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }

        .case-card .card-img-wrapper {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

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

        .case-card:hover .card-img-wrapper img {
            transform: scale(1.05);
        }

        .case-card .card-img-wrapper::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.05) 40%, rgba(10, 10, 12, 0.55) 100%);
            pointer-events: none;
        }

        .case-card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 12px;
            background: rgba(10, 10, 12, 0.75);
            border: 1px solid rgba(0, 229, 255, 0.35);
            border-radius: 20px;
            font-size: 0.72rem;
            color: var(--accent-cyan);
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            backdrop-filter: blur(6px);
        }

        .case-card .card-body-custom {
            padding: 20px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }

        .case-card .card-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .case-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.76rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 12px;
        }

        .case-card .card-meta .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
        }

        .case-card .card-meta .meta-tag {
            color: var(--accent-amber);
            font-weight: 500;
        }

        /* ========== Pagination ========== */
        .pagination-custom {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            margin-top: 48px;
        }

        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition-base);
            cursor: pointer;
            user-select: none;
        }

        .pagination-custom .page-link-custom:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }

        .pagination-custom .page-link-custom.active {
            background: var(--accent-cyan);
            color: #0A0A0C;
            border-color: var(--accent-cyan);
            font-weight: 700;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
        }

        .pagination-custom .page-link-custom.disabled {
            opacity: 0.35;
            pointer-events: none;
        }

        /* ========== Stats Band ========== */
        .stats-section {
            background: linear-gradient(135deg, #0A0A0C 0%, #121218 45%, #0D0D12 100%);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 720px;
            height: 720px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 65%);
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .stat-item {
            text-align: center;
            padding: 20px 12px;
        }

        .stat-number {
            font-family: var(--font-display);
            font-size: clamp(36px, 4vw, 56px);
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 8px;
            text-shadow: 0 0 24px rgba(0, 229, 255, 0.3);
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            letter-spacing: 0.08em;
            font-weight: 500;
        }

        /* ========== Process Steps ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            position: relative;
            transition: var(--transition-smooth);
            counter-increment: step;
        }

        .process-step:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
        }

        .process-step .step-number {
            font-family: var(--font-display);
            font-size: 2.6rem;
            font-weight: 800;
            color: rgba(0, 229, 255, 0.15);
            line-height: 1;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            transition: var(--transition-base);
        }

        .process-step:hover .step-number {
            color: rgba(0, 229, 255, 0.4);
        }

        .process-step .step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .process-step .step-desc {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .process-step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            opacity: 0.6;
            transition: var(--transition-base);
        }

        .process-step:hover::before {
            opacity: 1;
            height: 4px;
        }

        /* ========== Industry Badges ========== */
        .industry-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .industry-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        .industry-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-smooth);
            user-select: none;
        }

        .industry-badge:hover {
            border-color: var(--border-hover);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.05);
            transform: translateY(-2px);
        }

        .industry-badge i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

        /* ========== FAQ ========== */
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-item:first-of-type {
            border-left-color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.08);
        }

        .accordion-custom .accordion-item:hover {
            border-color: rgba(255, 255, 255, 0.16);
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-size: 1rem;
            font-weight: 600;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            letter-spacing: -0.01em;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 229, 255, 0.04);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(1);
            opacity: 0.5;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            filter: invert(1) sepia(1) saturate(10) hue-rotate(130deg);
            opacity: 1;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
            padding: 16px 22px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* ========== CTA Form ========== */
        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 96px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 12, 0.92) 0%, rgba(10, 10, 12, 0.78) 50%, rgba(10, 10, 12, 0.9) 100%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-form-wrapper {
            background: rgba(20, 20, 25, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 32px;
            max-width: 560px;
            margin-left: auto;
            box-shadow: var(--shadow-soft);
        }

        .cta-form-wrapper .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            padding: 12px 16px;
            font-size: 0.95rem;
            transition: var(--transition-base);
            width: 100%;
        }

        .cta-form-wrapper .form-control::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }

        .cta-form-wrapper .form-control:focus {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
            outline: none;
        }

        .cta-form-wrapper .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .cta-form-wrapper textarea.form-control {
            min-height: 110px;
            resize: vertical;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 13px 28px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-smooth);
            letter-spacing: 0.04em;
            width: 100%;
        }

        .btn-primary-custom:hover {
            background: #4DECFF;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
            color: #0A0A0C;
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.25);
        }

        /* ========== Buttons ========== */
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 11px 24px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-smooth);
            letter-spacing: 0.04em;
        }

        .btn-outline-custom:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--border-hover);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 56px 0 24px;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-brand span {
            color: var(--accent-cyan);
        }

        .footer-brand:hover {
            color: var(--text-primary);
            text-shadow: 0 0 14px rgba(0, 229, 255, 0.4);
        }

        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .footer-links-group h5 {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .footer-links-group a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition-base);
        }

        .footer-links-group a:hover {
            color: var(--accent-cyan);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 40px;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-bottom span {
            letter-spacing: 0.02em;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1199.98px) {
            .nav-left .nav-link-custom {
                font-size: 0.8rem;
                padding: 8px 7px;
            }
            .nav-right .nav-link-custom {
                font-size: 0.8rem;
                padding: 8px 7px;
            }
            .nav-brand {
                font-size: 1.45rem;
            }
        }

        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .navbar-toggler-custom {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .navbar-custom {
                justify-content: space-between;
                padding: 0 16px;
                min-height: 64px;
            }
            .nav-brand {
                font-size: 1.5rem;
                margin: 0 auto;
            }
            .mobile-nav-overlay {
                top: 64px;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .sub-hero {
                min-height: 40vh;
                padding: 110px 0 48px;
            }
            .cta-form-wrapper {
                max-width: 100%;
                margin-left: 0;
            }
            .section-padding {
                padding: 72px 0;
            }
        }

        @media (max-width: 767.98px) {
            .case-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-number {
                font-size: 28px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .sub-hero {
                min-height: 36vh;
                padding: 96px 0 36px;
            }
            .sub-hero-title {
                font-size: 28px;
            }
            .breadcrumb-custom {
                font-size: 0.78rem;
            }
            .industry-badges {
                gap: 8px;
            }
            .industry-badge {
                padding: 9px 14px;
                font-size: 0.8rem;
            }
            .pagination-custom .page-link-custom {
                min-width: 36px;
                height: 36px;
                padding: 0 8px;
                font-size: 0.82rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .cta-form-wrapper {
                padding: 22px;
            }
            .sub-hero-tags .tag {
                font-size: 0.7rem;
                padding: 5px 10px;
            }
        }

        @media (max-width: 575.98px) {
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .case-card .card-title {
                font-size: 1rem;
            }
            .case-card .card-body-custom {
                padding: 16px 16px 18px;
            }
        }