/* roulang page: index */
/* ===== Design Tokens ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #2d2d4a;
            --primary-dark: #0d0d1a;
            --accent: #c9a84c;
            --accent-light: #e8d08a;
            --accent-dark: #a8882e;
            --bg-body: #faf8f5;
            --bg-card: #ffffff;
            --bg-dark: #0d0d1a;
            --bg-soft: #f0ede8;
            --text-body: #1a1a2e;
            --text-light: #6b6b80;
            --text-inverse: #f5f3f0;
            --text-accent: #c9a84c;
            --border: #e0ddd8;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
            --shadow-md: 0 8px 30px rgba(26,26,46,0.10);
            --shadow-lg: 0 20px 60px rgba(26,26,46,0.14);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 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: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--accent-dark); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--primary); }
        h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); margin-bottom: 0.5em; }
        h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { font-size: 1.1rem; max-width: 640px; margin: 0 auto; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px;
            border-radius: var(--radius-md); font-weight: 600; font-size: 1rem;
            border: none; cursor: pointer; transition: all var(--transition);
            text-decoration: none; line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent); color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(201,168,76,0.3);
        }
        .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(201,168,76,0.4); color: var(--primary-dark); }
        .btn-outline {
            background: transparent; color: var(--text-inverse); border: 2px solid rgba(245,243,240,0.4);
        }
        .btn-outline:hover { background: rgba(245,243,240,0.1); border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
        .btn-dark {
            background: var(--primary); color: var(--text-inverse);
        }
        .btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); color: var(--text-inverse); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 20px;
            font-size: 0.8rem; font-weight: 600; letter-spacing: 0.3px;
            background: var(--bg-soft); color: var(--text-light);
        }
        .badge-accent { background: rgba(201,168,76,0.15); color: var(--accent-dark); }
        .badge-primary { background: rgba(26,26,46,0.08); color: var(--primary); }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height); background: var(--bg-dark);
            border-bottom: 1px solid rgba(245,243,240,0.06);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.5rem; font-weight: 800; color: var(--text-inverse);
            letter-spacing: -0.5px; display: flex; align-items: center; gap: 4px;
        }
        .site-logo span { color: var(--accent); }
        .site-logo:hover { color: var(--text-inverse); }
        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a {
            color: rgba(245,243,240,0.65); font-weight: 500; font-size: 0.95rem;
            position: relative; transition: color var(--transition);
            padding: 4px 0;
        }
        .nav-links a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
            background: var(--accent); transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover { color: var(--text-inverse); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--text-inverse); }
        .nav-links a.active::after { width: 100%; }
        .nav-cta .btn { padding: 10px 24px; font-size: 0.9rem; }
        .nav-toggle { display: none; background: none; border: none; color: var(--text-inverse); font-size: 1.6rem; cursor: pointer; padding: 4px; }

        /* ===== Hero (Split Screen) ===== */
        .hero {
            min-height: 100vh; display: flex; align-items: center;
            background: var(--bg-dark); margin-top: var(--nav-height);
            position: relative; overflow: hidden;
        }
        .hero-split {
            display: grid; grid-template-columns: 1fr 1fr; gap: 0;
            min-height: calc(100vh - var(--nav-height));
        }
        .hero-content {
            display: flex; flex-direction: column; justify-content: center;
            padding: 60px 60px 60px 0; position: relative; z-index: 2;
        }
        .hero-content .badge { margin-bottom: 20px; align-self: flex-start; }
        .hero-content h1 { color: var(--text-inverse); margin-bottom: 20px; }
        .hero-content h1 span { color: var(--accent); }
        .hero-content p { color: rgba(245,243,240,0.7); font-size: 1.15rem; max-width: 480px; margin-bottom: 32px; }
        .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-visual {
            position: relative; display: flex; align-items: center; justify-content: center;
            overflow: hidden; border-radius: var(--radius-lg);
            min-height: 400px;
        }
        .hero-visual img {
            width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg);
            transition: transform 0.6s ease;
        }
        .hero-visual:hover img { transform: scale(1.03); }
        .hero-visual::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.3) 0%, transparent 60%);
            border-radius: var(--radius-lg);
        }
        .hero-glow {
            position: absolute; top: -20%; right: -10%; width: 60%; height: 80%;
            background: radial-gradient(circle, rgba(201,168,76,0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
            padding: 56px 0; text-align: center;
        }
        .stat-item h3 { font-size: 2.8rem; color: var(--accent); margin-bottom: 4px; }
        .stat-item p { font-size: 0.95rem; color: var(--text-light); margin: 0; }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); overflow: hidden;
            transition: all var(--transition); border: 1px solid var(--border);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-body h3 { margin-bottom: 8px; }
        .card-body p { font-size: 0.92rem; margin-bottom: 16px; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.84rem; color: var(--text-light); }
        .card-link { font-weight: 600; color: var(--accent-dark); display: inline-flex; align-items: center; gap: 6px; }
        .card-link:hover { color: var(--accent); }

        /* ===== Features Grid ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card); border-radius: var(--radius-md);
            padding: 36px 28px; border: 1px solid var(--border);
            transition: all var(--transition); text-align: center;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent-light); }
        .feature-icon {
            width: 64px; height: 64px; margin: 0 auto 20px;
            background: rgba(201,168,76,0.1); border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.8rem; color: var(--accent);
        }
        .feature-card h3 { margin-bottom: 12px; }
        .feature-card p { font-size: 0.92rem; margin: 0; }

        /* ===== Category Entry ===== */
        .category-showcase {
            display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
            background: var(--bg-dark); border-radius: var(--radius-lg);
            padding: 56px 60px; overflow: hidden; position: relative;
        }
        .category-showcase::before {
            content: ''; position: absolute; top: -30%; right: -20%;
            width: 60%; height: 80%; background: radial-gradient(circle, rgba(201,168,76,0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-text h2 { color: var(--text-inverse); margin-bottom: 16px; }
        .category-text p { color: rgba(245,243,240,0.7); margin-bottom: 24px; }
        .category-text .btn { margin-top: 8px; }
        .category-image img { border-radius: var(--radius-md); width: 100%; aspect-ratio: 4/3; object-fit: cover; }

        /* ===== Post List (CMS) ===== */
        .post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .post-card .card-body { padding: 20px; }
        .post-card .badge { margin-bottom: 12px; }
        .post-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .post-card h3 a { color: var(--primary); }
        .post-card h3 a:hover { color: var(--accent-dark); }
        .post-card .card-meta { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
        .empty-msg { text-align: center; padding: 40px 20px; color: var(--text-light); font-size: 1.1rem; grid-column: 1 / -1; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 720px; margin: 0 auto; }
        .faq-item {
            border-bottom: 1px solid var(--border); padding: 20px 0;
            cursor: pointer; transition: all var(--transition);
        }
        .faq-item:first-child { border-top: 1px solid var(--border); }
        .faq-question {
            display: flex; justify-content: space-between; align-items: center;
            font-weight: 600; font-size: 1.05rem; color: var(--primary);
        }
        .faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light); font-size: 0.95rem; line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding-top: 16px; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark); border-radius: var(--radius-lg);
            padding: 72px 60px; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -40%; left: -20%;
            width: 70%; height: 100%; background: radial-gradient(circle, rgba(201,168,76,0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section h2 { color: var(--text-inverse); margin-bottom: 16px; }
        .cta-section p { color: rgba(245,243,240,0.7); max-width: 560px; margin: 0 auto 32px; }
        .cta-section .btn { font-size: 1.05rem; padding: 16px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(245,243,240,0.6);
            padding: 48px 0 32px; border-top: 1px solid rgba(245,243,240,0.06);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
        .footer-brand .site-logo { margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; color: rgba(245,243,240,0.5); }
        .footer-col h4 { color: var(--text-inverse); font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(245,243,240,0.5); font-size: 0.9rem; padding: 4px 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(245,243,240,0.06); padding-top: 24px;
            display: flex; justify-content: space-between; align-items: center;
            font-size: 0.84rem; color: rgba(245,243,240,0.35);
            flex-wrap: wrap; gap: 12px;
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { color: rgba(245,243,240,0.35); font-size: 1.1rem; transition: color var(--transition); }
        .footer-social a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-split { grid-template-columns: 1fr; }
            .hero-content { padding: 40px 0; }
            .hero-visual { min-height: 320px; }
            .category-showcase { grid-template-columns: 1fr; padding: 40px 36px; }
            .category-image { order: -1; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .post-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: var(--bg-dark); flex-direction: column; padding: 24px 32px; gap: 20px; border-bottom: 1px solid rgba(245,243,240,0.06); }
            .nav-links.open { display: flex; }
            .nav-toggle { display: block; }
            .nav-cta .btn { padding: 8px 18px; font-size: 0.84rem; }
            .hero-content h1 { font-size: clamp(1.8rem, 8vw, 2.6rem); }
            .hero-content p { font-size: 1rem; }
            .hero-buttons { flex-direction: column; }
            .hero-visual { min-height: 240px; }
            .section { padding: 56px 0; }
            .stats-grid { grid-template-columns: 1fr; gap: 24px; }
            .features-grid { grid-template-columns: 1fr; }
            .post-grid { grid-template-columns: 1fr; }
            .category-showcase { padding: 32px 24px; }
            .cta-section { padding: 48px 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .faq-list { padding: 0; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-content { padding: 24px 0; }
            .hero-visual { min-height: 180px; border-radius: var(--radius-sm); }
            .card-body { padding: 16px; }
            .feature-card { padding: 24px 20px; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
            .section-title p { font-size: 0.95rem; }
        }

