/* roulang page: index */
:root {
            --color-primary: #4f46e5;
            --color-primary-dark: #4338ca;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-bg-card: #ffffff;
            --color-text: #0f172a;
            --color-text-muted: #64748b;
            --color-border: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 0.5rem;
            color: var(--color-text);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin-bottom: 2.5rem;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #1e1b4b;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
            transform: translateY(-2px);
            color: #1e1b4b;
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-white {
            background: #fff;
            color: var(--color-primary);
            box-shadow: 0 4px 14px rgba(0,0,0,0.08);
        }
        .btn-white:hover {
            box-shadow: 0 8px 28px rgba(0,0,0,0.12);
            transform: translateY(-2px);
            color: var(--color-primary-dark);
        }
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--color-border);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            background: var(--color-primary);
            color: #fff;
        }
        .badge-accent {
            background: var(--color-accent);
            color: #1e1b4b;
        }
        .badge-soft {
            background: #eef2ff;
            color: var(--color-primary);
        }
        .tag {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            font-size: 0.7rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            background: #f1f5f9;
            color: var(--color-text-muted);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--color-primary);
            color: #fff;
        }
        .divider {
            width: 100%;
            height: 1px;
            background: var(--color-border);
            margin: 2rem 0;
        }
        .focus-ring:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        /* Nav */
        .navbar {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226,232,240,0.6);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-logo:hover {
            color: var(--color-primary-dark);
        }
        .nav-logo i {
            font-size: 1.5rem;
            color: var(--color-accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--color-primary);
            background: #f1f4ff;
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: #eef2ff;
            font-weight: 600;
        }
        .nav-links a.active i {
            color: var(--color-primary);
        }
        .nav-cta {
            margin-left: 0.75rem;
            padding: 0.5rem 1.25rem !important;
            background: var(--color-primary) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            box-shadow: 0 2px 8px rgba(79,70,229,0.2);
        }
        .nav-cta:hover {
            background: var(--color-primary-dark) !important;
            box-shadow: 0 4px 16px rgba(79,70,229,0.3) !important;
            transform: translateY(-1px);
            color: #fff !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 0.25rem;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        /* Mobile nav */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            z-index: 99;
            padding: 2rem 1.5rem;
            overflow-y: auto;
            flex-direction: column;
            gap: 0.5rem;
            border-top: 1px solid var(--color-border);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.9rem 1rem;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .mobile-menu a:hover {
            background: #f1f4ff;
            color: var(--color-primary);
        }
        .mobile-menu a.active {
            background: #eef2ff;
            color: var(--color-primary);
            font-weight: 700;
        }
        .mobile-menu .nav-cta-mobile {
            margin-top: 1rem;
            background: var(--color-primary);
            color: #fff;
            text-align: center;
            justify-content: center;
            font-weight: 700;
            padding: 1rem;
            border-radius: var(--radius-md);
        }
        .mobile-menu .nav-cta-mobile:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }
        /* Hero */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4f46e5 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--color-bg), transparent);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 4rem 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: 9999px;
            color: rgba(255,255,255,0.9);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #fcd34d, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-top: 0.25rem;
        }
        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .feature-card {
            padding: 2rem 1.5rem;
            text-align: center;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            font-size: 1.5rem;
            color: #fff;
        }
        .feature-icon.icon-blue { background: linear-gradient(135deg, #6366f1, #4f46e5); }
        .feature-icon.icon-amber { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
        .feature-icon.icon-emerald { background: linear-gradient(135deg, #34d399, #10b981); }
        .feature-icon.icon-rose { background: linear-gradient(135deg, #fb7185, #e11d48); }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--color-text);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        /* Login methods */
        .login-methods {
            background: #fff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .method-card {
            padding: 2.5rem 2rem;
            text-align: center;
            border-radius: var(--radius-lg);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            position: relative;
        }
        .method-card:hover {
            border-color: var(--color-primary);
            box-shadow: 0 8px 30px rgba(79,70,229,0.08);
            transform: translateY(-3px);
        }
        .method-card .popular {
            position: absolute;
            top: -0.75rem;
            right: 1rem;
            background: var(--color-accent);
            color: #1e1b4b;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.2rem 1rem;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .method-icon {
            font-size: 2.5rem;
            color: var(--color-primary);
            margin-bottom: 1rem;
        }
        .method-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .method-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        /* Process / Steps */
        .process-section {
            background: #fff;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(to right, var(--color-primary), var(--color-accent), var(--color-primary));
            opacity: 0.2;
        }
        .step-card {
            text-align: center;
            position: relative;
            z-index: 2;
            padding: 0 0.5rem;
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, #6366f1, #4f46e5);
            box-shadow: 0 8px 24px rgba(79,70,229,0.3);
            position: relative;
        }
        .step-card:nth-child(2) .step-number { background: linear-gradient(135deg, #fbbf24, #f59e0b); box-shadow: 0 8px 24px rgba(245,158,11,0.3); }
        .step-card:nth-child(3) .step-number { background: linear-gradient(135deg, #34d399, #10b981); box-shadow: 0 8px 24px rgba(16,185,129,0.3); }
        .step-card:nth-child(4) .step-number { background: linear-gradient(135deg, #fb7185, #e11d48); box-shadow: 0 8px 24px rgba(225,29,72,0.3); }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .step-card p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }
        /* News / CMS List */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .news-card .thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: #e2e8f0;
        }
        .news-card .body {
            padding: 1.5rem;
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 0.75rem;
        }
        .news-card .meta .cat {
            background: #eef2ff;
            color: var(--color-primary);
            padding: 0.15rem 0.6rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.7rem;
        }
        .news-card h3 {
            font-size: 1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 0.5rem;
            color: var(--color-text);
        }
        .news-card h3 a {
            color: var(--color-text);
        }
        .news-card h3 a:hover {
            color: var(--color-primary);
        }
        .news-card .excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--color-text-muted);
            font-size: 1rem;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-primary);
            box-shadow: 0 4px 16px rgba(79,70,229,0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }
        /* Stats */
        .stats-section {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
            padding: 4.5rem 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            position: relative;
            z-index: 2;
        }
        .stat-block {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-block .number {
            font-size: 2.75rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-block .number span {
            background: linear-gradient(135deg, #fcd34d, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-block .desc {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            font-weight: 500;
        }
        /* CTA */
        .cta-section {
            background: #fff;
            border-top: 1px solid var(--color-border);
        }
        .cta-box {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            border-radius: var(--radius-xl);
            padding: 4rem 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(79,70,229,0.25);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 2;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.8);
            max-width: 500px;
            margin: 0 auto 1.75rem;
            position: relative;
            z-index: 2;
        }
        .cta-box .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            position: relative;
            z-index: 2;
        }
        /* Footer */
        .footer {
            background: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 4rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand .logo i {
            color: var(--color-accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.25rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .footer ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .footer ul a {
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer ul a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 1.5rem 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a:hover {
            color: rgba(255,255,255,0.7);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .methods-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
            .hero h1 { font-size: 2.8rem; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-toggle { display: block; }
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 1.5rem; }
            .hero-stat-item .num { font-size: 1.6rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
            .feature-card { padding: 1.5rem 1rem; }
            .methods-grid { grid-template-columns: 1fr; gap: 1.25rem; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
            .news-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
            .stat-block .number { font-size: 2rem; }
            .cta-box { padding: 3rem 1.5rem; }
            .cta-box h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title { font-size: 1.6rem; }
            .section-padding { padding: 3rem 0; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .hero h1 { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
            .stat-block { padding: 1rem 0.5rem; }
            .stat-block .number { font-size: 1.6rem; }
            .hero-stat-item .num { font-size: 1.3rem; }
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.2rem; }
            .faq-question { padding: 1rem 1.25rem; font-size: 0.9rem; }
        }
        /* Skeleton */
        @keyframes shimmer {
            0% { background-position: -200px 0; }
            100% { background-position: calc(200px + 100%) 0; }
        }
        .skeleton {
            background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
            background-size: 200px 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }

/* roulang page: category1 */
:root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --bg-section: #f8fafc;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --radius: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', system-ui, -apple-system, sans-serif; background: #ffffff; color: var(--text-dark); line-height: 1.6; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        /* 导航 */
        .header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,0,0,0.06); box-shadow: 0 1px 8px rgba(0,0,0,0.04); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 700; color: var(--primary); letter-spacing: -0.3px; }
        .logo i { font-size: 1.6rem; color: var(--primary); }
        .nav-links { display: flex; align-items: center; gap: 8px; list-style: none; }
        .nav-links li a { display: flex; align-items: center; gap: 6px; padding: 10px 20px; border-radius: 40px; font-size: 0.95rem; font-weight: 500; color: var(--text-muted); transition: var(--transition); }
        .nav-links li a i { font-size: 0.9rem; }
        .nav-links li a:hover { color: var(--primary); background: rgba(26,86,219,0.08); }
        .nav-links li a.active { color: #fff; background: var(--primary); box-shadow: 0 4px 14px rgba(26,86,219,0.30); }
        .nav-links li a.nav-cta { background: var(--accent); color: #1e293b; font-weight: 600; box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
        .nav-links li a.nav-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.45); }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--text-dark); padding: 8px; }
        /* 横幅 Banner */
        .category-banner { position: relative; padding: 100px 0 80px; background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 60%, #1a56db 100%); overflow: hidden; }
        .category-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.15; mix-blend-mode: overlay; }
        .category-banner::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px; background: linear-gradient(to top, #ffffff, transparent); }
        .banner-content { position: relative; z-index: 2; text-align: center; }
        .banner-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.15); backdrop-filter: blur(12px); padding: 8px 22px; border-radius: 40px; color: #fff; font-size: 0.85rem; font-weight: 500; margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.20); }
        .banner-badge i { color: var(--accent); }
        .banner-content h1 { font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 16px; letter-spacing: -0.5px; }
        .banner-content h1 span { background: linear-gradient(135deg, var(--accent), #f97316); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .banner-content p { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 640px; margin: 0 auto 32px; line-height: 1.7; }
        .banner-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
        .banner-stat { text-align: center; color: #fff; }
        .banner-stat .num { font-size: 2.2rem; font-weight: 800; display: block; line-height: 1.2; }
        .banner-stat .label { font-size: 0.85rem; opacity: 0.7; }
        /* 板块通用 */
        .section { padding: 80px 0; }
        .section-title { font-size: 2.2rem; font-weight: 700; text-align: center; margin-bottom: 12px; letter-spacing: -0.3px; }
        .section-sub { text-align: center; color: var(--text-muted); max-width: 620px; margin: 0 auto 48px; font-size: 1.05rem; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        /* 卡片 */
        .card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); overflow: hidden; transition: var(--transition); }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .card-img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
        .card-body p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }
        .card-tag { display: inline-block; padding: 4px 14px; border-radius: 40px; font-size: 0.75rem; font-weight: 600; background: rgba(26,86,219,0.10); color: var(--primary); margin-bottom: 12px; }
