/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d1b3e;
            --primary-light: #1a2d5e;
            --primary-dark: #070f24;
            --accent: #f5b342;
            --accent-light: #f7c66a;
            --accent-dark: #d9941f;
            --bg-body: #f4f7fb;
            --bg-card: #ffffff;
            --bg-alt: #eef2f7;
            --bg-dark: #0b1124;
            --text-primary: #1a2332;
            --text-secondary: #5a6a7a;
            --text-light: #8a9aaa;
            --text-white: #f0f4f8;
            --border: #dee5ed;
            --border-light: #e8eef4;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 28px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-full: 50px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; background: none; }
        button { cursor: pointer; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.8rem; font-weight: 800; }
        h2 { font-size: 2.2rem; font-weight: 700; }
        h3 { font-size: 1.4rem; font-weight: 600; }
        h4 { font-size: 1.2rem; font-weight: 600; }
        p { margin-bottom: 0.8rem; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: var(--spacing-section) 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 12px auto 0;
        }
        .text-center { text-align: center; }
        .text-accent { color: var(--accent); }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            transition: var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(245, 179, 66, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(245, 179, 66, 0.45);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }
        .btn-primary:active { transform: translateY(-1px); }
        .btn-primary:focus-visible { outline: 3px solid var(--accent-light); outline-offset: 2px; }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(240, 248, 255, 0.5);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: var(--text-white);
            transform: translateY(-3px);
        }
        .btn-outline:active { transform: translateY(-1px); }
        .btn-outline:focus-visible { outline: 3px solid rgba(255,255,255,0.4); outline-offset: 2px; }
        .btn-dark {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-dark:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .btn-sm { padding: 10px 22px; font-size: 0.9rem; }
        .btn-lg { padding: 18px 42px; font-size: 1.1rem; }

        /* ===== 导航 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(13, 27, 62, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(13, 27, 62, 0.98);
            box-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .logo span { color: var(--accent); }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            color: rgba(240, 248, 255, 0.75);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .header-nav a:hover { color: var(--text-white); background: rgba(255,255,255,0.08); }
        .header-nav a.active {
            color: var(--text-white);
            background: rgba(245, 179, 66, 0.18);
            font-weight: 600;
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.10);
            border-radius: var(--radius-full);
            padding: 0 16px;
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
        }
        .search-box:focus-within {
            background: rgba(255,255,255,0.16);
            border-color: var(--accent);
        }
        .search-box input {
            padding: 9px 10px 9px 4px;
            width: 160px;
            background: transparent;
            color: var(--text-white);
            font-size: 0.9rem;
        }
        .search-box input::placeholder { color: rgba(240,248,255,0.45); }
        .search-box i { color: rgba(240,248,255,0.5); font-size: 0.9rem; }
        .btn-header-login {
            padding: 9px 22px;
            border-radius: var(--radius-full);
            background: transparent;
            border: 1.5px solid rgba(255,255,255,0.25);
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .btn-header-login:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-header-cta {
            padding: 9px 24px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245, 179, 66, 0.3);
        }
        .btn-header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(245, 179, 66, 0.4);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-white);
            background: none;
            border: none;
            padding: 6px;
            cursor: pointer;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            filter: brightness(0.55) saturate(1.2);
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 17, 36, 0.82) 0%, rgba(13, 27, 62, 0.70) 60%, rgba(7, 15, 36, 0.85) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
            padding: 60px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 179, 66, 0.18);
            border: 1px solid rgba(245, 179, 66, 0.25);
            padding: 8px 20px;
            border-radius: var(--radius-full);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero-content h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-content h1 span { color: var(--accent); }
        .hero-content p {
            font-size: 1.2rem;
            color: rgba(240, 248, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
            color: var(--text-white);
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(240, 248, 255, 0.6);
            margin-top: 4px;
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            background: rgba(245, 179, 66, 0.10);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(245, 179, 66, 0.18);
            transform: scale(1.05);
        }
        .feature-card h3 { margin-bottom: 10px; }
        .feature-card p { font-size: 0.95rem; margin-bottom: 0; }

        /* ===== 登录方式 ===== */
        .bg-alt { background: var(--bg-alt); }
        .login-methods-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: default;
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .method-card .icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .method-card h4 { margin-bottom: 6px; font-size: 1.05rem; }
        .method-card p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== 分类入口 / 登录指南 ===== */
        .guide-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .guide-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }
        .guide-inner {
            position: relative;
            z-index: 1;
        }
        .guide-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .guide-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .guide-image img { width: 100%; height: 400px; object-fit: cover; border-radius: var(--radius-lg); }
        .guide-text h2 { color: var(--text-white); margin-bottom: 16px; }
        .guide-text h2::after { display: none; }
        .guide-text p { color: rgba(240,248,255,0.7); margin-bottom: 20px; font-size: 1.05rem; }
        .guide-text .btn { margin-top: 8px; }
        .guide-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }
        .guide-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(240,248,255,0.8);
            font-size: 0.95rem;
        }
        .guide-features li i { color: var(--accent); font-size: 0.85rem; }

        /* ===== 最新资讯 CMS ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .news-card .thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .news-card .body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .news-card .meta .tag {
            background: rgba(245, 179, 66, 0.12);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: var(--radius-full);
            font-weight: 600;
        }
        .news-card h3 { font-size: 1.1rem; margin-bottom: 8px; flex: 1; }
        .news-card h3 a { color: var(--text-primary); }
        .news-card h3 a:hover { color: var(--accent-dark); }
        .news-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 1.1rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 2rem; color: var(--border); margin-bottom: 12px; display: block; }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px 28px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 0.9rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(245, 179, 66, 0.3);
        }
        .step-card .icon { font-size: 2rem; color: var(--accent); margin-bottom: 14px; margin-top: 6px; }
        .step-card h4 { margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            transition: var(--transition);
            background: none;
            width: 100%;
            text-align: left;
            border: none;
        }
        .faq-question:hover { color: var(--accent-dark); }
        .faq-question i { color: var(--accent); transition: transform 0.3s; font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-inner { position: relative; z-index: 1; }
        .cta-section h2 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 16px; }
        .cta-section p { color: rgba(240,248,255,0.7); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
        .cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { color: rgba(240,248,255,0.55); font-size: 0.9rem; max-width: 320px; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .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;
            color: rgba(240,248,255,0.5);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(240,248,255,0.5);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(240,248,255,0.35);
        }
        .footer-bottom a { color: rgba(240,248,255,0.35); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .hero-content h1 { font-size: 2.8rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .login-methods-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
            .guide-grid { grid-template-columns: 1fr; }
            .guide-image img { height: 280px; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; --spacing-section: 48px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .hero-content h1 { font-size: 2.2rem; }
            .hero-content p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.6rem; }
            .header-nav, .header-right { display: none; }
            .mobile-toggle { display: block; }
            .header-nav.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(13, 27, 62, 0.98);
                backdrop-filter: blur(14px);
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }
            .header-nav.mobile-open a { padding: 12px 18px; width: 100%; }
            .header-right.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: calc(var(--header-height) + 220px);
                left: 0;
                width: 100%;
                padding: 8px 24px 20px;
                background: rgba(13, 27, 62, 0.98);
                gap: 10px;
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }
            .header-right.mobile-open .search-box { width: 100%; }
            .header-right.mobile-open .search-box input { width: 100%; }
            .header-right.mobile-open .btn-header-login,
            .header-right.mobile-open .btn-header-cta { width: 100%; text-align: center; }
            .features-grid { grid-template-columns: 1fr; }
            .login-methods-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .guide-features { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title { margin-bottom: 32px; }
            .container { padding: 0 16px; }
        }
        @media (max-width: 520px) {
            .hero-content h1 { font-size: 1.8rem; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .login-methods-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .steps-grid { grid-template-columns: 1fr; }
            .method-card { padding: 20px 14px; }
            .feature-card { padding: 24px 20px; }
            .news-card .thumb { height: 160px; }
            .guide-image img { height: 200px; }
            .cta-section h2 { font-size: 1.8rem; }
        }

        /* ===== 工具 ===== */
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --secondary-light: #1e293b;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 6px;
            --radius-lg: 16px;
            --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 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;
            padding-top: var(--header-h);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--secondary);
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo:hover { color: var(--secondary); }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(37,99,235,0.25);
        }
        .logo span { color: var(--primary); }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .header-nav a {
            position: relative;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none;
        }
        .header-nav a:hover { color: var(--primary); background: var(--primary-bg); }
        .header-nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 0 14px;
            height: 40px;
            transition: all var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.10);
            background: #fff;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0 8px;
            font-size: 0.88rem;
            color: var(--text);
            outline: none;
            min-width: 0;
        }
        .search-box input::placeholder { color: var(--text-light); }
        .search-box button {
            color: var(--text-light);
            font-size: 0.95rem;
            transition: color var(--transition);
            padding: 4px;
        }
        .search-box button:hover { color: var(--primary); }
        .btn-login {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 22px;
            font-size: 0.88rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 24px;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(37,99,235,0.20);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-login:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37,99,235,0.30);
            color: #fff;
        }
        .btn-login i { font-size: 0.85rem; }

        /* ===== Mobile Menu Toggle ===== */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: rgba(255,255,255,0.7);
            transition: color var(--transition);
        }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb span { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            max-width: 800px;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .article-meta-banner {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }
        .article-meta-banner .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-banner i { font-size: 0.85rem; }
        .article-category-badge {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 20px;
            background: rgba(255,255,255,0.15);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 60px;
            background: var(--bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content h2 {
            font-size: 1.6rem;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--secondary);
        }
        .article-content h3 {
            font-size: 1.25rem;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--secondary);
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 6px;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 6px;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-md);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 14px 22px;
            margin: 20px 0;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content code {
            background: var(--bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            border: 1px solid var(--border);
        }
        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-content pre code {
            background: transparent;
            border: none;
            color: inherit;
            padding: 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.95rem;
        }
        .article-content th, .article-content td {
            padding: 10px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }
        .article-content th {
            background: var(--bg-alt);
            font-weight: 600;
            color: var(--secondary);
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 26px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-bg);
            color: var(--secondary);
        }
        .sidebar-card h3 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-list a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .sidebar-list a .num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-alt);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-light);
            flex-shrink: 0;
        }
        .sidebar-list a:hover .num {
            background: var(--primary);
            color: #fff;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-tags a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            text-align: center;
            padding: 28px 24px;
            border: none;
        }
        .sidebar-cta h3 {
            color: #fff;
            border-bottom: none;
            font-size: 1.15rem;
        }
        .sidebar-cta p {
            font-size: 0.9rem;
            opacity: 0.9;
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .sidebar-cta .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            border-radius: 24px;
            font-size: 0.88rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-cta .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
        }

        /* ===== Article Nav (prev/next) ===== */
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition);
            text-decoration: none;
            max-width: 45%;
        }
        .article-nav a:hover { color: var(--primary); }
        .article-nav a i { font-size: 0.85rem; }
        .article-nav .next { text-align: right; flex-direction: row-reverse; }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 50px 0;
            background: var(--bg-alt);
        }
        .related-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 28px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            text-decoration: none;
            display: block;
            color: inherit;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            color: inherit;
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 18px 20px 20px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 50px 0 60px;
            background: var(--bg);
        }
        .faq-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 32px;
        }
        .faq-grid {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.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: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.75);
            max-width: 580px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-buttons .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: #fff;
            color: var(--secondary);
            font-weight: 700;
            border-radius: 30px;
            font-size: 1rem;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
        }
        .cta-buttons .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.25);
            color: var(--secondary);
        }
        .cta-buttons .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            border-radius: 30px;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.25);
            transition: all var(--transition);
            text-decoration: none;
        }
        .cta-buttons .btn-cta-secondary:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.5);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo span { color: var(--primary-light); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 360px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .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-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
            padding: 4px 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.4);
            text-decoration: none;
        }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .not-found-box h2 {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 24px;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            body { padding-top: 64px; }
            :root { --header-h: 64px; }
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                gap: 2px;
            }
            .header-nav.open { display: flex; }
            .header-nav a { padding: 12px 16px; font-size: 1rem; }
            .header-nav a.active::after { display: none; }
            .menu-toggle { display: flex; }
            .search-box { min-width: 120px; }
            .search-box input { width: 80px; }
            .btn-login { padding: 8px 16px; font-size: 0.82rem; }
            .header-actions .btn-login span { display: none; }
            .article-banner { padding: 40px 0 36px; min-height: 180px; }
            .article-banner h1 { font-size: 1.5rem; }
            .article-content { padding: 24px 20px; font-size: 0.98rem; }
            .article-meta-banner { font-size: 0.82rem; gap: 12px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .related-card img { height: 160px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-buttons .btn-cta-primary,
            .cta-buttons .btn-cta-secondary { padding: 12px 24px; font-size: 0.92rem; }
            .faq-question { font-size: 0.92rem; padding: 14px 16px; }
            .faq-answer { padding: 0 16px 14px; font-size: 0.88rem; }
            .article-nav { flex-direction: column; align-items: flex-start; gap: 12px; }
            .article-nav a { max-width: 100%; }
            .article-nav .next { align-self: flex-end; }
            .logo { font-size: 1.25rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.25rem; }
            .article-content { padding: 18px 14px; font-size: 0.92rem; }
            .header-inner { padding: 0 16px; gap: 8px; }
            .search-box { min-width: 90px; }
            .search-box input { width: 60px; font-size: 0.8rem; }
            .btn-login { padding: 6px 12px; font-size: 0.78rem; }
            .article-meta-banner .meta-item { font-size: 0.78rem; }
            .sidebar-card { padding: 18px 16px; }
            .cta-section { padding: 40px 0; }
            .cta-section h2 { font-size: 1.2rem; }
            .cta-section p { font-size: 0.9rem; }
            .faq-question { font-size: 0.88rem; padding: 12px 14px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e3a5f;
            --primary-dark: #0f2640;
            --primary-light: #2a4f7a;
            --accent: #f0a500;
            --accent-hover: #d49400;
            --accent-light: #fff3d6;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-alt: #eef1f5;
            --text-primary: #1a1a2e;
            --text-secondary: #4b5563;
            --text-muted: #9ca3af;
            --text-white: #ffffff;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);
            --transition: 0.25s ease;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            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;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(1.8rem, 5vw, 3rem);
        }
        h2 {
            font-size: clamp(1.4rem, 3.5vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2.5vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 0.75rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            height: var(--nav-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: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1.1rem;
        }
        .logo span {
            color: var(--accent);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .header-nav a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .header-nav a.active {
            color: var(--text-white);
            background: var(--primary);
        }
        .header-nav a.active::after {
            display: none;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 50px;
            padding: 0 14px;
            height: 40px;
            border: 1px solid transparent;
            transition: all var(--transition);
            min-width: 180px;
        }
        .header-search:focus-within {
            border-color: var(--accent);
            background: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(240, 165, 0, 0.15);
        }
        .header-search input {
            background: none;
            border: none;
            outline: none;
            padding: 8px 0;
            width: 100%;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search button {
            color: var(--text-muted);
            font-size: 0.95rem;
            padding: 0 0 0 8px;
            transition: color var(--transition);
        }
        .header-search button:hover {
            color: var(--primary);
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--primary);
            color: var(--text-white);
            transition: all var(--transition);
            border: none;
            white-space: nowrap;
        }
        .btn-login i {
            font-size: 0.85rem;
        }
        .btn-login:hover {
            background: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-login:active {
            transform: translateY(0);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            background: none;
            border: none;
        }
        .mobile-toggle:hover {
            background: var(--bg-alt);
        }
        @media (max-width: 820px) {
            .header-search {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .header-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                z-index: 99;
                gap: 4px;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .btn-login span {
                display: none;
            }
        }
        @media (max-width: 480px) {
            .logo {
                font-size: 1.25rem;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
            .btn-login {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

        /* ===== Hero 分类页横幅 ===== */
        .category-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0 70px;
            position: relative;
            color: var(--text-white);
            text-align: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(30, 58, 95, 0.75);
            backdrop-filter: blur(2px);
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            color: var(--text-white);
            font-size: clamp(2rem, 5vw, 3.2rem);
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .category-hero h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .hero-tags .tag {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: all var(--transition);
        }
        .hero-tags .tag:hover {
            background: rgba(255, 255, 255, 0.30);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 60px 0 50px;
            }
            .category-hero p {
                font-size: 1rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--accent);
            margin-right: 8px;
        }
        .section-header p {
            max-width: 580px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1.05rem;
        }
        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 14px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 登录方式卡片网格 ===== */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .login-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 20px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .login-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .login-card .card-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: var(--accent-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .login-card:hover .card-icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }
        .login-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .login-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .login-card .card-img {
            width: 100%;
            height: 100px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }
        .login-card .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
            transition: all var(--transition);
        }
        .login-card .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px 24px;
            text-align: center;
            position: relative;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(30, 58, 95, 0.25);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            margin-top: 6px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 安全提示 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .safety-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--bg-card);
            padding: 24px 20px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .safety-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .safety-item .safety-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: var(--accent-light);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent);
        }
        .safety-item h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .safety-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 900px) {
            .safety-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .safety-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 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-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 4vw, 2.4rem);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 30px;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--accent);
            color: var(--primary-dark);
            transition: all var(--transition);
            border: none;
        }
        .btn-cta-primary:hover {
            background: var(--accent-hover);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(240, 165, 0, 0.35);
        }
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
        }
        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        /* ===== 页脚 (沿用首页) ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }
        .site-footer .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .logo span {
            color: var(--accent);
        }
        .site-footer .logo .logo-icon {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            max-width: 340px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 700;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        /* ===== 回到顶部 ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 46px;
            height: 46px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-lg);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: all var(--transition);
            z-index: 50;
            border: none;
        }
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .back-to-top:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .header-actions .btn-login span {
                display: none;
            }
            .header-actions .btn-login {
                padding: 8px 14px;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }