/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #2d2d4a;
            --secondary: #e94560;
            --secondary-hover: #d63850;
            --accent: #ff6b35;
            --accent-hover: #e55a2b;
            --dark: #0f0e17;
            --dark-alt: #1a1a2e;
            --light: #f8f9fc;
            --light-alt: #eef0f5;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e8;
            --border-light: #f0f0f5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-brand-height: 64px;
            --header-nav-height: 48px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--light);
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary-hover); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text); }
        h1 { font-size: 3rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.25rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        @media (max-width: 768px) { 
            h1 { font-size: 2rem; }
            h2 { font-size: 1.65rem; }
            h3 { font-size: 1.25rem; }
        }
        .section-title { margin-bottom: 12px; }
        .section-subtitle { color: var(--text-light); font-size: 1.1rem; max-width: 640px; margin-bottom: 40px; }
        .text-center .section-subtitle { margin-left: auto; margin-right: auto; }

        /* ===== Header / Brand Row ===== */
        .site-header {
            background: var(--dark);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-brand-height);
            padding: 0 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
        }
        .site-logo:hover { color: var(--text-white); opacity: 0.9; }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-actions .search-toggle,
        .header-actions .menu-toggle {
            color: rgba(255,255,255,0.7);
            font-size: 1.2rem;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .header-actions .search-toggle:hover,
        .header-actions .menu-toggle:hover {
            color: #fff;
            background: rgba(255,255,255,0.08);
        }
        .header-actions .btn-cta-small {
            background: var(--secondary);
            color: #fff;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .header-actions .btn-cta-small:hover { background: var(--secondary-hover); color: #fff; transform: translateY(-1px); }
        .menu-toggle { display: none; }
        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .header-actions .btn-cta-small { display: none; }
        }

        /* ===== Navigation / Channel Row ===== */
        .nav-channel-row {
            background: rgba(255,255,255,0.03);
            border-top: 1px solid rgba(255,255,255,0.05);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            height: var(--header-nav-height);
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-channel-row::-webkit-scrollbar { display: none; }
        .nav-channel-list {
            display: flex;
            gap: 4px;
            align-items: center;
            height: 100%;
        }
        .nav-channel-list a {
            display: flex;
            align-items: center;
            height: 100%;
            padding: 0 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.65);
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .nav-channel-list a:hover {
            color: #fff;
            border-bottom-color: var(--secondary);
            background: rgba(255,255,255,0.04);
        }
        .nav-channel-list a.active {
            color: #fff;
            border-bottom-color: var(--secondary);
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .nav-channel-row { padding: 0 12px; }
            .nav-channel-list a { padding: 0 14px; font-size: 0.82rem; }
        }

        /* ===== Mobile Menu Panel ===== */
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: var(--header-brand-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--dark);
            z-index: 999;
            padding: 32px 24px;
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
        }
        .mobile-menu-panel.open { transform: translateX(0); }
        .mobile-menu-panel.show { display: block; }
        .mobile-menu-panel a {
            display: block;
            padding: 14px 0;
            font-size: 1.1rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-menu-panel a:hover { color: #fff; }
        .mobile-menu-panel a.active { color: var(--secondary); }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.5;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg { transform: scale(1); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,14,23,0.85) 0%, rgba(26,26,46,0.7) 50%, rgba(15,14,23,0.85) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 60px 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(233,69,96,0.2);
            border: 1px solid rgba(233,69,96,0.3);
            color: var(--secondary);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
        }
        .hero h1 {
            color: var(--text-white);
            font-size: 3.5rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--secondary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            color: rgba(255,255,255,0.7);
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #fff;
            padding: 14px 40px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(233,69,96,0.3);
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(233,69,96,0.4);
            color: #fff;
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.25);
            padding: 12px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            border-color: var(--text-white);
            background: rgba(255,255,255,0.08);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 28px; }
            .hero-stat .num { font-size: 1.5rem; }
        }

        /* ===== Section Spacing ===== */
        .section-padding { padding: 80px 0; }
        @media (max-width: 768px) { .section-padding { padding: 48px 0; } }
        .section-dark { background: var(--dark); color: var(--text-white); }
        .section-dark .section-title { color: var(--text-white); }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }
        .section-light-alt { background: var(--light-alt); }

