/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --accent-dark: #059669;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 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-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        .container-sm {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .section-padding {
            padding: 80px 0;
        }

        .section-padding-sm {
            padding: 60px 0;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }

        .text-center {
            text-align: center;
        }

        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .gap-4 {
            gap: 16px;
        }
        .gap-6 {
            gap: 24px;
        }
        .gap-8 {
            gap: 32px;
        }

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

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

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            text-align: center;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }

        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-secondary:hover {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-white:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
        }

        .btn-lg {
            padding: 18px 40px;
            font-size: 1.125rem;
            border-radius: var(--radius);
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 0.875rem;
        }

        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 100px;
            font-size: 0.8125rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .badge-secondary {
            background: var(--secondary-light);
            color: var(--secondary-dark);
        }

        .badge-accent {
            background: #d1fae5;
            color: #065f46;
        }

        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 28px;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .card-img {
            border-radius: var(--radius) var(--radius) 0 0;
            overflow: hidden;
            margin: -28px -28px 20px -28px;
            height: 200px;
            background: var(--bg-alt);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }

        .card-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-text {
            font-size: 0.9375rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8125rem;
            color: var(--text-light);
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.375rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--text);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text);
            font-size: 0.9375rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-main a.active {
            color: var(--primary-dark);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 100px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-light);
        }
        .search-box input {
            background: transparent;
            padding: 10px 8px 10px 0;
            min-width: 160px;
            font-size: 0.875rem;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.875rem;
        }

        .btn-login {
            padding: 10px 20px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.875rem;
            color: var(--text);
            background: transparent;
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-login:hover {
            background: var(--bg-alt);
            border-color: var(--text-light);
        }

        .btn-start {
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.875rem;
            color: #fff;
            background: var(--primary);
            border: none;
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-start:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a2a4a 100%);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 80px 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            padding: 8px 18px;
            border-radius: 100px;
            color: var(--text-white);
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-badge i {
            color: var(--secondary);
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.1;
            color: #fff;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--secondary), #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 36px;
        }

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

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
        }
        .hero-stat-label {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Features Section ===== */
        .features-section {
            background: var(--bg);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 48px;
        }

        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: var(--primary-light);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.75rem;
            color: #fff;
        }
        .feature-icon.blue {
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
        }
        .feature-icon.gold {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #059669);
        }
        .feature-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }

        .feature-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .feature-desc {
            font-size: 0.9375rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Category Intro ===== */
        .category-section {
            background: var(--bg-alt);
        }

        .category-card {
            display: flex;
            align-items: center;
            gap: 48px;
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 48px 56px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .category-info {
            flex: 1;
        }

        .category-info .badge {
            margin-bottom: 16px;
        }

        .category-info h3 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .category-info p {
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .category-image {
            flex-shrink: 0;
            width: 320px;
            height: 220px;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-alt);
        }
        .category-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== Latest Posts ===== */
        .posts-section {
            background: var(--bg);
        }

        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 48px;
        }

        .post-card {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .post-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .post-card-img {
            height: 200px;
            background: var(--bg-alt);
            overflow: hidden;
        }
        .post-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .post-card:hover .post-card-img img {
            transform: scale(1.05);
        }

        .post-card-body {
            padding: 24px;
        }

        .post-card-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 100px;
            margin-bottom: 12px;
        }

        .post-card-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-title a {
            color: var(--text);
        }
        .post-card-title a:hover {
            color: var(--primary);
        }

        .post-card-excerpt {
            font-size: 0.875rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .post-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8125rem;
            color: var(--text-light);
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            background: var(--bg-alt);
            border-radius: var(--radius);
            font-size: 1.0625rem;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: var(--bg-dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }

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

        .stat-item {
            text-align: center;
            padding: 40px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        .stat-icon {
            font-size: 2rem;
            color: rgba(255, 255, 255, 0.2);
            margin-bottom: 16px;
        }

        /* ===== Guide Preview ===== */
        .guide-section {
            background: var(--bg-alt);
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 48px;
        }

