/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c2bd9;
            --primary-dark: #5221b0;
            --primary-light: #8b5cf6;
            --primary-glow: rgba(108, 43, 217, 0.3);
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --accent-dark: #059669;
            --bg-dark: #0a0a1a;
            --bg-darker: #060612;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3a;
            --bg-section: #0e0e24;
            --bg-section-alt: #14142e;
            --text-white: #ffffff;
            --text-light: #e2e8f0;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-color: rgba(139, 92, 246, 0.15);
            --border-glow: rgba(139, 92, 246, 0.3);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(108, 43, 217, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

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

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-white);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-light);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--primary-light);
            border-radius: 2px;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 40%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        .text-center {
            text-align: center;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header / Nav ===== */
        .site-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);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(6, 6, 18, 0.96);
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--primary-light);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--text-white);
            background: rgba(139, 92, 246, 0.1);
        }
        .nav-main a.active {
            color: var(--text-white);
            background: rgba(139, 92, 246, 0.15);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-light);
            border-radius: 3px;
        }

        /* Search Bar */
        .search-box {
            flex: 1;
            max-width: 360px;
            min-width: 180px;
            position: relative;
            margin: 0 12px;
        }
        .search-box input {
            width: 100%;
            padding: 10px 16px 10px 44px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            color: var(--text-white);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .search-box input::placeholder {
            color: var(--text-dim);
        }
        .search-box input:focus {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, 0.10);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .search-box .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-dim);
            font-size: 0.95rem;
            pointer-events: none;
        }

        /* Mobile Toggle */
        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-size: 1.4rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            cursor: pointer;
            flex-shrink: 0;
        }
        .mobile-toggle:hover {
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary-light);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(6, 6, 18, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 20px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 12px;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-nav.open {
            display: flex;
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--text-white);
            background: rgba(139, 92, 246, 0.12);
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: 120px 0 80px;
            overflow: hidden;
            background: var(--bg-darker);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 43, 217, 0.20) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(245, 158, 11, 0.10) 0%, transparent 50%),
                linear-gradient(180deg, var(--bg-darker) 0%, transparent 40%, var(--bg-dark) 100%);
            z-index: 2;
        }
        .hero .container {
            position: relative;
            z-index: 3;
            width: 100%;
        }

        .hero-content {
            max-width: 780px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(139, 92, 246, 0.12);
            border: 1px solid rgba(139, 92, 246, 0.25);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary-light);
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 0.8rem;
        }
        .hero h1 {
            font-size: 4rem;
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--primary-light) 70%, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 36px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 24px var(--primary-glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 40px var(--primary-glow);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: var(--primary-light);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 24px rgba(16, 185, 129, 0.25);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 40px rgba(16, 185, 129, 0.35);
            color: #fff;
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 50px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            display: block;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: var(--text-dim);
            margin-top: 2px;
        }

        /* ===== Sections Common ===== */
        section {
            padding: 100px 0;
            position: relative;
        }
        .section-bg-light {
            background: var(--bg-section);
        }
        .section-bg-alt {
            background: var(--bg-section-alt);
        }
        .section-bg-darker {
            background: var(--bg-darker);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-header .section-subtitle {
            margin: 0 auto;
        }

        /* ===== Features / Core Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(139, 92, 246, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(139, 92, 246, 0.20);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Category / Entry Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
            display: block;
            color: inherit;
        }
        .category-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
            color: inherit;
        }
        .category-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .category-card .card-body {
            padding: 20px 22px 24px;
        }
        .category-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .category-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(139, 92, 246, 0.10);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== Latest Posts / CMS List ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-dim);
            margin-bottom: 12px;
        }
        .post-card .post-meta .post-cat {
            padding: 3px 12px;
            border-radius: 50px;
            background: rgba(139, 92, 246, 0.10);
            color: var(--primary-light);
            font-weight: 600;
            font-size: 0.75rem;
        }
        .post-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .post-card h3 a {
            color: var(--text-white);
        }
        .post-card h3 a:hover {
            color: var(--primary-light);
        }
        .post-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            flex: 1;
        }
        .post-card .post-footer {
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-dim);
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }
        .post-card .post-footer a {
            color: var(--primary-light);
            font-weight: 500;
            font-size: 0.85rem;
        }
        .post-card .post-footer a:hover {
            color: var(--secondary);
        }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-dim);
            font-size: 1.1rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-color);
        }

