/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f0a1f;
            --primary-light: #1e1340;
            --primary-mid: #2a1a5e;
            --secondary: #d4a843;
            --secondary-light: #f0d080;
            --accent: #f5c542;
            --accent-glow: rgba(212, 168, 67, 0.25);
            --bg-body: #0a0616;
            --bg-card: #130d28;
            --bg-card-hover: #1d143a;
            --bg-section-alt: #0d0820;
            --text-white: #f5f0ff;
            --text-light: #d8d0ee;
            --text-muted: #9488b8;
            --text-dim: #6a5e8a;
            --border-color: #2a1d4a;
            --border-glow: rgba(212, 168, 67, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(212, 168, 67, 0.08);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        /* ===== 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);
            background: var(--bg-body);
            color: var(--text-light);
            line-height: 1.7;
            font-weight: 400;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--secondary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 4px;
            border-radius: 4px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-white);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }
        ::selection {
            background: var(--secondary);
            color: var(--primary);
        }
        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 6, 22, 0.85);
            backdrop-filter: blur(18px) saturate(1.2);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 6, 22, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
            font-size: 1.4rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-main a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 4px 0;
            letter-spacing: 0.02em;
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-main a:hover {
            color: var(--text-white);
        }
        .nav-main a:hover::after {
            width: 100%;
        }
        .nav-main a.active {
            color: var(--secondary);
        }
        .nav-main a.active::after {
            width: 100%;
            background: var(--secondary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-search {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 8px 18px 8px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.9rem;
            width: 200px;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--secondary);
            box-shadow: 0 0 20px var(--accent-glow);
            width: 240px;
        }
        .nav-search input {
            background: transparent;
            color: var(--text-white);
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-dim);
        }
        .nav-search i {
            color: var(--text-dim);
            font-size: 0.85rem;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: var(--primary) !important;
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.85rem;
            letter-spacing: 0.03em;
            transition: var(--transition);
            box-shadow: 0 2px 16px var(--accent-glow);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 28px var(--accent-glow);
            color: var(--primary) !important;
        }
        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 4px 8px;
            cursor: pointer;
            border-radius: 8px;
        }
        .menu-toggle:hover {
            background: var(--bg-card);
        }
        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding-top: 70px;
            overflow: hidden;
            background: var(--bg-body);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            mask-image: linear-gradient(to right, transparent 0%, #000 40%, #000 70%, transparent 100%);
            -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 40%, #000 70%, transparent 100%);
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(15, 10, 31, 0.7) 0%, var(--bg-body) 80%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content {
            max-width: 580px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 6px 18px 6px 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .hero-badge i {
            color: var(--secondary);
            font-size: 0.7rem;
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 480px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: var(--primary) !important;
            font-weight: 700;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            transition: var(--transition);
            box-shadow: 0 4px 24px var(--accent-glow);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px var(--accent-glow);
            color: var(--primary) !important;
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white) !important;
            border: 1px solid var(--border-color);
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-secondary:hover {
            border-color: var(--secondary);
            background: var(--bg-card);
            color: var(--secondary) !important;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .hero-stat p {
            font-size: 0.8rem;
            color: var(--text-dim);
            margin-bottom: 0;
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            border: 1px solid var(--border-color);
            max-height: 520px;
            object-fit: cover;
            width: 100%;
        }
        .hero-visual::after {
            content: '';
            position: absolute;
            inset: -10px;
            border-radius: var(--radius-xl);
            background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
            z-index: -1;
            opacity: 0.5;
        }
        /* ===== Section general ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-bottom: 12px;
        }
        .section-label i {
            font-size: 0.7rem;
        }
        .section-title {
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 48px;
            line-height: 1.8;
        }
        .section-title-center {
            text-align: center;
        }
        .section-sub-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        /* ===== Feature / Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-text h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
        }
        .intro-text p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--bg-card);
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .intro-feature i {
            color: var(--secondary);
            font-size: 1rem;
            width: 22px;
            text-align: center;
        }
        .intro-feature:hover {
            border-color: var(--secondary);
            transform: translateX(4px);
        }
        .intro-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
            width: 100%;
            height: auto;
        }
        /* ===== Category / Service Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--secondary);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 30px var(--accent-glow);
        }
        .category-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .category-card-body {
            padding: 24px 22px 26px;
        }
        .category-card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            font-weight: 700;
        }
        .category-card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .category-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--secondary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 40px;
            letter-spacing: 0.04em;
            border: 1px solid rgba(212, 168, 67, 0.2);
        }
        .category-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }
        .category-card-footer a {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card-footer a i {
            font-size: 0.7rem;
            transition: var(--transition);
        }
