/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a3e;
            --primary-light: #2d2a5e;
            --secondary: #6c63ff;
            --secondary-light: #8b83ff;
            --accent: #f0a500;
            --accent-light: #ffc24a;
            --bg-dark: #0b0b1a;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-section-alt: #0f0f24;
            --text-primary: #f0f0f8;
            --text-secondary: #b0b0cc;
            --text-muted: #7a7a9a;
            --border-color: rgba(108, 99, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --spacer: 80px;
            --container-w: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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-primary);
            background: var(--bg-dark);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
        }
        h3 {
            font-size: clamp(1.3rem, 2.5vw, 1.8rem);
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

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

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacer) 0;
            position: relative;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 16px auto 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(108, 99, 255, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--secondary);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: #1a1a2e;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(240, 165, 0, 0.3);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .btn:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 3px;
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(108, 99, 255, 0.15);
            color: var(--secondary-light);
            border: 1px solid rgba(108, 99, 255, 0.2);
        }
        .badge-accent {
            background: rgba(240, 165, 0, 0.15);
            color: var(--accent-light);
            border-color: rgba(240, 165, 0, 0.2);
        }
        .badge-success {
            background: rgba(72, 187, 120, 0.15);
            color: #68d391;
            border-color: rgba(72, 187, 120, 0.2);
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 11, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(11, 11, 26, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--accent), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            transition: var(--transition);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav a:hover {
            color: var(--text-primary);
        }
        .nav a:hover::after {
            width: 100%;
        }
        .nav a.active {
            color: var(--text-primary);
        }
        .nav a.active::after {
            width: 100%;
            background: var(--accent);
        }
        .nav .nav-cta {
            padding: 10px 24px;
            border-radius: 50px;
            background: var(--secondary);
            color: #fff !important;
            font-weight: 600;
        }
        .nav .nav-cta::after {
            display: none;
        }
        .nav .nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 99, 255, 0.3);
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            overflow: hidden;
            padding-top: 70px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.08);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 99, 255, 0.12), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(240, 165, 0, 0.06), transparent 60%),
                linear-gradient(180deg, rgba(11, 11, 26, 0.4) 0%, rgba(11, 11, 26, 0.9) 100%);
            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: 40px;
        }
        .hero-content h1 {
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            max-width: 520px;
            margin-bottom: 32px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat h3 {
            font-size: 2rem;
            color: var(--accent);
        }
        .hero-stat p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-visual-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            backdrop-filter: blur(12px);
            max-width: 420px;
            width: 100%;
            box-shadow: var(--shadow-soft);
        }
        .hero-visual-card .card-icon {
            font-size: 2.8rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .hero-visual-card h4 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .hero-visual-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .hero-wave {
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            z-index: 2;
            pointer-events: none;
        }
        .hero-wave svg {
            display: block;
            width: 100%;
            height: auto;
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(108, 99, 255, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin: -28px -24px 20px -24px;
        }
        .card-img img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-icon-lg {
            font-size: 2.4rem;
            color: var(--secondary-light);
            margin-bottom: 16px;
        }
        .card h3,
        .card h4 {
            margin-bottom: 10px;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card .card-tag {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .card .card-footer a {
            color: var(--secondary-light);
            font-weight: 500;
        }
        .card .card-footer a:hover {
            color: var(--accent);
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== 分类入口板块 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
            border-color: rgba(108, 99, 255, 0.3);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            transition: transform 0.6s ease;
        }
        .category-card:hover img {
            transform: scale(1.06);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 11, 26, 0.9) 0%, rgba(11, 11, 26, 0.2) 60%, transparent 100%);
            z-index: 1;
        }
        .category-card .cat-body {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            width: 100%;
        }
        .category-card .cat-body h3 {
            font-size: 1.3rem;
            margin-bottom: 6px;
        }
        .category-card .cat-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .category-card .cat-body .badge {
            font-size: 0.75rem;
        }

        /* ===== 内容列表（CMS） ===== */
        .post-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
        }
        .post-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(108, 99, 255, 0.2);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .post-card .post-meta .badge {
            font-size: 0.7rem;
            padding: 2px 10px;
        }
        .post-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card h3 a {
            color: var(--text-primary);
        }
        .post-card h3 a:hover {
            color: var(--secondary-light);
        }
        .post-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1.1rem;
        }
        .post-empty i {
            font-size: 3rem;
            color: var(--border-color);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--secondary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 700;
            border: 3px solid var(--bg-dark);
        }
        .step-card .step-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 数据/统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: var(--bg-card-hover);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 99, 255, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--secondary-light);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(108, 99, 255, 0.08), rgba(240, 165, 0, 0.05));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(108, 99, 255, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            margin-bottom: 16px;
        }
        .cta-section p {
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            margin: 4px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-section-alt);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 图片装饰 ===== */
        .img-frame {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .img-frame:hover {
            border-color: rgba(108, 99, 255, 0.3);
            box-shadow: var(--shadow-glow);
        }
        .img-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content p {
                margin: 0 auto 32px;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-visual-card {
                max-width: 100%;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacer: 56px;
            }
            .nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 32px;
                gap: 18px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                font-size: 1.05rem;
            }
            .nav .nav-cta {
                width: 100%;
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
            .grid-2,
            .grid-3,
            .post-list {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
                align-items: center;
            }
            .hero-stat {
                text-align: center;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-title p {
                font-size: 1rem;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stat h3 {
                font-size: 1.6rem;
            }
            .card {
                padding: 20px 16px;
            }
            .cta-section {
                padding: 32px 16px;
            }
            .cta-section .btn {
                width: 100%;
            }
        }

        /* ===== 实用辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .w-full {
            width: 100%;
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4068;
            --primary-dark: #0f1a30;
            --accent: #f0b90b;
            --accent-hover: #d4a309;
            --accent-light: #fde48a;
            --bg-body: #f8f7f4;
            --bg-card: #ffffff;
            --bg-soft: #eef1f5;
            --bg-dark: #0f1a30;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a5a;
            --text-weak: #7a7a8a;
            --text-light: #f0f0f5;
            --border: #e0e2e8;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

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

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(26, 42, 74, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(240, 185, 11, 0.15);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
            transition: background var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
            transform: rotate(-8deg);
            filter: drop-shadow(0 0 6px rgba(240, 185, 11, 0.4));
        }
        .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            color: rgba(255, 255, 255, 0.75);
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav a.active {
            color: #fff;
            background: rgba(240, 185, 11, 0.18);
            box-shadow: inset 0 -2px 0 var(--accent);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }
        .nav .nav-cta {
            background: var(--accent);
            color: var(--primary-dark) !important;
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 14px rgba(240, 185, 11, 0.35);
        }
        .nav .nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(240, 185, 11, 0.45);
        }
        .nav .nav-cta i {
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 26px;
            padding: 6px 8px;
            cursor: pointer;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 820px) {
            .nav-toggle {
                display: block;
            }
            .nav {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(15, 26, 48, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 2px solid rgba(240, 185, 11, 0.12);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                padding: 14px 18px;
                font-size: 17px;
                border-radius: var(--radius-xs);
                color: rgba(255, 255, 255, 0.8);
            }
            .nav a.active {
                background: rgba(240, 185, 11, 0.15);
                color: var(--accent-light);
            }
            .nav a.active::after {
                display: none;
            }
            .nav .nav-cta {
                justify-content: center;
                margin-top: 10px;
                background: var(--accent);
                color: var(--primary-dark) !important;
            }
        }
        @media (max-width: 520px) {
            .logo span {
                font-size: 18px;
            }
            .logo i {
                font-size: 22px;
            }
            .header .container {
                padding: 0 12px;
            }
        }

        /* ===== Hero / 页面横幅 ===== */
        .page-hero {
            padding: 140px 0 70px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 48, 0.88) 40%, rgba(26, 42, 74, 0.72) 100%);
            z-index: 1;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg-body);
            -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 80'%3E%3Cpath d='M0,80 L0,0 Q300,80 600,40 Q900,0 1200,40 L1200,80 Z' fill='%23f8f7f4'/%3E%3C/svg%3E");
            mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 80'%3E%3Cpath d='M0,80 L0,0 Q300,80 600,40 Q900,0 1200,40 L1200,80 Z' fill='%23f8f7f4'/%3E%3C/svg%3E");
            -webkit-mask-size: cover;
            mask-size: cover;
            z-index: 2;
        }
        .page-hero .container {
            position: relative;
            z-index: 3;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 18px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 10px;
            line-height: 1.8;
        }
        .page-hero .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 20px;
        }
        .page-hero .breadcrumb a {
            color: var(--accent-light);
        }
        .page-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-hero .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 120px 0 50px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 15px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 70px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 17px;
            max-width: 600px;
            margin: 14px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--accent-light);
        }
        .step-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            box-shadow: 0 4px 12px rgba(26, 42, 74, 0.2);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .step-card .step-icon {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 12px;
            background: var(--bg-soft);
            width: 64px;
            height: 64px;
            line-height: 64px;
            border-radius: 50%;
            margin-left: auto;
            margin-right: auto;
            transition: all var(--transition);
        }
        .step-card:hover .step-icon {
            background: var(--accent);
            color: var(--primary-dark);
            transform: scale(1.05);
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 24px 18px;
            }
        }

        /* ===== 图文教程卡片 ===== */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .tutorial-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tutorial-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-light);
        }
        .tutorial-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .tutorial-card:hover .card-img {
            transform: scale(1.04);
        }
        .tutorial-card .card-body {
            padding: 24px 22px 26px;
        }
        .tutorial-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-soft);
            color: var(--primary-light);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 12px;
            transition: all var(--transition);
        }
        .tutorial-card:hover .card-tag {
            background: var(--accent-light);
            color: var(--primary-dark);
        }
        .tutorial-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .tutorial-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .tutorial-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-weight: 500;
            color: var(--primary-light);
            font-size: 15px;
            transition: all var(--transition);
        }
        .tutorial-card .card-link i {
            font-size: 14px;
            transition: transform var(--transition);
        }
        .tutorial-card:hover .card-link {
            color: var(--accent-hover);
        }
        .tutorial-card:hover .card-link i {
            transform: translateX(4px);
        }
        @media (max-width: 1024px) {
            .tutorial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 620px) {
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .tutorial-card .card-img {
                height: 180px;
            }
        }

        /* ===== 技巧列表 ===== */
        .tips-section {
            background: var(--bg-soft);
        }
        .tips-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tip-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 22px 24px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tip-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--accent-light);
            transform: translateX(4px);
        }
        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .tip-item .tip-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .tip-item .tip-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .tips-list {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .tip-item {
                flex-direction: column;
                padding: 18px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--accent-light);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background var(--transition);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }
        .faq-question:hover {
            background: rgba(240, 185, 11, 0.04);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .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;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 520px) {
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 48, 0.85), rgba(26, 42, 74, 0.75));
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 70px 24px;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 30px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 42px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 18px;
            font-weight: 700;
            border-radius: 40px;
            box-shadow: 0 8px 30px rgba(240, 185, 11, 0.4);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(240, 185, 11, 0.55);
        }
        .cta-btn i {
            font-size: 18px;
        }
        @media (max-width: 768px) {
            .cta-section .container {
                padding: 50px 16px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .cta-btn {
                padding: 14px 32px;
                font-size: 16px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer .logo {
            margin-bottom: 14px;
        }
        .footer .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            margin-right: 8px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 15px;
            padding: 6px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 920px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }

        /* ===== 淡入动画 ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #0f1729;
        --primary-light: #1a2a4a;
        --primary-dark: #070e1a;
        --accent: #f0b90b;
        --accent-hover: #d4a00a;
        --accent-glow: rgba(240, 185, 11, 0.25);
        --bg: #f8fafc;
        --bg-alt: #eef2f7;
        --bg-card: #ffffff;
        --bg-dark: #0a1120;
        --text: #1e293b;
        --text-light: #64748b;
        --text-muted: #94a3b8;
        --text-white: #f1f5f9;
        --border: #e2e8f0;
        --border-light: #f1f5f9;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
        --shadow: 0 4px 20px rgba(0,0,0,0.08);
        --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
        --shadow-glow: 0 0 30px rgba(240, 185, 11, 0.15);
        --radius: 14px;
        --radius-sm: 8px;
        --radius-xs: 6px;
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent-hover); }
    a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
    button { cursor: pointer; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary-dark); font-weight: 700; }
    h1 { font-size: 2.4rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    h4 { font-size: 1.15rem; }
    p { margin-bottom: 1rem; color: var(--text); }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header & Navigation ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-h);
        background: rgba(15, 23, 41, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255,255,255,0.06);
        transition: background var(--transition), box-shadow var(--transition);
    }
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.3rem;
        font-weight: 700;
        color: var(--text-white);
        text-decoration: none;
        letter-spacing: -0.3px;
    }
    .logo i { color: var(--accent); font-size: 1.5rem; }
    .logo span { background: linear-gradient(135deg, #f1f5f9, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .logo:hover { opacity: 0.9; }
    .nav { display: flex; align-items: center; gap: 6px; }
    .nav a {
        position: relative;
        padding: 8px 18px;
        color: rgba(255,255,255,0.75);
        font-size: 0.95rem;
        font-weight: 500;
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        text-decoration: none;
    }
    .nav a::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%) scaleX(0);
        width: 60%;
        height: 2px;
        background: var(--accent);
        border-radius: 2px;
        transition: transform var(--transition);
    }
    .nav a:hover { color: var(--text-white); background: rgba(255,255,255,0.06); }
    .nav a:hover::after { transform: translateX(-50%) scaleX(1); }
    .nav a.active { color: var(--text-white); background: rgba(240,185,11,0.12); }
    .nav a.active::after { transform: translateX(-50%) scaleX(1); }
    .nav a.nav-cta {
        background: linear-gradient(135deg, var(--accent), #d4a00a);
        color: var(--primary-dark);
        font-weight: 600;
        padding: 8px 22px;
        border-radius: 50px;
        box-shadow: 0 4px 15px rgba(240,185,11,0.3);
        margin-left: 8px;
    }
    .nav a.nav-cta::after { display: none; }
    .nav a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(240,185,11,0.4); background: linear-gradient(135deg, #f5c51e, #d4a00a); color: var(--primary-dark); }
    .nav a.nav-cta i { margin-right: 6px; }
    .nav-toggle { display: none; font-size: 1.4rem; color: var(--text-white); padding: 6px 10px; border-radius: var(--radius-xs); background: rgba(255,255,255,0.06); }

    /* ===== Article Banner ===== */
    .article-banner {
        padding: 120px 0 60px;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 70%, #0f1729 100%);
        position: relative;
        overflow: hidden;
        min-height: 320px;
        display: flex;
        align-items: center;
    }
    .article-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.12;
        mix-blend-mode: overlay;
    }
    .article-banner::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 120px;
        background: linear-gradient(to top, var(--bg), transparent);
    }
    .article-banner .container { position: relative; z-index: 2; text-align: center; }
    .article-banner .breadcrumb {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.5);
        margin-bottom: 20px;
    }
    .article-banner .breadcrumb a { color: rgba(255,255,255,0.6); text-decoration: none; }
    .article-banner .breadcrumb a:hover { color: var(--accent); }
    .article-banner .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.3); }
    .article-banner h1 {
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--text-white);
        max-width: 860px;
        margin: 0 auto 16px;
        letter-spacing: -0.5px;
        line-height: 1.25;
        text-shadow: 0 2px 20px rgba(0,0,0,0.3);
    }
    .article-banner .meta {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 16px 28px;
        color: rgba(255,255,255,0.6);
        font-size: 0.9rem;
    }
    .article-banner .meta span { display: flex; align-items: center; gap: 6px; }
    .article-banner .meta i { color: var(--accent); font-size: 0.85rem; }
    .article-banner .meta .category {
        background: rgba(240,185,11,0.15);
        color: var(--accent);
        padding: 2px 14px;
        border-radius: 50px;
        font-size: 0.8rem;
        font-weight: 600;
    }

    /* ===== Article Content ===== */
    .article-section { padding: 60px 0 20px; }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 48px;
        align-items: start;
    }
    .article-body {
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 40px 44px;
        border: 1px solid var(--border);
    }
    .article-body .cover-wrap {
        margin: -40px -44px 32px;
        border-radius: var(--radius) var(--radius) 0 0;
        overflow: hidden;
        max-height: 420px;
    }
    .article-body .cover-wrap img { width: 100%; height: auto; object-fit: cover; border-radius: 0; }
    .article-body .content { font-size: 1.05rem; line-height: 1.85; color: var(--text); }
    .article-body .content p { margin-bottom: 1.2rem; }
    .article-body .content h2 { font-size: 1.5rem; margin: 2rem 0 1rem; padding-bottom: 8px; border-bottom: 2px solid var(--border-light); }
    .article-body .content h3 { font-size: 1.2rem; margin: 1.6rem 0 0.8rem; }
    .article-body .content ul, .article-body .content ol { margin: 1rem 0 1.2rem 1.5rem; list-style: disc; }
    .article-body .content li { margin-bottom: 0.4rem; }
    .article-body .content blockquote {
        border-left: 4px solid var(--accent);
        background: var(--bg-alt);
        padding: 16px 20px;
        margin: 1.4rem 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-body .content img { border-radius: var(--radius-sm); margin: 1.4rem 0; box-shadow: var(--shadow-sm); }
    .article-body .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 36px;
        padding-top: 28px;
        border-top: 1px solid var(--border);
    }
    .article-body .tag-list .tag {
        background: var(--bg-alt);
        color: var(--text-light);
        padding: 4px 16px;
        border-radius: 50px;
        font-size: 0.8rem;
        font-weight: 500;
        transition: all var(--transition);
    }
    .article-body .tag-list .tag:hover { background: var(--accent); color: var(--primary-dark); }

    /* ===== Sidebar ===== */
    .article-sidebar { display: flex; flex-direction: column; gap: 28px; }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow-sm);
        padding: 24px 22px;
        border: 1px solid var(--border);
    }
    .sidebar-card h4 {
        font-size: 1rem;
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--primary);
    }
    .sidebar-card h4 i { color: var(--accent); }
    .sidebar-card ul { display: flex; flex-direction: column; gap: 10px; }
    .sidebar-card ul li a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 8px 12px;
        border-radius: var(--radius-xs);
        background: var(--bg-alt);
        color: var(--text);
        font-size: 0.9rem;
        transition: all var(--transition);
        text-decoration: none;
    }
    .sidebar-card ul li a:hover { background: var(--accent); color: var(--primary-dark); transform: translateX(4px); }
    .sidebar-card ul li a i { color: var(--accent); font-size: 0.8rem; }
    .sidebar-card .side-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: linear-gradient(135deg, var(--accent), #d4a00a);
        color: var(--primary-dark);
        font-weight: 600;
        padding: 10px 24px;
        border-radius: 50px;
        font-size: 0.9rem;
        transition: all var(--transition);
        text-decoration: none;
        margin-top: 8px;
        box-shadow: 0 4px 15px rgba(240,185,11,0.25);
    }
    .sidebar-card .side-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(240,185,11,0.35); }

    /* ===== FAQ ===== */
    .faq-section { padding: 60px 0; background: var(--bg-alt); }
    .faq-section .section-title { text-align: center; margin-bottom: 48px; }
    .faq-section .section-title h2 { font-size: 2rem; color: var(--primary-dark); }
    .faq-section .section-title p { color: var(--text-light); max-width: 500px; margin: 8px auto 0; }
    .faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
    .faq-item {
        background: var(--bg-card);
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: box-shadow var(--transition);
    }
    .faq-item:hover { box-shadow: var(--shadow); }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        color: var(--primary);
        cursor: pointer;
        transition: background var(--transition);
        gap: 12px;
    }
    .faq-question:hover { background: var(--bg-alt); }
    .faq-question i { color: var(--accent); font-size: 0.85rem; transition: transform var(--transition); flex-shrink: 0; }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        max-height: 0;
        padding: 0 24px;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        color: var(--text-light);
        font-size: 0.95rem;
        line-height: 1.7;
    }
    .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

    /* ===== CTA ===== */
    .cta-section {
        padding: 80px 0;
        background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
        position: relative;
        overflow: hidden;
        text-align: center;
    }
    .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: 2.2rem; color: var(--text-white); margin-bottom: 12px; }
    .cta-section p { color: rgba(255,255,255,0.65); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
    .cta-section .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        background: linear-gradient(135deg, var(--accent), #d4a00a);
        color: var(--primary-dark);
        font-weight: 700;
        padding: 16px 40px;
        border-radius: 50px;
        font-size: 1.1rem;
        transition: all var(--transition);
        box-shadow: 0 8px 30px rgba(240,185,11,0.3);
        text-decoration: none;
    }
    .cta-section .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(240,185,11,0.45); }