        /* ===== Flow / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 18px;
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== Data / Stats Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
        }
        .stat-item .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .stat-item .stat-num span {
            font-size: 1.4rem;
            color: var(--text-dim);
        }
        .stat-item .stat-label {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            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-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-item.active {
            border-color: var(--primary-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-white);
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--text-dim);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary-light);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            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;
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-box {
            text-align: center;
            padding: 60px 40px;
            background: linear-gradient(135deg, rgba(108, 43, 217, 0.08), rgba(245, 158, 11, 0.05));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            max-width: 800px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            color: var(--text-white);
        }
        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-dim);
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--text-dim);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 3rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
                padding: 0 16px;
            }
            .nav-main {
                display: none;
            }
            .search-box {
                max-width: none;
                min-width: 100px;
                margin: 0 8px;
            }
            .mobile-toggle {
                display: flex;
            }
            .mobile-nav {
                display: flex;
                flex-direction: column;
            }

            .hero {
                padding: 100px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 36px;
                padding-top: 24px;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }

            section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-header {
                margin-bottom: 40px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .posts-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }

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

            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
            }
            .search-box input {
                padding: 8px 12px 8px 36px;
                font-size: 0.82rem;
            }
            .search-box .search-icon {
                left: 12px;
                font-size: 0.8rem;
            }
            .hero h1 {
                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;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #7c3aed;
        --primary-dark: #5b21b6;
        --primary-light: #a78bfa;
        --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
        --secondary: #f59e0b;
        --secondary-light: #fbbf24;
        --accent: #06b6d4;
        --dark: #0f0f1a;
        --dark-2: #1a1a2e;
        --dark-3: #252540;
        --bg: #0b0b16;
        --bg-card: #16162a;
        --bg-card-hover: #1e1e3a;
        --text: #f1f5f9;
        --text-muted: #94a3b8;
        --text-light: #cbd5e1;
        --border: #2a2a4a;
        --border-light: #3a3a5a;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-xs: 6px;
        --shadow: 0 8px 32px rgba(0,0,0,0.4);
        --shadow-sm: 0 4px 16px rgba(0,0,0,0.3);
        --shadow-glow: 0 0 30px rgba(124,58,237,0.15);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --container: 1200px;
        --header-h: 72px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        overflow-x: hidden;
    }
    a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; color: var(--text); }
    button { cursor: pointer; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
    h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
    h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
    h4 { font-size: 1.15rem; }
    p { margin-bottom: 1rem; color: var(--text-light); }
    ::selection { background: var(--primary); color: white; }

    /* ===== Container ===== */
    .container {
        width: 100%;
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) { .container { padding: 0 16px; } }

    /* ===== Header / Nav ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(11,11,22,0.85);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        height: var(--header-h);
        transition: var(--transition);
    }
    .site-header.scrolled { background: rgba(11,11,22,0.96); box-shadow: var(--shadow); }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-h);
        gap: 20px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.4rem;
        font-weight: 800;
        color: var(--text);
        flex-shrink: 0;
        letter-spacing: -0.5px;
    }
    .logo .logo-icon {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: var(--primary-gradient);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: white;
        box-shadow: 0 4px 16px rgba(124,58,237,0.3);
    }
    .logo:hover { color: var(--text); opacity: 0.9; }

    /* 搜索框主导航 */
    .nav-search-wrap {
        flex: 1;
        max-width: 480px;
        position: relative;
        margin: 0 16px;
    }
    .nav-search-wrap .search-icon {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-muted);
        font-size: 0.95rem;
        pointer-events: none;
    }
    .nav-search-wrap input {
        width: 100%;
        height: 44px;
        padding: 0 16px 0 44px;
        border-radius: 50px;
        background: var(--dark-2);
        border: 1px solid var(--border);
        color: var(--text);
        font-size: 0.95rem;
        transition: var(--transition);
    }
    .nav-search-wrap input::placeholder { color: var(--text-muted); }
    .nav-search-wrap input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
        background: var(--dark-3);
    }

    .nav-main {
        display: flex;
        align-items: center;
        gap: 6px;
        flex-shrink: 0;
    }
    .nav-main a {
        padding: 8px 18px;
        border-radius: 50px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-main a:hover { background: rgba(124,58,237,0.12); color: var(--text); }
    .nav-main a.active {
        background: var(--primary-gradient);
        color: white;
        box-shadow: 0 4px 16px rgba(124,58,237,0.3);
    }

    /* 移动端菜单按钮 */
    .menu-toggle {
        display: none;
        width: 44px;
        height: 44px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        background: var(--dark-2);
        color: var(--text);
        font-size: 1.3rem;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        transition: var(--transition);
    }
    .menu-toggle:hover { background: var(--dark-3); border-color: var(--primary); }

    @media (max-width: 1024px) {
        .nav-search-wrap { max-width: 320px; }
    }
    @media (max-width: 768px) {
        .nav-search-wrap { max-width: 200px; }
        .nav-main { display: none; }
        .nav-main.open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(11,11,22,0.98);
            backdrop-filter: blur(20px);
            padding: 16px 24px 24px;
            gap: 8px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .nav-main.open a { width: 100%; text-align: center; padding: 12px 18px; }
        .menu-toggle { display: flex; }
    }
    @media (max-width: 520px) {
        .nav-search-wrap input { height: 40px; font-size: 0.85rem; padding-left: 38px; }
        .nav-search-wrap .search-icon { left: 12px; font-size: 0.85rem; }
        .logo { font-size: 1.15rem; }
        .logo .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
    }

    /* ===== 文章详情页 ===== */
    .article-page {
        padding-top: calc(var(--header-h) + 40px);
        padding-bottom: 60px;
    }

    /* Banner 区域 */
    .article-banner {
        position: relative;
        min-height: 320px;
        display: flex;
        align-items: flex-end;
        padding: 60px 0 40px;
        background: linear-gradient(135deg, var(--dark-2) 0%, var(--dark-3) 100%);
        border-bottom: 1px solid var(--border);
        overflow: hidden;
    }
    .article-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.12;
        z-index: 0;
    }
    .article-banner::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, var(--bg) 0%, transparent 60%);
        z-index: 1;
    }
    .article-banner .container {
        position: relative;
        z-index: 2;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a { color: var(--text-muted); }
    .article-breadcrumb a:hover { color: var(--primary-light); }
    .article-breadcrumb .sep { color: var(--border-light); }
    .article-breadcrumb .current { color: var(--text-light); }

    .article-banner h1 {
        font-size: clamp(1.6rem, 3.2vw, 2.6rem);
        font-weight: 800;
        line-height: 1.25;
        max-width: 900px;
        color: var(--text);
        margin-bottom: 16px;
    }
    .article-meta-bar {
        display: flex;
        align-items: center;
        gap: 20px;
        flex-wrap: wrap;
        font-size: 0.9rem;
        color: var(--text-muted);
    }
    .article-meta-bar .badge {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.8rem;
        font-weight: 600;
        background: var(--primary-gradient);
        color: white;
    }
    .article-meta-bar .meta-item {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta-bar .meta-item i { font-size: 0.85rem; color: var(--primary-light); }

    /* 正文区域 */
    .article-content-wrap {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 40px;
        margin-top: 40px;
    }
    @media (max-width: 1024px) {
        .article-content-wrap { grid-template-columns: 1fr; }
    }

    .article-body {
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        padding: 40px 44px;
        box-shadow: var(--shadow-sm);
    }
    @media (max-width: 768px) {
        .article-body { padding: 24px 20px; }
    }

    .article-body h2 {
        margin-top: 2rem;
        margin-bottom: 1rem;
        padding-bottom: 0.5rem;
        border-bottom: 2px solid var(--border);
        color: var(--text);
    }
    .article-body h3 {
        margin-top: 1.6rem;
        margin-bottom: 0.8rem;
        color: var(--text-light);
    }
    .article-body p {
        margin-bottom: 1.2rem;
        line-height: 1.8;
        color: var(--text-light);
    }
    .article-body ul, .article-body ol {
        margin-bottom: 1.2rem;
        padding-left: 1.6rem;
    }
    .article-body ul li, .article-body ol li {
        margin-bottom: 0.5rem;
        color: var(--text-light);
        list-style: disc;
    }
    .article-body ol li { list-style: decimal; }
    .article-body strong { color: var(--text); font-weight: 600; }
    .article-body blockquote {
        border-left: 4px solid var(--primary);
        padding: 16px 20px;
        margin: 1.5rem 0;
        background: rgba(124,58,237,0.06);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-body img {
        border-radius: var(--radius-sm);
        margin: 1.5rem 0;
        width: 100%;
        object-fit: cover;
        box-shadow: var(--shadow-sm);
    }
    .article-body a { color: var(--secondary); text-decoration: underline; }
    .article-body a:hover { color: var(--secondary-light); }

    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 2rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border);
    }
    .article-tags .tag {
        display: inline-block;
        padding: 6px 16px;
        border-radius: 50px;
        font-size: 0.8rem;
        background: var(--dark-2);
        border: 1px solid var(--border);
        color: var(--text-muted);
        transition: var(--transition);
    }
    .article-tags .tag:hover { background: var(--dark-3); border-color: var(--primary); color: var(--text); }

    .article-nav-links {
        display: flex;
        justify-content: space-between;
        gap: 16px;
        margin-top: 2.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border);
    }
    .article-nav-links a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 20px;
        border-radius: 50px;
        border: 1px solid var(--border);
        color: var(--text-light);
        font-size: 0.9rem;
        transition: var(--transition);
        background: var(--dark-2);
    }
    .article-nav-links a:hover { border-color: var(--primary); background: var(--dark-3); color: var(--text); }

    /* 侧边栏 */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        padding: 24px 26px;
        box-shadow: var(--shadow-sm);
    }
    .sidebar-card h3 {
        font-size: 1.1rem;
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sidebar-card h3 i { color: var(--primary-light); font-size: 1rem; }

    .sidebar-list li {
        padding: 10px 0;
        border-bottom: 1px solid var(--border);
    }
    .sidebar-list li:last-child { border-bottom: none; }
    .sidebar-list a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        color: var(--text-light);
        font-size: 0.9rem;
        line-height: 1.4;
    }
    .sidebar-list a:hover { color: var(--text); }
    .sidebar-list a .thumb {
        width: 56px;
        height: 56px;
        border-radius: var(--radius-xs);
        background: var(--dark-2);
        flex-shrink: 0;
        overflow: hidden;
        border: 1px solid var(--border);
    }
    .sidebar-list a .thumb img { width: 100%; height: 100%; object-fit: cover; }
    .sidebar-list a .info .title { font-weight: 500; margin-bottom: 2px; }
    .sidebar-list a .info .date { font-size: 0.75rem; color: var(--text-muted); }

    .sidebar-cta {
        background: var(--primary-gradient);
        border: none;
        text-align: center;
        padding: 32px 24px;
    }
    .sidebar-cta h3 { color: white; justify-content: center; }
    .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.9rem; margin-bottom: 1.2rem; }
    .sidebar-cta .btn-cta {
        display: inline-block;
        padding: 12px 32px;
        border-radius: 50px;
        background: white;
        color: var(--primary-dark);
        font-weight: 700;
        font-size: 0.95rem;
        transition: var(--transition);
        border: none;
    }
    .sidebar-cta .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); color: var(--primary-dark); }