        /* ===== Features / Core ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: #fff;
            padding: 36px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: #fff;
        }
        .feature-card .icon.icon-1 { background: linear-gradient(135deg, #e94560, #ff6b35); }
        .feature-card .icon.icon-2 { background: linear-gradient(135deg, #45a29e, #66fcf1); }
        .feature-card .icon.icon-3 { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
        @media (max-width: 992px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 576px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Categories ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .category-card .cat-img {
            height: 200px;
            background: var(--dark-alt);
            overflow: hidden;
        }
        .category-card .cat-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .cat-img img { transform: scale(1.05); }
        .category-card .cat-body {
            padding: 24px;
        }
        .category-card .cat-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .category-card .cat-body p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 16px; }
        .category-card .cat-tag {
            display: inline-block;
            background: var(--light-alt);
            color: var(--text-light);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        @media (max-width: 768px) { .categories-grid { grid-template-columns: 1fr; } }

        /* ===== CMS Posts List ===== */
        .posts-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .post-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .post-card .post-img {
            height: 180px;
            overflow: hidden;
            background: var(--light-alt);
        }
        .post-card .post-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .post-card:hover .post-img img { transform: scale(1.05); }
        .post-card .post-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .post-card .post-meta .cat-badge {
            background: var(--light-alt);
            padding: 2px 12px;
            border-radius: 12px;
            font-weight: 500;
            color: var(--text-light);
        }
        .post-card .post-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card .post-body h3 a { color: var(--text); }
        .post-card .post-body h3 a:hover { color: var(--secondary); }
        .post-card .post-body p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .post-card .post-foot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }
        .post-card .post-foot a { color: var(--secondary); font-weight: 500; }
        .post-card .post-foot a:hover { color: var(--secondary-hover); }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        @media (max-width: 768px) { .posts-list { grid-template-columns: 1fr; } }

        /* ===== Stats / Data Block ===== */
        .stats-block {
            background: var(--dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .stats-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15,14,23,0.85);
        }
        .stats-block .container { position: relative; z-index: 2; }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-item .stat-num .suffix { font-size: 1.6rem; color: var(--secondary); }
        .stat-item .stat-label {
            color: rgba(255,255,255,0.6);
            font-size: 0.95rem;
            margin-top: 8px;
        }
        @media (max-width: 992px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
        @media (max-width: 576px) { .stats-grid { grid-template-columns: 1fr; } .stat-item .stat-num { font-size: 2.2rem; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--secondary); }
        .faq-question .icon { font-size: 1.2rem; color: var(--text-light); transition: var(--transition); }
        .faq-item.open .faq-question .icon { transform: rotate(180deg); color: var(--secondary); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(233,69,96,0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-block .container { position: relative; z-index: 2; text-align: center; }
        .cta-block h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
        .cta-block p { color: rgba(255,255,255,0.6); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
        .cta-block .btn-primary-custom { font-size: 1.1rem; padding: 16px 48px; }
        @media (max-width: 768px) { .cta-block h2 { font-size: 1.6rem; } }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255,255,255,0.6);
            padding: 60px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { font-size: 1.2rem; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: #fff; }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--secondary); color: #fff; }
        @media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 576px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== Breadcrumb (inner pages) ===== */
        .breadcrumb-nav {
            padding: 16px 0;
            font-size: 0.85rem;
            color: var(--text-light);
            background: var(--light-alt);
        }
        .breadcrumb-nav a { color: var(--text-light); }
        .breadcrumb-nav a:hover { color: var(--secondary); }
        .breadcrumb-nav span { color: var(--text); font-weight: 500; }

        /* ===== Responsive Helpers ===== */
        @media (max-width: 768px) {
            .header-brand-row { height: 56px; padding: 0 16px; }
            .site-logo { font-size: 1.1rem; }
            .site-logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
            .nav-channel-row { height: 42px; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up { animation: fadeInUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }

/* roulang page: article */
/* ========== Design Variables ========== */
        :root {
            --primary: #6c3cf0;
            --primary-light: #8b5cf6;
            --primary-dark: #5a2dd1;
            --primary-bg: #f4f0fe;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-body: #f8f7fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #1e1b4b;
            --bg-dark-alt: #2e2a5e;
            --text-primary: #1a1625;
            --text-body: #3d3852;
            --text-muted: #7c7790;
            --text-light: #a5a0ba;
            --text-white: #f1f0f8;
            --border-color: #e6e3ef;
            --border-light: #f0eef6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(108,60,240,0.06);
            --shadow-md: 0 6px 24px rgba(108,60,240,0.10);
            --shadow-lg: 0 12px 40px rgba(108,60,240,0.14);
            --shadow-hover: 0 20px 48px rgba(108,60,240,0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
            --nav-h: 52px;
        }

