/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a73e8;
            --primary-dark: #0d47a1;
            --primary-light: #4a9ff5;
            --accent: #ff6b35;
            --accent-light: #ff8f5e;
            --accent-dark: #e05520;
            --bg-dark: #0b0e1a;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --bg-surface: #121626;
            --text-primary: #f0f4ff;
            --text-secondary: rgba(240, 244, 255, 0.75);
            --text-muted: rgba(240, 244, 255, 0.45);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-primary);
        }

        /* ===== Utility ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 48px;
            line-height: 1.7;
        }
        .text-center {
            text-align: center;
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .badge-primary {
            background: rgba(26, 115, 232, 0.2);
            border-color: rgba(26, 115, 232, 0.3);
            color: var(--primary-light);
        }
        .badge-accent {
            background: rgba(255, 107, 53, 0.2);
            border-color: rgba(255, 107, 53, 0.3);
            color: var(--accent-light);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 115, 232, 0.35);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-color);
        }
        .btn-outline:hover {
            background: var(--bg-card);
            border-color: var(--border-hover);
            transform: translateY(-2px);
            color: var(--text-primary);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 14, 26, 0.82);
            backdrop-filter: blur(16px) saturate(1.2);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(11, 14, 26, 0.94);
            box-shadow: var(--shadow-sm);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.02em;
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .nav-logo:hover {
            color: var(--text-primary);
        }
        .nav-logo span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
            background: transparent;
            border: 1px solid transparent;
        }
        .nav-link i {
            font-size: 1rem;
            opacity: 0.7;
        }
        .nav-link:hover {
            background: var(--bg-card);
            color: var(--text-primary);
            border-color: var(--border-color);
        }
        .nav-link.active {
            background: rgba(26, 115, 232, 0.15);
            border-color: rgba(26, 115, 232, 0.25);
            color: var(--primary-light);
        }
        .nav-link.active i {
            opacity: 1;
            color: var(--primary-light);
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--primary-light);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            filter: saturate(0.8) brightness(0.6);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 40%, rgba(11, 14, 26, 0.2) 0%, var(--bg-dark) 80%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(255, 107, 53, 0.15);
            border: 1px solid rgba(255, 107, 53, 0.25);
            color: var(--accent-light);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Features / Core ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            background: rgba(26, 115, 232, 0.15);
            color: var(--primary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:nth-child(2) .feature-icon {
            background: rgba(255, 107, 53, 0.15);
            color: var(--accent-light);
        }
        .feature-card:nth-child(3) .feature-icon {
            background: rgba(16, 204, 144, 0.15);
            color: #10cc90;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Category / Channel ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            min-height: 220px;
            display: flex;
            align-items: stretch;
        }
        .category-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card-body {
            padding: 32px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            z-index: 2;
            position: relative;
        }
        .category-card-body .badge {
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .category-card-body h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
        }
        .category-card-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-card-body .btn {
            align-self: flex-start;
        }
        .category-card-media {
            width: 200px;
            min-height: 220px;
            flex-shrink: 0;
            background: url('/assets/images/coverpic/cover-1.png') center center / cover no-repeat;
            position: relative;
        }
        .category-card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to left, transparent 30%, var(--bg-dark) 95%);
        }
        .category-card:nth-child(2) .category-card-media {
            background-image: url('/assets/images/coverpic/cover-2.png');
        }