        .guide-card {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 24px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .guide-card .badge {
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .guide-card h4 {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .guide-card p {
            font-size: 0.875rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }

        .guide-card .btn {
            align-self: flex-start;
        }

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

        .faq-list {
            max-width: 800px;
            margin: 48px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.0625rem;
            color: var(--text);
            cursor: pointer;
            background: var(--bg);
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            color: var(--text-light);
            transition: transform var(--transition);
            font-size: 1rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.7;
            font-size: 0.9375rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), #1e3a5f);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 0;
        }

        .cta-title {
            font-size: 2.5rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .cta-desc {
            font-size: 1.125rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }

        .footer-desc {
            font-size: 0.9375rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 0.9375rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 2.75rem;
            }
            .category-card {
                flex-direction: column;
                padding: 32px;
            }
            .category-image {
                width: 100%;
                height: 200px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .hero-title {
                font-size: 2.25rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }

            .nav-main {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: var(--primary-light);
            }

            .mobile-toggle {
                display: block;
            }

            .header-actions .search-box,
            .header-actions .btn-login {
                display: none;
            }
            .header-actions .btn-start {
                padding: 8px 18px;
                font-size: 0.8125rem;
            }

            .grid-2,
            .grid-3,
            .grid-4,
            .posts-grid,
            .guide-grid {
                grid-template-columns: 1fr;
            }

            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 16px;
            }
            .feature-icon {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 16px;
            }
            .stat-number {
                font-size: 1.75rem;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }

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

            .category-card {
                padding: 24px;
            }
            .category-image {
                height: 180px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.75rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .hero-stat-number {
                font-size: 1.25rem;
            }
            .post-card-img {
                height: 160px;
            }
            .faq-question {
                font-size: 0.9375rem;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 0.875rem;
            }
        }

        /* ===== Animation ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-in-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-in-delay-3 {
            animation-delay: 0.3s;
        }
        .fade-in-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #6c3ef5;
            --color-primary-dark: #5328d6;
            --color-primary-light: #8f6aff;
            --color-accent: #ff6b35;
            --color-accent-light: #ff8f5e;
            --color-bg: #0d0d1a;
            --color-bg-alt: #14142a;
            --color-bg-card: #1c1c3a;
            --color-bg-card-hover: #24244e;
            --color-text: #f0f0f5;
            --color-text-muted: #9898b8;
            --color-text-dim: #6a6a8a;
            --color-border: #2a2a4e;
            --color-border-light: #3a3a5e;
            --color-success: #22c55e;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(108, 62, 245, 0.2);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(16px) saturate(1.4);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(13, 13, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo i {
            font-size: 26px;
            color: var(--color-primary-light);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }
        .nav-main a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-main a.active {
            color: #fff;
            background: rgba(108, 62, 245, 0.2);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--color-primary-light);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-actions .search-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-bg-card);
            color: var(--color-text-muted);
            font-size: 16px;
            transition: background var(--transition), color var(--transition);
        }
        .header-actions .search-btn:hover {
            background: var(--color-bg-card-hover);
            color: #fff;
        }
        .header-actions .btn-cta {
            padding: 10px 24px;
            border-radius: var(--radius-xl);
            font-size: 14px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .header-actions .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 107, 53, 0.4);
        }

        /* 移动端菜单切换 */
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-card);
            color: var(--color-text);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--color-bg-card-hover);
        }

        /* 移动端导航 */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(13, 13, 26, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 6px;
            z-index: 999;
            transform: translateY(-16px);
            opacity: 0;
            pointer-events: none;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: background var(--transition), color var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: rgba(108, 62, 245, 0.15);
            color: #fff;
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .mobile-nav {
                display: flex;
            }
            .header-actions .btn-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
            .header-inner {
                padding: 0 16px;
            }
        }