        /* ========== 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(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-primary); line-height: 1.3; font-weight: 700; }
        h1 { font-size: 2.25rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 72px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-title p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        .mx-2 { margin: 0 0.5rem; }
        .me-2 { margin-right: 0.5rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-2 { gap: 0.75rem; }
        .gap-3 { gap: 1.25rem; }

        /* ========== Header & Navigation ========== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .site-logo:hover { color: var(--primary); }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(108,60,240,0.25);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-actions .search-toggle,
        .header-actions .menu-toggle {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-body);
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .header-actions .search-toggle:hover,
        .header-actions .menu-toggle:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .header-actions .menu-toggle { display: none; }
        .header-search {
            position: relative;
            width: 220px;
        }
        .header-search input {
            width: 100%;
            padding: 8px 38px 8px 16px;
            border: 1px solid var(--border-color);
            border-radius: 40px;
            background: var(--bg-body);
            color: var(--text-body);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .header-search input:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108,60,240,0.10);
            background: var(--bg-white);
        }
        .header-search button {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            background: transparent;
            color: var(--text-muted);
            padding: 6px 10px;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .header-search button:hover { color: var(--primary); }

        /* Nav Channel */
        .nav-channel {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: var(--header-h);
            z-index: 999;
        }
        .nav-channel-list {
            display: flex;
            align-items: center;
            gap: 4px;
            height: var(--nav-h);
            overflow-x: auto;
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .nav-channel-list::-webkit-scrollbar { display: none; }
        .nav-channel-list a {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-channel-list a:hover {
            color: var(--primary);
            background: var(--primary-bg);
            border-color: var(--border-color);
        }
        .nav-channel-list a.active {
            color: var(--primary);
            background: var(--primary-bg);
            border-color: var(--primary-light);
            font-weight: 600;
        }
        .nav-channel-list a .nav-badge {
            display: inline-block;
            background: var(--secondary);
            color: #fff;
            font-size: 0.7rem;
            padding: 0 8px;
            border-radius: 40px;
            margin-left: 6px;
            font-weight: 600;
        }

        /* ========== Article Hero ========== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 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;
            pointer-events: none;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 2;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-hero .breadcrumb a {
            color: var(--text-light);
            transition: var(--transition);
        }
        .article-hero .breadcrumb a:hover { color: var(--secondary-light); }
        .article-hero .breadcrumb .sep { color: var(--text-muted); }
        .article-hero .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 20px;
        }
        .article-hero .article-meta .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
        }
        .article-hero .article-meta .badge.category {
            background: var(--secondary);
            color: #1a1625;
        }
        .article-hero .article-meta .date {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-hero .article-meta .date i { margin-right: 6px; }
        .article-hero h1 {
            color: var(--text-white);
            font-size: 2.4rem;
            line-height: 1.3;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .article-hero .article-desc {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 700px;
            line-height: 1.7;
        }

        /* ========== Article Content ========== */
        .article-content-wrap {
            padding: 56px 0 72px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-body .content h2,
        .article-body .content h3,
        .article-body .content h4 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
        }
        .article-body .content p {
            margin-bottom: 1.2em;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.2em;
            padding-left: 1.6em;
        }
        .article-body .content ul li {
            list-style-type: disc;
            margin-bottom: 0.4em;
        }
        .article-body .content ol li {
            list-style-type: decimal;
            margin-bottom: 0.4em;
        }
        .article-body .content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover { color: var(--primary-dark); }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.5em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary-light);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-primary);
        }
        .article-body .content pre {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 1.5em 0;
        }
        .article-body .content code {
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            background: var(--primary-bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body .content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }
        .article-tags {
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }
        .article-tags .tag-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            font-size: 0.8rem;
            color: var(--text-body);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary);
        }
        .article-nav {
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-body);
            font-size: 0.9rem;
            transition: var(--transition);
            background: var(--bg-white);
        }
        .article-nav a:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        /* ========== Related Section ========== */
        .related-section {
            background: var(--bg-body);
            padding: 56px 0 72px;
            border-top: 1px solid var(--border-light);
        }
        .related-section .section-title { margin-bottom: 36px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 18px 20px 22px;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h3 a {
            color: var(--text-primary);
        }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .card-body .card-meta i { margin-right: 4px; }