        /* ===== Misc Utilities ===== */
        .text-accent { color: var(--accent); }
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .gap-sm { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .relative { position: relative; }
        .overflow-hidden { overflow: hidden; }
        .rounded-full { border-radius: 9999px; }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --color-primary: #6C5CE7;
            --color-primary-light: #A29BFE;
            --color-primary-dark: #4B3DBF;
            --color-secondary: #FD79A8;
            --color-secondary-light: #FDCBDA;
            --color-accent: #FFC75F;
            --color-bg: #FBFBFD;
            --color-bg-alt: #F1EFF9;
            --color-bg-card: #FFFFFF;
            --color-text: #2D2B3E;
            --color-text-weak: #8E8CA0;
            --color-text-inverse: #FFFFFF;
            --color-border: #E6E4F0;
            --color-shadow: rgba(108, 92, 231, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px var(--color-shadow);
            --shadow-md: 0 8px 30px var(--color-shadow);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            padding-top: var(--header-height);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-primary-dark); }
        a:focus-visible { outline: 3px solid var(--color-primary-light); outline-offset: 2px; border-radius: 4px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--color-text); }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em;
            color: var(--color-text); display: flex; align-items: center; gap: 2px;
        }
        .site-logo span { color: var(--color-primary); }
        .site-logo:hover { color: var(--color-text); opacity: 0.85; }

        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a {
            font-size: 0.95rem; font-weight: 500; color: var(--color-text-weak);
            position: relative; padding: 4px 0; transition: color var(--transition);
        }
        .nav-links a::after {
            content: ''; position: absolute; left: 0; bottom: -2px;
            width: 0; height: 2px; background: var(--color-primary);
            border-radius: 2px; transition: width var(--transition);
        }
        .nav-links a:hover { color: var(--color-text); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--color-primary); }
        .nav-links a.active::after { width: 100%; background: var(--color-primary); }
        .nav-links .nav-cta { padding: 0; }
        .nav-links .nav-cta::after { display: none; }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--color-text); padding: 8px; }

        /* ===== Hero (分屏联动) ===== */
        .hero-split {
            position: relative;
            min-height: calc(100vh - var(--header-height));
            display: flex; align-items: center;
            background: var(--color-bg);
            overflow: hidden;
        }
        .hero-split .hero-bg {
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .hero-split .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            width: 100%;
            position: relative;
            z-index: 2;
        }
        .hero-text h1 {
            font-size: 3.2rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero-text h1 span { color: var(--color-primary); }
        .hero-text p {
            font-size: 1.15rem;
            color: var(--color-text-weak);
            max-width: 480px;
            margin-bottom: 32px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-visual {
            display: flex; justify-content: center; align-items: center;
            position: relative;
        }
        .hero-visual .img-frame {
            width: 100%; max-width: 520px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            background: var(--color-bg-card);
            overflow: hidden;
            transform: perspective(800px) rotateY(-4deg) rotateX(2deg);
            transition: transform var(--transition);
        }
        .hero-visual .img-frame:hover { transform: perspective(800px) rotateY(0deg) rotateX(0deg); }
        .hero-visual .img-frame img { width: 100%; height: auto; display: block; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 32px;
            font-size: 1rem; font-weight: 600;
            border-radius: 60px;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn-secondary {
            background: var(--color-bg-card);
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            border-color: var(--color-primary-light);
            background: var(--color-bg-alt);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: var(--color-text);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Section 通用 ===== */
        .section { padding: 100px 0; }
        .section-alt { background: var(--color-bg-alt); }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--color-text-weak);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px auto;
        }
        .section-title-left { text-align: left; }
        .section-sub-left { text-align: left; margin-left: 0; }

