/* roulang page: index */
/* ============ 设计变量 ============ */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --primary-alpha: rgba(37, 99, 235, 0.08);
    --accent: #06b6d4;
    --accent-light: #cffafe;
    --accent-alpha: rgba(6, 182, 212, 0.1);
    --bg-body: #f7f9fc;
    --bg-white: #ffffff;
    --bg-dark: #0b1526;
    --bg-dark-2: #111f3df5;
    --text-heading: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --border-light: #e2e8f0;
    --border-mid: #cbd5e1;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.07);
    --shadow-md: 0 8px 28px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
    --shadow-brand: 0 8px 30px rgba(37, 99, 235, 0.25);
    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1240px;
    --header-h: 78px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; }

:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ============ 网格容器 ============ */
.grid-container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-alt { background: var(--bg-white); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-alpha);
    padding: 6px 18px;
    border-radius: 100px;
    margin-bottom: 16px;
}
.section-head h2 {
    font-size: clamp(28px, 3.2vw, 42px);
    line-height: 1.25;
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: -0.5px;
    margin-bottom: 14px;
}
.section-head p { font-size: 17px; color: var(--text-muted); line-height: 1.8; }

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    padding: 14px 32px;
    border-radius: 100px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
    user-select: none;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(30, 64, 175, 0.3);
    color: #fff;
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline:hover { background: var(--primary-alpha); transform: translateY(-2px); color: var(--primary-dark); }
.btn-white {
    background: #fff;
    color: var(--text-heading);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}
.btn-white:hover { background: #f1f5f9; transform: translateY(-2px); color: var(--text-heading); }
.btn-lg { padding: 18px 44px; font-size: 16px; }
.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-block { width: 100%; }

/* ============ 顶部导航 ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-xs);
}
.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.brand-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.brand-text { font-size: 20px; font-weight: 800; color: var(--text-heading); letter-spacing: -0.3px; }
.brand-text span { color: var(--primary); }

.main-nav ul { display: flex; align-items: center; gap: 6px; }
.main-nav .nav-link {
    display: inline-block;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 100px;
    transition: var(--transition);
}
.main-nav .nav-link:hover { color: var(--primary); background: var(--primary-alpha); }
.main-nav .nav-link.active { color: var(--primary); background: var(--primary-alpha); font-weight: 600; }

.header-tools { display: flex; align-items: center; gap: 14px; }
.header-search {
    position: relative;
    width: 220px;
}
.header-search input {
    width: 100%;
    height: 42px;
    border: 1px solid var(--border-light);
    border-radius: 100px;
    padding: 0 42px 0 16px;
    font-size: 14px;
    background: #f8fafc;
    transition: var(--transition);
}
.header-search input:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}
.header-search .search-icon {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
    pointer-events: none;
}
.header-cta {
    padding: 11px 26px;
    font-size: 14px;
    border-radius: 100px;
}
.mobile-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--border-light);
    background: #fff;
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-heading);
    font-size: 18px;
    transition: var(--transition);
}
.mobile-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    padding: 16px 24px 24px;
    animation: slideDown 0.3s ease;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
    display: block;
    padding: 14px 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 10px;
}
.mobile-menu a:hover,
.mobile-menu a.active { background: var(--primary-alpha); color: var(--primary); }
.mobile-menu .header-cta { margin-top: 12px; text-align: center; }
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============ Hero 首屏 ============ */
.hero {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0b1526 0%, #132b63 60%, #1a3a8f 100%);
    overflow: hidden;
    isolation: isolate;
    padding: 80px 0;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    z-index: -2;
}
.hero-pattern {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 25% 15%, rgba(37, 99, 235, 0.25), transparent 50%),
        radial-gradient(circle at 75% 85%, rgba(6, 182, 212, 0.15), transparent 45%);
    z-index: -1;
}
.hero-content { width: 100%; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 28px;
    letter-spacing: 0.5px;
}
.hero-badge i { color: var(--accent); }
.hero h1 {
    font-size: clamp(40px, 6vw, 76px);
    line-height: 1.1;
    font-weight: 900;
    color: #fff;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.hero h1 .highlight {
    background: linear-gradient(90deg, #60a5fa, #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: clamp(16px, 1.6vw, 19px);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    max-width: 620px;
    margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 56px; }
.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    padding-top: 28px;
    max-width: 640px;
}
.hero-stat {
    flex: 1;
    min-width: 120px;
    padding: 0 20px;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-stat:first-child { padding-left: 0; }
.hero-stat:last-child { border-right: none; }
.hero-stat .num {
    display: block;
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
}
.hero-stat .label {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

/* ============ 核心服务 ============ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: var(--transition);
}
.service-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}
.service-card:hover::before { opacity: 1; }
.service-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 24px;
    color: var(--primary);
    background: var(--primary-alpha);
    transition: var(--transition);
}
.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}
.service-card h3 { font-size: 20px; font-weight: 700; color: var(--text-heading); margin-bottom: 12px; }
.service-card p { font-size: 15px; color: var(--text-muted); line-height: 1.75; }

/* ============ 分类入口 ============ */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.category-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 360px;
    display: flex;
    align-items: flex-end;
    background-size: cover;
    background-position: center;
    isolation: isolate;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.category-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11, 21, 38, 0) 40%, rgba(11, 21, 38, 0.88) 100%);
    z-index: 0;
}
.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.category-card-body {
    position: relative;
    z-index: 1;
    padding: 32px 28px;
    width: 100%;
    color: #fff;
}
.category-card-body .cat-icon {
    font-size: 28px;
    margin-bottom: 14px;
    color: var(--accent);
}
.category-card-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.category-card-body p { font-size: 14px; color: rgba(255, 255, 255, 0.75); margin-bottom: 14px; line-height: 1.7; }
.category-card-body .cat-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 4px;
    transition: var(--transition);
}
.category-card-body .cat-link:hover { border-color: var(--accent); color: var(--accent); gap: 10px; }

/* ============ 最新资讯 ============ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.news-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.news-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: transparent;
}
.news-card-body { padding: 26px 26px 22px; flex: 1; display: flex; flex-direction: column; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 100px;
    background: var(--primary-alpha);
    color: var(--primary);
    letter-spacing: 0.3px;
}
.badge-accent { background: var(--accent-alpha); color: #0e7490; }
.news-date { font-size: 13px; color: var(--text-muted); display: inline-flex; align-items: center; gap: 5px; }
.news-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}
.news-card a:hover h3 { color: var(--primary); }
.news-card .news-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card .news-foot {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.news-foot .read-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.news-foot .read-more:hover { gap: 10px; color: var(--primary-dark); }
.news-card.news-empty { text-align: center; padding: 60px 30px; color: var(--text-muted); font-size: 16px; }
.section-more { text-align: center; margin-top: 44px; }

/* ============ 登录流程 ============ */
.process-section { background: linear-gradient(180deg, var(--bg-white), #f1f5f9); }
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: process;
}
.process-item {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}
.process-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.process-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--primary-alpha);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    transition: var(--transition);
}
.process-item:hover .process-icon { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3); }
.process-item h3 { font-size: 18px; font-weight: 700; color: var(--text-heading); margin-bottom: 10px; }
.process-item p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.process-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
}

/* ============ 数据概览 ============ */
.stats-section {
    position: relative;
    padding: 100px 0;
    background: linear-gradient(135deg, #0b1526, #132b63);
    overflow: hidden;
    isolation: isolate;
}
.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
    z-index: -1;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.stat-item {
    text-align: center;
    padding: 36px 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    transition: var(--transition);
}
.stat-item:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); }
.stat-num {
    display: block;
    font-size: clamp(36px, 4vw, 52px);
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 8px;
}
.stat-num i { font-size: 26px; margin-right: 6px; color: var(--accent); }
.stat-label { font-size: 15px; color: rgba(255, 255, 255, 0.65); font-weight: 500; }

/* ============ FAQ ============ */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-mid); box-shadow: var(--shadow-sm); }
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-heading);
    cursor: pointer;
    list-style: none;
    transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--primary-alpha);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 14px;
    transition: var(--transition);
}
.faq-item[open] summary { color: var(--primary); }
.faq-item[open] .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer { padding: 0 28px 24px; font-size: 15px; color: var(--text-muted); line-height: 1.8; }

/* ============ CTA 区块 ============ */
.cta-section {
    position: relative;
    padding: 110px 0;
    background: linear-gradient(135deg, rgba(11, 21, 38, 0.92), rgba(30, 64, 175, 0.88)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    text-align: center;
    isolation: isolate;
    overflow: hidden;
}
.cta-section::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.06), transparent 45%);
    z-index: -1;
    animation: slowPulse 6s ease-in-out infinite;
}
@keyframes slowPulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}
.cta-section h2 {
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 18px;
}
.cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.75);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.8;
}
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ============ 页脚 ============ */
.site-footer {
    background: #0b1526;
    color: rgba(255, 255, 255, 0.6);
    padding: 80px 0 0;
}
.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 50px;
}
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand .brand-icon { background: linear-gradient(135deg, var(--primary), var(--accent)); }
.footer-brand .brand-text { color: #fff; }
.footer-brand .brand-text span { color: #60a5fa; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 300px; margin-bottom: 24px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 22px;
    letter-spacing: 0.5px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 100px;
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}
.footer-links a i { font-size: 12px; opacity: 0.5; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
}
.footer-bottom a { color: rgba(255, 255, 255, 0.5); }
.footer-bottom a:hover { color: #fff; }

/* ============ 响应式断点 ============ */
@media screen and (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
    .header-search { width: 160px; }
}

@media screen and (max-width: 768px) {
    .section { padding: 72px 0; }
    .main-nav, .header-search, .header-cta { display: none; }
    .mobile-toggle { display: flex; }
    .grid-container { padding: 0 20px; }
    .hero { min-height: 520px; padding: 60px 0; }
    .hero-stats { gap: 20px; }
    .hero-stat { border-right: none; padding: 0; }
    .footer-main { grid-template-columns: 1fr; gap: 36px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

@media screen and (max-width: 520px) {
    .services-grid { grid-template-columns: 1fr; }
    .categories-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .hero-actions .btn { width: 100%; }
    .cta-actions .btn { width: 100%; }
}

/* ============ 辅助类 ============ */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-10 { gap: 10px; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #0ea5e9;
            --accent-dark: #0284c7;
            --success: #10b981;
            --success-bg: #ecfdf5;
            --warning: #f59e0b;
            --warning-bg: #fffbeb;
            --danger: #ef4444;
            --danger-bg: #fef2f2;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-soft: #f1f5f9;
            --bg-deep: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
            --shadow: 0 4px 16px rgba(15, 23, 42, .06), 0 2px 6px rgba(15, 23, 42, .04);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, .08), 0 4px 12px rgba(15, 23, 42, .05);
            --shadow-primary: 0 8px 24px rgba(37, 99, 235, .18);
            --transition: all .25s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

        ul,
        ol {
            list-style: none;
        }

        .grid-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 32px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 19px;
            box-shadow: var(--shadow-primary);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            line-height: 1.2;
        }

        .brand-text span {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }

        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .header-search {
            position: relative;
            width: 220px;
        }

        .header-search input {
            width: 100%;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0 16px 0 40px;
            font-size: 14px;
            background: var(--bg-soft);
            color: var(--text);
            outline: none;
            transition: var(--transition);
        }

        .header-search input:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .header-search i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            box-shadow: var(--shadow-primary);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(37, 99, 235, .25);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-bg);
            transform: translateY(-2px);
        }

        .btn-white-outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, .6);
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: #fff;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 90px 0 80px;
            background: linear-gradient(135deg, rgba(15, 23, 42, .92) 0%, rgba(37, 99, 235, .85) 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .85) 0%, rgba(37, 99, 235, .75) 100%);
        }

        .page-hero .grid-container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 48px;
            align-items: center;
        }

        .page-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .14);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 18px;
            border: 1px solid rgba(255, 255, 255, .2);
        }

        .page-hero h1 {
            font-size: 40px;
            line-height: 1.2;
            color: #fff;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .page-hero h1 span {
            color: #60a5fa;
        }

        .page-hero p {
            color: rgba(255, 255, 255, .85);
            font-size: 17px;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 4px solid rgba(255, 255, 255, .15);
            max-height: 320px;
            object-fit: cover;
        }

        .hero-float-card {
            position: absolute;
            bottom: -20px;
            left: 20px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .hero-float-card .icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--success-bg);
            color: var(--success);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
        }

        .hero-float-card .text {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.4;
        }

        .hero-float-card .text strong {
            display: block;
            color: var(--text);
            font-size: 15px;
        }

        /* breadcrumb */
        .breadcrumb-bar {
            padding: 16px 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb-bar .grid-container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-bar a {
            color: var(--text-light);
        }

        .breadcrumb-bar a:hover {
            color: var(--primary);
        }

        .breadcrumb-bar i {
            font-size: 11px;
            color: var(--text-muted);
        }

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

        .section-bg-light {
            background: var(--bg-white);
        }

        .section-bg-soft {
            background: var(--bg-soft);
        }

        .section-head {
            max-width: 680px;
            margin: 0 auto 50px;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .5px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* Login Methods Cards */
        .login-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .login-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 36px 30px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .login-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .login-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .login-card:hover::before {
            opacity: 1;
        }

        .login-card .card-icon {
            width: 66px;
            height: 66px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 18px;
            background: var(--primary-bg);
            color: var(--primary);
        }

        .login-card:nth-child(2) .card-icon {
            background: var(--success-bg);
            color: var(--success);
        }

        .login-card:nth-child(3) .card-icon {
            background: var(--warning-bg);
            color: var(--warning);
        }

        .login-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .login-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            background: var(--bg-soft);
            color: var(--text-light);
            font-weight: 500;
        }

        /* Steps */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            box-shadow: var(--shadow-primary);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }

        /* Content Split */
        .content-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .content-split.reverse .split-image {
            order: 2;
        }

        .content-split.reverse .split-text {
            order: 1;
        }

        .split-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
            min-height: 360px;
        }

        .split-text h3 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 18px;
        }

        .split-text .lead {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 24px;
        }

        .feature-list {
            margin-bottom: 28px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text);
        }

        .feature-list li i {
            color: var(--success);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }

        .feature-list li span {
            line-height: 1.6;
        }

        /* FAQ */
        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow);
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }

        .faq-q:hover {
            color: var(--primary);
        }

        .faq-q i {
            color: var(--text-muted);
            font-size: 14px;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-q i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-a {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .faq-a p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
            margin: 0;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-banner {
            background: linear-gradient(135deg, var(--bg-deep) 0%, #1e3a8a 100%);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-xl);
            padding: 60px 64px;
            position: relative;
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 40px;
            align-items: center;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .9) 0%, rgba(30, 58, 138, .85) 100%);
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-content h3 {
            color: #fff;
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-content p {
            color: rgba(255, 255, 255, .8);
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 0;
        }

        .cta-actions {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: center;
        }

        .cta-actions .btn {
            width: 100%;
            max-width: 300px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            padding: 64px 0 0;
            color: rgba(255, 255, 255, .7);
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .brand {
            margin-bottom: 18px;
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-brand .brand-text span {
            color: #60a5fa;
        }

        .footer-brand .brand-icon {
            background: linear-gradient(135deg, #3b82f6, #0ea5e9);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 20px;
            max-width: 340px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-links a i {
            font-size: 11px;
            color: #60a5fa;
        }

        .footer-bottom {
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, .08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        /* Mobile Navigation */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, .98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 999;
            padding: 24px 20px;
            border-top: 1px solid var(--border-light);
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu .nav-link {
            display: block;
            width: 100%;
            padding: 14px 18px;
            border-radius: var(--radius);
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
        }

        .mobile-menu .nav-link:hover,
        .mobile-menu .nav-link.active {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .mobile-menu .btn {
            margin-top: 16px;
            width: 100%;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .header-search {
                display: none;
            }

            .main-nav ul {
                gap: 2px;
            }

            .main-nav .nav-link {
                padding: 8px 12px;
                font-size: 14px;
            }

            .page-hero {
                padding: 60px 0;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .step-item {
                padding: 24px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .main-nav {
                display: none;
            }

            .header-actions .btn {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .page-hero {
                padding: 48px 0;
            }

            .page-hero .grid-container {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .hero-visual img {
                max-height: 260px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .login-grid {
                grid-template-columns: 1fr;
                max-width: 440px;
                margin: 0 auto;
            }

            .steps-wrap {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .content-split {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .content-split.reverse .split-image {
                order: 0;
            }

            .content-split.reverse .split-text {
                order: 0;
            }

            .cta-banner {
                grid-template-columns: 1fr;
                padding: 40px 28px;
                text-align: center;
            }

            .cta-content p {
                margin-bottom: 16px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .page-hero p {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .steps-wrap {
                grid-template-columns: 1fr;
            }

            .step-item {
                padding: 24px;
            }

            .split-image img {
                min-height: 220px;
            }

            .cta-banner {
                padding: 32px 20px;
                border-radius: var(--radius-lg);
            }

            .cta-content h3 {
                font-size: 22px;
            }

            .hero-float-card {
                bottom: -12px;
                left: 10px;
                padding: 10px 16px;
            }

            .faq-q {
                padding: 18px;
                font-size: 15px;
            }

            .faq-a {
                padding: 0 18px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1e40af;
            --primary-rgb: 30, 64, 175;
            --primary-hover: #1c3aa8;
            --primary-soft: #eff6ff;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --accent-soft: #fef3c7;
            --success: #10b981;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --border: #e2e8f0;
            --text: #0f172a;
            --text-secondary: #475569;
            --muted: #64748b;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --transition: all .25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        a:hover {
            color: var(--primary-hover);
        }

        ul, ol {
            padding: 0;
            margin: 0;
        }

        .grid-container {
            max-width: 1200px;
        }

        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 3px;
            width: 0;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            z-index: 1000;
            border-radius: 0 3px 3px 0;
            transition: width .1s linear;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-xs);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(var(--primary-rgb), .3);
        }

        .brand-text {
            font-size: 21px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            line-height: 1.2;
            white-space: nowrap;
        }

        .brand-text span {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        .main-nav ul {
            display: flex;
            gap: 2px;
            list-style: none;
            margin: 0;
        }