        /* ===== Banner / Hero 内页 ===== */
        .page-banner {
            margin-top: var(--header-height);
            padding: 80px 0 72px;
            background: linear-gradient(135deg, rgba(108, 62, 245, 0.12), rgba(255, 107, 53, 0.08)), url(/assets/images/backpic/back-2.png) center center / cover no-repeat;
            position: relative;
            isolation: isolate;
            border-bottom: 1px solid var(--color-border);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(13, 13, 26, 0.65);
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fff 50%, var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 18px;
            color: var(--color-text-muted);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .banner-meta {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            font-size: 15px;
            color: var(--color-text-dim);
        }
        .page-banner .banner-meta i {
            margin-right: 6px;
            color: var(--color-primary-light);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 56px 0 48px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner p {
                font-size: 16px;
            }
            .page-banner .banner-meta {
                gap: 16px;
                font-size: 13px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .badge-group {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: var(--radius-xl);
            font-size: 13px;
            font-weight: 600;
            background: rgba(108, 62, 245, 0.15);
            color: var(--color-primary-light);
            border: 1px solid rgba(108, 62, 245, 0.25);
        }
        .badge-accent {
            background: rgba(255, 107, 53, 0.15);
            color: var(--color-accent);
            border-color: rgba(255, 107, 53, 0.25);
        }
        .badge-success {
            background: rgba(34, 197, 94, 0.15);
            color: var(--color-success);
            border-color: rgba(34, 197, 94, 0.25);
        }
        .badge i {
            font-size: 12px;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 680px) {
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            border-color: var(--color-border-light);
        }
        .card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-xl);
            font-size: 12px;
            font-weight: 600;
            background: rgba(108, 62, 245, 0.85);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .card-img .card-tag.accent {
            background: rgba(255, 107, 53, 0.85);
        }
        .card-body {
            padding: 24px 20px 20px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .card-body h3 a {
            color: #fff;
            transition: color var(--transition);
        }
        .card-body h3 a:hover {
            color: var(--color-primary-light);
        }
        .card-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-dim);
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .card-meta i {
            margin-right: 4px;
            color: var(--color-primary-light);
        }
        .card-meta .stars {
            color: var(--color-warning);
        }

        @media (max-width: 680px) {
            .card-body {
                padding: 18px 16px 16px;
            }
            .card-body h3 {
                font-size: 17px;
            }
        }

        /* ===== 特色内容区块（图文交错） ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-block.reverse {
            direction: rtl;
        }
        .feature-block.reverse>* {
            direction: ltr;
        }
        .feature-block .feature-text h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.2px;
        }
        .feature-block .feature-text p {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .feature-block .feature-text .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-block .feature-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-text);
        }
        .feature-block .feature-text .feature-list li i {
            margin-top: 3px;
            color: var(--color-success);
            font-size: 18px;
            flex-shrink: 0;
        }
        .feature-block .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--color-bg-card);
            aspect-ratio: 4 / 3;
        }
        .feature-block .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        @media (max-width: 900px) {
            .feature-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-block.reverse {
                direction: ltr;
            }
            .feature-block .feature-text h3 {
                font-size: 24px;
            }
            .feature-block .feature-img {
                aspect-ratio: 16 / 9;
            }
        }

        /* ===== 数据 / 统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 32px 16px;
            border: 1px solid var(--color-border);
            transition: transform var(--transition), border-color var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }
        .stat-item .number {
            font-size: 38px;
            font-weight: 800;
            background: linear-gradient(135deg, #fff 30%, var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 15px;
            color: var(--color-text-muted);
            margin-top: 6px;
        }
        .stat-item i {
            font-size: 28px;
            color: var(--color-primary-light);
            margin-bottom: 12px;
        }

        @media (max-width: 900px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 30px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item {
                padding: 24px 12px;
            }
        }

        /* ===== 流程 / 步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 36px 24px 28px;
            border: 1px solid var(--color-border);
            position: relative;
            transition: transform var(--transition), border-color var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }
        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 48px;
            font-weight: 900;
            color: rgba(108, 62, 245, 0.08);
            line-height: 1;
            pointer-events: none;
        }
        .step-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(108, 62, 245, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--color-primary-light);
            margin-bottom: 20px;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        @media (max-width: 600px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            gap: 16px;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-q i {
            font-size: 18px;
            color: var(--color-primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }

        @media (max-width: 680px) {
            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-a {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(108, 62, 245, 0.12), rgba(255, 107, 53, 0.08)), url(/assets/images/backpic/back-3.png) center center / cover no-repeat;
            position: relative;
            isolation: isolate;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(13, 13, 26, 0.7);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--color-text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            padding: 14px 40px;
            border-radius: var(--radius-xl);
            font-size: 16px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            color: #fff;
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.35);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(255, 107, 53, 0.45);
        }
        .cta-section .btn-outline {
            padding: 14px 40px;
            border-radius: var(--radius-xl);
            font-size: 16px;
            font-weight: 600;
            border: 2px solid var(--color-primary-light);
            color: var(--color-primary-light);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .cta-section .btn-outline:hover {
            background: var(--color-primary-light);
            color: #fff;
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .cta-section .btn-primary,
            .cta-section .btn-outline {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg-alt);
            border-top: 1px solid var(--color-border);
            padding: 56px 0 28px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 14px;
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--color-bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-muted);
            font-size: 16px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--color-text-muted);
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-primary-light);
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-dim);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-primary-light);
        }

        @media (max-width: 900px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .pagination a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 0 12px;
            transition: background var(--transition), border-color var(--transition), color var(--transition);
        }
        .pagination a:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-primary);
            color: #fff;
        }
        .pagination a.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
        }

        /* ===== 分类页特有筛选条 ===== */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
            background: var(--color-bg-card);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            border: 1px solid var(--color-border);
        }
        .filter-bar .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-bar .filter-tags a {
            padding: 6px 16px;
            border-radius: var(--radius-xl);
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.04);
            color: var(--color-text-muted);
            border: 1px solid transparent;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .filter-bar .filter-tags a:hover,
        .filter-bar .filter-tags a.active {
            background: rgba(108, 62, 245, 0.15);
            color: var(--color-primary-light);
            border-color: rgba(108, 62, 245, 0.25);
        }
        .filter-bar .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-dim);
        }
        .filter-bar .filter-sort select {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 6px 28px 6px 12px;
            font-size: 13px;
            color: var(--color-text);
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239898b8' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
            cursor: pointer;
        }

        @media (max-width: 680px) {
            .filter-bar {
                flex-direction: column;
                align-items: stretch;
            }
            .filter-bar .filter-sort {
                justify-content: flex-end;
            }
        }

        /* ===== 加载骨架 ===== */
        @keyframes shimmer {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }
        .skeleton {
            background: linear-gradient(90deg, var(--color-bg-card) 25%, var(--color-bg-card-hover) 50%, var(--color-bg-card) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }

        /* ===== 淡入动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ============================================
               :root 设计变量
            ============================================ */
        :root {
            --color-primary: #6c5ce7;
            --color-primary-dark: #5a4bd1;
            --color-primary-light: #a29bfe;
            --color-secondary: #fd79a8;
            --color-secondary-dark: #e84393;
            --color-accent: #fdcb6e;
            --color-bg: #f8f9fc;
            --color-bg-alt: #ffffff;
            --color-bg-card: #ffffff;
            --color-bg-dark: #1e1e2f;
            --color-bg-hero: #0f0e1a;
            --color-text: #1a1a2e;
            --color-text-light: #6b7280;
            --color-text-white: #ffffff;
            --color-border: #e5e7eb;
            --color-border-light: #f0f0f5;
            --color-success: #00b894;
            --color-warning: #fdcb6e;
            --color-error: #e17055;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'Courier New', monospace;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 50%;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 32px 64px rgba(0, 0, 0, 0.16);
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ============================================
               Reset & Base
            ============================================ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        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(--color-text);
        }
        h1 {
            font-size: clamp(1.8rem, 4.5vw, 3rem);
        }
        h2 {
            font-size: clamp(1.4rem, 3vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--color-text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .section-title h2 {
            margin-bottom: var(--spacing-sm);
        }
        .section-title p {
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .text-center {
            text-align: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ============================================
               Header / Nav
            ============================================ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-text);
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--color-primary);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
        }
        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            position: relative;
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            transition: width var(--transition);
        }
        .nav-main a:hover {
            color: var(--color-primary);
        }
        .nav-main a:hover::after {
            width: 60%;
        }
        .nav-main a.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-main a.active::after {
            width: 70%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }
        .nav-actions .search-toggle {
            font-size: 1.2rem;
            color: var(--color-text-light);
            padding: var(--spacing-xs);
            border-radius: var(--radius-full);
            transition: background var(--transition), color var(--transition);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-actions .search-toggle:hover {
            background: var(--color-border-light);
            color: var(--color-primary);
        }
        .btn-nav {
            padding: 8px 20px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
        }
        .btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn-nav-outline {
            background: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
            box-shadow: none;
        }
        .btn-nav-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: none;
            transform: translateY(-1px);
        }
        .mobile-menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: var(--spacing-xs);
            background: none;
            border: none;
            cursor: pointer;
        }

        /* ============================================
               Hero Banner (Article)
            ============================================ */
        .article-hero {
            padding-top: calc(var(--header-height) + var(--spacing-2xl));
            padding-bottom: var(--spacing-3xl);
            background: linear-gradient(135deg, #0f0e1a 0%, #1a1a2e 50%, #16213e 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--color-bg), transparent);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .article-hero .breadcrumb a:hover {
            color: #fff;
        }
        .article-hero .breadcrumb i {
            font-size: 0.6rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .article-hero h1 {
            color: #fff;
            font-size: clamp(1.6rem, 4vw, 2.8rem);
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
            line-height: 1.35;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            font-size: 0.85rem;
            color: var(--color-primary-light);
        }
        .article-hero .meta .category-badge {
            display: inline-block;
            background: rgba(108, 92, 231, 0.3);
            color: var(--color-primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 0.8rem;
            border: 1px solid rgba(108, 92, 231, 0.3);
            backdrop-filter: blur(4px);
        }

        /* ============================================
               Article Content
            ============================================ */
        .article-content-wrap {
            padding: var(--spacing-2xl) 0 var(--spacing-3xl);
            background: var(--color-bg);
        }
        .article-content-wrap .container-narrow {
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-2xl) var(--spacing-xl);
        }
        .article-featured-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: var(--spacing-xl);
            box-shadow: var(--shadow-md);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-body p {
            margin-bottom: 1.2rem;
            color: var(--color-text);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2rem;
            padding-left: 1.4rem;
            list-style: disc;
        }
        .article-body ol {
            list-style: decimal;
        }
        .article-body li {
            margin-bottom: 0.4rem;
            color: var(--color-text);
        }
        .article-body blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-bg);
            padding: var(--spacing-md) var(--spacing-lg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--color-text-light);
        }
        .article-body code {
            font-family: var(--font-mono);
            background: var(--color-bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body pre {
            background: var(--color-bg-dark);
            color: #e4e4e7;
            padding: var(--spacing-lg);
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--color-primary-dark);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--color-border-light);
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--color-bg);
            color: var(--color-text-light);
            padding: 6px 16px;
            border-radius: var(--radius-lg);
            font-size: 0.8rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            border: 1px solid var(--color-border);
        }
        .article-tags .tag:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border-light);
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--color-text-light);
            font-weight: 500;
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-full);
            background: var(--color-bg);
            color: var(--color-text-light);
            border: 1px solid var(--color-border);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .article-share a:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        /* ============================================
               Related Articles
            ============================================ */
        .related-section {
            background: var(--color-bg-alt);
            padding: var(--spacing-3xl) 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .related-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--color-border-light);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--color-bg);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a {
            color: var(--color-text);
        }
        .related-card .card-body h3 a:hover {
            color: var(--color-primary);
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--color-text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }
        .related-card .card-body .meta-sm {
            font-size: 0.75rem;
            color: var(--color-text-light);
            margin-top: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }

        /* ============================================
               FAQ
            ============================================ */
        .faq-section {
            background: var(--color-bg);
            padding: var(--spacing-3xl) 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .faq-item {
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg) var(--spacing-xl);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            gap: var(--spacing-md);
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--color-primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 var(--spacing-xl);
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer p {
            margin-bottom: 0.8rem;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 var(--spacing-xl) var(--spacing-lg);
        }

        /* ============================================
               CTA
            ============================================ */
        .cta-section {
            padding: var(--spacing-3xl) 0;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            color: #fff;
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
            margin-bottom: var(--spacing-md);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto var(--spacing-xl);
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn-cta-primary {
            padding: 14px 36px;
            border-radius: var(--radius-lg);
            font-weight: 700;
            font-size: 1rem;
            background: #fff;
            color: var(--color-primary-dark);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
            color: var(--color-primary-dark);
        }
        .btn-cta-secondary {
            padding: 14px 36px;
            border-radius: var(--radius-lg);
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
            color: #fff;
        }

        /* ============================================
               Footer
            ============================================ */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacing-3xl) 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: var(--spacing-md);
        }
        .footer-brand .logo i {
            font-size: 1.5rem;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: var(--spacing-lg);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-social {
            display: flex;
            gap: var(--spacing-sm);
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            padding: var(--spacing-lg) 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ============================================
               Not Found State
            ============================================ */
        .not-found-box {
            text-align: center;
            padding: var(--spacing-3xl) var(--spacing-xl);
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i {
            font-size: 3.5rem;
            color: var(--color-primary-light);
            margin-bottom: var(--spacing-lg);
        }
        .not-found-box h2 {
            margin-bottom: var(--spacing-md);
        }
        .not-found-box p {
            color: var(--color-text-light);
            margin-bottom: var(--spacing-lg);
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 12px 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-lg);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ============================================
               Responsive
            ============================================ */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                gap: 0;
                padding: var(--spacing-md) var(--spacing-lg);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--color-border);
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-main a {
                padding: var(--spacing-md) 0;
                font-size: 1rem;
                border-bottom: 1px solid var(--color-border-light);
                width: 100%;
                text-align: center;
            }
            .nav-main a::after {
                display: none;
            }
            .nav-main a.active {
                color: var(--color-primary);
                background: rgba(108, 92, 231, 0.06);
                border-radius: var(--radius-sm);
            }
            .nav-actions .btn-nav {
                display: none;
            }
            .nav-actions .btn-nav-outline {
                display: none;
            }
            .nav-actions .search-toggle {
                display: flex;
            }
            .header-inner {
                padding: 0 var(--spacing-md);
            }
            .article-hero {
                min-height: 280px;
                padding-top: calc(var(--header-height) + var(--spacing-lg));
                padding-bottom: var(--spacing-2xl);
            }
            .article-hero .meta {
                gap: var(--spacing-md);
                font-size: 0.82rem;
            }
            .article-content-wrap .container-narrow {
                padding: var(--spacing-lg) var(--spacing-md);
                border-radius: var(--radius-md);
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .faq-question {
                padding: var(--spacing-md) var(--spacing-lg);
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 var(--spacing-lg);
            }
            .faq-item.active .faq-answer {
                padding: 0 var(--spacing-lg) var(--spacing-md);
            }
            .cta-section {
                padding: var(--spacing-2xl) 0;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                max-width: 320px;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .meta {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .article-body {
                font-size: 0.95rem;
            }
            .article-tags .tag {
                font-size: 0.7rem;
                padding: 4px 12px;
            }
            .logo {
                font-size: 1.2rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
            .related-card .card-img {
                height: 150px;
            }
            .section-title h2 {
                font-size: 1.3rem;
            }
        }

        /* ============================================
               Fade In Animation
            ============================================ */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .fade-up-d1 {
            animation-delay: 0.1s;
        }
        .fade-up-d2 {
            animation-delay: 0.2s;
        }
        .fade-up-d3 {
            animation-delay: 0.3s;
        }
        .fade-up-d4 {
            animation-delay: 0.4s;
        }