/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #C8102E;
            --color-primary-dark: #A00D24;
            --color-primary-light: #E81A3A;
            --color-accent: #FFD700;
            --color-accent-dark: #E6C200;
            --color-dark: #1A1A2E;
            --color-dark-soft: #2A2A3E;
            --color-bg: #F8F9FA;
            --color-bg-alt: #FFFFFF;
            --color-bg-card: #FFFFFF;
            --color-text: #1E1E2A;
            --color-text-soft: #5A5A6A;
            --color-text-light: #8A8A9A;
            --color-border: #E8E8EE;
            --color-border-light: #F0F0F5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 16px 60px rgba(0,0,0,0.16);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--color-primary); }
        a:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        button:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
        input, textarea { font-family: inherit; font-size: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 10px 16px; transition: border-color var(--transition-fast); }
        input:focus, textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(200,16,46,0.12); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--color-dark); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }
        ::selection { background: var(--color-primary); color: #fff; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .container-narrow { max-width: 880px; }
        .container-wide { max-width: 1360px; }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .text-primary { color: var(--color-primary); }
        .text-accent { color: var(--color-accent); }
        .text-soft { color: var(--color-text-soft); }
        .text-light { color: var(--color-text-light); }
        .fw-bold { font-weight: 700; }
        .mb-sm { margin-bottom: var(--spacing-sm); }
        .mb-md { margin-bottom: var(--spacing-md); }
        .mb-lg { margin-bottom: var(--spacing-lg); }
        .mb-xl { margin-bottom: var(--spacing-xl); }
        .mb-2xl { margin-bottom: var(--spacing-2xl); }
        .mt-lg { margin-top: var(--spacing-lg); }
        .mt-xl { margin-top: var(--spacing-xl); }
        .section-padding { padding: var(--spacing-3xl) 0; }
        .section-padding-sm { padding: var(--spacing-2xl) 0; }
        .bg-white { background: var(--color-bg-alt); }
        .bg-light { background: var(--color-bg); }
        .bg-dark { background: var(--color-dark); color: #E8E8EE; }
        .bg-dark h1, .bg-dark h2, .bg-dark h3 { color: #fff; }
        .bg-dark .text-soft { color: #B0B0C0; }
        .rounded-md { border-radius: var(--radius-md); }
        .shadow-hover { transition: box-shadow var(--transition-base), transform var(--transition-base); }
        .shadow-hover:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            text-align: center;
            line-height: 1.4;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(200,16,46,0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200,16,46,0.25);
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-dark);
            border-color: var(--color-accent);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255,215,0,0.4);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.6);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            background: transparent;
            color: var(--color-dark);
            border-color: var(--color-border);
        }
        .btn-outline-dark:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: var(--radius-md); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 100px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .badge-primary { background: rgba(200,16,46,0.12); color: var(--color-primary); }
        .badge-accent { background: rgba(255,215,0,0.2); color: #8A6D00; }
        .badge-dark { background: rgba(26,26,46,0.1); color: var(--color-dark); }
        .badge-light { background: rgba(255,255,255,0.15); color: #fff; }

        /* ===== Card ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
        .card-body { padding: var(--spacing-lg); }
        .card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.3; }
        .card-text { font-size: 0.9rem; color: var(--color-text-soft); line-height: 1.5; }
        .card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--color-text-light); margin-top: 12px; }

        /* ===== Section Header ===== */
        .section-header { margin-bottom: var(--spacing-2xl); }
        .section-header .subtitle {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { color: var(--color-text-soft); max-width: 600px; font-size: 1.05rem; }
        .section-header.text-center p { margin: 0 auto; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--nav-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }
        .site-header.scrolled { box-shadow: 0 2px 24px rgba(0,0,0,0.06); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .logo { font-size: 1.4rem; font-weight: 800; color: var(--color-dark); letter-spacing: -0.5px; }
        .logo span { color: var(--color-primary); }
        .logo:hover { color: var(--color-dark); }
        .nav-links { display: flex; align-items: center; gap: 4px; }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            color: var(--color-text-soft);
        }
        .nav-link:hover { background: rgba(200,16,46,0.06); color: var(--color-primary); }
        .nav-link.active { background: rgba(200,16,46,0.1); color: var(--color-primary); font-weight: 600; }
        .nav-cta { margin-left: 16px; }
        .nav-cta .btn { padding: 9px 22px; font-size: 0.88rem; }
        .mobile-toggle { display: none; font-size: 1.5rem; color: var(--color-dark); padding: 6px; background: none; border: none; cursor: pointer; }
        .mobile-toggle:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