        .main-nav .nav-link {
            display: block;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
        }

        .main-nav .nav-link:hover {
            background: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .main-nav .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(var(--primary-rgb), .28);
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--surface-alt);
            border: 1px solid transparent;
            border-radius: 999px;
            padding: 0 8px 0 16px;
            height: 38px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(var(--primary-rgb), .12);
        }

        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            width: 140px;
            color: var(--text);
        }

        .header-search input::placeholder {
            color: var(--muted);
        }

        .header-search button {
            border: none;
            background: none;
            padding: 6px 8px;
            color: var(--muted);
            cursor: pointer;
            transition: var(--transition);
        }

        .header-search button:hover {
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            border: none;
            background: var(--surface-alt);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            font-size: 16px;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(var(--primary-rgb), .3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(var(--primary-rgb), .4);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
        }

        .btn-light:hover {
            background: var(--primary-soft);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, .3);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: var(--radius-sm);
        }

        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
            border-radius: var(--radius);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(var(--primary-rgb), .4);
            outline-offset: 2px;
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 70px 0 80px;
            background: linear-gradient(135deg, rgba(15, 23, 42, .92) 0%, rgba(30, 64, 175, .85) 60%, rgba(59, 130, 246, .75) 100%), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            color: #fff;
            border-bottom: 4px solid var(--accent);
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(255,255,255,.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .article-hero-inner {
            max-width: 860px;
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255,255,255,.75);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255,255,255,.75);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb i {
            font-size: 11px;
            opacity: .6;
        }

        .article-hero h1 {
            font-size: clamp(1.7rem, 3.5vw, 2.5rem);
            font-weight: 800;
            line-height: 1.35;
            margin: 0 0 22px;
            letter-spacing: -0.5px;
            color: #fff;
            text-shadow: 0 2px 20px rgba(0,0,0,.2);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255,255,255,.85);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta .badge {
            background: var(--accent);
            color: #fff;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(245, 158, 11, .4);
        }

        /* ===== Article Layout ===== */
        .article-layout {
            display: flex;
            gap: 32px;
            padding: 50px 0 40px;
            align-items: flex-start;
        }

        .article-main {
            flex: 1;
            min-width: 0;
        }

        .article-sidebar {
            width: 330px;
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 90px;
        }

        .article-body {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 42px 48px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 28px;
        }

        .article-body h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--text);
            margin: 2.2rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-soft);
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            margin: 1.8rem 0 .9rem;
        }

        .article-body p {
            margin-bottom: 1.25rem;
            line-height: 1.85;
            color: var(--text-secondary);
            font-size: 15.5px;
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 4px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 22px;
            background: var(--primary-soft);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 1.6rem 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body code {
            background: var(--surface-alt);
            padding: 2px 8px;
            border-radius: 5px;
            font-size: 0.9em;
            color: var(--primary);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .article-body table th {
            background: var(--primary-soft);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
            color: var(--text);
        }

        .article-body table td {
            padding: 12px 16px;
            border-top: 1px solid var(--border);
            color: var(--text-secondary);
        }

        /* ===== Share / Tags ===== */
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 20px 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-share .share-label {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            margin-right: 4px;
        }

        .share-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }

        .share-btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .share-btn.wechat {
            background: #07c160;
        }

        .share-btn.weibo {
            background: #e6162d;
        }

        .share-btn.twitter {
            background: #1da1f2;
        }

        .share-btn.copy {
            background: var(--primary);
        }

        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .article-tags .tag-label {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 70px 30px;
        }

        .empty-state i {
            font-size: 48px;
            color: var(--muted);
            margin-bottom: 18px;
            opacity: 0.5;
        }

        .empty-state h2 {
            font-size: 24px;
            margin-bottom: 10px;
            color: var(--text);
            border: none;
            padding: 0;
        }

        .empty-state p {
            color: var(--muted);
            margin-bottom: 24px;
        }

        /* ===== Sidebar ===== */
        .sidebar-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .sidebar-card:hover {
            box-shadow: var(--shadow);
        }

        .sidebar-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 10px;
            position: relative;
            color: var(--text);
        }

        .sidebar-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }

        .sidebar-about p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        .sidebar-nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .sidebar-nav-list a i {
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: 8px;
            font-size: 13px;
        }

        .sidebar-nav-list a:hover {
            background: var(--primary-soft);
            color: var(--primary);
            transform: translateX(4px);
        }

        .sidebar-contact p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .sidebar-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            background: var(--surface-alt);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text);
            margin-bottom: 8px;
            transition: var(--transition);
        }

        .sidebar-contact-item:hover {
            background: var(--primary-soft);
            color: var(--primary);
            transform: translateX(2px);
        }

        .sidebar-contact-item i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0 50px;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            gap: 20px;
            flex-wrap: wrap;
        }

        .section-head h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin: 0;
            color: var(--text);
            letter-spacing: -0.3px;
        }

        .section-head .section-sub {
            color: var(--muted);
            font-size: 14px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .related-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(var(--primary-rgb), .25);
        }

        .related-card-img {
            height: 170px;
            background: linear-gradient(135deg, var(--primary-soft), #e0e7ff);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.06);
        }

        .related-card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--text);
            line-height: 1.5;
        }

        .related-card-body h3 a {
            color: inherit;
        }

        .related-card-body h3 a:hover {
            color: var(--primary);
        }

        .related-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--muted);
        }

        .related-card-meta i {
            margin-right: 3px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg);
        }

        .faq-grid {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-xs);
        }

        .faq-item:hover {
            border-color: rgba(var(--primary-rgb), .3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: var(--transition);
            position: relative;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::before {
            content: '';
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }

        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            font-size: 14px;
            color: var(--muted);
            transition: transform .3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-item[open] summary::before {
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 24px 20px 66px;
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1e40af 100%), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            background-blend-mode: overlay;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(255,255,255,.08) 0%, transparent 70%);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(245,158,11,.15) 0%, transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 14px;
            color: #fff;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255,255,255,.85);
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 0;
            font-size: 14px;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-text {
            color: #f1f5f9;
        }

        .footer-brand .brand-text span {
            color: var(--accent);
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
        }

        .footer-desc {
            margin: 16px 0 20px;
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,.08);
            color: #cbd5e1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-title {
            color: #f1f5f9;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a i {
            font-size: 12px;
            color: var(--accent);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #64748b;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 12px;
            }

            .main-nav .nav-link {
                padding: 9px 14px;
                font-size: 14px;
            }

            .header-search {
                display: none;
            }

            .article-sidebar {
                width: 280px;
            }

            .article-body {
                padding: 32px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--surface);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                padding: 12px 20px;
                display: none;
                z-index: 99;
                max-height: calc(100vh - 64px);
                overflow-y: auto;
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }

            .main-nav .nav-link {
                padding: 12px 16px;
                text-align: center;
                font-size: 15px;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .header-tools .btn {
                display: none;
            }

            .article-hero {
                padding: 50px 0 60px;
            }

            .article-layout {
                flex-direction: column;
                padding: 30px 0 30px;
            }

            .article-sidebar {
                width: 100%;
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }

            .article-body {
                padding: 26px 22px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }

            .faq-section,
            .related-section,
            .cta-section {
                padding: 45px 0;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 18px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-body h2 {
                font-size: 1.35rem;
            }

            .article-body h3 {
                font-size: 1.15rem;
            }

            .article-body p {
                font-size: 15px;
            }

            .article-share {
                padding: 16px;
                gap: 8px;
            }

            .share-btn {
                width: 34px;
                height: 34px;
                font-size: 13px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 26px;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

        @media (max-width: 1024px) and (min-width: 769px) {
            .article-sidebar {
                width: 280px;
            }
        }

        @media (max-width: 640px) {
            .header-tools .btn {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1c4d6f;
            --primary-dark: #12384f;
            --primary-light: #e9f1f6;
            --accent: #e29b3c;
            --accent-dark: #c9821f;
            --accent-light: #fdf2e3;
            --body-bg: #f6f8fa;
            --white: #ffffff;
            --text: #1d2a36;
            --text-muted: #5e6d7a;
            --border: #e3e9ef;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(18, 56, 79, 0.06);
            --shadow-md: 0 8px 24px rgba(18, 56, 79, 0.08);
            --shadow-lg: 0 16px 44px rgba(18, 56, 79, 0.14);
            --transition: all 0.25s ease;
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--body-bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; }
        a { text-decoration: none; color: inherit; }
        ul, ol { list-style: none; margin: 0; padding: 0; }
        button { cursor: pointer; }
        input:focus, button:focus, a:focus { outline: 2px solid rgba(226, 155, 60, 0.6); outline-offset: 2px; }

        .grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

        /* ===== Header 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 74px;
        }
        .brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
        .brand-icon {
            width: 42px; height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex; align-items: center; justify-content: center;
            border-radius: 13px;
            font-size: 19px;
            box-shadow: var(--shadow-sm);
        }
        .brand-text { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; color: var(--primary); }
        .brand-text span { color: var(--accent); }

        .main-nav ul { display: flex; align-items: center; gap: 4px; }
        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
        }
        .main-nav .nav-link:hover { background: var(--primary-light); color: var(--primary); }
        .main-nav .nav-link.active { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }

        .header-actions { display: flex; align-items: center; gap: 12px; }
        .search-box { position: relative; }
        .search-box i {
            position: absolute; left: 14px; top: 50%;
            transform: translateY(-50%);
            font-size: 14px;
            color: var(--text-muted);
            pointer-events: none;
        }
        .search-box input {
            width: 220px;
            height: 40px;
            border-radius: 24px;
            border: 1px solid var(--border);
            background: var(--body-bg);
            padding: 0 14px 0 38px;
            font-size: 14px;
            transition: var(--transition);
        }
        .search-box input:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(28, 77, 111, 0.1); }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: none;
        }
        .header-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); background: linear-gradient(135deg, var(--accent-dark), var(--accent)); color: #fff; }
        .menu-toggle {
            display: none;
            background: var(--primary-light);
            border: none;
            width: 42px; height: 42px;
            border-radius: 12px;
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }

        /* ===== Hero 首屏横幅 ===== */
        .page-hero {
            position: relative;
            background: var(--primary-dark) url('/assets/images/backpic/back-1.png') no-repeat center/cover;
            color: #fff;
            padding: 84px 0 96px;
        }
        .page-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(115deg, rgba(18, 56, 79, 0.94) 30%, rgba(28, 77, 111, 0.68) 70%);
        }
        .page-hero .grid-container { position: relative; z-index: 2; }
        .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255, 255, 255, 0.7); margin-bottom: 20px; }
        .breadcrumb a { color: rgba(255, 255, 255, 0.8); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: rgba(255, 255, 255, 0.4); margin: 0 4px; }
        .hero-title { font-size: 42px; line-height: 1.25; font-weight: 800; margin: 0 0 16px; max-width: 720px; }
        .hero-title .highlight { color: var(--accent); }
        .hero-sub { font-size: 17px; line-height: 1.8; color: rgba(255, 255, 255, 0.88); max-width: 620px; margin: 0 0 32px; }
        .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--accent); color: #fff;
            padding: 12px 28px; border-radius: 30px;
            font-weight: 700; font-size: 15px;
            box-shadow: 0 4px 18px rgba(226, 155, 60, 0.35);
            transition: var(--transition);
            border: none;
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 26px rgba(226, 155, 60, 0.45); background: var(--accent-dark); color: #fff; }
        .btn-ghost {
            display: inline-flex; align-items: center; gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.55);
            color: #fff;
            padding: 12px 26px; border-radius: 30px;
            font-weight: 600; font-size: 15px;
            transition: var(--transition);
            background: transparent;
        }
        .btn-ghost:hover { background: rgba(255, 255, 255, 0.14); border-color: #fff; color: #fff; }
        .hero-badges { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 36px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 13px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { color: var(--accent); }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; background: var(--body-bg); }
        .section-alt { background: var(--white); }
        .section-head { text-align: center; max-width: 740px; margin: 0 auto 50px; }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 5px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }
        .section-title { font-size: 30px; font-weight: 800; color: var(--text); margin: 0 0 12px; line-height: 1.3; }
        .section-sub { font-size: 16px; color: var(--text-muted); line-height: 1.8; margin: 0; }

        /* ===== 安全防护卡片 ===== */
        .tech-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 34px 26px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .tech-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(28, 77, 111, 0.18); }
        .tech-icon {
            width: 58px; height: 58px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex; align-items: center; justify-content: center;
            border-radius: 18px;
            font-size: 24px;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .tech-card:hover .tech-icon { background: var(--primary); color: #fff; transform: rotate(-4deg) scale(1.05); }
        .tech-card h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; }
        .tech-card p { font-size: 15px; color: var(--text-muted); line-height: 1.75; margin: 0; }

        /* ===== 数据统计带 ===== */
        .stats-band {
            background: var(--primary-dark) url('/assets/images/backpic/back-2.png') no-repeat center/cover;
            position: relative;
            padding: 70px 0;
            color: #fff;
        }
        .stats-band::before { content: ''; position: absolute; inset: 0; background: rgba(18, 56, 79, 0.9); }
        .stats-band .grid-container { position: relative; z-index: 2; }
        .stats-head { text-align: center; max-width: 660px; margin: 0 auto 48px; }
        .stats-head .section-tag { background: rgba(255, 255, 255, 0.12); color: var(--accent); }
        .stats-head h2 { font-size: 30px; font-weight: 800; color: #fff; margin: 0 0 12px; }
        .stats-head p { font-size: 16px; color: rgba(255, 255, 255, 0.75); margin: 0; }
        .stat-box { text-align: center; padding: 20px; }
        .stat-num { font-size: 42px; font-weight: 800; color: var(--accent); line-height: 1.2; }
        .stat-label { font-size: 15px; color: rgba(255, 255, 255, 0.8); margin-top: 8px; }

        /* ===== 安全流程 ===== */
        .process-card {
            position: relative;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .process-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .process-step {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 18px;
        }
        .process-card h3 { font-size: 18px; font-weight: 700; margin: 0 0 10px; }
        .process-card p { font-size: 14px; color: var(--text-muted); line-height: 1.75; margin: 0; }
        .process-icon { position: absolute; top: 24px; right: 24px; font-size: 34px; color: rgba(28, 77, 111, 0.08); }

        /* ===== 内容资讯卡片 ===== */
        .article-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
        .article-cover { height: 210px; overflow: hidden; }
        .article-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
        .article-card:hover .article-cover img { transform: scale(1.05); }
        .article-body { padding: 26px; display: flex; flex-direction: column; flex: 1; }
        .article-meta { display: flex; gap: 14px; font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }
        .article-meta i { color: var(--accent); margin-right: 4px; }
        .article-body h3 { font-size: 18px; font-weight: 700; line-height: 1.5; margin: 0 0 10px; }
        .article-body h3 a { transition: var(--transition); }
        .article-body h3 a:hover { color: var(--primary); }
        .article-body p { font-size: 14px; color: var(--text-muted); line-height: 1.75; margin: 0 0 18px; flex: 1; }
        .article-link { font-size: 14px; font-weight: 700; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; transition: var(--transition); }
        .article-link:hover { color: var(--accent); gap: 10px; }

        /* ===== 安全指引 ===== */
        .guide-wrap {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .guide-title { font-size: 20px; font-weight: 800; margin: 0 0 24px; display: flex; align-items: center; gap: 10px; }
        .guide-title i { color: var(--accent); }
        .guide-list li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px dashed var(--border); font-size: 15px; align-items: flex-start; }
        .guide-list li:last-child { border-bottom: none; }
        .guide-list .guide-icon { font-size: 16px; color: var(--primary); margin-top: 3px; flex-shrink: 0; }
        .guide-list strong { display: block; font-size: 15px; color: var(--text); }
        .guide-list span { color: var(--text-muted); font-size: 14px; line-height: 1.6; }
        .check-list li { display: flex; gap: 10px; align-items: flex-start; padding: 12px 0; border-bottom: 1px dashed var(--border); font-size: 15px; }
        .check-list li:last-child { border-bottom: none; }
        .check-list i { color: #2f9e6e; margin-top: 5px; }
        .check-list span { color: var(--text-muted); line-height: 1.6; }

        /* ===== FAQ ===== */
        .faq-wrap { max-width: 820px; margin: 0 auto; }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item.open { border-color: rgba(28, 77, 111, 0.3); box-shadow: var(--shadow-md); }
        .faq-q {
            padding: 20px 26px;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            user-select: none;
        }
        .faq-q .faq-arrow { color: var(--accent); transition: transform 0.3s ease; font-size: 14px; }
        .faq-item.open .faq-arrow { transform: rotate(180deg); }
        .faq-a { padding: 0 26px; max-height: 0; overflow: hidden; transition: max-height 0.35s ease; line-height: 1.8; color: var(--text-muted); font-size: 15px; }
        .faq-item.open .faq-a { max-height: 300px; padding-bottom: 24px; }

        /* ===== CTA ===== */
        .cta-banner {
            background: linear-gradient(135deg, #e29b3c, #c9821f);
            border-radius: var(--radius-lg);
            padding: 60px 56px;
            position: relative;
            overflow: hidden;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .cta-banner::before {
            content: '';
            position: absolute; top: -60%; right: -10%; width: 320px; height: 320px;
            background: rgba(255, 255, 255, 0.12); border-radius: 50%;
        }
        .cta-banner h2 { font-size: 30px; font-weight: 800; margin: 0 0 12px; position: relative; }
        .cta-banner p { font-size: 16px; max-width: 560px; margin: 0 auto 28px; position: relative; opacity: 0.95; }
        .cta-actions { position: relative; z-index: 2; }
        .btn-white {
            display: inline-flex; align-items: center; gap: 10px;
            background: #fff; color: var(--accent-dark);
            font-weight: 700; padding: 13px 30px; border-radius: 30px;
            font-size: 15px; transition: var(--transition);
            border: none;
        }
        .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15); color: var(--primary); }
        .btn-outline-white {
            display: inline-flex; align-items: center; gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.7); color: #fff;
            font-weight: 600; padding: 12px 24px; border-radius: 30px;
            margin-left: 12px; transition: var(--transition); font-size: 14px;
            background: transparent;
        }
        .btn-outline-white:hover { background: rgba(255, 255, 255, 0.15); color: #fff; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.78);
            padding: 64px 0 0;
            margin-top: 80px;
        }
        .footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding: 0 0 44px; }
        .footer-brand .brand { margin-bottom: 16px; }
        .footer-brand .brand-icon { background: rgba(255, 255, 255, 0.12); color: var(--accent); }
        .footer-brand .brand-text { color: #fff; }
        .footer-brand .brand-text span { color: var(--accent); }
        .footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.65); margin: 16px 0 20px; max-width: 320px; }
        .footer-social { display: flex; gap: 10px; }
        .footer-social a {
            width: 38px; height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-3px); }
        .footer-title { color: #fff; font-size: 17px; font-weight: 700; margin: 0 0 18px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.65); transition: var(--transition); display: inline-flex; gap: 6px; }
        .footer-links a:hover { color: var(--accent); transform: translateX(3px); }
        .footer-links a i { font-size: 12px; margin-top: 3px; }
        .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 20px 0 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: rgba(255, 255, 255, 0.5); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-main { grid-template-columns: 1fr 1fr; }
            .search-box input { width: 170px; }
        }
        @media (max-width: 900px) {
            .menu-toggle { display: flex; align-items: center; justify-content: center; }
            .main-nav {
                position: fixed;
                top: 74px; left: 0; right: 0;
                background: #fff;
                display: none;
                padding: 16px 20px 20px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
                border-bottom: 1px solid var(--border);
            }
            .main-nav.open { display: block; }
            .main-nav ul { flex-direction: column; gap: 8px; }
            .main-nav .nav-link { display: block; padding: 12px 16px; }
            .header-actions .search-box { display: none; }
            .hero-title { font-size: 32px; }
            .section { padding: 60px 0; }
            .stat-num { font-size: 34px; }
        }
        @media (max-width: 640px) {
            .header-cta span { display: none; }
            .header-cta { padding: 10px 14px; }
            .hero-title { font-size: 28px; }
            .hero-sub { font-size: 15px; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-ghost { justify-content: center; }
            .footer-main { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-banner { padding: 40px 24px; }
            .cta-banner h2 { font-size: 24px; }
            .btn-outline-white { margin: 12px 0 0; }
            .guide-wrap { padding: 24px 20px; }
            .section-title { font-size: 24px; }
            .stats-head h2 { font-size: 24px; }
            .faq-q { padding: 16px 20px; font-size: 15px; }
            .faq-a { padding: 0 20px; }
        }

/* roulang page: category3 */
/* ============================================================
           设计变量
        ============================================================ */
        :root {
            --primary: #2b6cb0;
            --primary-dark: #1a4a7a;
            --primary-light: #ebf4ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f6f9fc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e5e9f0;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
        }

        /* ============================================================
           基础重置
        ============================================================ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        ul,
        ol {
            list-style: none;
        }

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

        input:focus,
        button:focus,
        a:focus {
            outline: 2px solid rgba(43, 108, 176, 0.4);
            outline-offset: 2px;
        }

        /* ============================================================
           通用组件
        ============================================================ */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 58px;
        }

        .section-head .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
        }

        .badge-primary {
            background: rgba(255, 255, 255, 0.18);
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(6px);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            cursor: pointer;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(43, 108, 176, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 22px rgba(43, 108, 176, 0.35);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .btn-light:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ============================================================
           头部导航
        ============================================================ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.04);
            backdrop-filter: blur(12px);
        }

        .site-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(43, 108, 176, 0.28);
        }

        .brand-text {
            font-size: 21px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
        }

        .brand-text span {
            color: var(--primary);
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: block;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 4px 4px 4px 18px;
            width: 240px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(43, 108, 176, 0.1);
        }

        .header-search input {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 14px;
            color: var(--text);
            min-width: 0;
        }

        .header-search input::placeholder {
            color: #a3adc2;
        }

        .search-btn {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            font-size: 14px;
        }

        .search-btn:hover {
            background: var(--primary-dark);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        /* ============================================================
           页面横幅
        ============================================================ */
        .page-banner {
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.82), rgba(30, 64, 110, 0.72)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 110px 0 120px;
            text-align: center;
            color: #fff;
            position: relative;
        }

        .page-banner-content .badge {
            margin-bottom: 22px;
        }

        .page-banner-content h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .page-banner-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 34px;
            line-height: 1.8;
        }

        .banner-search {
            display: flex;
            align-items: center;
            max-width: 560px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 56px;
            padding: 6px 6px 6px 22px;
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.2);
            gap: 8px;
        }

        .banner-search input {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 15px;
            color: var(--text);
            min-width: 0;
            padding: 10px 0;
        }

        .banner-search input::placeholder {
            color: #a3adc2;
        }

        .banner-search .btn {
            flex-shrink: 0;
            border-radius: 50px;
            padding: 11px 28px;
        }

        /* ============================================================
           分类卡片
        ============================================================ */
        .category-cards .cell {
            margin-bottom: 24px;
        }

        .category-card {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            height: 100%;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }

        .category-card:hover {
            border-color: rgba(43, 108, 176, 0.35);
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .category-card:hover::before {
            transform: scaleX(1);
        }

        .category-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 58px;
            height: 58px;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 18px;
        }

        .category-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .category-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .category-link i {
            transition: transform 0.25s ease;
        }

        .category-card:hover .category-link i {
            transform: translateX(4px);
        }

        /* ============================================================
           热门问题板块
        ============================================================ */
        .hot-issue-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .hot-issue-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .hot-issue-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.18), transparent 45%);
        }

        .hot-issues {
            padding: 20px 10px 20px 30px;
        }

        .hot-issues .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .hot-issues h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 24px;
        }

        .hot-issue-list {
            counter-reset: hot;
        }

        .hot-issue-list li {
            counter-increment: hot;
            border-bottom: 1px dashed var(--border);
            transition: var(--transition);
        }

        .hot-issue-list li:last-child {
            border-bottom: none;
        }

        .hot-issue-list a {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-radius: 8px;
        }

        .hot-issue-list a::before {
            content: counter(hot, decimal-leading-zero);
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.35;
            line-height: 1.3;
            font-style: italic;
        }

        .hot-issue-list a:hover {
            color: var(--primary);
            background: var(--primary-light);
            padding-left: 14px;
        }

        /* ============================================================
           FAQ 板块
        ============================================================ */
        .faq-sidebar .faq-sidebar-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            position: sticky;
            top: 100px;
            box-shadow: var(--shadow-sm);
        }

        .faq-sidebar h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }

        .faq-sidebar ul li {
            border-bottom: 1px solid var(--border);
        }

        .faq-sidebar ul li:last-child {
            border: none;
        }

        .faq-sidebar ul a {
            display: block;
            padding: 12px 8px;
            font-size: 15px;
            color: var(--text-light);
            border-radius: 6px;
            position: relative;
            padding-left: 24px;
        }

        .faq-sidebar ul a::before {
            content: "";
            position: absolute;
            left: 8px;
            top: 20px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0.4;
        }

        .faq-sidebar ul a:hover {
            color: var(--primary);
            background: #fff;
            padding-left: 30px;
        }

        .faq-groups .faq-group {
            margin-bottom: 38px;
        }

        .faq-group > h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
            color: var(--text);
            position: relative;
        }

        .faq-group > h3::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--primary);
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--bg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: rgba(43, 108, 176, 0.35);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            text-align: left;
            padding: 19px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: transparent;
            gap: 16px;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

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

        .faq-item.active .faq-question {
            color: var(--primary);
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 16px;
            margin-top: -2px;
        }

        .faq-answer p + p {
            margin-top: 10px;
        }

        /* ============================================================
           数据统计 / 步骤
        ============================================================ */
        .stats-row .cell {
            margin-bottom: 24px;
        }

        .stat-card {
            text-align: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 20px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .stat-number {
            display: block;
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 15px;
            color: var(--text-light);
        }

        .help-steps {
            margin-top: 52px;
        }

        .help-steps .grid-x {
            row-gap: 0;
        }

        .step-item {
            position: relative;
            text-align: center;
            padding: 0 20px;
        }

        .step-item::before {
            content: "";
            position: absolute;
            top: 44px;
            left: -42%;
            width: 84%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary-light), var(--primary-light), transparent);
            z-index: 0;
        }

        .step-item:first-child::before {
            display: none;
        }

        .step-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 88px;
            height: 88px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 30px;
            box-shadow: 0 0 0 8px rgba(43, 108, 176, 0.08);
            position: relative;
            z-index: 1;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 260px;
            margin: 0 auto;
        }

        /* ============================================================
           CTA 区块
        ============================================================ */
        .cta-section {
            background: linear-gradient(115deg, rgba(15, 23, 42, 0.88), rgba(43, 108, 176, 0.82)),
                url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            padding: 96px 0;
            text-align: center;
            color: #fff;
        }

        .cta-box {
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-box p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ============================================================
           页脚
        ============================================================ */
        .site-footer {
            background: #0f172a;
            padding: 68px 0 0;
            color: #94a3b8;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
            gap: 44px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand {
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            background: linear-gradient(135deg, #3b82f6, #1e40af);
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-brand .brand-text span {
            color: #60a5fa;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
            margin-bottom: 20px;
            max-width: 340px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.07);
            color: #cbd5e1;
            font-size: 15px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #f1f5f9;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: #94a3b8;
            transition: var(--transition);
        }

        .footer-links a i {
            font-size: 12px;
            color: #64748b;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #60a5fa;
            padding-left: 5px;
        }

        .footer-links a:hover i {
            color: #60a5fa;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 22px 0 28px;
            font-size: 13px;
            color: #64748b;
        }

        /* ============================================================
           响应式断点
        ============================================================ */
        @media screen and (max-width: 1024px) {
            .section {
                padding: 70px 0;
            }

            .section-head {
                margin-bottom: 40px;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .header-search {
                width: 180px;
            }

            .page-banner {
                padding: 90px 0 100px;
            }

            .page-banner-content h1 {
                font-size: 38px;
            }

            .footer-main {
                grid-template-columns: 1.6fr 1fr 1fr;
                gap: 36px;
            }

            .step-item::before {
                display: none;
            }
        }

        @media screen and (max-width: 768px) {
            .site-header-inner {
                height: 64px;
            }

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                padding: 12px 20px 20px;
                display: none;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }

            .nav-open .main-nav {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }

            .header-actions {
                margin-left: auto;
            }

            .header-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: 70px 0 80px;
            }

            .page-banner-content h1 {
                font-size: 32px;
            }

            .banner-search {
                flex-direction: column;
                background: transparent;
                padding: 0;
                border-radius: 18px;
                gap: 12px;
            }

            .banner-search input {
                background: rgba(255, 255, 255, 0.95);
                border-radius: 50px;
                padding: 14px 22px;
                width: 100%;
            }

            .banner-search .btn {
                width: 100%;
            }

            .hot-issues {
                padding: 30px 0 0;
            }

            .hot-issue-image img {
                height: 260px;
            }

            .faq-sidebar .faq-sidebar-card {
                position: static;
                margin-bottom: 36px;
            }

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 2;
            }

            .step-item {
                margin-bottom: 30px;
            }

            .cta-section {
                padding: 70px 0;
            }

            .cta-box h2 {
                font-size: 28px;
            }
        }

        @media screen and (max-width: 520px) {
            .section {
                padding: 54px 0;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .section-head p {
                font-size: 15px;
            }

            .brand-text {
                font-size: 18px;
            }

            .page-banner {
                padding: 56px 0 64px;
            }

            .page-banner-content h1 {
                font-size: 27px;
            }

            .page-banner-content p {
                font-size: 15px;
            }

            .category-cards .cell {
                margin-bottom: 14px;
            }

            .category-card {
                padding: 22px 18px;
            }

            .hot-issues h2 {
                font-size: 24px;
            }

            .hot-issue-list a {
                font-size: 14px;
                padding: 14px 6px;
            }

            .faq-question {
                padding: 16px;
                font-size: 14px;
            }

            .faq-answer {
                padding: 0 16px 16px;
                font-size: 14px;
            }

            .stat-number {
                font-size: 30px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 30px;
            }

            .footer-brand {
                grid-column: span 1;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn {
                width: 100%;
            }
        }