        /* ========== Not Found ========== */
        .not-found-wrap {
            padding: 100px 0;
            text-align: center;
        }
        .not-found-wrap .nf-icon {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-wrap h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .not-found-wrap p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .not-found-wrap .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-wrap .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-top: 12px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: var(--text-light);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary-light); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 0;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--text-light);
        }
        .footer-bottom a:hover { color: var(--secondary-light); }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-search { display: none; }
            .header-actions .menu-toggle { display: flex; }
            .nav-channel-list { gap: 2px; }
            .nav-channel-list a {
                padding: 5px 14px;
                font-size: 0.82rem;
            }
            .article-hero { padding: 56px 0 40px; }
            .article-hero h1 { font-size: 1.7rem; }
            .article-hero .article-desc { font-size: 1rem; }
            .article-body { padding: 28px 24px; }
            .article-body .content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 48px 0; }
            .section-title h2 { font-size: 1.6rem; }
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .article-nav { flex-direction: column; }
            .article-nav a { width: 100%; justify-content: center; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.4rem; }
            .article-body { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-hero .article-meta { gap: 10px; }
            .article-hero .article-meta .badge { font-size: 0.7rem; padding: 3px 10px; }
            .nav-channel-list a { font-size: 0.75rem; padding: 4px 10px; }
            .header-inner { height: 60px; }
            .site-logo { font-size: 1.1rem; }
            .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
            :root { --header-h: 60px; --nav-h: 44px; }
        }

/* roulang page: category1 */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary: #ec4899;
  --accent: #f59e0b;
  --bg: #0f0f1a;
  --bg-alt: #1a1a2e;
  --bg-card: #1e1e36;
  --bg-card-hover: #252548;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-weak: #64748b;
  --border: rgba(99,102,241,0.2);
  --border-hover: rgba(99,102,241,0.5);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.3);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--primary-light);text-decoration:none;transition:var(--transition)}
a:hover{color:#fff}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:1rem}
ul{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* header & nav */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(15,15,26,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.site-logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:#fff;letter-spacing:-0.5px}
.site-logo .logo-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;flex-shrink:0}
.site-logo:hover{color:#fff;opacity:0.9}
.nav-channel{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;padding:0 12px;flex:1;justify-content:center}
.nav-channel::-webkit-scrollbar{display:none}
.nav-channel a{position:relative;padding:8px 20px;border-radius:100px;font-size:0.9rem;font-weight:500;color:var(--text-muted);white-space:nowrap;transition:var(--transition);border:1px solid transparent}
.nav-channel a:hover{color:#fff;background:rgba(99,102,241,0.1);border-color:var(--border)}
.nav-channel a.active{color:#fff;background:linear-gradient(135deg,var(--primary),var(--secondary));border-color:transparent;box-shadow:0 4px 20px rgba(99,102,241,0.35)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-search{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:transparent;color:var(--text-muted);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);font-size:1rem}
.nav-search:hover{color:#fff;border-color:var(--primary);background:rgba(99,102,241,0.1)}
.mobile-toggle{display:none;width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:transparent;color:var(--text-muted);align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;transition:var(--transition)}
.mobile-toggle:hover{color:#fff;border-color:var(--primary)}
@media(max-width:900px){
  .nav-channel{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(15,15,26,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:16px 24px;gap:8px;transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition);border-bottom:1px solid var(--border);align-items:stretch;z-index:999}
  .nav-channel.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-channel a{padding:12px 20px;border-radius:var(--radius-sm);text-align:center}
  .mobile-toggle{display:flex}
  .nav-search{display:none}
}
@media(max-width:520px){
  .site-logo{font-size:1.1rem}
  .site-logo .logo-icon{width:30px;height:30px;font-size:0.95rem}
}

/* page banner */
.page-banner{position:relative;margin-top:var(--header-h);padding:100px 0 80px;background:linear-gradient(135deg,#0f0f1a 40%,rgba(99,102,241,0.15)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;overflow:hidden}
.page-banner::after{content:'';position:absolute;bottom:0;left:0;right:0;height:120px;background:linear-gradient(to top,var(--bg),transparent)}
.page-banner .container{position:relative;z-index:2}
.banner-badge{display:inline-block;padding:6px 18px;border-radius:100px;background:rgba(99,102,241,0.2);border:1px solid var(--border);color:var(--primary-light);font-size:0.82rem;font-weight:600;letter-spacing:0.5px;margin-bottom:16px}
.page-banner h1{font-size:3rem;font-weight:900;color:#fff;line-height:1.2;margin-bottom:16px;max-width:720px}
.page-banner h1 span{background:linear-gradient(135deg,var(--primary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-banner p{font-size:1.15rem;color:var(--text-muted);max-width:580px;line-height:1.8;margin-bottom:24px}
.banner-stats{display:flex;gap:32px;flex-wrap:wrap;margin-top:8px}
.banner-stats .stat-item{text-align:center}
.banner-stats .stat-num{font-size:1.8rem;font-weight:800;color:#fff;line-height:1.2}
.banner-stats .stat-label{font-size:0.82rem;color:var(--text-weak);margin-top:2px}
@media(max-width:768px){
  .page-banner{padding:60px 0 50px}
  .page-banner h1{font-size:2rem}
  .page-banner p{font-size:1rem}
  .banner-stats{gap:20px}
  .banner-stats .stat-num{font-size:1.4rem}
}
@media(max-width:520px){
  .page-banner h1{font-size:1.7rem}
  .banner-stats{gap:14px}
}

/* section general */
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:12px;letter-spacing:-0.5px}
.section-header h2 span{background:linear-gradient(135deg,var(--primary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.section-header p{font-size:1.05rem;color:var(--text-muted);max-width:600px;margin:0 auto}
.section-sub{display:inline-block;padding:4px 14px;border-radius:100px;background:rgba(99,102,241,0.12);border:1px solid var(--border);color:var(--primary-light);font-size:0.78rem;font-weight:600;letter-spacing:0.3px;margin-bottom:12px;text-transform:uppercase}
@media(max-width:768px){
  .section{padding:56px 0}
  .section-header{margin-bottom:32px}
  .section-header h2{font-size:1.7rem}
}

/* tag filters */
.tag-filter{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px}
.tag-filter .tag{display:inline-block;padding:7px 20px;border-radius:100px;border:1px solid var(--border);background:transparent;color:var(--text-muted);font-size:0.85rem;font-weight:500;cursor:pointer;transition:var(--transition)}
.tag-filter .tag:hover{border-color:var(--primary);color:#fff;background:rgba(99,102,241,0.1)}
.tag-filter .tag.active{background:linear-gradient(135deg,var(--primary),var(--secondary));border-color:transparent;color:#fff;box-shadow:0 4px 20px rgba(99,102,241,0.3)}

/* card grid */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:1024px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.card-grid{grid-template-columns:1fr}}

.guide-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:var(--transition);display:flex;flex-direction:column}
.guide-card:hover{transform:translateY(-6px);border-color:var(--border-hover);box-shadow:var(--shadow);background:var(--bg-card-hover)}
.guide-card .card-img{position:relative;height:200px;overflow:hidden;flex-shrink:0}
.guide-card .card-img img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.guide-card:hover .card-img img{transform:scale(1.05)}
.guide-card .card-img .card-tag{position:absolute;top:12px;left:12px;padding:4px 12px;border-radius:100px;background:rgba(99,102,241,0.85);backdrop-filter:blur(4px);color:#fff;font-size:0.75rem;font-weight:600;letter-spacing:0.3px}
.guide-card .card-img .card-duration{position:absolute;bottom:12px;right:12px;padding:3px 10px;border-radius:100px;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);color:#fff;font-size:0.72rem;font-weight:500}
.guide-card .card-body{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column}
.guide-card .card-body h3{font-size:1.1rem;font-weight:700;color:#fff;margin-bottom:8px;line-height:1.4}
.guide-card .card-body h3 a{color:#fff}
.guide-card .card-body h3 a:hover{color:var(--primary-light)}
.guide-card .card-body p{font-size:0.88rem;color:var(--text-muted);line-height:1.7;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid rgba(99,102,241,0.1)}
.card-meta .meta-left{display:flex;align-items:center;gap:10px;font-size:0.8rem;color:var(--text-weak)}
.card-meta .meta-left i{font-size:0.75rem;color:var(--primary-light)}
.card-meta .meta-right{font-size:0.78rem;color:var(--text-weak);background:rgba(99,102,241,0.08);padding:3px 12px;border-radius:100px}