    /* 未找到文章 */
    .article-not-found {
        text-align: center;
        padding: 80px 20px;
    }
    .article-not-found .icon {
        font-size: 4rem;
        color: var(--text-muted);
        margin-bottom: 20px;
    }
    .article-not-found h2 { margin-bottom: 12px; }
    .article-not-found p { color: var(--text-muted); margin-bottom: 24px; }
    .article-not-found .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 50px;
        background: var(--primary-gradient);
        color: white;
        font-weight: 600;
        transition: var(--transition);
    }
    .article-not-found .btn-back:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,0.3); color: white; }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--dark-2);
        border-top: 1px solid var(--border);
        padding: 60px 0 30px;
        margin-top: 60px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    @media (max-width: 1024px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    }
    .footer-brand .logo { font-size: 1.3rem; margin-bottom: 16px; }
    .footer-brand p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; max-width: 420px; }
    .footer-col h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 18px;
        color: var(--text);
    }
    .footer-col a {
        display: block;
        padding: 6px 0;
        font-size: 0.9rem;
        color: var(--text-muted);
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--text); padding-left: 4px; }
    .footer-bottom {
        border-top: 1px solid var(--border);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: var(--text-muted);
    }
    @media (max-width: 600px) {
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    /* ===== 响应式微调 ===== */
    @media (max-width: 768px) {
        .article-banner { min-height: 240px; padding: 40px 0 28px; }
        .article-meta-bar { gap: 12px; font-size: 0.8rem; }
        .article-content-wrap { margin-top: 24px; gap: 24px; }
        .sidebar-card { padding: 18px 16px; }
    }
    @media (max-width: 520px) {
        .article-body { padding: 16px; }
        .article-nav-links { flex-direction: column; }
        .article-nav-links a { justify-content: center; }
        .sidebar-list a .thumb { width: 44px; height: 44px; }
    }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --secondary-dark: #e84393;
            --accent: #fdcb6e;
            --bg-dark: #0a0a1a;
            --bg-darker: #060612;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3a;
            --bg-section-alt: #0f0f25;
            --text-primary: #f0f0ff;
            --text-secondary: #b0b0d0;
            --text-muted: #7070a0;
            --border-color: #2a2a5a;
            --border-light: #3a3a6a;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.15);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.2);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

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

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

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

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

        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-title p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Header / Nav ===== */
        .site-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);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--primary-light);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.4);
        }

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

        .nav-main a {
            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-main a:hover {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.12);
        }

        .nav-main a.active {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.2);
        }

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

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 16px;
            height: 40px;
            min-width: 200px;
            transition: var(--transition);
            margin-left: 12px;
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
        }

        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0 8px;
            color: var(--text-primary);
            font-size: 0.9rem;
            height: 100%;
        }

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

        .nav-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 0 4px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .nav-search button:hover {
            color: var(--primary-light);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
        }

        /* ===== Mobile Nav ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(10, 10, 26, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 20px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 12px;
        }

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

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 1rem;
            transition: var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.15);
        }

        .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 16px;
            height: 44px;
            margin-top: 8px;
        }

        .mobile-search input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0 8px;
            color: var(--text-primary);
            font-size: 0.95rem;
            height: 100%;
        }

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

        .mobile-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            padding: calc(var(--header-height) + 60px) 0 80px;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-card) 50%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.15), transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .page-banner h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 24px;
        }

        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .banner-tags .tag {
            padding: 6px 18px;
            background: rgba(108, 92, 231, 0.2);
            border: 1px solid rgba(108, 92, 231, 0.3);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            transition: var(--transition);
        }

        .banner-tags .tag:hover {
            background: rgba(108, 92, 231, 0.35);
            transform: translateY(-2px);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

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

        .breadcrumb a:hover {
            color: var(--primary-light);
        }

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

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

        /* ===== Guide Intro ===== */
        .guide-intro {
            padding: 60px 0;
            background: var(--bg-section-alt);
        }

        .guide-intro .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .guide-intro .intro-text h2 {
            margin-bottom: 16px;
        }

        .guide-intro .intro-text p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            font-size: 1.02rem;
        }

        .guide-intro .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 24px;
        }

        .intro-stats .stat-item {
            text-align: center;
            padding: 16px 12px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        .intro-stats .stat-item .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary-light);
            display: block;
        }

        .intro-stats .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .guide-intro .intro-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .guide-intro .intro-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* ===== Guide Cards Grid ===== */
        .guide-list {
            padding: 80px 0;
            background: var(--bg-dark);
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .guide-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .guide-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .guide-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #fff;
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
        }

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

        .guide-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .guide-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 14px;
            flex: 1;
            line-height: 1.6;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }

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

        .card-meta .meta-right {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--accent);
        }

        .card-meta .meta-right i {
            font-size: 0.75rem;
        }

        .guide-card .card-body .btn-sm {
            align-self: flex-start;
            margin-top: 4px;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            transition: var(--transition);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .guide-card .card-body .btn-sm:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(108, 92, 231, 0.35);
        }

        /* ===== Sub Categories ===== */
        .sub-categories {
            padding: 70px 0;
            background: var(--bg-section-alt);
        }

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

        .sub-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }

        .sub-item:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .sub-item .icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.2), rgba(253, 121, 168, 0.2));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary-light);
            transition: var(--transition);
        }

        .sub-item:hover .icon {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
        }

        .sub-item h4 {
            font-size: 1rem;
            margin-bottom: 6px;
        }

        .sub-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Featured / Top Guides ===== */
        .featured-guides {
            padding: 80px 0;
            background: var(--bg-dark);
        }

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

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

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

        .featured-card .fc-img {
            width: 180px;
            min-height: 160px;
            flex-shrink: 0;
            overflow: hidden;
        }

        .featured-card .fc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .featured-card:hover .fc-img img {
            transform: scale(1.05);
        }

        .featured-card .fc-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .fc-body h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }

        .featured-card .fc-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .featured-card .fc-body .fc-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
        }

        .fc-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-section-alt);
        }

        .faq-list {
            max-width: 800px;
            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-light);
        }

        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            cursor: pointer;
            font-size: 1rem;
            color: var(--text-primary);
            transition: var(--transition);
            background: transparent;
            width: 100%;
            text-align: left;
            border: none;
        }

        .faq-question:hover {
            color: var(--primary-light);
        }

        .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--primary-light);
        }

        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-darker), var(--bg-card));
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.1), transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(253, 121, 168, 0.08), transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }

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

        .btn-primary,
        .btn-secondary {
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(108, 92, 231, 0.45);
            color: #fff;
        }

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

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

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

        .footer-brand .logo {
            margin-bottom: 14px;
            font-size: 1.2rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            padding: 5px 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

        @media (max-width: 820px) {
            .guide-intro .grid-2 {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .guide-intro .intro-image {
                order: -1;
            }

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

            .featured-card .fc-img {
                width: 140px;
                min-height: 140px;
            }
        }

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

            .nav-main a {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: calc(var(--header-height) + 40px) 0 50px;
                min-height: auto;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

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

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

            .intro-stats .stat-item .num {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --header-height: 62px;
            }

            .container {
                padding: 0 16px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }

            .page-banner p {
                font-size: 0.95rem;
            }

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

            .featured-card {
                flex-direction: column;
            }

            .featured-card .fc-img {
                width: 100%;
                height: 160px;
            }

            .section-title {
                margin-bottom: 32px;
            }

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

            .intro-stats .stat-item {
                padding: 12px 8px;
            }

            .intro-stats .stat-item .num {
                font-size: 1.1rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }

            .banner-tags .tag {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }