/* roulang page: index */
:root {
            --bg-primary: #0E1118;
            --bg-card: #151B26;
            --accent-main: #F5B301;
            --accent-main-hover: #D49700;
            --accent-secondary: #2DD4BF;
            --text-primary: #E5E7EB;
            --text-secondary: #9CA3AF;
            --border-dim: #1F2530;
            --border-glow: rgba(245, 179, 1, 0.15);
            --border-glow-hover: rgba(245, 179, 1, 0.5);
            --radius-lg: 14px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(14, 17, 24, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.25s ease;
        }

        .nav-logo:hover {
            color: #ffd54a;
        }

        .nav-logo .logo-icon {
            display: inline-block;
            width: 28px;
            height: 28px;
            background: var(--accent-main);
            color: var(--bg-primary);
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }

        .nav-link {
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 6px 4px;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent-main);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--accent-main);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border-dim);
            background: var(--bg-card);
            transition: border-color 0.25s ease;
        }

        .nav-toggle:hover {
            border-color: var(--border-glow-hover);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .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-nav {
            display: none;
            flex-direction: column;
            background: rgba(14, 17, 24, 0.97);
            border-bottom: 1px solid var(--border-dim);
            padding: 16px 24px 24px;
            gap: 6px;
        }

        .mobile-nav .nav-link {
            padding: 12px 8px;
            border-bottom: 1px solid var(--border-dim);
            font-size: 1.05rem;
            display: block;
        }

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

        /* ===== Sections ===== */
        main {
            display: block;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-secondary);
            margin-bottom: 12px;
            padding: 4px 12px;
            border: 1px solid rgba(45, 212, 191, 0.35);
            border-radius: 20px;
            background: rgba(45, 212, 191, 0.08);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .accent-line {
            width: 56px;
            height: 4px;
            background: var(--accent-main);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 0.98rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
            user-select: none;
        }

        .btn-primary {
            background: var(--accent-main);
            color: var(--bg-primary);
            box-shadow: 0 4px 14px rgba(245, 179, 1, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-main-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 179, 1, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(245, 179, 1, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: var(--accent-secondary);
            border: 1px solid var(--accent-secondary);
        }

        .btn-secondary:hover {
            background: rgba(45, 212, 191, 0.1);
            transform: translateY(-2px);
            border-color: #5ee0c9;
            color: #5ee0c9;
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all 0.35s ease;
            box-shadow: var(--shadow-default);
        }

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

        .card-sm {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-default);
        }

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

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 100px;
            padding-bottom: 60px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 17, 24, 0.92) 0%, rgba(14, 17, 24, 0.75) 50%, rgba(14, 17, 24, 0.88) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero h1 .highlight {
            color: var(--accent-main);
            position: relative;
        }

        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 28px;
        }

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

        /* ===== Pain point cards ===== */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .pain-card .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(245, 179, 1, 0.12);
            border: 1px solid rgba(245, 179, 1, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: var(--accent-main);
        }

        /* ===== Solution grid ===== */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 36px;
        }

        .solution-node {
            padding: 20px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            text-align: center;
            transition: border-color 0.3s ease;
        }

        .solution-node:hover {
            border-color: var(--border-glow-hover);
        }

        .solution-node .node-dot {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-secondary);
            margin-bottom: 12px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 36px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 26px 20px;
            text-align: center;
            transition: all 0.35s ease;
            position: relative;
        }

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

        .step-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-main);
            line-height: 1;
            margin-bottom: 12px;
            display: inline-block;
            background: rgba(245, 179, 1, 0.08);
            padding: 12px 16px;
            border-radius: 10px;
        }

        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-secondary);
            position: absolute;
            top: 50%;
            right: -20px;
            transform: translateY(-50%);
            z-index: 2;
            width: 40px;
            height: 40px;
            background: var(--bg-primary);
            border-radius: 50%;
            border: 1px solid var(--border-dim);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .stat-card {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            transition: border-color 0.3s ease;
        }

        .stat-card:hover {
            border-color: var(--border-glow-hover);
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent-main);
            line-height: 1.2;
            letter-spacing: 1px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
            letter-spacing: 1px;
        }

        /* ===== Testimonials ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
            transition: border-color 0.3s ease;
        }

        .testimonial-card:hover {
            border-color: var(--border-glow-hover);
        }

        .testimonial-quote {
            font-size: 1rem;
            color: var(--text-primary);
            line-height: 1.75;
            margin-bottom: 16px;
            font-style: italic;
        }

        .testimonial-quote::before {
            content: '"';
            font-size: 2rem;
            color: var(--accent-main);
            display: block;
            line-height: 1;
            margin-bottom: 8px;
            font-style: normal;
        }

        .testimonial-role {
            font-size: 0.85rem;
            color: var(--accent-secondary);
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* ===== Audience ===== */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 36px;
        }

        .audience-card {
            text-align: center;
            padding: 24px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
        }

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

        .audience-icon {
            font-size: 2rem;
            margin-bottom: 12px;
            display: block;
        }

        .audience-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.75rem;
            background: rgba(45, 212, 191, 0.12);
            color: var(--accent-secondary);
            margin-top: 10px;
            letter-spacing: 0.5px;
        }

        /* ===== News list ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 28px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
        }

        .news-item:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-default);
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--accent-secondary);
            font-weight: 600;
            min-width: 72px;
            letter-spacing: 0.5px;
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-arrow {
            color: var(--accent-secondary);
            font-size: 1.2rem;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .news-item:hover .news-arrow {
            transform: translateX(4px);
        }

        /* ===== Brand intro ===== */
        .brand-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
            margin-top: 28px;
        }

        .brand-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-default);
        }

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

        /* ===== Rankings preview ===== */
        .rankings-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .ranking-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            transition: border-color 0.3s ease;
        }

        .ranking-card:hover {
            border-color: var(--border-glow-hover);
        }

        .ranking-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-dim);
        }

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

        .ranking-pos {
            font-weight: 700;
            color: var(--accent-main);
            font-size: 1.1rem;
            min-width: 32px;
        }

        .ranking-name {
            flex: 1;
            padding: 0 10px;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .ranking-value {
            color: var(--accent-secondary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        /* ===== Topic cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            margin-top: 36px;
        }

        .topic-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            min-height: 260px;
            display: block;
            background-size: cover;
            background-position: center;
            transition: all 0.35s ease;
        }

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

        .topic-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 17, 24, 0.85) 0%, rgba(14, 17, 24, 0.45) 100%);
            z-index: 1;
            transition: background 0.35s ease;
        }

        .topic-card:hover .topic-card-overlay {
            background: linear-gradient(135deg, rgba(14, 17, 24, 0.7) 0%, rgba(14, 17, 24, 0.35) 100%);
        }

        .topic-card-content {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            height: 100%;
            min-height: 260px;
        }

        .topic-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }

        .topic-card p {
            color: rgba(229, 231, 235, 0.85);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 28px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

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

        .faq-item summary {
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: color 0.25s ease;
            user-select: none;
        }

        .faq-item summary:hover {
            color: var(--accent-main);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--accent-secondary);
            font-weight: 500;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.75;
        }

        /* ===== CTA section ===== */
        .cta-section {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(245, 179, 1, 0.08);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(45, 212, 191, 0.06);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 24px;
            position: relative;
            z-index: 1;
        }

        .cta-section .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            position: relative;
            z-index: 1;
        }

        /* ===== Resources ===== */
        .resources-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 36px;
        }

        .resource-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 26px 20px;
            transition: all 0.35s ease;
        }

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

        .resource-icon {
            font-size: 2rem;
            margin-bottom: 14px;
            display: block;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0A0D12;
            border-top: 1px solid var(--border-dim);
            padding: 40px 0;
            margin-top: 40px;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-main);
            margin-bottom: 12px;
        }

        .footer-links {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .footer-links a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

        .footer-links a:hover {
            color: var(--accent-secondary);
        }

        .footer-meta {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.7;
            border-top: 1px solid var(--border-dim);
            padding-top: 16px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 56px;
            }

            .nav-left,
            .nav-right {
                gap: 18px;
            }

            .nav-link {
                font-size: 0.85rem;
            }

            .pain-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .step-arrow {
                display: none;
            }

            .audience-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .resources-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .rankings-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 42px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-nav.show {
                display: flex;
            }

            .nav-wrapper {
                height: 60px;
                justify-content: space-between;
            }

            .nav-logo {
                font-size: 1.25rem;
            }

            .nav-logo .logo-icon {
                width: 24px;
                height: 24px;
                font-size: 0.75rem;
            }

            .hero {
                min-height: auto;
                padding-top: 80px;
                padding-bottom: 40px;
            }

            .hero h1 {
                font-size: 1.75rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .pain-grid,
            .solution-grid,
            .testimonial-grid,
            .rankings-grid,
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .stat-number {
                font-size: 2rem;
            }

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

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

            .news-date {
                min-width: auto;
                margin-right: 8px;
            }

            .news-summary {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
            }

            .cta-section {
                padding: 36px 20px;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-section: 32px;
            }

            .container {
                padding: 0 16px;
            }

            .hero h1 {
                font-size: 1.5rem;
            }

            .hero-subtitle {
                font-size: 0.92rem;
                line-height: 1.7;
            }

            .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
                width: 100%;
            }

            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .stat-number {
                font-size: 1.6rem;
            }

            .stat-label {
                font-size: 0.78rem;
            }

            .audience-grid,
            .resources-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .card,
            .card-sm {
                padding: 20px 16px;
            }

            .news-item {
                padding: 14px 16px;
            }

            .news-title {
                font-size: 0.9rem;
            }

            .rankings-grid {
                gap: 14px;
            }

            .footer-links {
                font-size: 0.8rem;
                gap: 8px;
            }

            .footer-meta {
                font-size: 0.78rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0E1118;
            --bg-card: #151B26;
            --accent-main: #F5B301;
            --accent-main-hover: #D49700;
            --accent-secondary: #2DD4BF;
            --text-primary: #E5E7EB;
            --text-secondary: #9CA3AF;
            --border-dim: #1F2530;
            --border-glow: rgba(245, 179, 1, 0.15);
            --border-glow-hover: rgba(245, 179, 1, 0.5);
            --radius-lg: 14px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 72px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(14, 17, 24, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.25s ease;
        }

        .nav-logo:hover {
            color: #ffd54a;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent-main);
            color: var(--bg-primary);
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 800;
            line-height: 1;
        }

        .nav-link {
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 6px 4px;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent-main);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--accent-main);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border-dim);
            background: var(--bg-card);
            transition: border-color 0.25s ease;
        }

        .nav-toggle:hover {
            border-color: var(--border-glow-hover);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .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-nav {
            display: none;
            flex-direction: column;
            background: rgba(14, 17, 24, 0.97);
            border-bottom: 1px solid var(--border-dim);
            padding: 16px 24px 24px;
            gap: 6px;
        }

        .mobile-nav .nav-link {
            padding: 12px 8px;
            border-bottom: 1px solid var(--border-dim);
            font-size: 1.05rem;
            display: block;
        }

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

        /* ===== Sections ===== */
        main {
            display: block;
            padding-top: 68px;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            color: var(--accent-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 650;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: 0 0 32px 0;
            line-height: 1.8;
            max-width: 720px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 24px 0 0 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .breadcrumb a:hover {
            color: var(--accent-secondary);
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: var(--border-dim);
        }
        .breadcrumb .current {
            color: var(--accent-main);
            font-weight: 600;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            padding: 32px 0 48px;
        }
        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }
        .category-hero .h1-accent {
            display: inline-block;
            width: 56px;
            height: 4px;
            background: var(--accent-main);
            border-radius: 2px;
            margin-bottom: 20px;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.9;
            max-width: 800px;
            margin: 0;
        }

        /* ===== Filter Tags ===== */
        .filter-tags {
            padding: 24px 0 8px;
        }
        .tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .filter-tag {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 999px;
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s ease;
            cursor: default;
        }
        .filter-tag:hover {
            border-color: var(--border-glow-hover);
            color: var(--text-primary);
            background: rgba(245, 179, 1, 0.08);
        }
        .filter-tag.active {
            background: rgba(245, 179, 1, 0.15);
            border-color: var(--accent-main);
            color: var(--accent-main);
            font-weight: 600;
        }

        /* ===== News List Cards ===== */
        .news-list {
            padding: 24px 0 40px;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .news-card .card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border-dim);
        }
        .news-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .news-card .card-date {
            font-size: 0.8rem;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
        }
        .news-card .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin: 0;
        }
        .news-card .card-summary {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }
        .news-card .card-link {
            color: var(--accent-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: color 0.25s ease;
        }
        .news-card .card-link:hover {
            color: #5eead4;
            text-decoration: underline;
        }
        .more-link-wrap {
            margin-top: 28px;
            text-align: center;
        }
        .more-link {
            display: inline-block;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dim);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.25s ease;
        }
        .more-link:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
            background: rgba(45, 212, 191, 0.08);
        }

        /* ===== Featured Picks ===== */
        .featured-picks {
            background: rgba(21, 27, 38, 0.5);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all 0.3s ease;
        }
        .featured-card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .featured-card .card-image {
            width: 100%;
            height: 190px;
            object-fit: cover;
            background: var(--border-dim);
        }
        .featured-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .featured-card .card-tag {
            font-size: 0.75rem;
            color: var(--accent-secondary);
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .featured-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin: 0;
        }
        .featured-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== Data Stats ===== */
        .data-stats {
            padding: 48px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .stat-block {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: all 0.3s ease;
        }
        .stat-block:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-secondary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== Topic Scenes ===== */
        .topic-scenes .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .scene-card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .scene-card .scene-image {
            width: 100%;
            height: 220px;
            object-fit: cover;
            background: var(--border-dim);
        }
        .scene-card .scene-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex: 1;
        }
        .scene-card .scene-tag {
            font-size: 0.8rem;
            color: var(--accent-main);
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .scene-card .scene-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.4;
        }
        .scene-card .scene-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
            flex: 1;
        }
        .scene-card .scene-link {
            color: var(--accent-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: color 0.25s ease;
            align-self: flex-start;
        }
        .scene-card .scene-link:hover {
            color: #5eead4;
            text-decoration: underline;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: rgba(21, 27, 38, 0.5);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        details.faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.25s ease;
        }
        details.faq-item:hover {
            border-color: var(--border-glow-hover);
        }
        details.faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            position: relative;
        }
        details.faq-item summary::-webkit-details-marker {
            display: none;
        }
        details.faq-item summary::after {
            content: '+';
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.5rem;
            color: var(--accent-secondary);
            transition: transform 0.3s ease;
        }
        details.faq-item[open] summary::after {
            content: '−';
            transform: translateY(-50%);
        }
        details.faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0;
        }
        .cta-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            box-shadow: var(--shadow-default);
        }
        .cta-panel h2 {
            font-size: 28px;
            font-weight: 650;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }
        .cta-panel p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin: 0 0 28px 0;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }
        .btn-primary {
            display: inline-block;
            background: var(--accent-main);
            color: var(--bg-primary);
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
        }
        .btn-primary:hover {
            background: var(--accent-main-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 179, 1, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0B0E14;
            border-top: 1px solid var(--border-dim);
            padding: 40px 0;
            margin-top: 0;
        }
        .footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-main);
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .footer-links a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--accent-secondary);
            text-decoration: underline;
        }
        .footer-links span {
            color: var(--border-dim);
        }
        .footer-meta p {
            margin: 4px 0;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 56px;
            }
            .nav-left,
            .nav-right {
                gap: 20px;
            }
            .nav-link {
                font-size: 0.9rem;
            }
            .category-hero h1 {
                font-size: 36px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 42px;
            }
            .nav-wrapper {
                height: 60px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-logo {
                font-size: 1.3rem;
            }
            .mobile-nav {
                display: flex;
            }
            .mobile-nav.open {
                display: flex;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-scenes .scene-grid {
                grid-template-columns: 1fr;
            }
            .cta-panel {
                padding: 36px 20px;
            }
            .cta-panel h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-section: 32px;
            }
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 22px;
            }
            .tags-wrapper {
                gap: 8px;
            }
            .filter-tag {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .news-card .card-image,
            .featured-card .card-image,
            .scene-card .scene-image {
                height: 160px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .footer-links {
                flex-wrap: wrap;
                gap: 8px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0E1118;
            --bg-card: #151B26;
            --accent-main: #F5B301;
            --accent-main-hover: #D49700;
            --accent-secondary: #2DD4BF;
            --text-primary: #E5E7EB;
            --text-secondary: #9CA3AF;
            --border-dim: #1F2530;
            --border-glow: rgba(245, 179, 1, 0.15);
            --border-glow-hover: rgba(245, 179, 1, 0.5);
            --radius-lg: 14px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 72px;
        }
        @media (max-width: 1024px) {
            :root {
                --space-section: 56px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 42px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --space-section: 32px;
            }
        }

        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
            transition: all 0.25s ease;
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(14, 17, 24, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.25s ease;
        }
        .nav-logo:hover {
            color: #ffd54a;
        }
        .nav-logo .logo-icon {
            display: inline-block;
            width: 28px;
            height: 28px;
            background: var(--accent-main);
            color: var(--bg-primary);
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }
        .nav-link {
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 6px 4px;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color 0.25s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent-main);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-link:hover {
            color: var(--text-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--accent-main);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border-dim);
            background: var(--bg-card);
            transition: border-color 0.25s ease;
        }
        .nav-toggle:hover {
            border-color: var(--border-glow-hover);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .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-nav {
            display: none;
            flex-direction: column;
            background: rgba(14, 17, 24, 0.97);
            border-bottom: 1px solid var(--border-dim);
            padding: 16px 24px 24px;
            gap: 6px;
        }
        .mobile-nav .nav-link {
            padding: 12px 8px;
            border-bottom: 1px solid var(--border-dim);
            font-size: 1.05rem;
            display: block;
        }
        .mobile-nav .nav-link:last-child {
            border-bottom: none;
        }

        /* ===== Sections ===== */
        main {
            display: block;
        }
        section {
            padding: var(--space-section) 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--accent-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 1.875rem;
            font-weight: 650;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.375rem;
            }
        }
        .section-subtitle {
            font-size: 1.0625rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 780px;
        }
        .accent-line {
            display: inline-block;
            width: 48px;
            height: 3px;
            background: var(--accent-main);
            border-radius: 2px;
            margin-bottom: 16px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--accent-secondary);
            transition: color 0.25s ease;
        }
        .breadcrumb a:hover {
            color: #5eead4;
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: var(--border-dim);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-default);
            overflow: hidden;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-cover {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-cover {
            transform: scale(1.03);
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-title {
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 8px;
            transition: color 0.25s ease;
        }
        .card:hover .card-title {
            color: var(--accent-main);
        }
        .card-desc {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8125rem;
            color: var(--dim-gray);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(45, 212, 191, 0.12);
            color: var(--accent-secondary);
            border: 1px solid rgba(45, 212, 191, 0.25);
        }
        .card-tag.yellow {
            background: rgba(245, 179, 1, 0.12);
            color: var(--accent-main);
            border-color: rgba(245, 179, 1, 0.25);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-family: inherit;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }
        .btn-primary {
            background: var(--accent-main);
            color: var(--bg-primary);
        }
        .btn-primary:hover {
            background: var(--accent-main-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(245, 179, 1, 0.3);
        }
        .btn-secondary {
            background: transparent;
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }
        .btn-secondary:hover {
            background: rgba(45, 212, 191, 0.1);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.875rem;
        }

        /* ===== Filter Tags ===== */
        .filter-tag {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--border-glow-hover);
            color: var(--text-primary);
        }
        .filter-tag.active {
            background: rgba(245, 179, 1, 0.15);
            border-color: var(--accent-main);
            color: var(--accent-main);
            font-weight: 600;
        }

        /* ===== Data Summary ===== */
        .data-block {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            transition: border-color 0.3s ease;
        }
        .data-block:hover {
            border-color: var(--border-glow-hover);
        }
        .data-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-secondary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .data-label {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== Big Topic Card ===== */
        .topic-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-default);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .topic-card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .topic-card .topic-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
        }
        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(14, 17, 24, 0.2) 0%, rgba(14, 17, 24, 0.92) 85%);
            z-index: 1;
        }
        .topic-card .topic-content {
            position: relative;
            z-index: 2;
            padding: 28px 30px;
            width: 100%;
        }
        .topic-card .topic-title {
            font-size: 1.5rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .topic-card .topic-desc {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--border-glow-hover);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: color 0.25s ease;
        }
        .faq-item summary:hover {
            color: var(--accent-main);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(45, 212, 191, 0.12);
            color: var(--accent-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 600;
            line-height: 1;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: rgba(245, 179, 1, 0.15);
            color: var(--accent-main);
        }
        .faq-answer {
            padding: 0 22px 20px;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-default);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(245, 179, 1, 0.08);
            pointer-events: none;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(45, 212, 191, 0.05);
            pointer-events: none;
        }
        .cta-title {
            font-size: 1.75rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 24px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0A0D14;
            border-top: 1px solid var(--border-dim);
            padding: 40px 0 28px;
            margin-top: 0;
        }
        .footer-brand {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--accent-main);
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: var(--accent-secondary);
            transition: color 0.25s ease;
        }
        .footer-links a:hover {
            color: #5eead4;
            text-decoration: underline;
        }
        .footer-meta {
            font-size: 0.8125rem;
            color: var(--dim-gray);
            line-height: 1.7;
        }
        .footer-meta p {
            margin-bottom: 2px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 18px;
            }
            .nav-link {
                font-size: 0.875rem;
            }
        }
        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-wrapper {
                justify-content: space-between;
            }
            .site-header .container {
                padding: 0 16px;
            }
            .mobile-nav.open {
                display: flex;
            }
            .card-cover {
                height: 180px;
            }
            .topic-card {
                min-height: 220px;
            }
            .topic-card .topic-title {
                font-size: 1.25rem;
            }
            .data-number {
                font-size: 2rem;
            }
            .cta-block {
                padding: 36px 24px;
            }
            .cta-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 1.375rem;
            }
            .card-cover {
                height: 160px;
            }
            .card-body {
                padding: 16px 16px 20px;
            }
            .card-title {
                font-size: 1rem;
            }
            .filter-tag {
                padding: 6px 14px;
                font-size: 0.8125rem;
            }
            .data-number {
                font-size: 1.75rem;
            }
            .topic-card {
                min-height: 200px;
            }
            .topic-card .topic-content {
                padding: 20px;
            }
            .topic-card .topic-title {
                font-size: 1.125rem;
            }
            .faq-item summary {
                padding: 14px 18px;
                font-size: 0.9375rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.875rem;
            }
            .cta-title {
                font-size: 1.25rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.875rem;
            }
            .footer-links {
                gap: 8px;
                font-size: 0.875rem;
            }
        }

/* roulang page: category4 */
:root {
      --bg-primary: #0E1118;
      --bg-card: #151B26;
      --accent-main: #F5B301;
      --accent-main-hover: #D49700;
      --accent-secondary: #2DD4BF;
      --text-primary: #E5E7EB;
      --text-secondary: #9CA3AF;
      --border-dim: #1F2530;
      --border-glow: rgba(245, 179, 1, 0.15);
      --border-glow-hover: rgba(245, 179, 1, 0.5);
      --radius-lg: 14px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --space-section: 72px;
    }
    @media (max-width: 1024px) {
      :root { --space-section: 56px; }
    }
    @media (max-width: 768px) {
      :root { --space-section: 42px; }
    }
    @media (max-width: 640px) {
      :root { --space-section: 32px; }
    }

    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    button:focus-visible,
    a:focus-visible {
      outline: 2px solid var(--accent-secondary);
      outline-offset: 2px;
      border-radius: 4px;
    }

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

    /* Header / Nav */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(14, 17, 24, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dim);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
      gap: 20px;
    }
    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 28px;
      flex: 1;
    }
    .nav-left {
      justify-content: flex-end;
    }
    .nav-right {
      justify-content: flex-start;
    }
    .nav-logo {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--accent-main);
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: color 0.25s ease;
    }
    .nav-logo:hover {
      color: #ffd54a;
    }
    .nav-logo .logo-icon {
      display: inline-block;
      width: 28px;
      height: 28px;
      background: var(--accent-main);
      color: var(--bg-primary);
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      line-height: 1;
    }
    .nav-link {
      font-size: 0.95rem;
      color: var(--text-secondary);
      padding: 6px 4px;
      position: relative;
      white-space: nowrap;
      letter-spacing: 0.5px;
      transition: color 0.25s ease;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 2px;
      background: var(--accent-main);
      border-radius: 2px;
      transition: width 0.3s ease;
    }
    .nav-link:hover {
      color: var(--text-primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link.active {
      color: var(--accent-main);
      font-weight: 600;
    }
    .nav-link.active::after {
      width: 100%;
    }
    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 6px;
      border: 1px solid var(--border-dim);
      background: var(--bg-card);
      transition: border-color 0.25s ease;
    }
    .nav-toggle:hover {
      border-color: var(--border-glow-hover);
    }
    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-primary);
      border-radius: 2px;
      transition: all 0.3s ease;
    }
    .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-nav {
      display: none;
      flex-direction: column;
      background: rgba(14, 17, 24, 0.97);
      border-bottom: 1px solid var(--border-dim);
      padding: 16px 24px 24px;
      gap: 6px;
    }
    .mobile-nav .nav-link {
      padding: 12px 8px;
      border-bottom: 1px solid var(--border-dim);
      font-size: 1.05rem;
      display: block;
    }
    .mobile-nav .nav-link:last-child {
      border-bottom: none;
    }

    /* Breadcrumb */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .breadcrumb a {
      color: var(--accent-secondary);
      transition: color 0.25s ease;
    }
    .breadcrumb a:hover {
      color: #5eead4;
      text-decoration: underline;
    }
    .breadcrumb .separator {
      color: var(--text-secondary);
      opacity: 0.6;
    }

    /* Section general */
    section {
      padding: var(--space-section) 0;
      position: relative;
    }
    .section-label {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 1px;
      color: var(--accent-secondary);
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-primary);
      margin-bottom: 16px;
    }

    /* Filter chips */
    .filter-chip {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      border-radius: 999px;
      border: 1px solid var(--border-dim);
      background: var(--bg-card);
      color: var(--text-secondary);
      font-size: 0.9rem;
      font-weight: 500;
      transition: all 0.25s ease;
      cursor: default;
    }
    .filter-chip:hover {
      border-color: var(--border-glow-hover);
      color: var(--text-primary);
      background: rgba(245, 179, 1, 0.08);
    }
    .filter-chip.active {
      border-color: var(--accent-main);
      color: var(--accent-main);
      background: rgba(245, 179, 1, 0.12);
    }

    /* Cards */
    .strategy-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-default);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .strategy-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-hover);
    }
    .strategy-card .card-image {
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #0B0F15;
    }
    .strategy-card .card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .strategy-card:hover .card-image img {
      transform: scale(1.04);
    }
    .strategy-card .card-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .card-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--accent-secondary);
      background: rgba(45, 212, 191, 0.12);
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
      letter-spacing: 0.3px;
    }
    .card-title {
      font-size: 1.1rem;
      font-weight: 600;
      line-height: 1.5;
      color: var(--text-primary);
      margin-bottom: 8px;
    }
    .card-excerpt {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .card-meta {
      margin-top: auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-secondary);
    }

    /* Featured cards */
    .featured-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-default);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .featured-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-hover);
    }
    .featured-card .card-image {
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #0B0F15;
    }
    .featured-card .card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .featured-card:hover .card-image img {
      transform: scale(1.04);
    }
    .featured-card .card-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    /* Stats */
    .stat-block {
      text-align: center;
      padding: 28px 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
    }
    .stat-block:hover {
      border-color: var(--border-glow-hover);
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-secondary);
      line-height: 1.2;
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 0.95rem;
      color: var(--text-secondary);
    }

    /* Topic cards */
    .topic-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      min-height: 260px;
      display: flex;
      align-items: flex-end;
      background: #0B0F15;
      border: 1px solid var(--border-dim);
      transition: all 0.3s ease;
    }
    .topic-card:hover {
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-hover);
    }
    .topic-card img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.5;
    }
    .topic-card .topic-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(14,17,24,0.95) 20%, rgba(14,17,24,0.4) 70%);
    }
    .topic-card .topic-content {
      position: relative;
      z-index: 2;
      padding: 28px;
    }

    /* FAQ */
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s ease;
      margin-bottom: 16px;
    }
    .faq-item:hover {
      border-color: var(--border-glow-hover);
    }
    .faq-item summary {
      list-style: none;
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      color: var(--text-primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      transition: color 0.25s ease;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary:hover {
      color: var(--accent-secondary);
    }
    .faq-item .faq-icon {
      font-size: 1.5rem;
      font-weight: 300;
      color: var(--accent-main);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }
    .faq-item[open] .faq-icon {
      transform: rotate(45deg);
    }
    .faq-item .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.8;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, rgba(245,179,1,0.08) 0%, rgba(45,212,191,0.06) 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 48px 24px;
      text-align: center;
    }

    /* Buttons */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      background: var(--accent-main);
      color: var(--bg-primary);
      font-weight: 600;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      letter-spacing: 0.5px;
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      background: var(--accent-main-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(245, 179, 1, 0.25);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      background: transparent;
      color: var(--accent-secondary);
      font-weight: 600;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      letter-spacing: 0.5px;
      border: 1px solid var(--accent-secondary);
      transition: all 0.3s ease;
    }
    .btn-secondary:hover {
      background: rgba(45, 212, 191, 0.1);
      transform: translateY(-2px);
    }

    /* Footer */
    .site-footer {
      background: #0B0F15;
      border-top: 1px solid var(--border-dim);
      padding: 40px 0;
      margin-top: 40px;
    }
    .footer-brand {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent-main);
      letter-spacing: 1px;
      margin-bottom: 16px;
    }
    .footer-links {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-secondary);
      margin-bottom: 16px;
    }
    .footer-links a {
      color: var(--text-secondary);
      transition: color 0.25s ease;
    }
    .footer-links a:hover {
      color: var(--accent-secondary);
    }
    .footer-meta {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.8;
    }

    /* Responsive nav */
    @media (max-width: 900px) {
      .nav-left, .nav-right {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .nav-wrapper {
        justify-content: space-between;
      }
      .nav-logo {
        margin-left: auto;
        margin-right: auto;
      }
      .mobile-nav.open {
        display: flex;
      }
    }

/* roulang page: category3 */
:root {
            --bg-primary: #0E1118;
            --bg-card: #151B26;
            --accent-main: #F5B301;
            --accent-main-hover: #D49700;
            --accent-secondary: #2DD4BF;
            --text-primary: #E5E7EB;
            --text-secondary: #9CA3AF;
            --border-dim: #1F2530;
            --border-glow: rgba(245, 179, 1, 0.15);
            --border-glow-hover: rgba(245, 179, 1, 0.5);
            --radius-lg: 14px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 72px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(14, 17, 24, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.25s ease;
        }

        .nav-logo:hover {
            color: #ffd54a;
        }

        .nav-logo .logo-icon {
            display: inline-block;
            width: 28px;
            height: 28px;
            background: var(--accent-main);
            color: var(--bg-primary);
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }

        .nav-link {
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 6px 4px;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent-main);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--accent-main);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border-dim);
            background: var(--bg-card);
            transition: border-color 0.25s ease;
        }

        .nav-toggle:hover {
            border-color: var(--border-glow-hover);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .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-nav {
            display: none;
            flex-direction: column;
            background: rgba(14, 17, 24, 0.97);
            border-bottom: 1px solid var(--border-dim);
            padding: 16px 24px 24px;
            gap: 6px;
        }

        .mobile-nav .nav-link {
            padding: 12px 8px;
            border-bottom: 1px solid var(--border-dim);
            font-size: 1.05rem;
            display: block;
        }

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

        /* ===== Sections ===== */
        main {
            display: block;
            padding-top: 68px;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-secondary);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }

        .section-subtitle {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 32px 0;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

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

        .breadcrumb .separator {
            color: var(--border-dim);
            font-size: 0.8rem;
        }

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

        /* ===== Category Header ===== */
        .category-header {
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-dim);
        }

        .category-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0 0 16px 0;
            position: relative;
            display: inline-block;
        }

        .category-header h1::after {
            content: '';
            display: block;
            width: 64px;
            height: 3px;
            background: var(--accent-main);
            border-radius: 2px;
            margin-top: 10px;
        }

        .category-header .lead {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 780px;
            margin-top: 16px;
        }

        /* ===== Filter Tags ===== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding: 24px 0 16px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 999px;
            border: 1px solid var(--border-dim);
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            transition: all 0.25s ease;
            cursor: pointer;
        }

        .filter-tag:hover {
            border-color: var(--border-glow-hover);
            color: var(--text-primary);
            background: rgba(245, 179, 1, 0.06);
        }

        .filter-tag.active-tag {
            background: var(--accent-main);
            color: var(--bg-primary);
            border-color: var(--accent-main);
            font-weight: 600;
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 8px;
        }

        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow-hover);
            transform: translateY(-3px);
        }

        .guide-card .card-image {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
            background: var(--border-dim);
        }

        .guide-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

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

        .guide-card .card-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(to top, rgba(14, 17, 24, 0.7), transparent);
            pointer-events: none;
        }

        .guide-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(14, 17, 24, 0.85);
            border: 1px solid var(--border-glow);
            color: var(--accent-main);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
        }

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

        .guide-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin: 0;
            transition: color 0.25s ease;
        }

        .guide-card:hover .card-body h3 {
            color: var(--accent-main);
        }

        .guide-card .card-body p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0;
            flex: 1;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-secondary);
            border-top: 1px solid var(--border-dim);
            padding-top: 12px;
            margin-top: 6px;
        }

        .guide-card .card-meta .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .guide-card .card-meta .meta-date svg {
            width: 14px;
            height: 14px;
            fill: var(--text-secondary);
        }

        .guide-card .card-link {
            color: var(--accent-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .guide-card .card-link:hover {
            color: #5eead4;
            text-decoration: underline;
        }

        /* ===== More Link ===== */
        .more-link-wrap {
            text-align: center;
            padding-top: 28px;
            margin-top: 8px;
        }

        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dim);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s ease;
        }

        .more-link:hover {
            border-color: var(--border-glow-hover);
            color: var(--accent-main);
            background: rgba(245, 179, 1, 0.05);
        }

        /* ===== Featured Section ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 8px;
        }

        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all 0.35s ease;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow-hover);
            transform: translateY(-3px);
        }

        .featured-card .featured-image {
            width: 100%;
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--border-dim);
        }

        .featured-card .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

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

        .featured-card .featured-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: var(--accent-main);
            color: var(--bg-primary);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: 1px;
        }

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

        .featured-card .featured-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            transition: color 0.25s ease;
        }

        .featured-card:hover .featured-body h3 {
            color: var(--accent-main);
        }

        .featured-card .featured-body p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border-dim);
            border-bottom: 1px solid var(--border-dim);
        }

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

        .stat-block {
            text-align: center;
            padding: 20px 16px;
            border-radius: var(--radius-md);
            background: rgba(14, 17, 24, 0.6);
            border: 1px solid var(--border-dim);
            transition: border-color 0.25s ease;
        }

        .stat-block:hover {
            border-color: var(--border-glow-hover);
        }

        .stat-block .stat-number {
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--accent-secondary);
            letter-spacing: 1px;
        }

        .stat-block .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 4px;
            letter-spacing: 1px;
        }

        /* ===== Topic Cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 8px;
        }

        .topic-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            min-height: 240px;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        .topic-card:hover {
            border-color: var(--border-glow-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .topic-card .topic-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .topic-card:hover .topic-bg {
            transform: scale(1.03);
        }

        .topic-card .topic-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to top, rgba(14, 17, 24, 0.92) 20%, rgba(14, 17, 24, 0.4) 70%, rgba(14, 17, 24, 0.15) 100%);
            pointer-events: none;
        }

        .topic-card .topic-content {
            position: relative;
            z-index: 3;
            padding: 28px 28px 24px;
        }

        .topic-card .topic-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0 0 10px 0;
        }

        .topic-card .topic-content p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(229, 231, 235, 0.8);
            margin: 0 0 14px 0;
            max-width: 90%;
        }

        .topic-card .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-secondary);
            font-size: 0.88rem;
            font-weight: 600;
            transition: color 0.25s ease;
        }

        .topic-card .topic-link:hover {
            color: #5eead4;
            text-decoration: underline;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 8px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.3px;
            list-style: none;
            transition: color 0.25s ease;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--accent-main);
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 1px solid var(--border-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: var(--accent-main);
            transition: all 0.3s ease;
            margin-left: 12px;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-main);
            background: rgba(245, 179, 1, 0.1);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.92rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .faq-item .faq-answer p {
            margin: 0;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0;
        }

        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-default);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 140%;
            height: 220%;
            background: radial-gradient(ellipse at center, rgba(245, 179, 1, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            position: relative;
            z-index: 2;
        }

        .cta-box p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-main);
            color: var(--bg-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(245, 179, 1, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-main-hover);
            box-shadow: 0 6px 16px rgba(245, 179, 1, 0.35);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(245, 179, 1, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: rgba(45, 212, 191, 0.1);
            border-color: #5eead4;
            color: #5eead4;
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-dim);
            padding: 40px 0 32px;
            margin-top: 0;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-main);
            letter-spacing: 1px;
            margin-bottom: 16px;
            text-align: center;
        }

        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .footer-links a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

        .footer-links a:hover {
            color: var(--accent-secondary);
        }

        .footer-links span {
            color: var(--border-dim);
        }

        .footer-meta {
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .footer-meta p {
            margin: 2px 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 56px;
            }

            .nav-left,
            .nav-right {
                gap: 18px;
            }

            .nav-link {
                font-size: 0.88rem;
            }

            .category-header h1 {
                font-size: 2.1rem;
            }

            .section-title {
                font-size: 1.75rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 42px;
            }

            .nav-wrapper {
                height: 60px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-logo {
                margin: 0 auto;
                font-size: 1.3rem;
            }

            .mobile-nav {
                display: none;
            }

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

            .category-header h1 {
                font-size: 1.8rem;
            }

            .section-title {
                font-size: 1.55rem;
            }

            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .featured-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }

            .stat-block .stat-number {
                font-size: 1.6rem;
            }

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

            .featured-card .featured-image {
                height: 150px;
            }

            .topic-card {
                min-height: 200px;
            }

            .cta-box {
                padding: 36px 20px;
            }

            .cta-box h2 {
                font-size: 1.5rem;
            }

            .faq-item summary {
                padding: 15px 18px;
                font-size: 0.95rem;
            }

            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }

            .filter-tags {
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-section: 32px;
            }

            .container {
                padding: 0 16px;
            }

            .category-header h1 {
                font-size: 1.55rem;
            }

            .category-header .lead {
                font-size: 0.95rem;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .section-subtitle {
                font-size: 0.95rem;
            }

            .cards-grid {
                gap: 12px;
            }

            .featured-grid {
                gap: 12px;
            }

            .topic-grid {
                gap: 12px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .stat-block {
                padding: 14px 10px;
            }

            .stat-block .stat-number {
                font-size: 1.35rem;
            }

            .stat-block .stat-label {
                font-size: 0.78rem;
            }

            .guide-card .card-body {
                padding: 16px 16px 18px;
            }

            .guide-card .card-body h3 {
                font-size: 1rem;
            }

            .featured-card .featured-body {
                padding: 14px 16px;
            }

            .topic-card .topic-content {
                padding: 20px 20px 18px;
            }

            .topic-card .topic-content h3 {
                font-size: 1.15rem;
            }

            .filter-tag {
                padding: 6px 14px;
                font-size: 0.78rem;
            }

            .cta-box {
                padding: 28px 16px;
            }

            .cta-box h2 {
                font-size: 1.3rem;
            }

            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 0.88rem;
                width: 100%;
                justify-content: center;
            }

            .cta-actions {
                flex-direction: column;
                gap: 10px;
                width: 100%;
            }

            .footer-brand {
                font-size: 1.15rem;
            }

            .footer-links {
                font-size: 0.82rem;
                gap: 8px;
            }

            .footer-meta {
                font-size: 0.75rem;
            }
        }

/* roulang page: category5 */
:root {
      --bg-primary: #0E1118;
      --bg-card: #151B26;
      --accent-main: #F5B301;
      --accent-main-hover: #D49700;
      --accent-secondary: #2DD4BF;
      --text-primary: #E5E7EB;
      --text-secondary: #9CA3AF;
      --border-dim: #1F2530;
      --border-glow: rgba(245, 179, 1, 0.15);
      --border-glow-hover: rgba(245, 179, 1, 0.5);
      --radius-lg: 14px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --shadow-default: 0 4px 12px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 8px 20px rgba(245, 179, 1, 0.2);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --space-section: 72px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      margin: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    button:focus-visible,
    a:focus-visible {
      outline: 2px solid var(--accent-secondary);
      outline-offset: 2px;
      border-radius: 4px;
    }

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

    /* ===== Header / Nav ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(14, 17, 24, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dim);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
      gap: 20px;
    }

    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 28px;
      flex: 1;
    }

    .nav-left {
      justify-content: flex-end;
    }

    .nav-right {
      justify-content: flex-start;
    }

    .nav-logo {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--accent-main);
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: color 0.25s ease;
    }

    .nav-logo:hover {
      color: #ffd54a;
    }

    .nav-logo .logo-icon {
      display: inline-block;
      width: 28px;
      height: 28px;
      background: var(--accent-main);
      color: var(--bg-primary);
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      line-height: 1;
    }

    .nav-link {
      font-size: 0.95rem;
      color: var(--text-secondary);
      padding: 6px 4px;
      position: relative;
      white-space: nowrap;
      letter-spacing: 0.5px;
      transition: color 0.25s ease;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 2px;
      background: var(--accent-main);
      border-radius: 2px;
      transition: width 0.3s ease;
    }

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

    .nav-link:hover::after {
      width: 100%;
    }

    .nav-link.active {
      color: var(--accent-main);
      font-weight: 600;
    }

    .nav-link.active::after {
      width: 100%;
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 6px;
      border: 1px solid var(--border-dim);
      background: var(--bg-card);
      transition: border-color 0.25s ease;
    }

    .nav-toggle:hover {
      border-color: var(--border-glow-hover);
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-primary);
      border-radius: 2px;
      transition: all 0.3s ease;
    }

    .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-nav {
      display: none;
      flex-direction: column;
      background: rgba(14, 17, 24, 0.97);
      border-bottom: 1px solid var(--border-dim);
      padding: 16px 24px 24px;
      gap: 6px;
    }

    .mobile-nav .nav-link {
      padding: 12px 8px;
      border-bottom: 1px solid var(--border-dim);
      font-size: 1.05rem;
      display: block;
    }

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

    /* ===== Sections ===== */
    main {
      display: block;
      padding-top: 68px;
    }

    section {
      padding: var(--space-section) 0;
      position: relative;
    }

    .section-alt {
      background: #111720;
    }

    .section-label {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      color: var(--accent-secondary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 650;
      line-height: 1.35;
      color: var(--text-primary);
      margin: 0 0 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 720px;
      margin: 0;
    }

    .h1-title {
      font-size: 40px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-primary);
      margin: 0 0 12px;
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .h1-accent {
      display: inline-block;
      width: 6px;
      height: 36px;
      background: var(--accent-main);
      border-radius: 3px;
      flex-shrink: 0;
    }

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

    .breadcrumb a {
      color: var(--accent-secondary);
      transition: color 0.25s;
    }

    .breadcrumb a:hover {
      color: #5ee7d8;
      text-decoration: underline;
    }

    .breadcrumb .separator {
      color: #4B5563;
    }

    .breadcrumb .current {
      color: var(--text-secondary);
    }

    /* ===== Buttons ===== */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--accent-main);
      color: var(--bg-primary);
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 12px 24px;
      font-size: 1rem;
      letter-spacing: 0.5px;
      transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
      border: none;
      cursor: pointer;
      white-space: nowrap;
      gap: 8px;
    }

    .btn-primary:hover {
      background: var(--accent-main-hover);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-primary:focus-visible {
      outline: 2px solid var(--accent-secondary);
      outline-offset: 2px;
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      border: 1px solid var(--accent-secondary);
      color: var(--accent-secondary);
      border-radius: var(--radius-sm);
      padding: 12px 24px;
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.5px;
      transition: background-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
      cursor: pointer;
      white-space: nowrap;
      gap: 8px;
    }

    .btn-secondary:hover {
      background: rgba(45, 212, 191, 0.1);
      color: #5ee7d8;
      transform: translateY(-2px);
    }

    .btn-secondary:focus-visible {
      outline: 2px solid var(--accent-main);
      outline-offset: 2px;
    }

    .text-link {
      color: var(--accent-secondary);
      font-weight: 500;
      transition: color 0.25s ease;
    }

    .text-link:hover {
      color: #5ee7d8;
      text-decoration: underline;
    }

    /* ===== Cards ===== */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-default);
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
      overflow: hidden;
    }

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

    .card-image {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      background: #1A2335;
    }

    .card-body {
      padding: 20px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text-primary);
      margin: 0 0 8px;
    }

    .card-summary {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin: 0;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.5px;
      background: rgba(245, 179, 1, 0.1);
      color: var(--accent-main);
      border: 1px solid rgba(245, 179, 1, 0.2);
    }

    .tag-secondary {
      background: rgba(45, 212, 191, 0.1);
      color: var(--accent-secondary);
      border-color: rgba(45, 212, 191, 0.2);
    }

    .tag-muted {
      background: rgba(156, 163, 175, 0.1);
      color: var(--text-secondary);
      border-color: rgba(156, 163, 175, 0.15);
    }

    .badge-rank {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 32px;
      height: 32px;
      padding: 0 8px;
      border-radius: 8px;
      font-weight: 700;
      font-size: 0.9rem;
      background: rgba(245, 179, 1, 0.12);
      color: var(--accent-main);
      border: 1px solid rgba(245, 179, 1, 0.3);
    }

    /* ===== List items / ranking rows ===== */
    .rank-row {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }

    .rank-row:hover {
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-hover);
      transform: translateX(4px);
    }

    .rank-number {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--accent-main);
      min-width: 36px;
      text-align: center;
    }

    .rank-info {
      flex: 1;
      min-width: 0;
    }

    .rank-name {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 4px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .rank-detail {
      font-size: 0.85rem;
      color: var(--text-secondary);
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .rank-value {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--accent-secondary);
      white-space: nowrap;
    }

    .rank-trend {
      font-size: 0.8rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 999px;
      background: rgba(45, 212, 191, 0.08);
      color: var(--accent-secondary);
      white-space: nowrap;
    }

    .rank-trend.up {
      background: rgba(45, 212, 191, 0.1);
      color: var(--accent-secondary);
    }

    .rank-trend.down {
      background: rgba(245, 179, 1, 0.1);
      color: var(--accent-main);
    }

    /* ===== Filter chips ===== */
    .filter-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .chip {
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 500;
      background: transparent;
      border: 1px solid var(--border-dim);
      color: var(--text-secondary);
      transition: all 0.25s ease;
      cursor: pointer;
      white-space: nowrap;
    }

    .chip:hover {
      border-color: var(--accent-secondary);
      color: var(--accent-secondary);
      background: rgba(45, 212, 191, 0.05);
    }

    .chip.active {
      background: var(--accent-main);
      color: var(--bg-primary);
      border-color: var(--accent-main);
      font-weight: 600;
    }

    /* ===== Stat blocks ===== */
    .stat-block {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .stat-block:hover {
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-hover);
    }

    .stat-value {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent-secondary);
      line-height: 1.2;
      margin-bottom: 4px;
    }

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

    /* ===== Featured card ===== */
    .featured-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dim);
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }

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

    .featured-card-image {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      background: #1A2335;
    }

    .featured-card-body {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 20px;
      background: linear-gradient(to top, rgba(14, 17, 24, 0.95), rgba(14, 17, 24, 0.4), transparent);
    }

    .featured-card-title {
      font-size: 1.2rem;
      font-weight: 600;
      color: var(--text-primary);
      margin: 0 0 6px;
    }

    .featured-card-desc {
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin: 0;
      line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.3s ease;
    }

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

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 20px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-primary);
      cursor: pointer;
      background: transparent;
      border: none;
      text-align: left;
      transition: background-color 0.25s ease;
    }

    .faq-question:hover {
      background: rgba(245, 179, 1, 0.03);
    }

    .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 6px;
      background: rgba(245, 179, 1, 0.1);
      color: var(--accent-main);
      font-size: 1.2rem;
      font-weight: 700;
      transition: transform 0.3s ease;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      padding: 0 20px;
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.8;
    }

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

    /* ===== CTA band ===== */
    .cta-band {
      background: linear-gradient(135deg, #1A2027 0%, #151B26 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      text-align: center;
      box-shadow: var(--shadow-default);
    }

    .cta-title {
      font-size: 30px;
      font-weight: 650;
      line-height: 1.35;
      margin: 0 0 12px;
      color: var(--text-primary);
    }

    .cta-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 560px;
      margin: 0 auto 24px;
      line-height: 1.8;
    }

    .cta-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #0A0D13;
      border-top: 1px solid var(--border-dim);
      padding: 40px 0;
      margin-top: 0;
    }

    .footer-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
      text-align: center;
    }

    .footer-brand {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent-main);
      letter-spacing: 1px;
    }

    .footer-links {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .footer-links a {
      color: var(--text-secondary);
      transition: color 0.25s ease;
    }

    .footer-links a:hover {
      color: var(--accent-secondary);
      text-decoration: underline;
    }

    .footer-meta {
      display: flex;
      flex-direction: column;
      gap: 6px;
      font-size: 0.85rem;
      color: var(--text-secondary);
    }

    .footer-meta p {
      margin: 0;
    }

    /* ===== Decorative ===== */
    .divider-light {
      height: 1px;
      background: var(--border-dim);
      width: 100%;
      margin: 0;
    }

    .accent-line {
      width: 60px;
      height: 4px;
      background: var(--accent-main);
      border-radius: 2px;
      margin-bottom: 16px;
    }

    .accent-line.center {
      margin-left: auto;
      margin-right: auto;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      :root {
        --space-section: 56px;
      }

      .h1-title {
        font-size: 34px;
      }

      .section-title {
        font-size: 26px;
      }

      .nav-left,
      .nav-right {
        gap: 18px;
      }

      .cta-title {
        font-size: 26px;
      }
    }

    @media (max-width: 768px) {
      :root {
        --space-section: 42px;
      }

      .nav-wrapper {
        height: 60px;
      }

      .nav-left,
      .nav-right {
        display: none;
      }

      .nav-toggle {
        display: flex;
      }

      .nav-logo {
        font-size: 1.3rem;
        margin: 0 auto;
      }

      .mobile-nav {
        display: flex;
      }

      .mobile-nav.hidden {
        display: none;
      }

      .h1-title {
        font-size: 28px;
        gap: 8px;
      }

      .h1-accent {
        height: 24px;
        width: 4px;
      }

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

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

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

      .rank-row {
        flex-wrap: wrap;
        gap: 10px;
        padding: 14px 16px;
      }

      .rank-number {
        min-width: 28px;
        font-size: 1.1rem;
      }

      .rank-name {
        font-size: 0.9rem;
      }

      .rank-value {
        font-size: 0.85rem;
      }

      .stat-value {
        font-size: 1.8rem;
      }

      .featured-card-body {
        padding: 16px;
      }

      .featured-card-title {
        font-size: 1.05rem;
      }

      .faq-question {
        font-size: 0.95rem;
        padding: 15px 16px;
      }

      .faq-answer {
        font-size: 0.85rem;
      }

      .btn-primary,
      .btn-secondary {
        padding: 10px 18px;
        font-size: 0.9rem;
      }

      .filter-chips {
        gap: 8px;
      }

      .chip {
        padding: 6px 14px;
        font-size: 0.8rem;
      }
    }

    @media (max-width: 520px) {
      :root {
        --space-section: 32px;
      }

      .container {
        padding: 0 16px;
      }

      .h1-title {
        font-size: 24px;
      }

      .section-title {
        font-size: 20px;
      }

      .card-body {
        padding: 16px;
      }

      .card-title {
        font-size: 16px;
      }

      .stat-block {
        padding: 16px;
      }

      .stat-value {
        font-size: 1.5rem;
      }

      .cta-band {
        padding: 24px 16px;
      }

      .cta-title {
        font-size: 20px;
      }

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

      .btn-primary,
      .btn-secondary {
        width: 100%;
        justify-content: center;
      }

      .footer-brand {
        font-size: 1.2rem;
      }

      .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        font-size: 0.8rem;
      }

      .footer-meta {
        font-size: 0.75rem;
      }
    }