        /* ===== Latest Posts (CMS) ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .post-card-image {
            height: 180px;
            background: url('/assets/images/coverpic/cover-3.png') center center / cover no-repeat;
            position: relative;
        }
        .post-card-image .badge {
            position: absolute;
            top: 12px;
            left: 12px;
        }
        .post-card:nth-child(2) .post-card-image {
            background-image: url('/assets/images/coverpic/cover-4.png');
        }
        .post-card:nth-child(3) .post-card-image {
            background-image: url('/assets/images/coverpic/cover-5.png');
        }
        .post-card:nth-child(4) .post-card-image {
            background-image: url('/assets/images/coverpic/cover-6.png');
        }
        .post-card:nth-child(5) .post-card-image {
            background-image: url('/assets/images/coverpic/cover-1.png');
        }
        .post-card:nth-child(6) .post-card-image {
            background-image: url('/assets/images/coverpic/cover-2.png');
        }
        .post-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-body .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .post-card-body .post-meta i {
            margin-right: 4px;
        }
        .post-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card-body h3 a {
            color: var(--text-primary);
            transition: var(--transition);
        }
        .post-card-body h3 a:hover {
            color: var(--primary-light);
        }
        .post-card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
        }
        .post-card-body .post-footer {
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }
        .post-card-body .post-footer .btn {
            padding: 6px 16px;
            font-size: 0.8rem;
        }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
            color: var(--text-muted);
            font-size: 1rem;
        }
        .post-empty i {
            font-size: 2rem;
            margin-bottom: 12px;
            display: block;
            opacity: 0.5;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .process-step:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -12px;
            right: 20px;
            font-size: 3.2rem;
            font-weight: 800;
            color: rgba(26, 115, 232, 0.12);
            line-height: 1;
        }
        .process-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(26, 115, 232, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin: 0 auto 16px;
            transition: var(--transition);
        }
        .process-step:nth-child(2) .process-icon {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent-light);
        }
        .process-step:nth-child(3) .process-icon {
            background: rgba(16, 204, 144, 0.12);
            color: #10cc90;
        }
        .process-step:nth-child(4) .process-icon {
            background: rgba(255, 193, 7, 0.12);
            color: #ffc107;
        }
        .process-step h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .process-step p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 16px;
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 6px;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary-light);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-surface);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            filter: blur(2px);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 48px 24px 32px;
        }
        .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 12px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-col ul li a i {
            font-size: 0.7rem;
            opacity: 0.5;
        }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 32px auto 0;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(11, 14, 26, 0.96);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-color);
                padding: 16px 24px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                padding: 14px 18px;
                justify-content: center;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 4px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
            .hero {
                min-height: 80vh;
                padding: 100px 20px 60px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                padding-top: 28px;
                margin-top: 36px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .category-card-media {
                width: 140px;
                min-height: 180px;
            }
            .category-card-body {
                padding: 24px 20px;
            }
            .posts-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .cta-inner {
                padding: 48px 20px;
            }
            .cta-inner h2 {
                font-size: 1.8rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .category-card {
                flex-direction: column;
            }
            .category-card-media {
                width: 100%;
                height: 160px;
                min-height: auto;
            }
            .category-card-media::after {
                background: linear-gradient(to top, var(--bg-dark) 30%, transparent 70%);
            }
            .section-title {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 16px 12px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                padding: 0 16px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Focus Visible ===== */
        :focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Selection ===== */
        ::selection {
            background: rgba(26, 115, 232, 0.3);
            color: #fff;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3cf4;
            --primary-dark: #5228d6;
            --primary-light: #8f6aff;
            --primary-gradient: linear-gradient(135deg, #6c3cf4 0%, #3b82f6 100%);
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg-dark: #0a0a1a;
            --bg-card: #13132b;
            --bg-card-hover: #1a1a3e;
            --bg-elevated: #1e1e42;
            --text-primary: #f1f1f9;
            --text-secondary: #a5a5c9;
            --text-muted: #6b6b9e;
            --border-color: #2a2a5e;
            --border-light: #3a3a7e;
            --shadow-sm: 0 2px 8px rgba(108, 60, 244, 0.15);
            --shadow-md: 0 8px 32px rgba(108, 60, 244, 0.2);
            --shadow-lg: 0 16px 64px rgba(108, 60, 244, 0.3);
            --shadow-glow: 0 0 40px rgba(108, 60, 244, 0.25);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1280px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
        }
        h2 {
            font-size: clamp(1.4rem, 3vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            transition: var(--transition);
        }

        .header.scrolled {
            background: rgba(10, 10, 26, 0.98);
            box-shadow: var(--shadow-md);
        }

        .nav-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }

        .nav-logo i {
            font-size: 1.6rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-logo:hover {
            opacity: 0.85;
            transform: scale(1.02);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }

        .nav-link i {
            font-size: 0.9rem;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(108, 60, 244, 0.1);
        }