        .category-card-footer a:hover i {
            transform: translateX(4px);
        }
        /* ===== Latest Posts / CMS List ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 26px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .post-card:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8rem;
            color: var(--text-dim);
            margin-bottom: 12px;
        }
        .post-card .post-meta .post-cat {
            background: var(--primary-light);
            color: var(--secondary);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            border: 1px solid rgba(212, 168, 67, 0.15);
        }
        .post-card .post-meta .post-date i {
            margin-right: 4px;
        }
        .post-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .post-card h3 a {
            color: var(--text-white);
        }
        .post-card h3 a:hover {
            color: var(--secondary);
        }
        .post-card .post-excerpt {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .post-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .post-card .post-link i {
            font-size: 0.7rem;
            transition: var(--transition);
        }
        .post-card .post-link:hover i {
            transform: translateX(4px);
        }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-dim);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .empty-posts i {
            font-size: 2.4rem;
            color: var(--text-dim);
            margin-bottom: 16px;
            display: block;
        }
        .empty-posts p {
            font-size: 1rem;
        }
        /* ===== Stats / Process ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .stat-card .stat-number span {
            font-size: 1.2rem;
            color: var(--secondary);
        }
        .stat-card .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 8px;
        }
        /* ===== Process Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 60px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(to right, var(--border-color), var(--secondary), var(--border-color));
            opacity: 0.3;
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-body);
            padding: 0 12px;
        }
        .process-step .step-number {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-mid), var(--primary-light));
            border: 2px solid var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--secondary);
            box-shadow: 0 0 30px var(--accent-glow);
        }
        .process-step h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .process-step p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-white);
            font-size: 1rem;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-section-alt);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            max-width: 300px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-dim);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
            transform: translateY(-3px);
        }
        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-mid);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero p {
                max-width: 100%;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-visual img {
                max-height: 400px;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .process-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(10, 6, 22, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                font-size: 1.1rem;
                padding: 8px 0;
            }
            .nav-search {
                width: 160px;
            }
            .nav-search:focus-within {
                width: 180px;
            }
            .menu-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero .container {
                padding-top: 20px;
                padding-bottom: 40px;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat h3 {
                font-size: 1.5rem;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .header-inner {
                height: 62px;
            }
            .logo {
                font-size: 1.3rem;
            }
            .hero {
                min-height: auto;
                padding-top: 62px;
            }
            .hero-visual img {
                max-height: 280px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                align-items: center;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .post-card {
                padding: 20px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .nav-actions .nav-cta {
                display: none;
            }
            .nav-search {
                width: 120px;
            }
            .nav-search:focus-within {
                width: 150px;
            }
            .category-card img {
                height: 160px;
            }
            .process-step .step-number {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #3a5a9c;
            --primary-dark: #0f1a44;
            --secondary: #e8b830;
            --secondary-light: #f0d060;
            --accent: #ff6b35;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1a44;
            --text-dark: #1a1a2e;
            --text-mid: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e2e6f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.96);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--secondary);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-mid);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.08);
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            width: 160px;
            color: var(--text-dark);
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-search button {
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            padding: 6px;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .nav-search button:hover {
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1.05rem;
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: rgba(26, 42, 108, 0.08);
                border-left: 4px solid var(--secondary);
            }
            .nav-cta .nav-search {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            body {
                padding-top: var(--header-height);
            }
        }
        @media (max-width: 520px) {
            .nav-search input {
                width: 100px;
            }
            .logo {
                font-size: 1.25rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(232, 184, 48, 0.15), transparent 60%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .page-banner h1 i {
            color: var(--secondary);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 700px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a {
            color: var(--secondary-light);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.9);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-title h2 i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-mid);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 16px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .section-title p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== 步骤/流程卡片 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--secondary);
        }
        .step-card .step-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.10;
            position: absolute;
            top: 12px;
            right: 20px;
            line-height: 1;
        }
        .step-card .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(26, 42, 108, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .step-card:hover .step-icon {
            background: var(--primary);
            color: var(--text-white);
        }
        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.95rem;
            color: var(--text-mid);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 28px 18px 22px;
            }
        }

        /* ===== 指南详情卡片 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .guide-card .guide-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(26, 42, 108, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }
        .guide-card .guide-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .guide-card .guide-body p {
            font-size: 0.95rem;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .guide-card .guide-body .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }
        .guide-card .guide-body .tag-list .tag {
            padding: 4px 14px;
            font-size: 0.8rem;
            border-radius: 40px;
            background: rgba(232, 184, 48, 0.12);
            color: var(--primary-dark);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 14px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1.05rem;
            user-select: none;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-item .faq-q i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-q:hover {
            color: var(--primary);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-mid);
            font-size: 0.98rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        @media (max-width: 520px) {
            .faq-item .faq-q {
                padding: 16px 18px;
                font-size: 0.98rem;
            }
            .faq-item .faq-a {
                padding: 0 18px;
                font-size: 0.92rem;
            }
            .faq-item.open .faq-a {
                padding: 0 18px 16px;
            }
        }

        /* ===== 安全提示卡 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .safety-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .safety-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .safety-card .safety-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .safety-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .safety-card p {
            font-size: 0.95rem;
            color: var(--text-mid);
            line-height: 1.6;
        }
        .safety-card .badge {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 18px;
            font-size: 0.8rem;
            border-radius: 40px;
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .safety-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .safety-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 72px 0;
            text-align: center;
            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: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary,
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 48, 0.35);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            border-color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
            color: var(--text-white);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 52px 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== 内容区块（带封面图） ===== */
        .content-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .content-row .content-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .content-row .content-text p {
            font-size: 1rem;
            color: var(--text-mid);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .content-row .content-text ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 16px;
        }
        .content-row .content-text ul li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.98rem;
            color: var(--text-mid);
        }
        .content-row .content-text ul li i {
            color: var(--secondary);
            font-size: 1.1rem;
            width: 20px;
            text-align: center;
        }
        .content-row .content-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .content-row .content-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .content-row .content-image:hover img {
            transform: scale(1.03);
        }
        @media (max-width: 768px) {
            .content-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .content-row .content-text h2 {
                font-size: 1.5rem;
            }
            .content-row .content-image img {
                height: 240px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .stat-item {
            text-align: center;
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-item .stat-num i {
            color: var(--secondary);
            font-size: 1.8rem;
            margin-right: 4px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-mid);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                padding: 28px 20px;
                gap: 20px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                padding: 20px 16px;
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 1.6rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .site-footer .footer-brand .logo span {
            -webkit-text-fill-color: var(--text-white);
            background: none;
        }
        .site-footer .footer-brand .logo i {
            color: var(--secondary);
        }
        .site-footer .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .site-footer .footer-col .footer-social {
            display: flex;
            gap: 12px;
        }
        .site-footer .footer-col .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 0;
            transition: var(--transition);
        }
        .site-footer .footer-col .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 0;