        /* ===== 卡片网格 ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }

        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
            transition: all var(--transition);
            border: 1px solid var(--color-border);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary-light);
        }
        .card .card-icon { font-size: 2.2rem; color: var(--color-primary); margin-bottom: 16px; }
        .card h3 { font-size: 1.25rem; margin-bottom: 10px; }
        .card p { color: var(--color-text-weak); font-size: 0.95rem; line-height: 1.6; }
        .card .badge {
            display: inline-block;
            background: var(--color-bg-alt);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 40px;
            margin-bottom: 12px;
        }

        /* ===== 图文卡片 (横向) ===== */
        .media-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .media-card:hover { box-shadow: var(--shadow-md); }
        .media-card .media-visual { padding: 20px; }
        .media-card .media-visual img { border-radius: var(--radius-md); width: 100%; height: 300px; object-fit: cover; }
        .media-card .media-body { padding: 40px 40px 40px 0; }
        .media-card .media-body h3 { font-size: 1.6rem; margin-bottom: 12px; }
        .media-card .media-body p { color: var(--color-text-weak); margin-bottom: 20px; }
        .media-card.reversed .media-visual { order: 2; padding: 20px 20px 20px 0; }
        .media-card.reversed .media-body { padding: 40px 0 40px 40px; }

        /* ===== 步骤流程 ===== */
        .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; }
        .step-card {
            counter-increment: step;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .step-card::before {
            content: counter(step);
            display: inline-flex; align-items: center; justify-content: center;
            width: 48px; height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 1.3rem; font-weight: 700;
            margin-bottom: 18px;
            transition: transform var(--transition);
        }
        .step-card:hover::before { transform: scale(1.1); }
        .step-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .step-card p { color: var(--color-text-weak); font-size: 0.92rem; }

        /* ===== 统计数字 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 36px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-label { color: var(--color-text-weak); font-size: 0.95rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            display: flex; align-items: center; justify-content: space-between;
            padding: 20px 28px;
            font-size: 1.05rem; font-weight: 600;
            color: var(--color-text);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--color-bg-alt); }
        .faq-question .faq-icon { font-size: 1.3rem; color: var(--color-primary); transition: transform var(--transition); }
        .faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 28px;
            color: var(--color-text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px 28px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-xl);
            padding: 72px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .cta-block h2 { font-size: 2.4rem; color: #fff; margin-bottom: 12px; }
        .cta-block p { font-size: 1.1rem; opacity: 0.85; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-block .btn-primary {
            background: #fff;
            color: var(--color-primary);
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
        .cta-block .btn-primary:hover { background: var(--color-bg-alt); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-text);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 32px;
        }
        .site-footer .site-logo { color: #fff; }
        .site-footer .site-logo span { color: var(--color-primary-light); }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            margin-bottom: 28px;
        }
        .footer-brand p { margin-top: 14px; font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: #fff; }
        .footer-bottom {
            display: flex; align-items: center; justify-content: space-between;
            font-size: 0.85rem;
            flex-wrap: wrap; gap: 12px;
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            color: rgba(255,255,255,0.6);
            font-size: 1.2rem;
            transition: color var(--transition);
        }
        .footer-social a:hover { color: #fff; }

        /* ===== 标签 / 徽章 ===== */
        .tag {
            display: inline-block;
            padding: 6px 18px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 40px;
            background: var(--color-bg-alt);
            color: var(--color-primary);
            transition: all var(--transition);
        }
        .tag:hover { background: var(--color-primary); color: #fff; }

        /* ===== 分隔线 ===== */
        .divider { width: 60px; height: 4px; background: var(--color-primary); border-radius: 4px; margin: 0 auto 20px; }
        .divider-left { margin-left: 0; }

        /* ===== 响应式 ===== */

        /* 1024px */
        @media (max-width: 1024px) {
            .hero-text h1 { font-size: 2.6rem; }
            .hero-split .container { gap: 40px; }
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        /* 768px */
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-links {
                position: fixed; top: var(--header-height); left: 0; width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                gap: 0;
                padding: 16px 24px 24px;
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                border-bottom: 1px solid var(--color-border);
                align-items: stretch;
                z-index: 999;
            }
            .nav-links.open { transform: translateY(0); opacity: 1; }
            .nav-links a {
                padding: 14px 0;
                font-size: 1.05rem;
                border-bottom: 1px solid var(--color-border);
            }
            .nav-links a:last-of-type { border-bottom: none; }
            .nav-links a::after { display: none; }
            .nav-links .nav-cta { padding: 8px 0; margin-top: 8px; }
            .nav-links .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }

            .hero-split { min-height: auto; padding: 60px 0 80px; }
            .hero-split .container { grid-template-columns: 1fr; gap: 40px; }
            .hero-text h1 { font-size: 2.2rem; }
            .hero-text p { font-size: 1rem; }
            .hero-visual .img-frame { transform: none; max-width: 100%; }
            .hero-visual .img-frame:hover { transform: none; }

            .section { padding: 64px 0; }
            .section-title { font-size: 1.8rem; }
            .section-sub { font-size: 1rem; margin-bottom: 36px; }

            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
            .steps { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }

            .media-card { grid-template-columns: 1fr; gap: 0; }
            .media-card .media-body { padding: 24px; }
            .media-card .media-visual { padding: 16px; }
            .media-card .media-visual img { height: 200px; }
            .media-card.reversed .media-visual { order: 0; padding: 16px; }
            .media-card.reversed .media-body { padding: 24px; }

            .cta-block { padding: 48px 24px; border-radius: var(--radius-lg); }
            .cta-block h2 { font-size: 1.8rem; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .stat-number { font-size: 2rem; }
        }

        /* 520px */
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-text h1 { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .section-title { font-size: 1.5rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 12px; }
            .stat-number { font-size: 1.6rem; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .faq-answer { padding: 0 18px; }
            .faq-item.open .faq-answer { padding: 0 18px 18px; }
            .cta-block h2 { font-size: 1.5rem; }
            .cta-block { padding: 36px 16px; }
            .card { padding: 24px 18px; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #7C5CFC;
            --primary-light: #9B7FFC;
            --primary-dark: #5B3FD4;
            --secondary: #FF6B9D;
            --secondary-light: #FF8FB8;
            --accent: #FFD166;
            --bg: #F5F3FF;
            --bg-card: #FFFFFF;
            --bg-dark: #1E1A2E;
            --text: #2D2640;
            --text-light: #6E6580;
            --text-white: #FFFFFF;
            --border: #E4DEF0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(124, 92, 252, 0.10);
            --shadow-hover: 0 16px 48px rgba(124, 92, 252, 0.18);
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --gap: 24px;
            --section-pad: 80px 0;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        button { cursor: pointer; font-family: var(--font); border: none; background: none; }
        input, textarea { font-family: var(--font); }
        ul, ol { list-style: none; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; margin-bottom: 16px; }
        h3 { font-size: 1.5rem; margin-bottom: 12px; }
        h4 { font-size: 1.2rem; margin-bottom: 8px; }
        p { margin-bottom: 16px; }
        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            text-align: center;
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 40px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 4px 16px rgba(124,92,252,0.30);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(124,92,252,0.40);
            color: #fff;
        }
        .btn-secondary {
            background: var(--bg-card);
            color: var(--primary);
            border: 2px solid var(--border);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(124,92,252,0.10);
            color: var(--primary);
            transition: var(--transition);
        }
        .badge:hover { background: var(--primary); color: #fff; }
        .badge-secondary {
            background: rgba(255,107,157,0.12);
            color: var(--secondary);
        }
        .badge-secondary:hover { background: var(--secondary); color: #fff; }
        .badge-accent {
            background: rgba(255,209,102,0.20);
            color: #8B7A3A;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .site-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
        }
        .site-logo span { color: var(--primary); }
        .site-logo:hover { color: var(--text); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            padding: 4px 0;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--primary); }
        .nav-links a.active::after { width: 100%; }
        .nav-links a.nav-cta { padding: 0; }
        .nav-links a.nav-cta::after { display: none; }
        .nav-toggle { display: none; font-size: 1.6rem; color: var(--text); padding: 8px; }

        /* ===== Hero Banner (Article) ===== */
        .article-hero {
            margin-top: 72px;
            padding: 100px 0 80px;
            position: relative;
            background: linear-gradient(135deg, rgba(124,92,252,0.08), rgba(255,107,157,0.06));
            overflow: hidden;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .article-hero .badge {
            margin-bottom: 16px;
            display: inline-block;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            max-width: 800px;
            margin-bottom: 16px;
            color: var(--text);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-light);
            font-size: 0.95rem;
            margin-top: 8px;
        }
        .article-meta i { margin-right: 6px; color: var(--primary); }
        .article-meta span { display: inline-flex; align-items: center; }

        /* ===== Article Content ===== */
        .article-main {
            padding: 60px 0 40px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 48px 56px;
            box-shadow: var(--shadow-card);
            max-width: 860px;
            margin: 0 auto;
        }
        .article-body h1, .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 20px;
            color: var(--text);
            line-height: 1.8;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            width: 100%;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 8px; color: var(--text); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(124,92,252,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body a { color: var(--primary); text-decoration: underline; }
        .article-body code {
            background: rgba(124,92,252,0.08);
            padding: 2px 10px;
            border-radius: 6px;
            font-size: 0.9em;
            font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #E4DEF0;
            padding: 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body pre code { background: none; padding: 0; color: inherit; }

        /* ===== Article Footer Nav ===== */
        .article-nav {
            max-width: 860px;
            margin: 32px auto 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
            color: var(--text);
        }
        .article-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow);
        }

        /* ===== Article Not Found ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            max-width: 600px;
            margin: 0 auto;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--primary-light);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-card);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
            margin-top: 40px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card-body {
            padding: 20px 24px 24px;
        }
        .related-card-body .badge { margin-bottom: 10px; }
        .related-card-body h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body h4 a { color: var(--text); }
        .related-card-body h4 a:hover { color: var(--primary); }
        .related-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card-body .article-meta {
            font-size: 0.8rem;
            gap: 12px;
            margin-top: 8px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            margin-bottom: 12px;
            color: #fff;
            -webkit-text-fill-color: #fff;
        }
        .cta-section p {
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
            opacity: 0.9;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .cta-section .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.25);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.80);
            padding: 60px 0 30px;
        }
        .site-footer .site-logo {
            color: #fff;
            font-size: 1.5rem;
            display: inline-block;
            margin-bottom: 12px;
        }
        .site-footer .site-logo:hover { color: #fff; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.60);
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.60);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.40);
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            color: rgba(255,255,255,0.50);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover { color: #fff; transform: scale(1.1); }

        /* ===== Scroll to Top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(124,92,252,0.30);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
        }
        .scroll-top.visible { opacity: 1; visibility: visible; }
        .scroll-top:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(124,92,252,0.40); color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-body { padding: 36px 32px; }
            .article-hero h1 { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            :root { --section-pad: 56px 0; }
            h2 { font-size: 1.8rem; }
            .section-title { font-size: 1.8rem; }
            .site-header .container { height: 64px; }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 16px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                align-items: stretch;
            }
            .nav-links.open { transform: translateY(0); opacity: 1; }
            .nav-links a { padding: 12px 0; font-size: 1.05rem; }
            .nav-links a.nav-cta { margin-top: 8px; }
            .nav-toggle { display: block; }
            .article-hero { padding: 80px 0 60px; margin-top: 64px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-meta { font-size: 0.85rem; gap: 12px; }
            .article-body { padding: 28px 20px; border-radius: var(--radius-sm); }
            .related-grid { grid-template-columns: 1fr; }
            .related-card img { height: 180px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
            .article-nav { flex-direction: column; align-items: stretch; }
            .article-nav a { justify-content: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-body { padding: 20px 16px; }
            .article-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
            .scroll-top { width: 40px; height: 40px; font-size: 1rem; bottom: 20px; right: 20px; }
        }