        /* ===== Hero (分屏) ===== */
        .hero {
            padding-top: var(--nav-height);
            min-height: 90vh;
            display: flex;
            align-items: stretch;
            background: var(--color-dark);
            overflow: hidden;
            position: relative;
        }
        .hero-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            width: 100%;
        }
        .hero-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: var(--spacing-3xl) var(--spacing-lg);
            padding-left: calc((100vw - var(--max-width)) / 2 + var(--spacing-lg));
            max-width: 640px;
            color: #fff;
            position: relative;
            z-index: 2;
        }
        .hero-content .badge { margin-bottom: 16px; }
        .hero-content h1 { color: #fff; margin-bottom: 16px; }
        .hero-content p { font-size: 1.1rem; color: rgba(255,255,255,0.7); margin-bottom: 28px; max-width: 520px; }
        .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
        .hero-visual {
            position: relative;
            overflow: hidden;
            min-height: 60vh;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.5) 0%, transparent 60%);
        }
        .hero-visual .hero-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .hero-wave {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--color-bg);
            clip-path: ellipse(70% 100% at 50% 100%);
            z-index: 2;
        }
        @media (max-width: 1024px) {
            .hero-split { grid-template-columns: 1fr; }
            .hero-content {
                padding: var(--spacing-2xl) var(--spacing-lg);
                max-width: 100%;
                padding-left: var(--spacing-lg);
            }
            .hero-visual { min-height: 40vh; order: -1; }
            .hero-wave { height: 50px; }
        }

        /* ===== Platform Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-2xl);
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-image img { width: 100%; height: 400px; object-fit: cover; display: block; }
        .intro-text h2 { margin-bottom: 16px; }
        .intro-text p { color: var(--color-text-soft); font-size: 1.05rem; }
        .intro-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); margin-top: var(--spacing-xl); }
        .stat-item { text-align: center; padding: var(--spacing-md); background: var(--color-bg); border-radius: var(--radius-md); }
        .stat-item .num { font-size: 2rem; font-weight: 800; color: var(--color-primary); line-height: 1.2; }
        .stat-item .label { font-size: 0.85rem; color: var(--color-text-light); margin-top: 4px; }
        @media (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; }
            .intro-stats { grid-template-columns: repeat(3, 1fr); }
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            cursor: pointer;
            display: block;
        }
        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .category-card .card-img { aspect-ratio: 4/3; }
        .category-card .card-body { padding: var(--spacing-md) var(--spacing-lg); }
        .category-card .card-title { font-size: 1.05rem; margin-bottom: 4px; }
        .category-card .card-text { font-size: 0.85rem; }
        .category-card .badge { position: absolute; top: 12px; left: 12px; z-index: 2; }
        @media (max-width: 768px) {
            .category-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .category-grid { grid-template-columns: 1fr; }
        }

        /* ===== Latest Posts (CMS) ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .post-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .post-card .card-img { aspect-ratio: 16/9; }
        .post-card .card-body { padding: var(--spacing-lg); }
        .post-card .card-title { font-size: 1.05rem; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card .card-text { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card .card-meta { margin-top: 12px; }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-2xl);
            color: var(--color-text-light);
            background: var(--color-bg);
            border-radius: var(--radius-md);
            font-size: 1.05rem;
        }
        @media (max-width: 768px) {
            .posts-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .posts-grid { grid-template-columns: 1fr; }
        }

        /* ===== Advantages / Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .feature-item {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-lg);
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }
        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: rgba(200,16,46,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-primary);
        }
        .feature-item h4 { margin-bottom: 8px; }
        .feature-item p { font-size: 0.9rem; color: var(--color-text-soft); }
        @media (max-width: 768px) {
            .features-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .features-grid { grid-template-columns: 1fr; }
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-lg);
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            position: relative;
        }
        .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
        }
        .step-item h4 { margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: var(--color-text-soft); }
        .step-arrow { display: none; }
        @media (max-width: 768px) {
            .steps-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: var(--spacing-lg) 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            color: var(--color-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
        }
        .faq-question:hover { color: var(--color-primary); }
        .faq-question .icon {
            font-size: 1.2rem;
            transition: transform var(--transition-fast);
            flex-shrink: 0;
            color: var(--color-text-light);
        }
        .faq-item.open .faq-question .icon { transform: rotate(45deg); color: var(--color-primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            color: var(--color-text-soft);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: var(--spacing-3xl) 0;
            color: #fff;
        }
        .cta-inner h2 { color: #fff; margin-bottom: 12px; }
        .cta-inner p { color: rgba(255,255,255,0.7); margin-bottom: 28px; max-width: 540px; margin-left: auto; margin-right: auto; }
        .cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 12px; display: inline-block; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; }
        .footer-col h5 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            transition: color var(--transition-fast);
        }
        .footer-col a:hover { color: var(--color-accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            transition: all var(--transition-fast);
            font-size: 1rem;
        }
        .footer-socials a:hover { background: var(--color-primary); color: #fff; }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: var(--spacing-md) var(--spacing-lg);
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition-base);
                pointer-events: none;
                box-shadow: 0 8px 32px rgba(0,0,0,0.08);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-link { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
        }

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

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

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-soft: #f0f2f5;
            --bg-dark: #1a1a2e;
            --text-primary: #1e1e2f;
            --text-secondary: #4a4a5a;
            --text-muted: #7f8c8d;
            --text-light: #bdc3c7;
            --text-white: #fefefe;
            --border-color: #e0e4e8;
            --border-light: #edf0f3;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 48px rgba(0,0,0,0.10);
            --shadow-hover: 0 16px 40px rgba(192,57,43,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-w: 1200px;
            --nav-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        ::selection { background: var(--primary); color: #fff; }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-h);
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo span { color: var(--primary); }
        .logo i { color: var(--primary); font-size: 1.3rem; margin-right: 6px; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover { color: var(--primary); background: rgba(192,57,43,0.05); }
        .nav-link.active {
            color: var(--primary);
            background: rgba(192,57,43,0.08);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-cta { margin-left: 12px; }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff !important;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(192,57,43,0.25);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: none; }
        .btn-sm { padding: 6px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn-outline {
            background: transparent;
            color: var(--primary) !important;
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff !important;
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            color: var(--text-primary);
            padding: 4px 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: rgba(0,0,0,0.04); }

        /* ===== Hero / Banner (内页小banner) ===== */
        .page-banner {
            margin-top: var(--nav-h);
            padding: 60px 0 48px;
            background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%);
            position: relative;
            overflow: hidden;
        }
        .page-banner::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;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2rem;
            max-width: 720px;
            margin-bottom: 12px;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.65);
            margin-bottom: 16px;
        }
        .breadcrumb a { color: rgba(255,255,255,0.75); }
        .breadcrumb a:hover { color: #fff; }
        .breadcrumb span { color: rgba(255,255,255,0.5); }
        .breadcrumb .sep { margin: 0 4px; color: rgba(255,255,255,0.35); }

        /* ===== Article Main ===== */
        .article-section {
            padding: 48px 0 64px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            padding-bottom: 20px;
            margin-bottom: 28px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .article-meta .tag {
            background: rgba(192,57,43,0.08);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.8rem;
        }
        .article-meta i { margin-right: 5px; opacity: 0.7; }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content p { margin-bottom: 1.4rem; }
        .article-content h2, .article-content h3 { margin-top: 2rem; margin-bottom: 0.8rem; color: var(--text-primary); }
        .article-content img { border-radius: var(--radius-md); margin: 1.6rem 0; box-shadow: var(--shadow-sm); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-soft);
            padding: 16px 22px;
            margin: 1.6rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content ul, .article-content ol {
            padding-left: 1.6rem;
            margin-bottom: 1.4rem;
            color: var(--text-secondary);
        }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 0.4rem; }

        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            gap: 20px;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 0.92rem;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg-soft);
            transition: all var(--transition);
        }
        .article-nav a:hover { background: rgba(192,57,43,0.08); color: var(--primary); }
        .article-nav .next { margin-left: auto; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h4 {
            font-size: 1.05rem;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i { color: var(--primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            font-size: 0.92rem;
            color: var(--text-secondary);
            display: block;
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            font-size: 0.8rem;
            padding: 5px 14px;
            border-radius: 20px;
            background: var(--bg-soft);
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            padding: 28px 22px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .sidebar-cta h5 { color: #fff; font-size: 1.1rem; margin-bottom: 8px; }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 16px; }
        .sidebar-cta .btn { background: #fff; color: var(--primary) !important; border-color: #fff; }
        .sidebar-cta .btn:hover { background: rgba(255,255,255,0.9); transform: translateY(-2px); }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 48px 0 56px;
            background: var(--bg-soft);
        }
        .related-section h2 { margin-bottom: 32px; text-align: center; }
        .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;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; }
        .related-card-body { padding: 18px 20px 20px; }
        .related-card-body h4 { font-size: 1rem; margin-bottom: 6px; }
        .related-card-body h4 a { color: var(--text-primary); }
        .related-card-body h4 a:hover { color: var(--primary); }
        .related-card-body .meta { font-size: 0.8rem; color: var(--text-muted); }

        /* ===== Error State ===== */
        .error-state {
            text-align: center;
            padding: 60px 20px;
        }
        .error-state i { font-size: 3rem; color: var(--text-light); margin-bottom: 16px; }
        .error-state h2 { font-size: 1.6rem; color: var(--text-primary); margin-bottom: 8px; }
        .error-state p { color: var(--text-muted); margin-bottom: 24px; }
        .error-state .btn { margin-top: 8px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
        }
        .footer-brand .logo { color: var(--text-white); font-size: 1.4rem; margin-bottom: 12px; display: inline-block; }
        .footer-brand .logo span { color: var(--primary-light); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 320px; margin-top: 8px; }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.6);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.5);
            padding: 4px;
        }
        .footer-socials a:hover { color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 18px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .page-banner h1 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            :root { --nav-h: 64px; }
            .mobile-toggle { display: block; }
            .nav-links {
                position: fixed;
                top: var(--nav-h);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-link { width: 100%; padding: 12px 16px; }
            .nav-cta { margin-left: 0; width: 100; margin-top: 8px; }
            .nav-cta .btn { width: 100%; justify-content: center; }

            .page-banner { padding: 40px 0 32px; }
            .page-banner h1 { font-size: 1.4rem; }

            .article-body { padding: 24px 20px; }
            .article-meta { gap: 10px; font-size: 0.82rem; }
            .article-content { font-size: 0.98rem; }

            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
            .article-nav { flex-direction: column; gap: 12px; }
            .article-nav .next { margin-left: 0; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-body { padding: 18px 14px; }
            .page-banner h1 { font-size: 1.2rem; }
            .btn-sm { font-size: 0.78rem; padding: 5px 14px; }
            .related-card img { height: 140px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #1a1a2e;
            --accent: #f39c12;
            --bg: #0f0f1a;
            --bg-card: #16162a;
            --bg-section: #12121f;
            --bg-light: #1c1c36;
            --text: #f0f0f0;
            --text-muted: #9a9ab0;
            --text-weak: #6a6a88;
            --border: #2a2a4a;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
            --shadow-hover: 0 14px 40px rgba(192, 57, 43, 0.25);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --header-height: 72px;
        }

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

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

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(42, 42, 74, 0.5);
            z-index: 1000;
            transition: var(--transition);
        }

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

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--primary-light);
        }

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

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            color: var(--text);
            background: rgba(192, 57, 43, 0.2);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-light);
            border-radius: 4px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            line-height: 1.2;
            text-align: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(192, 57, 43, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(192, 57, 43, 0.25);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 3px;
        }

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

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: var(--radius-xs);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
            border-radius: var(--radius);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            font-size: 26px;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: var(--transition);
            background: none;
            border: none;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 900px) {
            .menu-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(15, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: rgba(192, 57, 43, 0.2);
                border-left: 4px solid var(--primary-light);
                border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 10px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            :root {
                --header-height: 64px;
            }
            .logo {
                font-size: 20px;
            }
            .nav-links {
                padding: 16px 16px 24px;
            }
        }

        /* ===== Banner / Hero (Category) ===== */
        .category-banner {
            padding: 140px 0 80px;
            background: var(--bg-section);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }

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

        .category-banner h1 {
            font-size: 48px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text) 40%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-banner p {
            font-size: 20px;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 28px;
        }

        .category-banner .badge-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(192, 57, 43, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(192, 57, 43, 0.25);
            transition: var(--transition);
        }

        .badge:hover {
            background: rgba(192, 57, 43, 0.25);
            transform: translateY(-1px);
        }

        .badge-light {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            border-color: var(--border);
        }
        .badge-light:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text);
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 120px 0 60px;
                min-height: 320px;
            }
            .category-banner h1 {
                font-size: 32px;
            }
            .category-banner p {
                font-size: 17px;
            }
        }

        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 26px;
            }
            .category-banner p {
                font-size: 15px;
            }
        }

        /* ===== Section General ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .section-header h2 span {
            color: var(--primary-light);
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 17px;
            max-width: 600px;
            margin: 0 auto;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 20px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== Category Sub Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px 28px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .cat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }

        .cat-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .cat-card:hover::before {
            opacity: 1;
        }

        .cat-card .icon {
            font-size: 42px;
            margin-bottom: 16px;
            color: var(--primary-light);
        }

        .cat-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cat-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 16px;
        }

        .cat-card .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(192, 57, 43, 0.12);
            color: var(--primary-light);
        }

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

        @media (max-width: 520px) {
            .cat-grid {
                grid-template-columns: 1fr;
            }
            .cat-card {
                padding: 24px 16px 20px;
            }
        }

        /* ===== Featured Post Cards ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .post-card:hover {
            transform: translateY(-6px);
            border-color: rgba(192, 57, 43, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .post-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .post-card .body {
            padding: 20px 20px 24px;
        }

        .post-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 8px;
        }
        .post-card .meta .tag-cat {
            background: rgba(192, 57, 43, 0.12);
            color: var(--primary-light);
            padding: 2px 12px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 12px;
        }

        .post-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card h3 a {
            color: var(--text);
        }
        .post-card h3 a:hover {
            color: var(--primary-light);
        }

        .post-card p {
            color: var(--text-muted);
            font-size: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary-light);
        }
        .post-card .read-more i {
            transition: var(--transition);
        }
        .post-card .read-more:hover i {
            transform: translateX(4px);
        }

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

        @media (max-width: 640px) {
            .post-grid {
                grid-template-columns: 1fr;
            }
            .post-card .body {
                padding: 16px 16px 20px;
            }
            .post-card h3 {
                font-size: 16px;
            }
        }

        /* ===== Stats / Data Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 16px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .stat-item:hover {
            border-color: rgba(192, 57, 43, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .stat-item .num {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1.2;
        }
        .stat-item .num span {
            font-size: 20px;
            font-weight: 400;
            color: var(--text-muted);
        }

        .stat-item .label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-item .num {
                font-size: 30px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .num {
                font-size: 26px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            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: rgba(192, 57, 43, 0.2);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-question i {
            color: var(--primary-light);
            transition: var(--transition);
            font-size: 14px;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-section);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 60px 40px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, rgba(192, 57, 43, 0.12), rgba(26, 26, 46, 0.8));
            border: 1px solid rgba(192, 57, 43, 0.2);
        }

        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-box p {
            color: var(--text-muted);
            font-size: 18px;
            max-width: 540px;
            margin: 0 auto 28px;
        }

        .cta-box .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 20px;
            }
            .cta-box h2 {
                font-size: 26px;
            }
            .cta-box p {
                font-size: 16px;
            }
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-socials a {
            display: inline-block;
            font-size: 22px;
            margin-right: 12px;
            color: var(--text-muted);
            padding: 0;
        }
        .footer-socials a:hover {
            color: var(--primary-light);
            padding-left: 0;
            transform: scale(1.1);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 520px) {
            .btn-lg {
                padding: 14px 28px;
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 24px;
            }
        }

        /* ===== Focus Visible ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 3px;
        }

        /* ===== Smooth Scroll Offset ===== */
        .scroll-offset {
            scroll-margin-top: calc(var(--header-height) + 20px);
        }