        .nav-link.active {
            color: var(--text-primary);
            background: rgba(108, 60, 244, 0.18);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-gradient);
            border-radius: 4px;
        }

        .nav-cta {
            margin-left: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }

        .btn-accent {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
            opacity: 0.95;
        }

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

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--border-light);
            color: var(--text-primary);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(108, 60, 244, 0.1);
            color: var(--text-primary);
        }

        .btn-white {
            background: #fff;
            color: var(--primary-dark);
        }

        .btn-white:hover {
            background: var(--accent-light);
            color: var(--bg-dark);
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: rgba(108, 60, 244, 0.1);
        }

        .nav-toggle:hover {
            background: rgba(108, 60, 244, 0.2);
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            margin-top: var(--header-height);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(10, 10, 26, 0.95) 0%, rgba(30, 30, 66, 0.9) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }

        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            pointer-events: none;
        }

        .article-banner .container {
            position: relative;
            z-index: 2;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

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

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

        .article-breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        .article-breadcrumb .current {
            color: var(--primary-light);
            font-weight: 500;
        }

        .article-meta-top {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(108, 60, 244, 0.2);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(108, 60, 244, 0.3);
        }

        .article-category-badge i {
            font-size: 0.7rem;
        }

        .article-date {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .article-date i {
            font-size: 0.8rem;
        }

        .article-banner h1 {
            font-size: clamp(1.6rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.25;
            max-width: 900px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #f1f1f9 0%, #a5a5c9 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-banner .article-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.6;
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 60px 0 80px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
        }

        .article-content .lead {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .article-content .content-body {
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .article-content .content-body p {
            margin-bottom: 20px;
        }

        .article-content .content-body h2 {
            font-size: 1.5rem;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .article-content .content-body h3 {
            font-size: 1.2rem;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-content .content-body li {
            margin-bottom: 8px;
            list-style: disc;
        }

        .article-content .content-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-content .content-body a:hover {
            color: var(--accent-light);
        }

        .article-content .content-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(108, 60, 244, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content .content-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content .content-body .highlight-box {
            background: rgba(108, 60, 244, 0.08);
            border: 1px solid rgba(108, 60, 244, 0.2);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            margin: 24px 0;
        }

        .article-content .content-body .highlight-box p:last-child {
            margin-bottom: 0;
        }

        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }

        .article-tags .label {
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
        }

        .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(108, 60, 244, 0.1);
            color: var(--text-secondary);
            font-size: 0.8rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .article-tag:hover {
            background: rgba(108, 60, 244, 0.2);
            color: var(--primary-light);
            border-color: var(--primary);
        }

        .article-tag i {
            font-size: 0.65rem;
        }

        .article-nav-links {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            gap: 16px;
        }

        .article-nav-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: rgba(108, 60, 244, 0.05);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            max-width: 45%;
        }

        .article-nav-links a:hover {
            background: rgba(108, 60, 244, 0.12);
            border-color: var(--primary);
            color: var(--text-primary);
        }

        .article-nav-links a.next {
            text-align: right;
            flex-direction: row-reverse;
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h3 i {
            color: var(--primary-light);
            font-size: 1rem;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            background: rgba(108, 60, 244, 0.03);
            border: 1px solid transparent;
            transition: var(--transition);
            cursor: pointer;
        }

        .sidebar-list-item:hover {
            background: rgba(108, 60, 244, 0.08);
            border-color: var(--border-color);
        }

        .sidebar-list-item .thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-elevated);
        }

        .sidebar-list-item .info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-list-item .info .title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 4px;
            transition: var(--transition);
        }

        .sidebar-list-item:hover .info .title {
            color: var(--primary-light);
        }

        .sidebar-list-item .info .date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .sidebar-list-item .badge {
            font-size: 0.65rem;
            padding: 2px 10px;
            border-radius: 12px;
            background: rgba(108, 60, 244, 0.15);
            color: var(--primary-light);
            font-weight: 500;
        }

        .sidebar-cta-box {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            color: #fff;
        }

        .sidebar-cta-box h4 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: #fff;
        }

        .sidebar-cta-box p {
            font-size: 0.9rem;
            opacity: 0.9;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .sidebar-cta-box .btn {
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            padding: 12px 32px;
        }

        .sidebar-cta-box .btn:hover {
            background: var(--accent-light);
            color: var(--bg-dark);
            transform: translateY(-2px);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0 80px;
            background: rgba(10, 10, 26, 0.5);
            border-top: 1px solid var(--border-color);
        }

        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .related-section .section-header h2 {
            font-size: clamp(1.4rem, 3vw, 2rem);
            margin-bottom: 12px;
        }

        .related-section .section-header p {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }

        .related-card .card-body {
            padding: 20px 22px;
        }

        .related-card .card-body .cat {
            font-size: 0.7rem;
            color: var(--primary-light);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body h3 a {
            color: var(--text-primary);
        }

        .related-card .card-body h3 a:hover {
            color: var(--primary-light);
        }

        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }

        .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-primary);
        }

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

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-col ul li a i {
            font-size: 0.6rem;
            color: var(--text-muted);
        }

        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }

        .footer-bottom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 24px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            border-top: 1px solid var(--border-color);
            margin-top: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(108, 60, 244, 0.1);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: var(--transition);
        }

        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: scale(1.1);
        }

        /* ===== 文章未找到 ===== */
        .not-found-article {
            text-align: center;
            padding: 80px 24px;
        }

        .not-found-article i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .not-found-article h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        .not-found-article p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 24px;
        }

        .not-found-article .btn {
            display: inline-flex;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

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

            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-link {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }

            .nav-cta .btn {
                width: 100%;
            }

            .nav-toggle {
                display: block;
            }

            .article-banner {
                padding: 60px 0 40px;
            }

            .article-content {
                padding: 24px 20px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

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

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

            .article-nav-links {
                flex-direction: column;
            }

            .article-nav-links a {
                max-width: 100%;
            }

            .article-nav-links a.next {
                text-align: left;
                flex-direction: row;
            }
        }

        @media (max-width: 520px) {
            .nav-logo span {
                font-size: 1rem;
            }

            .nav-logo i {
                font-size: 1.3rem;
            }

            .article-banner h1 {
                font-size: 1.4rem;
            }

            .article-content .content-body {
                font-size: 0.95rem;
            }

            .article-content .content-body h2 {
                font-size: 1.3rem;
            }

            .article-content .content-body h3 {
                font-size: 1.1rem;
            }

            .sidebar-card {
                padding: 20px 18px;
            }

            .related-card .card-img {
                height: 140px;
            }
        }

        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
                transform: none !important;
                opacity: 1 !important;
                pointer-events: auto !important;
                position: static !important;
                background: none !important;
                backdrop-filter: none !important;
                padding: 0 !important;
                border: none !important;
                box-shadow: none !important;
                flex-direction: row !important;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c3eff;
            --primary-dark: #5225d9;
            --primary-light: #8f66ff;
            --primary-bg: #f2edff;
            --accent: #ff6b35;
            --accent-dark: #e55a2b;
            --accent-light: #ff8f66;
            --bg-dark: #0f0b1a;
            --bg-dark-alt: #1a1530;
            --bg-card-dark: #1e1840;
            --bg-body: #f8f7fc;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #2d2d44;
            --text-weak: #7a7a9a;
            --text-light: #f0edff;
            --text-muted: #b8b0d4;
            --border: #e4e0f0;
            --border-light: #f0edf8;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(108, 62, 255, 0.06);
            --shadow: 0 8px 30px rgba(108, 62, 255, 0.10);
            --shadow-lg: 0 20px 50px rgba(108, 62, 255, 0.15);
            --shadow-accent: 0 8px 30px rgba(255, 107, 53, 0.25);
            --transition: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --spacer: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font);
            color: var(--text-body);
            background: var(--bg-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(15, 11, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }

        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.3px;
        }
        .nav-logo i {
            font-size: 1.6rem;
            color: var(--accent);
            filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.3));
        }
        .nav-logo:hover {
            color: var(--accent-light);
        }
        .nav-logo span {
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            color: var(--text-muted);
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link i {
            font-size: 0.9rem;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.07);
        }
        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 62, 255, 0.35);
        }
        .nav-link.active:hover {
            background: var(--primary-dark);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn i {
            font-size: 0.9rem;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 62, 255, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(108, 62, 255, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            box-shadow: 0 8px 32px rgba(255, 107, 53, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            background: rgba(108, 62, 255, 0.15);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.16);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 120px 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            isolation: isolate;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 11, 26, 0.85) 40%, rgba(108, 62, 255, 0.30) 100%);
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            max-width: 720px;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.8;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .page-banner .breadcrumb a {
            color: var(--primary-light);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacer) 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-dark-alt {
            background: var(--bg-dark-alt);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-weak);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section-header .badge {
            display: inline-block;
            padding: 4px 18px;
            border-radius: 50px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: var(--text-muted);
        }
        .section-dark .section-header .badge {
            background: rgba(108, 62, 255, 0.2);
            color: var(--primary-light);
        }

        /* ===== Guide Steps ===== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .guide-step {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .guide-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .guide-step .step-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-bg);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -2px;
        }
        .guide-step:nth-child(1) .step-number {
            color: rgba(108, 62, 255, 0.12);
        }
        .guide-step:nth-child(2) .step-number {
            color: rgba(108, 62, 255, 0.12);
        }
        .guide-step:nth-child(3) .step-number {
            color: rgba(108, 62, 255, 0.12);
        }
        .guide-step:nth-child(4) .step-number {
            color: rgba(108, 62, 255, 0.12);
        }
        .guide-step h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .guide-step h3 i {
            color: var(--primary);
            font-size: 1.1rem;
        }
        .guide-step p {
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .guide-step .step-icon {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.2rem;
            opacity: 0.08;
            color: var(--primary);
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .card-img {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            box-shadow: 0 4px 12px rgba(108, 62, 255, 0.3);
        }
        .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-weak);
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .card-body .card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
        }
        .card-body .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 4px;
        }
        .card-body .card-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== Features / Icons ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 28px;
        }
        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .feature-item .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-item:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-item h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 11, 26, 0.88) 30%, rgba(108, 62, 255, 0.35) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== Content Section (rich text) ===== */
        .content-rich {
            max-width: 860px;
            margin: 0 auto;
        }
        .content-rich h2 {
            font-size: 1.8rem;
            margin: 40px 0 16px;
        }
        .content-rich h3 {
            font-size: 1.3rem;
            margin: 28px 0 12px;
        }
        .content-rich p {
            margin-bottom: 18px;
            line-height: 1.9;
            color: var(--text-body);
        }
        .content-rich ul {
            list-style: disc;
            padding-left: 24px;
            margin-bottom: 20px;
        }
        .content-rich ul li {
            margin-bottom: 6px;
            line-height: 1.8;
            color: var(--text-body);
        }
        .content-rich .highlight-box {
            background: var(--primary-bg);
            border-radius: var(--radius-sm);
            padding: 24px 28px;
            border-left: 4px solid var(--primary);
            margin: 24px 0;
        }
        .content-rich .highlight-box p {
            margin-bottom: 0;
            color: var(--text-dark);
        }
        .content-rich .highlight-box strong {
            color: var(--primary);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-3px);
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-item .stat-num span {
            color: var(--accent);
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 16px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-col ul li a i {
            font-size: 0.65rem;
            color: var(--primary-light);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 40px auto 0;
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom span {
            opacity: 0.7;
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Mobile Responsive ===== */
        @media (max-width: 1024px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacer: 56px;
                --header-h: 64px;
            }

            .nav-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(15, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                border-radius: 0 0 var(--radius) var(--radius);
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                padding: 12px 18px;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }

            .page-banner {
                padding: 100px 0 48px;
                min-height: 260px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner p {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header p {
                font-size: 1rem;
            }

            .guide-steps {
                grid-template-columns: 1fr;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }

            .cta-section h2 {
                font-size: 1.7rem;
            }

            .content-rich h2 {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                padding: 0 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner p {
                font-size: 0.92rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.88rem;
            }
            .card-body {
                padding: 18px 16px 20px;
            }
            .guide-step {
                padding: 24px 20px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-light);
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade {
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }