/* roulang page: index */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-cyan: rgba(0, 229, 255, 0.35);
            --accent-cyan: #00E5FF;
            --accent-blue: #3B82F6;
            --accent-orange: #F97316;
            --text-primary: #F8FAFC;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --text-weak: #64748B;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(0, 229, 255, 0.45);
            --shadow-glow-strong: 0 0 30px rgba(0, 229, 255, 0.70);
            --radius-card: 18px;
            --radius-sm: 10px;
            --radius-btn: 12px;
            --spacing-section: 80px;
            --spacing-card: 24px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        * {
            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);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(0, 229, 255, 0.05) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

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

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

        button,
        input {
            font-family: var(--font-sans);
            font-size: 16px;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.82);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 15, 30, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            line-height: 1;
        }

        .nav-logo:hover {
            filter: brightness(1.15);
        }

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

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            background: rgba(10, 15, 30, 0.98);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
        }

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

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .mobile-menu .nav-cta {
            margin-top: 8px;
            justify-content: center;
            width: 100%;
        }

        /* Section Base */
        .section {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        .section-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.35;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 14px;
            background: rgba(0, 229, 255, 0.10);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.25);
        }

        /* Glass Card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            box-shadow: var(--shadow-dark);
            padding: 28px;
            transition: var(--transition-base);
            overflow: hidden;
            position: relative;
        }

        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 229, 255, 0.2);
        }

        .glass-card.flat-hover:hover {
            transform: none;
        }

        .glass-card .card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .glass-card .card-image-sm {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .glass-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .glass-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            border-radius: 8px;
        }

        /* Badge */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.3);
            white-space: nowrap;
        }

        .badge-orange {
            background: rgba(249, 115, 22, 0.12);
            color: var(--accent-orange);
            border-color: rgba(249, 115, 22, 0.3);
        }

        .badge-green {
            background: rgba(34, 211, 238, 0.12);
            color: #22D3EE;
            border-color: rgba(34, 211, 238, 0.3);
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            padding: 80px 0;
            background-image: url('/assets/images/f9ab6fa43a7f88f6.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.92) 0%, rgba(10, 15, 30, 0.78) 40%, rgba(11, 18, 32, 0.88) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 50%, rgba(0, 229, 255, 0.06) 0%, transparent 55%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-left .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid rgba(0, 229, 255, 0.25);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .hero-left h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-left .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-right {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-whitepaper {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            box-shadow: var(--shadow-dark);
            padding: 32px;
        }

        .hero-whitepaper .wp-cover {
            display: flex;
            align-items: center;
            gap: 18px;
            margin-bottom: 20px;
        }

        .hero-whitepaper .wp-cover img {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-whitepaper .wp-cover h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .hero-whitepaper .wp-toc {
            list-style: none;
            padding: 0;
            margin: 0 0 20px 0;
        }

        .hero-whitepaper .wp-toc li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 14px;
            color: var(--text-secondary);
        }

        .hero-whitepaper .wp-toc li:last-child {
            border-bottom: none;
        }

        .hero-whitepaper .wp-toc .wp-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
        }

        .hero-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .hero-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .hero-form input::placeholder {
            color: var(--text-weak);
        }

        .hero-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
        }

        /* Data strips */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-item {
            text-align: center;
            padding: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            transition: var(--transition-base);
        }

        .data-item:hover {
            border-color: var(--border-cyan);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
        }

        .data-item .data-number {
            font-size: 36px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .data-item .data-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Step timeline */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            padding: 24px;
            transition: var(--transition-base);
            counter-increment: step;
            position: relative;
        }

        .step-card::before {
            content: counter(step, decimal-leading-zero);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 42px;
            font-weight: 800;
            color: rgba(0, 229, 255, 0.12);
            line-height: 1;
            pointer-events: none;
        }

        .step-card:hover {
            border-color: var(--border-cyan);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Case wall / cards */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .case-grid .case-featured {
            grid-column: span 2;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            transition: var(--transition-base);
        }

        .case-card:hover {
            border-color: var(--border-cyan);
            box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.2), 0 12px 40px rgba(0, 0, 0, 0.5);
            transform: translateY(-4px);
        }

        .case-card .case-image {
            width: 100%;
            height: 170px;
            object-fit: cover;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .case-card .case-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .case-card .case-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            padding: 16px 20px;
            transition: var(--transition-base);
            align-items: center;
        }

        .news-item:hover {
            border-color: var(--border-cyan);
            transform: translateX(4px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
        }

        .news-item img {
            width: 80px;
            height: 60px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .news-item .news-body {
            flex: 1;
        }

        .news-item .news-body h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .news-item .news-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .news-item .news-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-weak);
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            overflow: hidden;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.25);
        }

        .faq-item.active {
            border-color: var(--border-cyan);
            background: rgba(255, 255, 255, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            user-select: none;
            transition: var(--transition-base);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(0, 229, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-cyan);
            transition: var(--transition-base);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 229, 255, 0.12);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Guarantee bar */
        .guarantee-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: rgba(0, 229, 255, 0.05);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: var(--radius-card);
            flex-wrap: wrap;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .guarantee-item .g-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        /* Contact / CTA form */
        .contact-section {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(0, 229, 255, 0.04) 100%);
            border-radius: 24px;
            padding: 48px;
            border: 1px solid rgba(0, 229, 255, 0.15);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 480px;
        }

        .contact-form input {
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .contact-form input::placeholder {
            color: var(--text-weak);
        }

        .contact-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
        }

        /* Partner logos */
        .partner-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
        }

        .partner-item {
            padding: 18px 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            transition: var(--transition-base);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
        }

        .partner-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: rgba(5, 8, 18, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 32px;
            margin-top: 40px;
        }

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

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

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

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }

        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: var(--transition-base);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-left {
                text-align: left;
            }

            .hero-left .hero-subtitle {
                max-width: 100%;
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .case-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .case-grid .case-featured {
                grid-column: span 2;
            }

            .partner-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .section {
                padding: 60px 0;
            }

            .contact-section {
                padding: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-wrapper {
                height: 60px;
            }

            .nav-logo {
                font-size: 24px;
            }

            .nav-cta {
                display: none;
            }

            .mobile-menu .nav-cta {
                display: flex;
            }

            .hero-section {
                min-height: auto;
                padding: 60px 0;
            }

            .hero-left h1 {
                font-size: 30px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
            }

            .hero-whitepaper {
                padding: 22px;
            }

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

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .data-item .data-number {
                font-size: 28px;
            }

            .steps {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .case-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .case-grid .case-featured {
                grid-column: span 1;
            }

            .case-card .case-image {
                height: 160px;
            }

            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 14px;
            }

            .news-item img {
                width: 100%;
                height: 120px;
                object-fit: cover;
            }

            .news-item .news-meta {
                flex-wrap: wrap;
                gap: 8px;
            }

            .guarantee-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 16px 18px;
            }

            .partner-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }

            .contact-section {
                padding: 24px 18px;
                border-radius: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .section {
                padding: 48px 0;
            }

            .container {
                padding: 0 16px;
            }

            .glass-card {
                padding: 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: 26px;
            }

            .section-title {
                font-size: 22px;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .data-item {
                padding: 14px;
            }

            .data-item .data-number {
                font-size: 24px;
            }

            .btn-primary,
            .btn-secondary {
                padding: 12px 20px;
                font-size: 15px;
            }

            .glass-card {
                padding: 16px;
                border-radius: 14px;
            }

            .glass-card .card-image {
                height: 140px;
            }

            .contact-form input {
                padding: 12px 14px;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-cyan: rgba(0, 229, 255, 0.35);
            --accent-cyan: #00E5FF;
            --accent-blue: #3B82F6;
            --accent-orange: #F97316;
            --accent-green: #22D3EE;
            --text-primary: #F8FAFC;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --text-weak: #64748B;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(0, 229, 255, 0.45);
            --shadow-glow-strong: 0 0 30px rgba(0, 229, 255, 0.70);
            --radius-card: 18px;
            --radius-sm: 10px;
            --radius-btn: 12px;
            --spacing-section: 72px;
            --spacing-card: 24px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(0, 229, 255, 0.05) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: var(--font-sans);
            font-size: 16px;
            outline: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.82);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(10, 15, 30, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            line-height: 1;
        }
        .nav-logo:hover {
            filter: brightness(1.15);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li {
            position: relative;
        }
        .nav-links a {
            display: block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.25), var(--shadow-dark);
        }
        .glass-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .glass-btn:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }
        .glass-btn:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }
        .glass-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
        }
        .glass-btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-header {
            margin-bottom: 32px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin: 0 0 8px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
            max-width: 640px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .badge:hover {
            border-color: var(--border-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .badge-cyan {
            border-color: var(--border-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .badge-orange {
            border-color: rgba(249, 115, 22, 0.4);
            color: var(--accent-orange);
            background: rgba(249, 115, 22, 0.08);
        }
        .badge-green {
            border-color: rgba(34, 211, 238, 0.4);
            color: var(--accent-green);
            background: rgba(34, 211, 238, 0.08);
        }
        .list-item {
            display: flex;
            gap: 20px;
            padding: 20px;
            border-radius: var(--radius-card);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            transition: var(--transition-base);
            margin-bottom: 16px;
        }
        .list-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
            transform: translateY(-2px);
        }
        .list-item-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 84px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
        }
        .list-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .list-item-content {
            flex: 1;
            min-width: 0;
        }
        .list-item-content h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .list-item-content p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0 0 8px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
        }
        .stat-card {
            padding: 24px;
            border-radius: var(--radius-card);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            transition: var(--transition-base);
            text-align: left;
        }
        .stat-card:hover {
            border-color: var(--border-cyan);
            background: var(--bg-card-hover);
            box-shadow: 0 0 22px rgba(0, 229, 255, 0.2);
        }
        .stat-value {
            font-size: 34px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            background: var(--bg-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-cyan);
        }
        .faq-question {
            width: 100%;
            padding: 18px 20px;
            background: transparent;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-icon {
            flex-shrink: 0;
            font-size: 20px;
            color: var(--accent-cyan);
            transition: var(--transition-base);
            font-weight: 400;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 240px;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }
        .subscribe-form input::placeholder {
            color: var(--text-weak);
        }
        .subscribe-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.25);
            background: rgba(255, 255, 255, 0.07);
            outline: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb .sep {
            color: var(--text-weak);
        }
        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }
        .page-header {
            padding: 48px 0 32px;
            border-bottom: 1px solid var(--border-glass);
            margin-bottom: 48px;
            background: linear-gradient(180deg, rgba(0, 229, 255, 0.03) 0%, transparent 100%);
        }
        .page-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.25;
            margin: 0 0 14px;
            letter-spacing: -0.3px;
        }
        .page-header .lead {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0;
            line-height: 1.75;
        }
        .site-footer {
            border-top: 1px solid var(--border-glass);
            background: rgba(10, 15, 30, 0.7);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            padding: 48px 0 24px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-logo {
            font-size: 24px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            border-top: 1px solid var(--border-glass);
            font-size: 13px;
            color: var(--text-weak);
        }
        .footer-bottom div {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .footer-bottom a {
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .match-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .league-card {
            padding: 20px;
            border-radius: var(--radius-card);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .league-card:hover {
            border-color: var(--border-cyan);
            background: var(--bg-card-hover);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
            transform: translateY(-3px);
        }
        .league-card .thumb {
            width: 100%;
            height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
        }
        .league-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .league-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        .league-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .range-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }
        .range-item:hover {
            border-color: var(--border-cyan);
            background: rgba(0, 229, 255, 0.05);
        }
        .range-item .dot {
            flex-shrink: 0;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            margin-top: 8px;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
        }
        .range-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 4px;
        }
        .range-item p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .update-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(34, 211, 238, 0.12);
            color: var(--accent-green);
            border: 1px solid rgba(34, 211, 238, 0.3);
        }
        .version-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(59, 130, 246, 0.12);
            color: #93C5FD;
            border: 1px solid rgba(59, 130, 246, 0.3);
        }
        .trend-bar {
            display: flex;
            align-items: flex-end;
            gap: 8px;
            height: 120px;
            padding: 16px 0;
        }
        .trend-bar .bar {
            flex: 1;
            border-radius: 6px 6px 0 0;
            background: linear-gradient(180deg, var(--accent-cyan) 0%, rgba(0, 229, 255, 0.15) 100%);
            transition: var(--transition-base);
            min-height: 20px;
            position: relative;
        }
        .trend-bar .bar:hover {
            background: linear-gradient(180deg, #7DD3FC 0%, rgba(0, 229, 255, 0.3) 100%);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
        }
        .trend-label {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-weak);
            margin-top: 6px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr;
            }
            .match-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .list-item {
                flex-direction: column;
                gap: 12px;
            }
            .list-item-thumb {
                width: 100%;
                height: 160px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 15, 30, 0.98);
                backdrop-filter: saturate(180%) blur(18px);
                -webkit-backdrop-filter: saturate(180%) blur(18px);
                border-bottom: 1px solid var(--border-glass);
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-cta {
                padding: 10px 16px;
                font-size: 14px;
            }
            .page-header h1 {
                font-size: 28px;
            }
            .page-header .lead {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .match-grid {
                grid-template-columns: 1fr;
            }
            .stat-value {
                font-size: 28px;
            }
            .container {
                padding: 0 16px;
            }
            .subscribe-form input {
                min-width: 100%;
            }
            .trend-bar {
                height: 80px;
                gap: 4px;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 22px;
            }
            .nav-cta {
                padding: 8px 12px;
                font-size: 13px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .list-item-thumb {
                height: 120px;
            }
            .stat-card {
                padding: 16px;
            }
            .stat-value {
                font-size: 24px;
            }
            .glass-btn,
            .glass-btn-outline {
                padding: 10px 18px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-cyan: rgba(0, 229, 255, 0.35);
            --accent-cyan: #00E5FF;
            --accent-blue: #3B82F6;
            --accent-orange: #F97316;
            --text-primary: #F8FAFC;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --text-weak: #64748B;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(0, 229, 255, 0.45);
            --shadow-glow-strong: 0 0 30px rgba(0, 229, 255, 0.70);
            --radius-card: 18px;
            --radius-sm: 10px;
            --radius-btn: 12px;
            --spacing-section: 80px;
            --spacing-card: 24px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(0, 229, 255, 0.05) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

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

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

        button,
        input {
            font-family: var(--font-sans);
            font-size: 16px;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.82);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 15, 30, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            line-height: 1;
        }

        .nav-logo:hover {
            filter: brightness(1.15);
        }

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

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px;
            background: rgba(10, 15, 30, 0.98);
            border-bottom: 1px solid var(--border-glass);
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            transition: var(--transition-base);
        }

        .mobile-menu a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .mobile-menu a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }

        .mobile-menu .nav-cta {
            margin-top: 8px;
            justify-content: center;
        }

        /* Glass card base */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
        }

        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 229, 255, 0.25);
            transform: translateY(-3px);
        }

        /* Buttons */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-glow:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .btn-glow:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .btn-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-glass:hover {
            border-color: var(--border-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
            transform: translateY(-2px);
        }

        /* Tags */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-cyan);
            color: var(--accent-cyan);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .tag:hover {
            background: rgba(0, 229, 255, 0.16);
            border-color: var(--accent-cyan);
        }

        .tag-orange {
            background: rgba(249, 115, 22, 0.12);
            border-color: rgba(249, 115, 22, 0.35);
            color: var(--accent-orange);
        }

        .tag-blue {
            background: rgba(59, 130, 246, 0.12);
            border-color: rgba(59, 130, 246, 0.35);
            color: #93C5FD;
        }

        /* Section heading */
        .section-head {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Category hero */
        .cat-hero {
            padding: 56px 0 40px;
        }

        .cat-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cat-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid var(--border-cyan);
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }

        .cat-hero h1 {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .cat-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
        }

        .cat-hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 28px;
        }

        .stat-item {
            text-align: center;
            padding: 16px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
        }

        .stat-number {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .cat-hero-visual {
            display: flex;
            justify-content: flex-end;
            align-items: center;
        }

        .cat-hero-img-wrap {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-dark);
        }

        .cat-hero-img-wrap img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .cat-hero-img-wrap:hover img {
            transform: scale(1.03);
        }

        /* List cards */
        .list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .list-card {
            display: flex;
            gap: 18px;
            padding: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .list-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 229, 255, 0.2);
            transform: translateY(-2px);
        }

        .list-card-img {
            flex-shrink: 0;
            width: 120px;
            height: 120px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-glass);
        }

        .list-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .list-card:hover .list-card-img img {
            transform: scale(1.06);
        }

        .list-card-body {
            flex: 1;
            min-width: 0;
        }

        .list-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .list-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .list-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        .list-card-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Wide card */
        .list-card-wide {
            grid-column: 1 / -1;
            flex-direction: row;
        }

        .list-card-wide .list-card-img {
            width: 200px;
            height: 150px;
        }