        /* 步骤流程 */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-card { background: var(--bg-card); border-radius: var(--radius); padding: 32px 24px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); position: relative; transition: var(--transition); }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-card::before { counter-increment: step; content: counter(step); position: absolute; top: -14px; left: 50%; transform: translateX(-50%); width: 36px; height: 36px; background: var(--primary); color: #fff; font-weight: 700; font-size: 1rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(26,86,219,0.30); }
        .step-card .icon { font-size: 2.4rem; color: var(--primary); margin-bottom: 16px; margin-top: 8px; }
        .step-card h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); }
        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border-radius: 14px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); overflow: hidden; transition: var(--transition); }
        .faq-item summary { padding: 20px 24px; font-weight: 600; font-size: 1.05rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; list-style: none; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
        .faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
        .faq-item .faq-body { padding: 0 24px 20px; color: var(--text-muted); line-height: 1.7; }
        /* CTA */
        .cta-section { background: linear-gradient(135deg, #0f172a, #1a56db); padding: 80px 0; text-align: center; position: relative; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.10; mix-blend-mode: overlay; }
        .cta-content { position: relative; z-index: 2; }
        .cta-content h2 { font-size: 2.4rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
        .cta-btn { display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px; background: var(--accent); color: #1e293b; font-weight: 700; font-size: 1.05rem; border-radius: 50px; transition: var(--transition); box-shadow: 0 8px 28px rgba(245,158,11,0.40); }
        .cta-btn:hover { background: var(--accent-light); transform: translateY(-3px); box-shadow: 0 12px 36px rgba(245,158,11,0.55); }
        /* 页脚 */
        .footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 60px 0 0; }
        .footer-grid { 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; font-size: 1.3rem; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 24px 0; font-size: 0.85rem; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 12px; }
        .footer-bottom a { color: var(--accent); }
        .footer-bottom a:hover { text-decoration: underline; }
        /* 响应式 */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px; gap: 8px; border-bottom: 1px solid rgba(0,0,0,0.06); box-shadow: 0 8px 32px rgba(0,0,0,0.10); }
            .nav-links.open { display: flex; }
            .nav-links li a { width: 100%; justify-content: center; padding: 14px 20px; }
            .banner-content h1 { font-size: 2.2rem; }
            .banner-stats { gap: 24px; }
            .section-title { font-size: 1.8rem; }
            .grid-3, .grid-2 { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .banner-content h1 { font-size: 1.8rem; }
            .banner-stat .num { font-size: 1.6rem; }
            .section { padding: 48px 0; }
            .card-body { padding: 18px; }
            .cta-content h2 { font-size: 1.6rem; }
            .cta-btn { padding: 14px 28px; font-size: 0.95rem; }
        }

/* roulang page: article */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 10px 25px -5px rgba(0,0,0,0.06), 0 4px 10px -6px rgba(0,0,0,0.04);
    --shadow-hover: 0 20px 40px -8px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif; background: var(--bg-body); color: var(--text); line-height: 1.7; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; transition: var(--transition); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title { font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 12px; color: var(--text); letter-spacing: -0.02em; }
.section-sub { text-align: center; color: var(--text-muted); max-width: 640px; margin: 0 auto 48px; font-size: 1.05rem; }
.badge { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 600; background: var(--primary-light); color: #fff; letter-spacing: 0.3px; }
.badge-accent { background: var(--accent); color: #1e293b; }
/* header & nav */
.site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--primary); letter-spacing: -0.3px; }
.logo i { font-size: 1.6rem; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 8px; list-style: none; }
.nav-links li a { display: inline-flex; align-items: center; gap: 7px; padding: 8px 18px; border-radius: 50px; font-size: 0.95rem; font-weight: 500; color: var(--text); transition: var(--transition); }
.nav-links li a:hover { background: rgba(59,130,246,0.08); color: var(--primary-light); }
.nav-links li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(30,58,138,0.25); }
.nav-links li a.nav-cta { background: var(--accent); color: #1e293b; font-weight: 600; box-shadow: 0 4px 14px rgba(245,158,11,0.3); }
.nav-links li a.nav-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(245,158,11,0.4); }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 6px; }
@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .nav-links { display: none; flex-direction: column; background: #fff; position: absolute; top: 70px; left: 0; right: 0; border-bottom: 1px solid var(--border); padding: 16px 20px; gap: 6px; box-shadow: 0 20px 40px rgba(0,0,0,0.06); }
    .nav-links.open { display: flex; }
    .nav-links li a { padding: 12px 16px; border-radius: var(--radius-sm); width: 100%; }
    .header-inner { height: 64px; }
}
/* hero article */
.article-hero { position: relative; padding: 80px 0 60px; background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1e40af 100%); overflow: hidden; }
.article-hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
.article-hero .container { position: relative; z-index: 2; }
.article-hero .badge { margin-bottom: 16px; display: inline-block; }
.article-hero h1 { font-size: 2.6rem; font-weight: 800; color: #fff; line-height: 1.2; max-width: 860px; letter-spacing: -0.02em; margin-bottom: 18px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px 28px; color: rgba(255,255,255,0.75); font-size: 0.95rem; }
.article-meta i { margin-right: 6px; color: var(--accent); }
/* article body */
.article-body { padding: 48px 0 64px; }
.article-content { max-width: 800px; margin: 0 auto; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 48px 56px; }
.article-content .post-body { font-size: 1.05rem; line-height: 1.85; color: #1e293b; }
.article-content .post-body h2 { font-size: 1.6rem; font-weight: 700; margin: 32px 0 16px; color: var(--primary); }
.article-content .post-body h3 { font-size: 1.25rem; font-weight: 600; margin: 24px 0 12px; }
.article-content .post-body p { margin-bottom: 18px; }
.article-content .post-body ul, .article-content .post-body ol { margin: 0 0 18px 1.5em; }
.article-content .post-body li { margin-bottom: 8px; }
.article-content .post-body a { color: var(--primary-light); text-decoration: underline; }
.article-content .post-body a:hover { color: var(--primary); }
.article-content .post-body img { border-radius: var(--radius-sm); margin: 24px 0; }
.article-content .post-body blockquote { border-left: 4px solid var(--accent); background: #fffbeb; padding: 16px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: #92400e; }
.article-footer-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-footer-meta .tag { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; background: #eef2ff; color: var(--primary); font-weight: 500; }
.share-bar { display: flex; gap: 12px; align-items: center; margin-top: 24px; }
.share-bar span { font-weight: 600; color: var(--text-muted); font-size: 0.9rem; }
.share-bar a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: #f1f5f9; color: var(--text-muted); font-size: 1.1rem; transition: var(--transition); }
.share-bar a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
/* related */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 24px; }
.related-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.related-card .card-img { height: 180px; background: #e2e8f0; position: relative; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 20px 22px; }
.related-card .card-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-body p { font-size: 0.92rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 0.82rem; color: var(--text-muted); }
.related-card .card-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
/* faq */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border-radius: var(--radius-sm); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; font-weight: 600; font-size: 1.02rem; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary-light); transition: var(--transition); font-size: 0.9rem; }
.faq-item[open] summary i { transform: rotate(180deg); color: var(--accent); }
.faq-item .faq-answer { padding: 0 22px 18px; color: var(--text-muted); line-height: 1.7; }
/* cta */
.cta-section { background: linear-gradient(135deg, #1e3a8a, #3b82f6); padding: 72px 0; text-align: center; color: #fff; }
.cta-section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 14px; }
.cta-section p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto 28px; }
.cta-btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px; border-radius: 50px; background: var(--accent); color: #1e293b; font-weight: 700; font-size: 1.1rem; box-shadow: 0 8px 24px rgba(245,158,11,0.4); transition: var(--transition); }
.cta-btn:hover { background: var(--accent-light); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(245,158,11,0.5); color: #1e293b; }
/* footer */
.footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 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: 14px; }
.footer-brand .logo i { color: var(--accent); }
.footer-brand p { font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
.footer h4 { color: #fff; font-weight: 600; margin-bottom: 16px; font-size: 1rem; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 0.92rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: 24px 0; font-size: 0.85rem; color: rgba(255,255,255,0.4); gap: 12px; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .article-hero h1 { font-size: 1.8rem; }
    .article-content { padding: 24px 20px; }
    .section-title { font-size: 1.6rem; }
    .section { padding: 48px 0; }
    .related-grid { grid-template-columns: 1fr; }
    .cta-section h2 { font-size: 1.6rem; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
    .article-hero { padding: 48px 0 36px; }
    .article-hero h1 { font-size: 1.4rem; }
    .article-meta { font-size: 0.82rem; gap: 10px; }
    .article-content { padding: 16px 14px; border-radius: var(--radius-sm); }
    .share-bar { flex-wrap: wrap; }
}
/* not found */
.not-found-box { text-align: center; padding: 60px 20px; }
.not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
.not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
.not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
.not-found-box .back-home { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; background: var(--primary); color: #fff; font-weight: 600; }
.not-found-box .back-home:hover { background: var(--primary-light); transform: translateY(-2px); }