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: var(--secondary-light);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--secondary);
        }
        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #3b82f6;
            --color-primary-lighter: #dbeafe;
            --color-secondary: #7c3aed;
            --color-secondary-dark: #6d28d9;
            --color-secondary-light: #8b5cf6;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-bg-card: #ffffff;
            --color-bg-dark: #0f172a;
            --color-bg-section: #f1f5f9;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-lighter: #94a3b8;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --color-warning: #f59e0b;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-lg: 1.125rem;
            --font-size-xl: 1.25rem;
            --font-size-2xl: 1.5rem;
            --font-size-3xl: 2rem;
            --font-size-4xl: 2.5rem;
            --font-size-5xl: 3rem;
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-4xl: 6rem;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --content-width: 780px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-primary-dark); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-xl);
        }
        @media (max-width: 768px) {
            .container { padding: 0 var(--spacing-md); }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 12px 28px;
            font-size: var(--font-size-sm);
            font-weight: 600;
            border-radius: var(--radius-full);
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-inverse);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }
        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-secondary:hover {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-text);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            color: var(--color-text);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }
        .btn-lg { padding: 16px 36px; font-size: var(--font-size-base); }
        .btn-sm { padding: 8px 18px; font-size: var(--font-size-xs); }
        .btn:focus-visible { outline: 3px solid var(--color-primary-light); outline-offset: 2px; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: var(--font-size-xs);
            font-weight: 600;
            border-radius: var(--radius-full);
            background: var(--color-primary-lighter);
            color: var(--color-primary);
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: #fef3c7;
            color: #92400e;
        }
        .badge-secondary {
            background: #ede9fe;
            color: #6d28d9;
        }
        .badge-success {
            background: #d1fae5;
            color: #065f46;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: var(--color-text);
            text-decoration: none;
        }
        .logo i { color: var(--color-primary); font-size: 1.4em; }
        .logo span { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }
        .nav-main { display: flex; align-items: center; gap: var(--spacing-xs); }
        .nav-main a {
            padding: 8px 18px;
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--color-text-light);
            border-radius: var(--radius-full);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover { color: var(--color-primary); background: var(--color-primary-lighter); }
        .nav-main a.active {
            color: var(--color-text-inverse);
            background: var(--color-primary);
        }
        .nav-main a.active:hover { background: var(--color-primary-dark); }
        .nav-cta { margin-left: var(--spacing-md); }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
        .nav-toggle span { display: block; width: 24px; height: 2.5px; background: var(--color-text); border-radius: 4px; transition: var(--transition); }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-sm);
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-main.open { transform: translateY(0); opacity: 1; }
            .nav-main a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-cta { margin-left: 0; margin-top: var(--spacing-sm); width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: var(--spacing-4xl) 0 var(--spacing-3xl);
            background: var(--color-bg-dark);
            background-image: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(30,27,75,0.88)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: var(--color-text-inverse);
            overflow: hidden;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--color-bg), transparent);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            max-width: var(--content-width);
        }
        .article-hero .badge {
            background: rgba(255,255,255,0.15);
            color: var(--color-text-inverse);
            backdrop-filter: blur(4px);
            margin-bottom: var(--spacing-md);
        }
        .article-hero h1 {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: var(--color-text-inverse);
            line-height: 1.25;
            margin-bottom: var(--spacing-lg);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: var(--spacing-md);
            font-size: var(--font-size-sm);
            color: rgba(255,255,255,0.7);
        }
        .article-meta i { margin-right: 4px; }
        .article-meta span { display: inline-flex; align-items: center; gap: 4px; }
        .article-meta .divider { width: 4px; height: 4px; border-radius: 50%; background: rgba(255,255,255,0.4); }

        @media (max-width: 768px) {
            .article-hero { padding: var(--spacing-2xl) 0 var(--spacing-xl); }
            .article-hero h1 { font-size: var(--font-size-2xl); }
            .article-meta { gap: var(--spacing-sm); font-size: var(--font-size-xs); }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: var(--font-size-xl); }
        }

        /* ===== Article Body ===== */
        .article-section {
            padding: var(--spacing-3xl) 0;
            background: var(--color-bg);
        }
        .article-layout {
            max-width: var(--content-width);
            margin: 0 auto;
        }
        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: var(--spacing-2xl);
            box-shadow: var(--shadow-md);
        }
        .article-featured-image img { width: 100%; height: auto; display: block; }
        .article-content {
            font-size: var(--font-size-base);
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content p {
            margin-bottom: var(--spacing-lg);
        }
        .article-content h2 {
            font-size: var(--font-size-2xl);
            margin-top: var(--spacing-2xl);
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--color-border-light);
            color: var(--color-text);
        }
        .article-content h3 {
            font-size: var(--font-size-xl);
            margin-top: var(--spacing-xl);
            margin-bottom: var(--spacing-sm);
            color: var(--color-text);
        }
        .article-content h4 {
            font-size: var(--font-size-lg);
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            color: var(--color-text);
        }
        .article-content ul, .article-content ol {
            margin-bottom: var(--spacing-lg);
            padding-left: 1.5em;
        }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: var(--spacing-xs); }
        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-primary-lighter);
            padding: var(--spacing-lg) var(--spacing-xl);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: var(--spacing-xl) 0;
            color: var(--color-text);
            font-style: italic;
        }
        .article-content blockquote p:last-child { margin-bottom: 0; }
        .article-content code {
            background: var(--color-border-light);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            font-size: 0.9em;
            font-family: 'JetBrains Mono', monospace;
        }
        .article-content pre {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
            padding: var(--spacing-lg);
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: var(--spacing-xl) 0;
            font-size: var(--font-size-sm);
            line-height: 1.6;
        }
        .article-content pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--spacing-xl) auto;
            box-shadow: var(--shadow-sm);
        }
        .article-content a { text-decoration: underline; text-underline-offset: 2px; }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: var(--spacing-xl) 0;
            font-size: var(--font-size-sm);
        }
        .article-content th, .article-content td {
            padding: var(--spacing-sm) var(--spacing-md);
            border: 1px solid var(--color-border);
            text-align: left;
        }
        .article-content th {
            background: var(--color-bg-section);
            font-weight: 600;
        }
        .article-content tr:nth-child(even) { background: var(--color-bg-section); }

        /* Tags */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-2xl);
            padding-top: var(--spacing-xl);
            border-top: 1px solid var(--color-border);
        }
        .article-tags .tag {
            padding: 6px 16px;
            font-size: var(--font-size-xs);
            font-weight: 500;
            border-radius: var(--radius-full);
            background: var(--color-bg-section);
            color: var(--color-text-light);
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--color-primary-lighter); color: var(--color-primary); }

        /* Not Found */
        .article-not-found {
            text-align: center;
            padding: var(--spacing-4xl) 0;
            max-width: 600px;
            margin: 0 auto;
        }
        .article-not-found i { font-size: 4rem; color: var(--color-text-lighter); margin-bottom: var(--spacing-lg); }
        .article-not-found h2 { font-size: var(--font-size-3xl); margin-bottom: var(--spacing-md); }
        .article-not-found p { color: var(--color-text-light); margin-bottom: var(--spacing-xl); }