        .list-card-wide .list-card-title {
            font-size: 19px;
        }

        .list-card-wide .list-card-desc {
            -webkit-line-clamp: 3;
        }

        /* Tags cloud */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        /* Data trend bar */
        .trend-chart {
            padding: 24px;
        }

        .trend-bars {
            display: flex;
            align-items: flex-end;
            gap: 12px;
            height: 160px;
            margin-top: 20px;
        }

        .trend-bar-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .trend-bar {
            width: 100%;
            max-width: 48px;
            border-radius: 8px 8px 2px 2px;
            background: linear-gradient(180deg, var(--accent-cyan) 0%, rgba(0, 229, 255, 0.25) 100%);
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
            transition: var(--transition-base);
            min-height: 20px;
        }

        .trend-bar:hover {
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.6);
            filter: brightness(1.2);
        }

        .trend-bar-label {
            font-size: 12px;
            color: var(--text-muted);
        }

        .trend-bar-value {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-cyan);
        }

        /* Update log */
        .update-log-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .update-log-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 16px 18px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
        }

        .update-log-item:hover {
            border-color: var(--border-cyan);
            background: rgba(0, 229, 255, 0.06);
        }

        .update-log-date {
            flex-shrink: 0;
            min-width: 72px;
            padding: 4px 10px;
            border-radius: 6px;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-cyan);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            text-align: center;
            margin-top: 2px;
        }

        .update-log-content {
            flex: 1;
        }

        .update-log-content h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .update-log-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Guide cards */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .guide-card {
            padding: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
        }

        .guide-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(0, 0, 0, 0.4), 0 0 16px rgba(0, 229, 255, 0.18);
        }

        .guide-card-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid var(--border-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 20px;
            margin-bottom: 14px;
        }

        .guide-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .guide-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid var(--border-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 229, 255, 0.2);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* Subscribe / CTA */
        .subscribe-box {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 24px;
            align-items: center;
            padding: 32px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
        }

        .subscribe-box h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .subscribe-box p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            width: 100%;
            max-width: 420px;
        }

        .subscribe-input {
            flex: 1;
            padding: 12px 18px;
            border-radius: var(--radius-btn);
            background: rgba(10, 15, 30, 0.7);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .subscribe-input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .subscribe-input::placeholder {
            color: var(--text-weak);
        }

        /* Footer */
        .site-footer {
            margin-top: var(--spacing-section);
            padding: 48px 0 24px;
            background: rgba(6, 10, 22, 0.85);
            border-top: 1px solid var(--border-glass);
        }

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

        .footer-logo {
            font-size: 26px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

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

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

        .footer-col a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-glass);
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: var(--transition-base);
        }

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

        .footer-bottom div {
            display: flex;
            gap: 12px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
            .cat-hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cat-hero-visual {
                justify-content: center;
            }
            .list-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .guide-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .subscribe-box {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                height: 60px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .mobile-menu.hidden-mobile {
                display: none;
            }
            .cat-hero {
                padding: 36px 0 28px;
            }
            .cat-hero h1 {
                font-size: 28px;
            }
            .cat-hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .stat-number {
                font-size: 20px;
            }
            .list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .list-card {
                flex-direction: column;
            }
            .list-card-img {
                width: 100%;
                height: 180px;
            }
            .list-card-wide {
                flex-direction: column;
            }
            .list-card-wide .list-card-img {
                width: 100%;
                height: 180px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .trend-bars {
                height: 120px;
                gap: 8px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom div {
                flex-wrap: wrap;
                justify-content: center;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-input {
                width: 100%;
            }
            .section-title {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .cat-hero h1 {
                font-size: 24px;
            }
            .cat-hero p {
                font-size: 15px;
            }
            .cat-hero-stats {
                grid-template-columns: 1fr;
                gap: 6px;
            }
            .stat-item {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 10px 16px;
            }
            .stat-number {
                font-size: 22px;
            }
            .stat-label {
                font-size: 13px;
                margin-top: 0;
            }
            .section-title {
                font-size: 22px;
            }
            .list-card-title {
                font-size: 16px;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 14px;
            }
            .btn-glow {
                padding: 10px 18px;
                font-size: 14px;
            }
            .btn-glass {
                padding: 10px 18px;
                font-size: 14px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-cyan: rgba(0, 229, 255, 0.35);
            --accent-cyan: #00E5FF;
            --accent-blue: #3B82F6;
            --accent-orange: #F97316;
            --text-primary: #F8FAFC;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --text-weak: #64748B;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(0, 229, 255, 0.45);
            --shadow-glow-strong: 0 0 30px rgba(0, 229, 255, 0.70);
            --radius-card: 18px;
            --radius-sm: 10px;
            --radius-btn: 12px;
            --spacing-section: 72px;
            --spacing-card: 24px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(0, 229, 255, 0.05) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }

        * {
            box-sizing: border-box;
        }

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

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

        button,
        input {
            font-family: var(--font-sans);
            font-size: 16px;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.82);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 15, 30, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            line-height: 1;
        }

        .nav-logo:hover {
            filter: brightness(1.15);
        }

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

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
        }

        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45), 0 0 18px rgba(0, 229, 255, 0.18);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--border-glass);
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

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

        /* Tag / Badge */
        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.25);
        }

        .badge-orange {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(249, 115, 22, 0.12);
            color: var(--accent-orange);
            border: 1px solid rgba(249, 115, 22, 0.3);
        }

        .badge-blue {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(59, 130, 246, 0.12);
            color: #93C5FD;
            border: 1px solid rgba(59, 130, 246, 0.3);
        }

        /* Section */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-heading {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            margin: 0 0 12px;
        }

        .section-subheading {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 0 32px;
            line-height: 1.7;
        }

        /* Search Bar */
        .search-bar-wrapper {
            position: relative;
            max-width: 560px;
            margin: 0 auto;
        }

        .search-input {
            width: 100%;
            padding: 14px 20px 14px 48px;
            border-radius: 14px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .search-input::placeholder {
            color: var(--text-weak);
        }

        .search-input:focus {
            border-color: var(--border-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
            background: rgba(255, 255, 255, 0.07);
        }

        .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-weak);
            pointer-events: none;
        }

        /* Chip */
        .chip-link {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            transition: var(--transition-base);
            cursor: pointer;
        }

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

        /* Resource card */
        .resource-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }

        .resource-card:hover {
            border-color: var(--border-cyan);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45), 0 0 18px rgba(0, 229, 255, 0.15);
            transform: translateY(-3px);
        }

        .resource-thumb {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: rgba(255, 255, 255, 0.03);
        }

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

        .resource-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.2px;
            line-height: 1.4;
            margin: 0;
        }

        .resource-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
            flex: 1;
        }

        .resource-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
        }

        /* FAQ accordion */
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.04);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.2);
        }

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

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            position: relative;
            transition: var(--transition-base);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: currentColor;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-item.open .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 280px;
            padding: 0 22px 20px;
        }

        .faq-item.open {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(0, 229, 255, 0.3);
        }

        /* Form */
        .subscribe-input {
            flex: 1;
            min-width: 240px;
            padding: 13px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .subscribe-input::placeholder {
            color: var(--text-weak);
        }

        .subscribe-input:focus {
            border-color: var(--border-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
            background: rgba(255, 255, 255, 0.07);
        }

        /* Footer */
        .site-footer {
            background: rgba(10, 15, 30, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 28px;
            margin-top: 40px;
        }

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

        .footer-logo {
            font-size: 24px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.3px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 12px 0 0;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 13px;
        }

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

        /* Mobile */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(10, 15, 30, 0.98);
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                padding: 8px 16px;
                font-size: 14px;
            }

            .section {
                padding: 48px 0;
            }

            .section-heading {
                font-size: 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .nav-wrapper {
                height: 60px;
            }
            .nav-logo {
                font-size: 24px;
            }
            .nav-links {
                top: 60px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 11px 20px;
                font-size: 14px;
            }
            .section-heading {
                font-size: 20px;
            }
            .resource-title {
                font-size: 16px;
            }
        }

        /* Additional page-specific styles */
        .category-hero {
            padding: 48px 0 32px;
            text-align: center;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin: 0 0 14px;
            line-height: 1.25;
        }

        .category-hero p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .chip-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 20px;
        }

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

        .rank-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-num {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-weight: 700;
            font-size: 14px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.25);
        }

        .rank-num.top1 {
            background: rgba(249, 115, 22, 0.15);
            color: var(--accent-orange);
            border-color: rgba(249, 115, 22, 0.35);
        }

        .stat-block {
            text-align: center;
            padding: 22px 16px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
        }

        .stat-value {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -1px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .stat-value {
                font-size: 26px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-cyan: rgba(0, 229, 255, 0.35);
            --accent-cyan: #00E5FF;
            --accent-blue: #3B82F6;
            --accent-orange: #F97316;
            --accent-green: #22D3EE;
            --text-primary: #F8FAFC;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --text-weak: #64748B;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(0, 229, 255, 0.45);
            --shadow-glow-strong: 0 0 30px rgba(0, 229, 255, 0.70);
            --radius-card: 18px;
            --radius-sm: 10px;
            --radius-btn: 12px;
            --spacing-section: 80px;
            --spacing-card: 24px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(0, 229, 255, 0.05) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

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

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

        button,
        input {
            font-family: var(--font-sans);
            font-size: 16px;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.82);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 15, 30, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            line-height: 1;
        }

        .nav-logo:hover {
            filter: brightness(1.15);
        }

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

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
        }

        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            transform: translateY(-3px);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

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

        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: var(--accent-cyan);
            transition: var(--transition-base);
            cursor: default;
        }

        .tag:hover {
            background: rgba(0, 229, 255, 0.18);
            border-color: var(--accent-cyan);
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 720px;
        }

        .category-hero {
            padding: 56px 0 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 60%);
            pointer-events: none;
            border-radius: 0 0 40px 40px;
        }

        .category-h1 {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.8px;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .category-h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 60%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 780px;
            position: relative;
            z-index: 1;
        }

        .guide-list-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 32px;
        }

        .guide-list-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: saturate(180%) blur(18px);
            -webkit-backdrop-filter: saturate(180%) blur(18px);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            overflow: hidden;
            padding: 18px;
            align-items: stretch;
        }

        .guide-list-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-cyan);
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.25);
        }

        .guide-thumb {
            flex-shrink: 0;
            width: 140px;
            height: 105px;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.04);
        }

        .guide-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .guide-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .guide-info h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
            transition: var(--transition-base);
        }

        .guide-list-card:hover .guide-info h3 {
            color: var(--accent-cyan);
        }

        .guide-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
            flex-wrap: wrap;
            margin-top: auto;
        }

        .guide-meta .date {
            color: var(--text-muted);
        }

        .guide-meta .label {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: left;
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            position: relative;
        }

        .step-card:hover {
            border-color: var(--border-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            margin-bottom: 14px;
            box-shadow: var(--shadow-glow);
        }

        .step-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .faq-accordion {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: 14px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.25);
        }

        .faq-item.active {
            border-color: var(--border-cyan);
            background: rgba(255, 255, 255, 0.08);
        }

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

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent-cyan);
            transition: var(--transition-base);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 229, 255, 0.25);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.35s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .subscribe-form-wrap {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .subscribe-input {
            flex: 1;
            min-width: 240px;
            padding: 13px 18px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .subscribe-input::placeholder {
            color: var(--text-weak);
        }

        .subscribe-input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
            background: rgba(255, 255, 255, 0.07);
        }

        .site-footer {
            background: rgba(6, 10, 20, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 48px 0 24px;
            margin-top: 72px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 0.8fr;
            gap: 32px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 320px;
        }

        .footer-logo {
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -0.4px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #7DD3FC 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

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

        @media (max-width: 1024px) {
            .guide-list-grid {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .category-h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(10, 15, 30, 0.97);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                transform: translateY(-120%);
                transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 99;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 15px;
                width: 100%;
            }
            .nav-cta {
                font-size: 13px;
                padding: 8px 14px;
            }
            .category-h1 {
                font-size: 28px;
                letter-spacing: -0.3px;
            }
            .category-desc {
                font-size: 15px;
            }
            .guide-thumb {
                width: 110px;
                height: 84px;
            }
            .guide-list-card {
                flex-direction: column;
                padding: 14px;
            }
            .guide-thumb {
                width: 100%;
                height: 160px;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero {
                padding: 40px 0 28px;
            }
            .category-h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .guide-list-card {
                padding: 12px;
            }
            .guide-thumb {
                height: 140px;
            }
            .guide-info h3 {
                font-size: 15px;
            }
            .subscribe-input {
                min-width: 100%;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                font-size: 14px;
                padding: 11px 18px;
            }
            .nav-cta {
                padding: 7px 12px;
                font-size: 12px;
            }
        }