/* hot list */
.hot-list{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:768px){.hot-list{grid-template-columns:1fr}}
.hot-item{display:flex;align-items:center;gap:16px;background:var(--bg-card);border-radius:var(--radius-sm);padding:18px 20px;border:1px solid var(--border);transition:var(--transition);cursor:default}
.hot-item:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateX(4px)}
.hot-index{width:32px;height:32px;border-radius:50%;background:rgba(99,102,241,0.15);color:var(--primary-light);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:0.85rem;flex-shrink:0}
.hot-index.top3{background:linear-gradient(135deg,var(--accent),#ef4444);color:#fff}
.hot-item .hot-info{flex:1;min-width:0}
.hot-item .hot-info h4{font-size:0.95rem;font-weight:600;color:#fff;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hot-item .hot-info span{font-size:0.78rem;color:var(--text-weak)}
.hot-item .hot-views{font-size:0.78rem;color:var(--text-weak);white-space:nowrap}

/* faq */
.faq-grid{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border);overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--border-hover)}
.faq-q{width:100%;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;background:none;border:none;color:#fff;font-size:1rem;font-weight:600;cursor:pointer;text-align:left;transition:var(--transition);gap:16px}
.faq-q i{font-size:0.8rem;color:var(--primary-light);transition:var(--transition);flex-shrink:0}
.faq-q[aria-expanded="true"] i{transform:rotate(180deg)}
.faq-q:hover{background:rgba(99,102,241,0.05)}
.faq-a{padding:0 24px 18px;color:var(--text-muted);font-size:0.92rem;line-height:1.8;display:none}
.faq-item.open .faq-a{display:block}

/* cta */
.cta-section{background:linear-gradient(135deg,var(--bg-alt) 0%,rgba(99,102,241,0.08) 100%);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.cta-box{text-align:center;padding:20px 0}
.cta-box h2{font-size:2rem;font-weight:800;color:#fff;margin-bottom:12px}
.cta-box p{font-size:1.05rem;color:var(--text-muted);max-width:520px;margin:0 auto 28px}
.btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;border-radius:100px;font-weight:600;font-size:0.95rem;border:none;cursor:pointer;transition:var(--transition);text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 4px 24px rgba(99,102,241,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(99,102,241,0.45);color:#fff}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text-muted)}
.btn-outline:hover{border-color:var(--primary);color:#fff;background:rgba(99,102,241,0.1);transform:translateY(-2px)}
@media(max-width:520px){
  .cta-box h2{font-size:1.5rem}
  .btn{padding:10px 24px;font-size:0.88rem}
}

/* footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;margin-bottom:36px}
.footer-brand .site-logo{font-size:1.2rem;margin-bottom:12px}
.footer-brand p{font-size:0.88rem;color:var(--text-muted);line-height:1.8;max-width:360px}
.footer-col h4{font-size:0.95rem;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:0.3px}
.footer-col a{display:block;padding:4px 0;font-size:0.86rem;color:var(--text-muted);transition:var(--transition)}
.footer-col a:hover{color:var(--primary-light);padding-left:4px}
.footer-social{display:flex;gap:12px;margin-top:8px}
.footer-social a{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:0.95rem;padding:0;transition:var(--transition)}
.footer-social a:hover{color:#fff;border-color:var(--primary);background:rgba(99,102,241,0.15);padding:0;transform:translateY(-2px)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 0;border-top:1px solid var(--border);font-size:0.82rem;color:var(--text-weak);flex-wrap:wrap;gap:8px}
.footer-bottom a{color:var(--text-weak);font-size:0.82rem}
.footer-bottom a:hover{color:var(--primary-light)}
.mx-2{margin:0 8px}
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:520px){
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
  .site-footer{padding:40px 0 0}
}

/* scroll top */
.scroll-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;border:none;font-size:1.1rem;cursor:pointer;box-shadow:0 4px 20px rgba(99,102,241,0.35);transition:var(--transition);z-index:99;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(20px)}
.scroll-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(99,102,241,0.5)}