        @media (max-width: 768px) {
            .article-section { padding: var(--spacing-xl) 0; }
            .article-content h2 { font-size: var(--font-size-xl); }
            .article-content h3 { font-size: var(--font-size-lg); }
            .article-content { font-size: var(--font-size-sm); }
            .article-not-found { padding: var(--spacing-2xl) 0; }
            .article-not-found h2 { font-size: var(--font-size-2xl); }
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: var(--spacing-4xl) 0;
            background: var(--color-bg-section);
        }
        .faq-section .section-title {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
        }
        .faq-section .section-title h2 {
            font-size: var(--font-size-3xl);
            margin-bottom: var(--spacing-sm);
        }
        .faq-section .section-title p {
            color: var(--color-text-light);
            font-size: var(--font-size-lg);
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: var(--font-size-base);
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            gap: var(--spacing-md);
        }
        .faq-question i { color: var(--color-primary); transition: var(--transition); font-size: 1.1em; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--color-text-light);
            font-size: var(--font-size-sm);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding-top: var(--spacing-md);
        }
        @media (max-width: 768px) {
            .faq-section { padding: var(--spacing-2xl) 0; }
            .faq-section .section-title h2 { font-size: var(--font-size-2xl); }
            .faq-item { padding: var(--spacing-md) var(--spacing-lg); }
            .faq-question { font-size: var(--font-size-sm); }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: var(--spacing-4xl) 0;
            background: var(--color-bg-dark);
            background-image: linear-gradient(135deg, rgba(15,23,42,0.95), rgba(30,27,75,0.9)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: var(--color-text-inverse);
            text-align: center;
        }
        .cta-section h2 {
            font-size: var(--font-size-3xl);
            color: var(--color-text-inverse);
            margin-bottom: var(--spacing-md);
        }
        .cta-section p {
            font-size: var(--font-size-lg);
            color: rgba(255,255,255,0.7);
            max-width: 600px;
            margin: 0 auto var(--spacing-xl);
        }
        .cta-section .btn-group { display: flex; gap: var(--spacing-md); justify-content: center; flex-wrap: wrap; }
        .cta-section .btn-primary { background: var(--color-text-inverse); color: var(--color-primary); border-color: transparent; }
        .cta-section .btn-primary:hover { background: var(--color-primary-lighter); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,255,255,0.2); }
        .cta-section .btn-secondary { border-color: rgba(255,255,255,0.4); color: var(--color-text-inverse); }
        .cta-section .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.6); }

        @media (max-width: 768px) {
            .cta-section { padding: var(--spacing-2xl) 0; }
            .cta-section h2 { font-size: var(--font-size-2xl); }
            .cta-section p { font-size: var(--font-size-base); }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-2xl);
        }
        .footer-brand .logo { color: var(--color-text-inverse); margin-bottom: var(--spacing-md); }
        .footer-brand .logo span { -webkit-text-fill-color: var(--color-text-inverse); background: none; }
        .footer-brand .logo i { color: var(--color-primary-light); }
        .footer-brand p { font-size: var(--font-size-sm); line-height: 1.7; color: rgba(255,255,255,0.5); max-width: 360px; }
        .footer-col h4 {
            font-size: var(--font-size-sm);
            font-weight: 700;
            color: var(--color-text-inverse);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: var(--font-size-sm);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--color-primary-light); padding-left: 4px; }
        .footer-social { display: flex; gap: var(--spacing-sm); }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-full);
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            font-size: var(--font-size-base);
            padding: 0;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            padding: 0;
            transform: translateY(-2px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: var(--spacing-xl);
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: var(--font-size-xs);
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.45); }
        .footer-bottom a:hover { color: var(--color-primary-light); }

        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
        }
        @media (max-width: 768px) {
            .site-footer { padding: var(--spacing-2xl) 0 var(--spacing-lg); }
            .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
            .footer-brand p { max-width: 100%; }
            .footer-bottom { flex-direction: column; gap: var(--spacing-sm); text-align: center; }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: var(--color-primary);
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 999;
            border: none;
        }
        .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-top:hover { background: var(--color-primary-dark); transform: translateY(-4px); box-shadow: var(--shadow-xl); }

        /* ===== Section Title Utility ===== */
        .section-title { text-align: center; margin-bottom: var(--spacing-3xl); }
        .section-title h2 { font-size: var(--font-size-3xl); margin-bottom: var(--spacing-sm); position: relative; display: inline-block; }
        .section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); border-radius: 4px; margin: var(--spacing-sm) auto 0; }
        .section-title p { color: var(--color-text-light); font-size: var(--font-size-lg); max-width: 600px; margin: 0 auto; }
        @media (max-width: 768px) {
            .section-title h2 { font-size: var(--font-size-2xl); }
            .section-title p { font-size: var(--font-size-base); }
        }

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

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 520px) {
            .article-hero h1 { font-size: var(--font-size-xl); }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
            .article-meta .divider { display: none; }
            .btn-lg { padding: 14px 24px; font-size: var(--font-size-sm); }
            .cta-section .btn-group { flex-direction: column; align-items: center; }
        }