    /* ===== Latest Posts ===== */
    .latest-section { padding: 60px 0 80px; }
    .latest-section .section-title { text-align: center; margin-bottom: 40px; }
    .latest-section .section-title h2 { font-size: 2rem; color: var(--primary-dark); }
    .latest-section .section-title p { color: var(--text-light); max-width: 480px; margin: 8px auto 0; }
    .posts-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 24px;
    }
    .post-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
    .post-card .card-img {
        height: 180px;
        overflow: hidden;
        position: relative;
    }
    .post-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
    .post-card:hover .card-img img { transform: scale(1.05); }
    .post-card .card-img .card-cat {
        position: absolute;
        top: 12px;
        left: 12px;
        background: rgba(240,185,11,0.9);
        color: var(--primary-dark);
        font-size: 0.75rem;
        font-weight: 600;
        padding: 2px 12px;
        border-radius: 50px;
        backdrop-filter: blur(4px);
    }
    .post-card .card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
    .post-card .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; flex: 1; }
    .post-card .card-body h3 a { color: var(--primary-dark); text-decoration: none; transition: color var(--transition); }
    .post-card .card-body h3 a:hover { color: var(--accent-hover); }
    .post-card .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .post-card .card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 0.8rem;
        color: var(--text-muted);
        border-top: 1px solid var(--border-light);
        padding-top: 12px;
        margin-top: auto;
    }
    .post-card .card-footer span { display: flex; align-items: center; gap: 4px; }
    .post-card .card-footer i { font-size: 0.75rem; }

    /* ===== Not Found ===== */
    .not-found-section { padding: 120px 0 100px; text-align: center; min-height: 50vh; display: flex; align-items: center; }
    .not-found-section .not-found-icon { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
    .not-found-section h2 { font-size: 2rem; color: var(--primary-dark); margin-bottom: 12px; }
    .not-found-section p { color: var(--text-light); max-width: 420px; margin: 0 auto 28px; }
    .not-found-section .back-home {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--primary-light);
        color: var(--text-white);
        padding: 12px 32px;
        border-radius: 50px;
        font-weight: 600;
        transition: all var(--transition);
        text-decoration: none;
    }
    .not-found-section .back-home:hover { background: var(--primary); transform: translateY(-2px); }

    /* ===== Footer ===== */
    .footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.7);
        padding: 60px 0 30px;
    }
    .footer .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer .footer-brand .logo { margin-bottom: 14px; }
    .footer .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 320px; line-height: 1.7; }
    .footer .footer-social { display: flex; gap: 12px; }
    .footer .footer-social a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
        color: rgba(255,255,255,0.6);
        font-size: 1rem;
        transition: all var(--transition);
        text-decoration: none;
    }
    .footer .footer-social a:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); }
    .footer .footer-col h5 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
    .footer .footer-col a {
        display: block;
        color: rgba(255,255,255,0.5);
        font-size: 0.9rem;
        padding: 5px 0;
        transition: all var(--transition);
        text-decoration: none;
    }
    .footer .footer-col a:hover { color: var(--accent); padding-left: 6px; }
    .footer .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 12px;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.4);
    }
    .footer .footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
    .footer .footer-bottom a:hover { color: var(--accent); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .footer .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
        :root { --header-h: 64px; }
        h1 { font-size: 1.8rem; }
        h2 { font-size: 1.5rem; }
        .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(15,23,41,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); gap: 4px; }
        .nav.open { display: flex; }
        .nav a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
        .nav a.nav-cta { margin-left: 0; margin-top: 6px; text-align: center; justify-content: center; }
        .nav-toggle { display: block; }
        .article-banner { padding: 100px 0 40px; min-height: 240px; }
        .article-banner h1 { font-size: 1.6rem; }
        .article-banner .meta { gap: 10px 16px; font-size: 0.8rem; }
        .article-body { padding: 24px 20px; }
        .article-body .cover-wrap { margin: -24px -20px 24px; max-height: 220px; }
        .article-body .content { font-size: 1rem; }
        .article-sidebar { grid-template-columns: 1fr; }
        .cta-section h2 { font-size: 1.6rem; }
        .cta-section .cta-btn { padding: 14px 30px; font-size: 1rem; }
        .posts-grid { grid-template-columns: 1fr; }
        .footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-banner h1 { font-size: 1.35rem; }
        .article-body { padding: 18px 14px; }
        .article-body .cover-wrap { margin: -18px -14px 18px; max-height: 180px; }
        .faq-question { padding: 14px 16px; font-size: 0.95rem; }
        .faq-answer { font-size: 0.9rem; }
    }