/* roulang page: index */
:root {
    --color-primary: #162126;
    --color-brand: #0E9F8A;
    --color-bg: #F4F6F7;
    --color-surface: #FFFFFF;
    --color-silver: #AEBFC7;
    --color-red: #E2525B;
    --text-primary: #162126;
    --text-secondary: #5B7079;
    --text-placeholder: #93A7AF;
    --border-color: #E6ECEF;
    --radius-btn: 4px;
    --radius-card: 6px;
    --radius-container: 12px;
    --shadow-default: 0 1px 2px rgba(16, 32, 38, 0.04);
    --shadow-hover: 0 12px 32px rgba(16, 32, 38, 0.08);
    --transition: 0.25s ease;
    --section-gap: 96px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--color-bg);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
    letter-spacing: 0.02em;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-brand); text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-gap) 24px; }
.section-title { font-size: 26px; font-weight: 600; margin: 0 0 12px; color: var(--text-primary); position: relative; }
.section-title::after { content: ''; display: block; width: 40px; height: 2px; background: var(--color-brand); margin-top: 12px; }
.section-desc { color: var(--text-secondary); font-size: 15px; max-width: 640px; margin-bottom: 40px; }

/* ========== 按钮 ========== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    height: 48px; padding: 0 28px; border-radius: var(--radius-btn);
    font-size: 15px; font-weight: 500; letter-spacing: 0.04em;
    border: 1px solid transparent; transition: all var(--transition);
    gap: 8px; line-height: 1;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-brand); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-primary i { transition: transform var(--transition); }
.btn-primary:hover i { transform: translateX(4px); }
.btn-secondary { background: transparent; color: var(--text-primary); border-color: var(--color-silver); }
.btn-secondary:hover { border-color: var(--text-primary); background: rgba(22, 33, 38, 0.04); }
.btn-light { background: #fff; color: var(--text-primary); }
.btn-light:hover { background: var(--color-brand); color: #fff; transform: translateY(-1px); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
a.btn { text-decoration: none; }

/* ========== 移动端顶栏 ========== */
.mobile-header {
    display: none; align-items: center; justify-content: space-between;
    background: var(--color-surface); height: 60px; padding: 0 16px;
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 200;
}
.mobile-toggle { background: none; border: none; font-size: 22px; color: var(--text-primary); padding: 8px; border-radius: var(--radius-btn); }
.mobile-toggle:hover { background: rgba(22, 33, 38, 0.05); }
.mobile-logo { font-weight: 600; font-size: 18px; color: var(--text-primary); }
.mobile-action { color: var(--text-secondary); font-size: 22px; padding: 8px; }

/* ========== 左侧导航栏 ========== */
.app-shell {
    position: fixed; left: 0; top: 0; bottom: 0;
    width: 220px; background: var(--color-surface);
    border-right: 1px solid var(--border-color);
    display: flex; flex-direction: column;
    padding: 24px 16px; z-index: 300;
    transition: transform var(--transition), width var(--transition);
}
.app-brand { margin-bottom: 32px; }
.app-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 600; color: var(--text-primary); }
.logo-mark { width: 36px; height: 36px; border-radius: 50%; background: var(--color-primary); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 14px; position: relative; }
.logo-mark::after { content: ''; position: absolute; width: 14px; height: 2px; background: var(--color-brand); transform: rotate(-45deg); border-radius: 2px; }
.app-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-link {
    display: flex; align-items: center; gap: 12px;
    height: 44px; padding: 0 12px; border-radius: var(--radius-btn);
    font-weight: 500; font-size: 15px; color: var(--text-secondary);
    transition: all var(--transition); position: relative;
}
.nav-link i { width: 18px; text-align: center; font-size: 16px; }
.nav-link:hover { background: #F0F3F5; color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); }
.nav-link.active::before {
    content: ''; position: absolute; left: -16px; top: 10px; bottom: 10px;
    width: 3px; background: var(--color-brand); border-radius: 3px;
}
.nav-link.active { background: rgba(14, 159, 138, 0.06); }
.app-version { border-top: 1px solid var(--border-color); padding-top: 16px; margin-top: 16px; }
.app-version p { font-size: 13px; color: var(--text-placeholder); margin: 0; line-height: 1.6; }

/* ========== 右侧主区域 ========== */
.page-wrapper { margin-left: 220px; transition: margin-left var(--transition); }
.main-content { min-height: calc(100vh - 200px); }
.hero {
    position: relative;
    min-height: 70vh;
    display: flex; align-items: center;
    background: linear-gradient(135deg, rgba(22,33,38,0.92) 0%, rgba(14,159,138,0.35) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding: 80px 24px;
    color: #fff;
    overflow: hidden;
}
.hero::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: linear-gradient(to right, transparent, #fff, transparent); opacity: 0.2; }
.hero-content { max-width: 1200px; margin: 0 auto; width: 100%; }
.hero h1 {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 600; line-height: 1.2; margin: 0 0 24px;
    max-width: 800px; letter-spacing: 0;
}
.hero h1 .highlight { color: var(--color-brand); }
.hero-subtitle { font-size: 18px; line-height: 1.7; color: var(--color-silver); max-width: 560px; margin: 0 0 36px; }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.hero .btn { min-width: 170px; }
.scroll-indicator { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); color: var(--color-silver); font-size: 20px; animation: floatY 2s infinite; }
@keyframes floatY { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,8px); } }

/* ========== 统计条 ========== */
.stats-strip { background: var(--color-primary); color: #fff; padding: 32px 24px; }
.stats-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 16px; }
.stat-number { font-size: 32px; font-weight: 600; color: var(--color-brand); display: block; margin-bottom: 4px; }
.stat-label { font-size: 14px; color: var(--color-silver); }

/* ========== 时间线 ========== */
.timeline-section { padding: var(--section-gap) 24px; background: var(--color-surface); }
.timeline-inner { max-width: 1200px; margin: 0 auto; }
.timeline {
    position: relative; padding-left: 32px; max-width: 720px;
}
.timeline::before {
    content: ''; position: absolute; left: 8px; top: 0; bottom: 0;
    width: 2px; background: var(--color-silver);
}
.timeline-item { position: relative; padding: 24px 0; }
.timeline-dot {
    position: absolute; left: -32px; top: 28px;
    width: 14px; height: 14px; border-radius: 50%;
    background: var(--color-surface); border: 2px solid var(--color-brand);
    transition: box-shadow var(--transition);
}
.timeline-item.current .timeline-dot { background: var(--color-brand); box-shadow: 0 0 0 6px rgba(14, 159, 138, 0.2); }
.timeline-item:hover .timeline-dot { box-shadow: 0 0 0 8px rgba(14, 159, 138, 0.15); }
.timeline-date { font-size: 13px; color: var(--text-placeholder); letter-spacing: 0.05em; margin-bottom: 4px; }
.timeline-title { font-size: 18px; font-weight: 600; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; color: var(--text-primary); }
.timeline-summary { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.timeline-badge {
    display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 10px;
    background: rgba(14, 159, 138, 0.12); color: var(--color-brand); font-weight: 500; white-space: nowrap;
}
.timeline-badge.closed { background: rgba(174, 191, 199, 0.2); color: var(--text-placeholder); }
.timeline-badge.upcoming { background: rgba(226, 82, 91, 0.1); color: var(--color-red); }

/* ========== 亮点区 ========== */
.highlights-section { padding: var(--section-gap) 24px; }
.highlights-inner { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; gap: 64px; }
.highlight-item { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.highlight-item.reverse .highlight-media { order: 2; }
.highlight-item.reverse .highlight-content { order: 1; }
.highlight-media { border-radius: var(--radius-container); overflow: hidden; box-shadow: var(--shadow-hover); }
.highlight-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 10; transition: transform 0.4s ease; }
.highlight-item:hover .highlight-media img { transform: scale(1.03); }
.highlight-content { position: relative; }
.highlight-number {
    font-size: 72px; font-weight: 600; color: #DDE4E7; line-height: 1;
    display: block; margin-bottom: 16px; user-select: none;
}
.highlight-content h3 { font-size: 20px; font-weight: 600; margin: 0 0 12px; color: var(--text-primary); }
.highlight-content p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.highlight-content ul { list-style: none; }
.highlight-content ul li { font-size: 14px; color: var(--text-secondary); padding-left: 20px; position: relative; margin-bottom: 6px; }
.highlight-content ul li::before { content: ''; position: absolute; left: 0; top: 10px; width: 8px; height: 8px; border-radius: 2px; background: var(--color-brand); }

/* ========== 票种对比 ========== */
.pricing-section { padding: var(--section-gap) 24px; background: var(--color-surface); }
.pricing-inner { max-width: 1200px; margin: 0 auto; }
.pricing-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.pricing-table { width: 100%; min-width: 720px; border-collapse: collapse; background: var(--color-surface); border-radius: var(--radius-card); }
.pricing-table th, .pricing-table td { padding: 16px 24px; text-align: center; border-bottom: 1px solid var(--border-color); }
.pricing-table th { background: var(--color-primary); color: #fff; font-weight: 500; font-size: 15px; }
.pricing-table th:first-child { text-align: left; border-radius: var(--radius-btn) 0 0 0; }
.pricing-table td { font-size: 14px; color: var(--text-secondary); }
.pricing-table td:first-child { text-align: left; color: var(--text-primary); font-weight: 500; }
.pricing-table tbody tr:nth-child(even) { background: rgba(244, 246, 247, 0.6); }
.pricing-table .recommend-col { position: relative; background: rgba(14, 159, 138, 0.05); border-left: 1px solid rgba(14, 159, 138, 0.2); border-right: 1px solid rgba(14, 159, 138, 0.2); }
.pricing-table th.recommend-col { background: #0f352f; }
.pricing-table .recommend-col td { color: var(--text-primary); }
.rec-badge {
    display: inline-block; background: var(--color-red); color: #fff;
    font-size: 11px; padding: 2px 6px; border-radius: 4px; margin-left: 4px;
    vertical-align: middle; font-weight: 400;
}
.pricing-btn { margin-top: 12px; }
.pricing-note { margin-top: 24px; font-size: 13px; color: var(--text-placeholder); border-top: 1px dashed var(--border-color); padding-top: 16px; }

/* ========== 报名CTA ========== */
.cta-section { padding: var(--section-gap) 24px; background: linear-gradient(120deg, #0b1f26 0%, #0e3a3a 100%); color: #fff; }
.cta-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; }
.cta-left h2 { font-size: 32px; font-weight: 600; margin: 0 0 16px; }
.cta-left > p { color: var(--color-silver); margin-bottom: 32px; line-height: 1.7; }
.cta-form { display: flex; flex-direction: column; gap: 16px; background: rgba(255,255,255,0.04); padding: 32px; border-radius: var(--radius-container); border: 1px solid rgba(255,255,255,0.08); }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 500; color: var(--color-silver); }
.form-group input, .form-group select, .form-group textarea {
    height: 44px; background: #fff; border: 1px solid var(--color-silver);
    border-radius: var(--radius-btn); padding: 0 12px; font-size: 15px; color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none; width: 100%;
}
.form-group textarea { height: auto; min-height: 100px; padding: 12px; line-height: 1.6; resize: vertical; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 4px rgba(14, 159, 138, 0.15);
}
.form-group select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235B7079' stroke-width='2' fill='none'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; }
.form-submit { height: 48px; background: var(--color-brand); color: #fff; border: none; border-radius: var(--radius-btn); font-size: 16px; font-weight: 600; letter-spacing: 0.06em; transition: background var(--transition), transform var(--transition); margin-top: 8px; }
.form-submit:hover { background: #0b8572; transform: translateY(-1px); }
.cta-right { display: flex; flex-direction: column; justify-content: center; gap: 24px; }
.cta-contact-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-card); padding: 24px; }
.cta-contact-card h4 { font-size: 16px; font-weight: 600; margin: 0 0 12px; color: #fff; }
.cta-contact-card p { font-size: 14px; color: var(--color-silver); line-height: 1.7; margin: 0 0 8px; }
.cta-contact-card i { color: var(--color-brand); margin-right: 8px; width: 16px; }
.qr-placeholder { width: 120px; height: 120px; background: rgba(255,255,255,0.1); border-radius: var(--radius-card); display: flex; align-items: center; justify-content: center; color: var(--color-silver); font-size: 13px; border: 1px dashed rgba(255,255,255,0.2); }

/* ========== 资讯列表 ========== */
.news-section { padding: var(--section-gap) 24px; background: var(--color-bg); }
.news-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 300px; gap: 40px; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-card {
    display: block; background: var(--color-surface); border: 1px solid var(--border-color);
    border-radius: var(--radius-card); padding: 24px;
    transition: box-shadow var(--transition), border-color var(--transition);
}
.news-card:hover { border-color: var(--color-brand); box-shadow: var(--shadow-hover); }
.news-card-top { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.news-tag { display: inline-block; font-size: 12px; font-weight: 500; color: var(--color-brand); background: rgba(14, 159, 138, 0.1); padding: 2px 8px; border-radius: 4px; }
.news-date { font-size: 13px; color: var(--text-placeholder); }
.news-card h3 { font-size: 18px; font-weight: 600; margin: 0 0 8px; color: var(--text-primary); transition: color var(--transition); }
.news-card:hover h3 { color: var(--color-brand); }
.news-card p { font-size: 14px; color: var(--text-secondary); margin: 0 0 12px; line-height: 1.7; }
.news-card-more { font-size: 13px; color: var(--text-placeholder); display: inline-flex; align-items: center; gap: 6px; }
.news-card-more i { transition: transform var(--transition); font-size: 12px; }
.news-card:hover .news-card-more i { transform: translateX(4px); }
.news-sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-card { background: var(--color-surface); border: 1px solid var(--border-color); border-radius: var(--radius-card); padding: 20px; }
.sidebar-card h4 { font-size: 16px; font-weight: 600; margin: 0 0 12px; }
.sidebar-links { display: flex; flex-direction: column; gap: 4px; }
.sidebar-links a { font-size: 14px; color: var(--text-secondary); padding: 6px 0; border-bottom: 1px dashed var(--border-color); transition: color var(--transition); }
.sidebar-links a:hover { color: var(--color-brand); }
.empty-state { text-align: center; padding: 48px; background: var(--color-surface); border: 1px dashed var(--color-silver); border-radius: var(--radius-card); }
.empty-icon { width: 64px; height: 64px; border-radius: 50%; border: 2px solid var(--color-silver); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; color: var(--color-silver); font-size: 24px; position: relative; }
.empty-icon::after { content: ''; position: absolute; width: 8px; height: 8px; border-radius: 50%; background: rgba(174, 191, 199, 0.6); }
.empty-state p { color: var(--text-placeholder); font-size: 15px; margin: 0 0 12px; }
.empty-state a { font-size: 14px; text-decoration: underline; color: var(--color-brand); }

/* ========== FAQ ========== */
.faq-section { padding: var(--section-gap) 24px; background: var(--color-surface); }
.faq-inner { max-width: 800px; margin: 0 auto; }
.faq-accordion { background: transparent; border: none; }
.faq-item { background: transparent; border: none; border-top: 1px solid var(--color-silver); border-bottom: 1px solid var(--color-silver); margin-bottom: -1px; border-radius: 0; }
.faq-item .accordion-title { background: transparent; border: none; font-size: 16px; font-weight: 600; color: var(--text-primary); padding: 20px 8px; position: relative; transition: color var(--transition); }
.faq-item .accordion-title:hover, .faq-item .accordion-title:focus { background: transparent; color: var(--color-brand); }
.faq-item.is-active .accordion-title { color: var(--color-brand); }
.faq-item.is-active::before { content: ''; position: absolute; left: -1px; top: 0; bottom: 0; width: 2px; background: var(--color-brand); }
.faq-answer { background: transparent; border: none; padding: 0 8px 24px; color: var(--text-secondary); font-size: 14px; line-height: 1.8; }

/* ========== 页脚 ========== */
.site-footer { background: var(--color-surface); border-top: 1px solid var(--border-color); padding: 48px 24px 32px; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.5fr 1fr; gap: 40px; align-items: start; }
.footer-brand .footer-logo { font-size: 20px; font-weight: 600; color: var(--text-primary); display: block; margin-bottom: 8px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); margin: 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-nav a { font-size: 14px; color: var(--text-secondary); transition: color var(--transition); }
.footer-nav a:hover { color: var(--color-brand); }
.footer-meta { text-align: right; }
.footer-meta p { font-size: 13px; color: var(--text-placeholder); margin: 0 0 4px; }
.footer-social { display: flex; gap: 12px; justify-content: flex-end; margin-top: 12px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--color-silver); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 14px; transition: all var(--transition); }
.footer-social a:hover { background: var(--color-brand); border-color: var(--color-brand); color: #fff; transform: translateY(-2px); }

/* ========== 抽屉 ========== */
.drawer-overlay { display: none; position: fixed; inset: 0; background: rgba(22, 33, 38, 0.5); z-index: 290; opacity: 0; transition: opacity var(--transition); }
.drawer-overlay.show { display: block; opacity: 1; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .app-shell { width: 72px; padding: 24px 12px; }
    .app-logo { justify-content: center; }
    .logo-text, .app-version p { display: none; }
    .nav-link { justify-content: center; padding: 0; }
    .nav-link span { display: none; }
    .nav-link i { font-size: 18px; }
    .nav-link.active::before { left: -12px; }
    .page-wrapper { margin-left: 72px; }
}
@media (max-width: 768px) {
    .mobile-header { display: flex; }
    .app-shell { transform: translateX(-100%); width: 220px; padding: 24px 16px; }
    .app-shell.open { transform: translateX(0); box-shadow: 0 0 60px rgba(16, 32, 38, 0.2); }
    .app-logo { justify-content: flex-start; }
    .logo-text { display: block; }
    .nav-link { justify-content: flex-start; padding: 0 12px; }
    .nav-link span { display: inline; }
    .nav-link i { font-size: 16px; }
    .nav-link.active::before { left: -16px; }
    .page-wrapper { margin-left: 0; }
    .hero { min-height: 60vh; padding: 60px 24px; }
    .hero h1 { font-size: 36px; }
    .hero-subtitle { font-size: 16px; }
    .timeline-inner { padding: 0; }
    .highlight-item { grid-template-columns: 1fr; gap: 24px; }
    .highlight-item.reverse .highlight-media { order: 0; }
    .highlight-item.reverse .highlight-content { order: 1; }
    .cta-inner { grid-template-columns: 1fr; gap: 32px; }
    .stats-inner { grid-template-columns: repeat(2, 1fr); }
    .news-inner { grid-template-columns: 1fr; }
    .news-sidebar { flex-direction: row; flex-wrap: wrap; }
    .sidebar-card { flex: 1; min-width: 200px; }
    .footer-inner { grid-template-columns: 1fr; text-align: center; }
    .footer-nav { justify-content: center; }
    .footer-meta { text-align: center; }
    .footer-social { justify-content: center; }
    .hero-ctas { flex-direction: column; }
    .hero .btn { width: 100%; }
}
@media (max-width: 640px) {
    .section { padding: 56px 16px; }
    .hero { padding: 48px 20px; }
    .hero h1 { font-size: 32px; line-height: 1.3; }
    .stats-inner { grid-template-columns: 1fr 1fr; gap: 0; }
    .pricing-wrap { min-width: 0; }
    .pricing-table { min-width: 640px; }
    .highlight-number { font-size: 56px; }
    .cta-form { padding: 20px; }
    .timeline { padding-left: 24px; }
    .timeline-dot { left: -24px; width: 10px; height: 10px; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}

/* roulang page: category1 */
:root {
            --primary: #162126;
            --brand: #0E9F8A;
            --brand-dark: #0B7F6F;
            --bg: #F4F6F7;
            --surface: #FFFFFF;
            --silver: #AEBFC7;
            --danger: #E2525B;
            --text-main: #162126;
            --text-secondary: #5B7079;
            --text-placeholder: #93A7AF;
            --radius-sm: 4px;
            --radius-md: 6px;
            --shadow-sm: 0 1px 2px rgba(16, 32, 38, 0.04);
            --shadow-hover: 0 12px 32px rgba(16, 32, 38, 0.08);
            --space-section: 96px;
            --sidebar-width: 220px;
            --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.02em;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        ul,
        ol {
            list-style-position: inside;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        .section {
            padding: var(--space-section) 0;
        }

        .section-title {
            font-size: 26px;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: var(--text-main);
            margin-bottom: 12px;
            position: relative;
            padding-bottom: 16px;
        }

        .section-title::after {
            content: "";
            display: block;
            width: 40px;
            height: 2px;
            background: var(--brand);
            margin-top: 12px;
        }

        .section-sub {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 40px;
            max-width: 640px;
            line-height: 1.8;
        }

        /* App Shell */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .app-sidebar {
            width: var(--sidebar-width);
            background: #F9FBFB;
            border-right: 1px solid #E6ECEF;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 20px 16px;
            transition: width var(--transition);
        }

        .sidebar-brand {
            padding: 8px 8px 20px;
            border-bottom: 1px solid #E6ECEF;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
        }

        .brand-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--brand);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(14, 159, 138, 0.25);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .app-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 44px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            transition: background var(--transition), color var(--transition);
        }

        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .nav-link:hover {
            background: #F0F3F5;
            color: var(--text-main);
        }

        .nav-link.active {
            color: var(--text-main);
            font-weight: 600;
            background: #EFF7F5;
        }

        .nav-link.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 3px;
            border-radius: 2px;
            background: var(--brand);
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid #E6ECEF;
            font-size: 13px;
            color: var(--text-placeholder);
            line-height: 1.6;
        }

        .main-wrapper {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .site-main {
            flex: 1;
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 90;
            background: #FFF;
            border-bottom: 1px solid #E6ECEF;
            height: 56px;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }

        .menu-toggle {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-main);
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .menu-toggle:hover {
            background: #F0F3F5;
        }

        .mobile-brand {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
        }

        .mobile-action {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-secondary);
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(22, 33, 38, 0.5);
            z-index: 95;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .drawer-overlay.show {
            display: block;
            opacity: 1;
        }

        .app-sidebar.mobile-open {
            transform: translateX(0);
            box-shadow: 4px 0 32px rgba(16, 32, 38, 0.18);
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            min-height: 240px;
            display: flex;
            align-items: center;
            background-color: #162126;
            overflow: hidden;
        }

        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.45;
        }

        .category-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, #162126 0%, #162126 40%, rgba(14, 159, 138, 0.45) 100%);
        }

        .category-hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 60px 0;
        }

        .hero-overline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
            background: rgba(14, 159, 138, 0.12);
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid rgba(14, 159, 138, 0.25);
        }

        .category-hero h1 {
            color: #fff;
            font-size: 38px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .hero-sub {
            color: var(--silver);
            font-size: 17px;
            max-width: 620px;
            line-height: 1.7;
        }

        /* Intro Section */
        .intro-section {
            background: var(--bg);
        }

        .intro-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            height: 100%;
        }

        .intro-image {
            height: 100%;
            min-height: 320px;
            background-size: cover;
            background-position: center;
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
        }

        .intro-body {
            padding: 40px;
        }

        .intro-body h2 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.4;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--brand);
            display: inline-block;
        }

        .intro-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .intro-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .intro-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text-main);
        }

        .intro-list li i {
            color: var(--brand);
            font-size: 14px;
        }

        /* Document List */
        .doc-list-section {
            background: var(--surface);
            border-top: 1px solid #E6ECEF;
            border-bottom: 1px solid #E6ECEF;
        }

        .doc-list {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
        }

        .doc-item {
            display: flex;
            gap: 28px;
            padding: 32px 0;
            border-bottom: 1px solid #E6ECEF;
            transition: background var(--transition);
            position: relative;
        }

        .doc-item:last-child {
            border-bottom: none;
        }

        .doc-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--brand);
            opacity: 0;
            border-radius: 2px;
            transition: opacity var(--transition);
        }

        .doc-item:hover::before {
            opacity: 1;
        }

        .doc-item:hover {
            background: #FAFBFC;
        }

        .doc-num {
            font-size: 40px;
            font-weight: 700;
            color: #DDE4E7;
            line-height: 1;
            flex-shrink: 0;
            min-width: 56px;
            letter-spacing: -0.02em;
            font-family: -apple-system, "SF Pro Display", "Segoe UI", sans-serif;
        }

        .doc-body {
            flex: 1;
            padding-left: 4px;
        }

        .doc-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .doc-meta {
            font-size: 13px;
            color: var(--text-placeholder);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .doc-meta i {
            font-size: 12px;
        }

        .doc-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .doc-tag {
            display: inline-block;
            background: #EFF7F5;
            color: var(--brand-dark);
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 12px;
            margin-left: 8px;
            vertical-align: middle;
        }

        /* Feature Cards */
        .feature-section {
            background: var(--bg);
        }

        .feature-grid {
            margin-top: 24px;
        }

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid #E6ECEF;
            padding: 32px 28px;
            transition: box-shadow var(--transition), transform var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

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

        .feature-card:hover .feature-arrow {
            transform: translateX(4px);
            color: var(--brand);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: #EFF7F5;
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-main);
        }

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

        .feature-arrow {
            color: var(--silver);
            font-size: 14px;
            transition: transform var(--transition), color var(--transition);
        }

        /* FAQ Section */
        .faq-section {
            background: var(--surface);
            border-top: 1px solid #E6ECEF;
        }

        .faq-wrap {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--silver);
            position: relative;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--silver);
        }

        .faq-item.open {
            border-left: 2px solid var(--brand);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 22px 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
            gap: 16px;
        }

        .faq-question .faq-icon {
            color: var(--silver);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question {
            color: var(--brand);
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--brand);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 16px 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        /* CTA Section */
        .cta-section {
            background: #162126;
            position: relative;
            overflow: hidden;
            padding: 72px 0;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(14, 159, 138, 0.15);
        }

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

        .cta-content h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .cta-content p {
            color: var(--silver);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            border: none;
            line-height: 1;
            min-width: 170px;
            letter-spacing: 0.02em;
        }

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

        .btn-primary:hover {
            background: var(--brand);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(14, 159, 138, 0.3);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.6);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border: 1px solid var(--silver);
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(14, 159, 138, 0.05);
        }

        /* Footer */
        .site-footer {
            background: #F9FBFB;
            border-top: 1px solid #E6ECEF;
            padding: 48px 0 28px;
            margin-top: 0;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            display: block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-nav a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-nav a:hover {
            color: var(--brand);
        }

        .footer-meta {
            font-size: 14px;
            color: var(--text-placeholder);
            line-height: 1.7;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid #E6ECEF;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 15px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--brand);
            border-color: var(--brand);
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .app-sidebar {
                width: 72px;
                padding: 20px 10px;
            }

            .brand-text,
            .nav-text,
            .sidebar-footer {
                display: none;
            }

            .sidebar-brand {
                padding: 8px 4px 20px;
                justify-content: center;
            }

            .nav-link {
                justify-content: center;
                padding: 0;
            }

            .nav-link i {
                font-size: 18px;
            }

            .nav-link.active::before {
                left: auto;
                right: 8px;
                top: 12px;
                bottom: 12px;
            }

            .main-wrapper {
                margin-left: 72px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
            }

            .app-sidebar {
                transform: translateX(-100%);
                width: 260px;
                padding: 20px 16px;
                transition: transform var(--transition);
            }

            .app-sidebar.mobile-open {
                transform: translateX(0);
                width: 260px;
            }

            .app-sidebar.mobile-open .brand-text,
            .app-sidebar.mobile-open .nav-text,
            .app-sidebar.mobile-open .sidebar-footer {
                display: block;
            }

            .app-sidebar.mobile-open .nav-link {
                justify-content: flex-start;
                padding: 0 14px;
            }

            .app-sidebar.mobile-open .nav-link.active::before {
                left: 0;
                right: auto;
                top: 10px;
                bottom: 10px;
            }

            .main-wrapper {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .category-hero {
                min-height: 200px;
            }

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

            .hero-sub {
                font-size: 15px;
            }

            .intro-body {
                padding: 28px 24px;
            }

            .doc-item {
                gap: 16px;
            }

            .doc-num {
                font-size: 28px;
                min-width: 40px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .category-hero-content {
                padding: 40px 0;
            }

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

            .hero-sub {
                font-size: 14px;
                line-height: 1.6;
            }

            .section-title {
                font-size: 22px;
            }

            .doc-item {
                flex-direction: column;
                gap: 8px;
                padding: 24px 0;
            }

            .doc-num {
                font-size: 24px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
                max-width: 300px;
                margin: 0 auto;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: article */
:root {
        --ink: #162126;
        --brand: #0E9F8A;
        --brand-dark: #0B7F6E;
        --bg: #F4F6F7;
        --surface: #FFFFFF;
        --silver: #AEBFC7;
        --danger: #E2525B;
        --text-main: #162126;
        --text-sub: #5B7079;
        --text-placeholder: #93A7AF;
        --border: #E6ECEF;
        --radius: 6px;
        --radius-sm: 4px;
        --shadow-sm: 0 1px 2px rgba(16, 32, 38, 0.04);
        --shadow-md: 0 12px 32px rgba(16, 32, 38, 0.08);
        --shadow-brand: 0 4px 20px rgba(14, 159, 138, 0.18);
        --transition: 0.25s ease;
        --nav-width: 220px;
        --topbar-height: 60px;
    }

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

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

    body {
        font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        font-size: 16px;
        line-height: 1.8;
        letter-spacing: 0.02em;
        color: var(--text-main);
        background: var(--bg);
        min-height: 100vh;
    }

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

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

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

    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }

    button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
        outline: 2px solid var(--brand);
        outline-offset: 2px;
        border-radius: var(--radius-sm);
    }

    .container {
        max-width: 1200px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
        width: 100%;
    }

    /* ===== App Shell ===== */
    .app-shell {
        display: flex;
        min-height: 100vh;
    }

    .app-sidebar {
        width: var(--nav-width);
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        background: var(--surface);
        border-right: 1px solid var(--border);
        z-index: 1000;
        display: flex;
        flex-direction: column;
        transition: transform 0.3s ease;
    }

    .sidebar-inner {
        display: flex;
        flex-direction: column;
        height: 100%;
        padding: 24px 16px;
    }

    .sidebar-logo {
        height: 56px;
        display: flex;
        align-items: center;
        padding: 0 8px;
        margin-bottom: 32px;
        border-bottom: 1px solid var(--border);
    }

    .logo-link {
        display: flex;
        align-items: center;
        gap: 12px;
        color: var(--ink);
        font-weight: 600;
        font-size: 18px;
        letter-spacing: 0.02em;
    }

    .logo-link:hover {
        color: var(--brand);
    }

    .logo-mark {
        width: 36px;
        height: 36px;
        background: var(--ink);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
    }

    .logo-text {
        white-space: nowrap;
        font-size: 17px;
        font-weight: 600;
    }

    .app-nav {
        display: flex;
        flex-direction: column;
        gap: 4px;
        flex: 1;
    }

    .nav-link {
        display: flex;
        align-items: center;
        height: 44px;
        padding: 0 14px;
        border-radius: var(--radius-sm);
        color: var(--text-sub);
        font-weight: 500;
        font-size: 15px;
        border-left: 3px solid transparent;
        transition: all var(--transition);
    }

    .nav-link i {
        width: 20px;
        text-align: center;
        margin-right: 12px;
        font-size: 15px;
        flex-shrink: 0;
        color: var(--text-placeholder);
        transition: color var(--transition);
    }

    .nav-link:hover {
        background: #F0F3F5;
        color: var(--ink);
    }

    .nav-link:hover i {
        color: var(--brand);
    }

    .nav-link.active {
        background: #F0F3F5;
        color: var(--ink);
        border-left-color: var(--brand);
    }

    .nav-link.active i {
        color: var(--brand);
    }

    .sidebar-foot {
        padding: 16px 8px 0;
        border-top: 1px solid var(--border);
        font-size: 13px;
        color: var(--text-placeholder);
        line-height: 1.6;
    }

    .sidebar-foot p {
        margin-bottom: 2px;
    }

    .app-main {
        flex: 1;
        margin-left: var(--nav-width);
        min-width: 0;
        display: flex;
        flex-direction: column;
        min-height: 100vh;
        background: var(--bg);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(22, 33, 38, 0.6);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }

    /* ===== Mobile Topbar ===== */
    .mobile-topbar {
        display: none;
        height: var(--topbar-height);
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        align-items: center;
        padding: 0 16px;
        position: sticky;
        top: 0;
        z-index: 900;
        gap: 12px;
    }

    .mobile-menu-btn {
        width: 42px;
        height: 42px;
        border: 1px solid var(--border);
        background: var(--surface);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: var(--ink);
        font-size: 18px;
        transition: all var(--transition);
    }

    .mobile-menu-btn:hover {
        border-color: var(--brand);
        color: var(--brand);
    }

    .mobile-logo {
        font-size: 18px;
        font-weight: 600;
        color: var(--ink);
        display: flex;
        align-items: center;
        gap: 10px;
        flex: 1;
    }

    .mobile-logo i {
        color: var(--brand);
    }

    .mobile-topbar-right {
        width: 42px;
        display: flex;
        justify-content: flex-end;
        color: var(--text-placeholder);
    }

    /* ===== Article Banner ===== */
    .article-page {
        flex: 1;
    }

    .article-banner {
        position: relative;
        background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
        height: 260px;
        display: flex;
        align-items: flex-end;
    }

    .banner-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to bottom, rgba(22, 33, 38, 0.25) 0%, rgba(22, 33, 38, 0.45) 50%, rgba(22, 33, 38, 0.88) 100%);
    }

    .article-banner-content {
        position: relative;
        z-index: 2;
        padding-bottom: 48px;
    }

    .breadcrumb {
        font-size: 14px;
        color: var(--silver);
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
    }

    .breadcrumb a {
        color: var(--silver);
        transition: color var(--transition);
    }

    .breadcrumb a:hover {
        color: #fff;
    }

    .breadcrumb-sep {
        color: rgba(255, 255, 255, 0.4);
    }

    .breadcrumb-current {
        color: #fff;
        max-width: 360px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* ===== Article Card ===== */
    .article-container {
        position: relative;
        z-index: 3;
        margin-top: -48px;
        padding-bottom: 80px;
    }

    .article-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        box-shadow: var(--shadow-md);
        padding: 48px;
        max-width: 900px;
        margin: 0 auto 48px;
    }

    .article-title {
        font-size: clamp(28px, 4vw, 42px);
        font-weight: 600;
        line-height: 1.3;
        color: var(--ink);
        margin-bottom: 24px;
        letter-spacing: 0.02em;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 24px;
        padding-bottom: 24px;
        border-bottom: 1px solid var(--border);
        margin-bottom: 32px;
        font-size: 14px;
        color: var(--text-sub);
    }

    .meta-item {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .meta-item i {
        color: var(--brand);
        font-size: 14px;
    }

    /* ===== Article Body ===== */
    .article-body {
        font-size: 16px;
        line-height: 1.8;
        color: var(--text-main);
    }

    .article-body h2 {
        font-size: 24px;
        font-weight: 600;
        margin: 40px 0 16px;
        color: var(--ink);
        padding-bottom: 12px;
        border-bottom: 1px solid var(--border);
        position: relative;
    }

    .article-body h2::after {
        content: "";
        position: absolute;
        bottom: -1px;
        left: 0;
        width: 48px;
        height: 2px;
        background: var(--brand);
        border-radius: 2px;
    }

    .article-body h3 {
        font-size: 20px;
        font-weight: 600;
        margin: 32px 0 12px;
        color: var(--ink);
    }

    .article-body p {
        margin-bottom: 20px;
        line-height: 1.8;
    }

    .article-body ul, .article-body ol {
        margin: 0 0 24px;
        padding-left: 24px;
    }

    .article-body li {
        margin-bottom: 8px;
        line-height: 1.7;
    }

    .article-body li::marker {
        color: var(--brand);
    }

    .article-body blockquote {
        border-left: 4px solid var(--brand);
        background: #F0F9F7;
        padding: 16px 24px;
        margin: 24px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-sub);
        font-size: 15px;
    }

    .article-body table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 14px;
    }

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

    .article-body td {
        padding: 12px 16px;
        border-bottom: 1px solid var(--border);
        line-height: 1.7;
    }

    .article-body tr:nth-child(even) td {
        background: #F9FBFB;
    }

    .article-body img {
        max-width: 100%;
        border-radius: var(--radius);
        margin: 24px 0;
    }

    .article-body code {
        background: #F0F3F5;
        padding: 2px 8px;
        border-radius: var(--radius-sm);
        font-size: 0.9em;
        color: var(--brand-dark);
    }

    .article-body pre {
        background: var(--ink);
        color: #E8EDEF;
        padding: 20px 24px;
        border-radius: var(--radius);
        overflow-x: auto;
        margin: 24px 0;
        font-size: 14px;
        line-height: 1.6;
    }

    .article-body pre code {
        background: transparent;
        color: inherit;
        padding: 0;
    }

    .article-body a {
        text-decoration: underline;
        text-underline-offset: 4px;
    }

    /* ===== Not Found ===== */
    .not-found {
        text-align: center;
        padding: 60px 20px;
    }

    .not-found-icon {
        width: 72px;
        height: 72px;
        border: 2px solid var(--silver);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
        font-size: 28px;
        color: var(--text-placeholder);
        position: relative;
    }

    .not-found-icon::after {
        content: "";
        position: absolute;
        width: 8px;
        height: 8px;
        background: var(--brand);
        border-radius: 50%;
        top: 12px;
        right: 12px;
    }

    .not-found-text {
        font-size: 18px;
        font-weight: 500;
        color: var(--text-main);
        margin-bottom: 16px;
    }

    .not-found-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--brand);
        font-size: 14px;
    }

    .not-found-link:hover {
        color: var(--brand-dark);
    }

    /* ===== Article Footer ===== */
    .article-footer {
        margin-top: 40px;
        padding-top: 32px;
        border-top: 1px solid var(--border);
    }

    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 24px;
    }

    .tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 14px;
        background: #F0F3F5;
        color: var(--text-sub);
        border-radius: 20px;
        font-size: 13px;
        font-weight: 500;
        transition: all var(--transition);
        cursor: default;
    }

    .tag:hover {
        background: #E8F5F2;
        color: var(--brand);
    }

    .article-prev-next {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .prev-next-link {
        display: block;
        padding: 16px 20px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        background: #F9FBFB;
        transition: all var(--transition);
        color: var(--text-main);
    }

    .prev-next-link:hover {
        border-color: var(--brand);
        box-shadow: var(--shadow-sm);
        color: var(--ink);
        transform: translateY(-2px);
    }

    .pn-direction {
        display: block;
        font-size: 13px;
        color: var(--text-placeholder);
        margin-bottom: 4px;
    }

    .pn-title {
        font-size: 15px;
        font-weight: 500;
        display: block;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* ===== Related ===== */
    .related-section {
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 24px;
    }

    .section-title {
        font-size: 26px;
        font-weight: 600;
        color: var(--ink);
        position: relative;
        padding-left: 16px;
    }

    .section-title::before {
        content: "";
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 4px;
        height: 22px;
        background: var(--brand);
        border-radius: 2px;
    }

    .section-more {
        font-size: 14px;
        color: var(--text-sub);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: all var(--transition);
    }

    .section-more:hover {
        color: var(--brand);
    }

    .section-more i {
        transition: transform var(--transition);
    }

    .section-more:hover i {
        transform: translateX(4px);
    }

    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .related-card {
        display: block;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: all var(--transition);
        box-shadow: var(--shadow-sm);
    }

    .related-card:hover {
        border-color: rgba(14, 159, 138, 0.4);
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }

    .related-img-wrap {
        overflow: hidden;
        aspect-ratio: 16 / 9;
    }

    .related-img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }

    .related-card:hover .related-img-wrap img {
        transform: scale(1.03);
    }

    .related-body {
        padding: 20px 24px 24px;
    }

    .related-title {
        font-size: 18px;
        font-weight: 600;
        color: var(--ink);
        margin-bottom: 8px;
        line-height: 1.4;
        transition: color var(--transition);
    }

    .related-card:hover .related-title {
        color: var(--brand);
    }

    .related-desc {
        font-size: 14px;
        color: var(--text-sub);
        margin-bottom: 12px;
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .related-time {
        font-size: 13px;
        color: var(--text-placeholder);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    /* ===== Article Actions ===== */
    .article-actions {
        max-width: 900px;
        margin: 40px auto 0;
        text-align: center;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        height: 48px;
        padding: 0 28px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 500;
        border: 1px solid transparent;
        cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
        line-height: 1;
        justify-content: center;
    }

    .btn-outline {
        background: var(--surface);
        border-color: var(--border);
        color: var(--text-main);
    }

    .btn-outline:hover {
        border-color: var(--brand);
        color: var(--brand);
        background: #F9FBFB;
    }

    .btn-outline i {
        transition: transform var(--transition);
    }

    .btn-outline:hover i {
        transform: translateX(-4px);
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--surface);
        border-top: 1px solid var(--border);
        padding: 56px 0 40px;
        margin-top: auto;
    }

    .footer-inner {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
        display: grid;
        grid-template-columns: 2fr 1.5fr 1.5fr;
        gap: 48px;
    }

    .footer-brand .footer-logo {
        font-size: 20px;
        font-weight: 600;
        color: var(--ink);
        display: inline-flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }

    .footer-brand .footer-logo i {
        color: var(--brand);
    }

    .footer-brand p {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.8;
        max-width: 340px;
    }

    .footer-nav {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-nav a {
        font-size: 14px;
        color: var(--text-sub);
        transition: all var(--transition);
    }

    .footer-nav a:hover {
        color: var(--brand);
        padding-left: 4px;
    }

    .footer-meta p {
        font-size: 14px;
        color: var(--text-sub);
        margin-bottom: 8px;
    }

    .footer-social {
        display: flex;
        gap: 16px;
        margin-top: 16px;
    }

    .footer-social a {
        width: 38px;
        height: 38px;
        border: 1px solid var(--border);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-sub);
        font-size: 15px;
        transition: all var(--transition);
        background: var(--surface);
    }

    .footer-social a:hover {
        border-color: var(--brand);
        color: var(--brand);
        background: #F0F9F7;
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .app-sidebar {
            width: 72px;
        }

        .app-main {
            margin-left: 72px;
        }

        .sidebar-inner {
            padding: 20px 10px;
        }

        .sidebar-logo {
            justify-content: center;
            padding: 0;
            margin-bottom: 24px;
        }

        .logo-text {
            display: none;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }

        .nav-link {
            justify-content: center;
            padding: 0;
            height: 46px;
        }

        .nav-link i {
            margin-right: 0;
        }

        .nav-text {
            display: none;
        }

        .sidebar-foot {
            text-align: center;
            padding: 12px 4px 0;
            font-size: 11px;
        }

        .sidebar-foot p {
            white-space: nowrap;
        }

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

    @media (max-width: 768px) {
        .app-sidebar {
            width: 260px;
            transform: translateX(-100%);
            box-shadow: var(--shadow-md);
        }

        .app-sidebar.open {
            transform: translateX(0);
        }

        .app-main {
            margin-left: 0;
        }

        .sidebar-overlay {
            display: block;
        }

        .sidebar-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        .mobile-topbar {
            display: flex;
        }

        .sidebar-inner {
            padding: 20px 16px;
        }

        .sidebar-logo {
            justify-content: flex-start;
            padding: 0 8px;
        }

        .logo-text {
            display: inline;
            font-size: 17px;
        }

        .nav-link {
            justify-content: flex-start;
            padding: 0 14px;
        }

        .nav-link i {
            margin-right: 12px;
        }

        .nav-text {
            display: inline;
        }

        .sidebar-foot {
            text-align: left;
            padding: 16px 8px 0;
            font-size: 13px;
        }

        .article-banner {
            height: 200px;
        }

        .article-container {
            margin-top: -32px;
            padding-bottom: 56px;
        }

        .article-card {
            padding: 32px 24px;
            margin-bottom: 32px;
        }

        .article-meta {
            gap: 12px 20px;
        }

        .footer-inner {
            grid-template-columns: 1fr;
            gap: 32px;
            padding: 0 20px;
        }

        .footer-brand p {
            max-width: 100%;
        }
    }

    @media (max-width: 640px) {
        .container {
            padding-left: 16px;
            padding-right: 16px;
        }

        .article-title {
            font-size: 26px;
            line-height: 1.4;
        }

        .article-meta {
            flex-direction: column;
            gap: 8px;
        }

        .article-card {
            padding: 24px 16px;
            border-radius: var(--radius-sm);
        }

        .article-body h2 {
            font-size: 21px;
        }

        .article-body h3 {
            font-size: 18px;
        }

        .article-body table {
            display: block;
            overflow-x: auto;
            white-space: nowrap;
        }

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

        .related-grid {
            grid-template-columns: 1fr;
        }

        .section-title {
            font-size: 22px;
        }

        .section-head {
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
        }

        .article-actions {
            margin-top: 24px;
        }

        .btn {
            width: 100%;
        }

        .footer-inner {
            gap: 24px;
            padding: 0 16px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            animation-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }
    }

/* roulang page: category2 */
:root {
            --primary-ink: #162126;
            --brand-teal: #0E9F8A;
            --brand-teal-dark: #0B7E6D;
            --bg-snow: #F4F6F7;
            --surface-white: #FFFFFF;
            --border-ice: #AEBFC7;
            --accent-red: #E2525B;
            --text-primary: #162126;
            --text-secondary: #5B7079;
            --text-muted: #93A7AF;
            --radius-sm: 4px;
            --radius-md: 6px;
            --shadow-default: 0 1px 2px rgba(16, 32, 38, 0.04);
            --shadow-hover: 0 12px 32px rgba(16, 32, 38, 0.08);
            --transition: 0.25s ease;
            --sidebar-width: 220px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-snow);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            letter-spacing: 0.02em;
            min-height: 100vh;
        }
        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--brand-teal);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style-position: inside;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 左侧桌面导航 ========== */
        .app-shell {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #F9FBFB;
            border-right: 1px solid var(--border-ice);
            display: flex;
            flex-direction: column;
            z-index: 100;
            transition: width var(--transition);
        }
        .app-logo {
            height: 64px;
            display: flex;
            align-items: center;
            padding: 0 16px;
            border-bottom: 1px solid #E6ECEF;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand-teal);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 18px rgba(14, 159, 138, 0.35);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-ink);
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .app-nav {
            flex: 1;
            padding: 24px 12px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 44px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 15px;
            white-space: nowrap;
            position: relative;
            transition: background var(--transition), color var(--transition);
        }
        .nav-link i {
            width: 18px;
            text-align: center;
            flex-shrink: 0;
            font-size: 15px;
        }
        .nav-link:hover {
            background: #F0F3F5;
            color: var(--primary-ink);
        }
        .nav-link.active {
            background: transparent;
            color: var(--primary-ink);
            font-weight: 600;
        }
        .nav-link.active::before {
            content: "";
            position: absolute;
            left: -12px;
            top: 10px;
            bottom: 10px;
            width: 3px;
            background: var(--brand-teal);
            border-radius: 0 3px 3px 0;
        }
        .app-side-info {
            padding: 20px 16px;
            border-top: 1px solid #E6ECEF;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== 移动端顶栏 ========== */
        .mobile-topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #F9FBFB;
            border-bottom: 1px solid var(--border-ice);
            display: none;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 200;
        }
        .menu-toggle {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--primary-ink);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: #EDF1F3;
        }
        .mobile-logo {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary-ink);
        }
        .mobile-user {
            font-size: 22px;
            color: var(--text-secondary);
            padding: 4px;
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: #F9FBFB;
            border-right: 1px solid var(--border-ice);
            z-index: 300;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
            padding: 20px 16px;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            height: 40px;
        }
        .drawer-logo {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-ink);
        }
        .drawer-close {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 6px;
            border-radius: var(--radius-sm);
        }
        .drawer-close:hover {
            background: #EDF1F3;
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .drawer-nav .nav-link {
            height: 46px;
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(22, 33, 38, 0.5);
            z-index: 250;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition);
        }
        .drawer-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ========== 主内容区 ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition);
        }

        /* ========== 分类Hero条 ========== */
        .category-hero {
            position: relative;
            min-height: 240px;
            display: flex;
            align-items: center;
            background-color: var(--primary-ink);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.45;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, #101819 0%, rgba(14, 32, 36, 0.7) 60%, rgba(14, 159, 138, 0.25) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 24px;
            width: 100%;
        }
        .hero-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(174, 191, 199, 0.4);
            border-radius: 30px;
            padding: 4px 16px;
            font-size: 13px;
            color: #D6E1E5;
            margin-bottom: 16px;
        }
        .hero-chip i {
            color: var(--brand-teal);
        }
        .category-hero h1 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 600;
            color: #FFFFFF;
            line-height: 1.2;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .category-hero p {
            font-size: 16px;
            line-height: 1.7;
            color: var(--border-ice);
            max-width: 640px;
        }

        /* ========== 统计数字条 ========== */
        .stats-bar {
            background: var(--surface-white);
            border-bottom: 1px solid #E6ECEF;
            padding: 28px 0;
        }
        .stats-bar .container {
            display: flex;
            justify-content: space-around;
            gap: 20px;
            flex-wrap: wrap;
        }
        .stat-item {
            text-align: center;
            padding: 8px 12px;
        }
        .stat-num {
            display: block;
            font-size: 34px;
            font-weight: 700;
            color: var(--brand-teal);
            line-height: 1.2;
            font-family: -apple-system, "PingFang SC", sans-serif;
        }
        .stat-label {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ========== 板块公共 ========== */
        .section-heading {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-heading h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .section-heading p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-heading::after {
            content: "";
            display: block;
            width: 40px;
            height: 2px;
            background: var(--brand-teal);
            margin: 16px auto 0;
        }

        /* ========== 横向图标卡片 ========== */
        .icon-cards-section {
            padding: 80px 0;
        }
        .icon-card {
            background: var(--surface-white);
            border: 1px solid #E6ECEF;
            border-radius: var(--radius-md);
            padding: 28px 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-default);
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            height: calc(100% - 24px);
        }
        .icon-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--brand-teal);
        }
        .icon-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .icon-card-header i {
            font-size: 30px;
            color: var(--brand-teal);
            width: 44px;
            height: 44px;
            background: rgba(14, 159, 138, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .card-stage {
            font-size: 12px;
            color: var(--text-muted);
            background: #F0F3F5;
            border-radius: 20px;
            padding: 2px 12px;
            font-weight: 500;
            letter-spacing: 0.05em;
        }
        .icon-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .icon-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== 补充说明区 ========== */
        .supplement-section {
            background: var(--surface-white);
            padding: 80px 0;
            border-top: 1px solid #E6ECEF;
            border-bottom: 1px solid #E6ECEF;
        }
        .supplement-text h2 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .supplement-text p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.8;
        }
        .supplement-text ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .supplement-text ul li {
            padding: 8px 0 8px 28px;
            position: relative;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.6;
        }
        .supplement-text ul li::before {
            content: "\f35a";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--brand-teal);
            position: absolute;
            left: 0;
            top: 8px;
            font-size: 14px;
        }
        .supplement-img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-hover);
            width: 100%;
            height: 340px;
            object-fit: cover;
        }

        /* ========== CTA区块 ========== */
        .cta-block {
            background: linear-gradient(135deg, #101819 0%, #0B2A2C 60%, #0E4E48 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-block::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(14, 159, 138, 0.15);
            pointer-events: none;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-block h2 {
            font-size: 32px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .cta-block p {
            color: var(--border-ice);
            font-size: 16px;
            max-width: 480px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .primary-btn {
            background: var(--brand-teal) !important;
            border: 1px solid var(--brand-teal) !important;
            color: #FFFFFF !important;
            min-width: 170px;
            height: 48px;
            padding: 0 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: background 0.25s, transform 0.25s, box-shadow 0.25s;
        }
        .primary-btn:hover {
            background: var(--brand-teal-dark) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(14, 159, 138, 0.3);
        }
        .primary-btn i {
            margin-left: 6px;
            transition: transform 0.25s;
        }
        .primary-btn:hover i {
            transform: translateX(4px);
        }
        .secondary-btn {
            background: transparent !important;
            border: 1px solid rgba(174, 191, 199, 0.5) !important;
            color: #D6E1E5 !important;
            min-width: 170px;
            height: 48px;
            padding: 0 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            transition: background 0.25s, border-color 0.25s, color 0.25s;
        }
        .secondary-btn:hover {
            background: rgba(255, 255, 255, 0.05) !important;
            border-color: #AEBFC7 !important;
            color: #FFFFFF !important;
        }

        /* ========== FAQ区块 ========== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-section h2 {
            text-align: center;
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 48px;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid #E6ECEF;
            padding: 0 8px;
            position: relative;
            transition: background var(--transition);
        }
        .faq-item:first-child {
            border-top: 1px solid #E6ECEF;
        }
        .faq-item.expanded .faq-question {
            color: var(--brand-teal);
        }
        .faq-question {
            padding: 20px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--brand-teal);
        }
        .faq-question .faq-arrow {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition), color var(--transition);
            flex-shrink: 0;
        }
        .faq-item.expanded .faq-arrow {
            transform: rotate(180deg);
            color: var(--brand-teal);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-item.expanded .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #FFFFFF;
            border-top: 1px solid var(--border-ice);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 0.8fr;
            gap: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 12px;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-ink);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo i {
            color: var(--brand-teal);
        }
        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-nav a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-nav a:hover {
            color: var(--brand-teal);
            padding-left: 4px;
        }
        .footer-meta {
            font-size: 14px;
            color: var(--text-muted);
            text-align: right;
        }
        .footer-meta p {
            margin-bottom: 6px;
        }
        .footer-social {
            margin-top: 16px;
            display: flex;
            gap: 12px;
            justify-content: flex-end;
        }
        .footer-social a {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: #F0F3F5;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--brand-teal);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ========== 响应式断点 ========== */
        @media (max-width: 1024px) {
            .app-shell {
                width: 72px;
            }
            .app-shell .logo-text,
            .app-shell .nav-text,
            .app-shell .app-side-info {
                display: none;
            }
            .app-logo {
                justify-content: center;
                padding: 0;
            }
            .app-nav {
                padding: 24px 8px;
                align-items: center;
            }
            .nav-link {
                justify-content: center;
                padding: 0;
                height: 44px;
                width: 44px;
            }
            .nav-link.active::before {
                left: -8px;
            }
            .main-content {
                margin-left: 72px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-meta {
                text-align: left;
            }
            .footer-social {
                justify-content: flex-start;
            }
        }
        @media (max-width: 768px) {
            .app-shell {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .category-hero {
                min-height: 200px;
            }
            .hero-content {
                padding: 28px 20px;
            }
            .stats-bar .container {
                justify-content: center;
            }
            .stat-num {
                font-size: 28px;
            }
            .icon-cards-section,
            .supplement-section,
            .faq-section,
            .cta-block {
                padding: 56px 0;
            }
            .section-heading {
                margin-bottom: 32px;
            }
            .supplement-img {
                height: 260px;
                margin-top: 24px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-brand p {
                margin: 12px auto 0;
            }
            .footer-nav {
                align-items: center;
            }
            .footer-meta {
                text-align: center;
            }
            .footer-social {
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-chip {
                font-size: 12px;
            }
            .stat-item {
                flex: 1 1 30%;
                min-width: 80px;
            }
            .stat-num {
                font-size: 24px;
            }
            .stat-label {
                font-size: 12px;
            }
            .icon-card {
                padding: 22px 18px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .primary-btn,
            .secondary-btn {
                width: 100%;
                max-width: 260px;
            }
            .faq-question {
                font-size: 15px;
            }
        }

/* roulang page: category3 */
:root {
    --ink: #162126;
    --brand: #0E9F8A;
    --bg: #F4F6F7;
    --surface: #FFFFFF;
    --silver: #AEBFC7;
    --red: #E2525B;
    --text-main: #162126;
    --text-sub: #5B7079;
    --text-muted: #93A7AF;
    --radius-card: 6px;
    --radius-btn: 4px;
    --shadow-sm: 0 1px 2px rgba(16, 32, 38, 0.04);
    --shadow-md: 0 12px 32px rgba(16, 32, 38, 0.08);
    --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: var(--font-sans); }
body { background: var(--bg); color: var(--text-main); line-height: 1.8; letter-spacing: 0.02em; font-size: 16px; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container-custom { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-header { max-width: 1200px; margin: 0 auto 48px; padding: 0 24px; }
.section-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; color: var(--brand); text-transform: uppercase; margin-bottom: 12px; }
.section-title { font-size: 26px; font-weight: 600; color: var(--text-main); line-height: 1.4; margin: 0 0 8px; }
.section-line { width: 40px; height: 2px; background: var(--brand); margin-top: 16px; }
.section-sub { font-size: 15px; color: var(--text-sub); max-width: 560px; line-height: 1.7; margin-top: 8px; }

/* App Shell ===================== */
.app-shell { min-height: 100vh; display: flex; }
.app-sidebar { width: 220px; background: #F9FBFB; border-right: 1px solid var(--silver); position: fixed; top: 0; left: 0; height: 100vh; display: flex; flex-direction: column; z-index: 1000; transition: transform 0.3s ease, width 0.3s ease; }
.sidebar-logo { height: 56px; display: flex; align-items: center; gap: 10px; padding: 0 20px; border-bottom: 1px solid #E6ECEF; flex-shrink: 0; }
.logo-icon { width: 28px; height: 28px; border-radius: 50%; background: var(--brand); position: relative; flex-shrink: 0; }
.logo-icon::after { content: ""; position: absolute; width: 8px; height: 8px; background: #fff; border-radius: 50%; top: 6px; left: 6px; box-shadow: 10px 6px 0 -2px #fff; }
.logo-text { font-size: 16px; font-weight: 600; color: var(--text-main); white-space: nowrap; }
.app-nav { flex: 1; padding: 24px 12px; display: flex; flex-direction: column; gap: 6px; }
.nav-link { display: flex; align-items: center; gap: 12px; height: 44px; padding: 0 14px; border-radius: var(--radius-btn); color: var(--text-sub); font-size: 15px; font-weight: 500; position: relative; transition: all 0.25s ease; }
.nav-link i { width: 18px; text-align: center; font-size: 16px; flex-shrink: 0; }
.nav-link:hover { background: #F0F3F5; color: var(--text-main); }
.nav-link.active { background: #EDF5F3; color: var(--ink); }
.nav-link.active::before { content: ""; position: absolute; left: -12px; top: 10px; width: 3px; height: 24px; background: var(--brand); border-radius: 0 3px 3px 0; }
.sidebar-foot { padding: 20px; border-top: 1px solid #E6ECEF; font-size: 13px; color: var(--text-muted); line-height: 1.6; flex-shrink: 0; }
.nav-scrim { display: none; }
.app-main { flex: 1; margin-left: 220px; min-width: 0; }
.mobile-topbar { display: none; }

/* Hero ===================== */
.page-hero { position: relative; height: 240px; background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat; display: flex; align-items: flex-end; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(22,33,38,0.88) 0%, rgba(14,32,38,0.72) 45%, rgba(14,159,138,0.28) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 1200px; width: 100%; margin: 0 auto; padding: 0 24px 36px; }
.hero-badge { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.12em; color: #fff; background: rgba(14,159,138,0.25); border: 1px solid rgba(14,159,138,0.6); border-radius: 20px; padding: 4px 14px; margin-bottom: 14px; text-transform: uppercase; }
.page-hero h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 600; color: #fff; margin: 0 0 10px; line-height: 1.3; }
.page-hero .hero-subtitle { font-size: 15px; color: var(--silver); max-width: 640px; line-height: 1.7; margin: 0; }

/* Timeline ===================== */
.timeline-section { padding: 96px 0 80px; background: var(--bg); }
.timeline { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--silver); transform: translateX(-50%); }
.timeline-item { display: flex; width: 50%; position: relative; padding-right: 48px; margin-bottom: 40px; }
.timeline-item:nth-child(odd) { align-self: flex-start; }
.timeline-item:nth-child(even) { margin-left: 50%; padding-right: 0; padding-left: 48px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot { position: absolute; top: 28px; width: 12px; height: 12px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 4px rgba(14,159,138,0.22); z-index: 2; }
.timeline-item:nth-child(odd) .timeline-dot { right: -6px; }
.timeline-item:nth-child(even) .timeline-dot { left: -6px; }
.timeline-card { background: var(--surface); border: 1px solid #E6ECEF; border-radius: var(--radius-card); padding: 20px 24px; box-shadow: var(--shadow-sm); transition: box-shadow 0.25s ease, transform 0.25s ease; }
.timeline-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.step-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; color: var(--brand); margin-bottom: 8px; }
.timeline-card h3 { font-size: 18px; font-weight: 600; margin: 0 0 8px; color: var(--text-main); }
.timeline-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin: 0; }
.step-badge { display: inline-block; font-size: 12px; font-weight: 500; color: var(--red); background: rgba(226,82,91,0.08); border: 1px solid rgba(226,82,91,0.3); border-radius: 4px; padding: 2px 10px; margin-top: 12px; }
.step-badge.done { color: var(--brand); background: rgba(14,159,138,0.08); border-color: rgba(14,159,138,0.3); }

/* Matrix table ===================== */
.matrix-section { padding: 80px 0; background: var(--surface); border-top: 1px solid #E6ECEF; border-bottom: 1px solid #E6ECEF; }
.table-wrap { max-width: 1200px; margin: 0 auto 40px; padding: 0 24px; overflow-x: auto; }
.table-wrap:last-child { margin-bottom: 0; }
.table-caption { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.table-caption::before { content: ""; width: 4px; height: 18px; background: var(--brand); border-radius: 2px; }
.matrix-table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid #E6ECEF; border-radius: var(--radius-card); font-size: 14px; min-width: 720px; }
.matrix-table thead th { background: var(--ink); color: #fff; padding: 16px 24px; text-align: left; font-weight: 600; white-space: nowrap; }
.matrix-table tbody td { padding: 16px 24px; border-bottom: 1px solid #E6ECEF; color: var(--text-main); }
.matrix-table tbody tr:last-child td { border-bottom: none; }
.matrix-table tbody tr:nth-child(even) td { background: #FAFCFC; }
.matrix-table tbody tr:hover td { background: #F0F5F4; }
.status-table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid #E6ECEF; border-radius: var(--radius-card); font-size: 14px; min-width: 720px; }
.status-table thead th { background: #EFF4F3; color: var(--text-main); padding: 14px 20px; text-align: left; font-weight: 600; border-bottom: 2px solid var(--brand); }
.status-table tbody td { padding: 16px 20px; border-bottom: 1px solid #E6ECEF; color: var(--text-sub); }
.status-table tbody tr:last-child td { border-bottom: none; }
.status-table tbody tr:hover td { background: #FAFCFC; }
.table-note { max-width: 1200px; margin: 16px auto 0; padding: 0 24px; font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* Tips ===================== */
.tips-section { padding: 96px 0; background: var(--bg); }
.tips-grid { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tip-card { background: var(--surface); border: 1px solid #E6ECEF; border-radius: var(--radius-card); padding: 32px 28px; box-shadow: var(--shadow-sm); transition: box-shadow 0.25s ease, transform 0.25s ease; }
.tip-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.tip-icon { width: 48px; height: 48px; border-radius: var(--radius-btn); background: rgba(14,159,138,0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--brand); font-size: 20px; }
.tip-card h3 { font-size: 18px; font-weight: 600; margin: 0 0 10px; color: var(--text-main); }
.tip-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin: 0; }

/* FAQ ===================== */
.faq-section { padding: 96px 0; background: var(--surface); }
.faq-list { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.faq-list .accordion { background: transparent; margin: 0; list-style: none; }
.faq-item { background: transparent; border: 0; border-bottom: 1px solid var(--silver); border-radius: 0 !important; margin-bottom: 0 !important; padding: 0; position: relative; }
.faq-item::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--brand); opacity: 0; transition: opacity 0.25s ease; }
.faq-item.is-active::before { opacity: 1; }
.faq-item .accordion-title { background: transparent !important; border: 0 !important; padding: 20px 8px 20px 20px; font-size: 16px; font-weight: 600; color: var(--text-main); line-height: 1.6; border-radius: 0 !important; position: relative; }
.faq-item .accordion-title::after { content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; right: 8px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 14px; transition: transform 0.3s ease; }
.faq-item.is-active .accordion-title { color: var(--brand); }
.faq-item.is-active .accordion-title::after { transform: translateY(-50%) rotate(180deg); color: var(--brand); }
.faq-item .accordion-content { background: transparent !important; border: 0 !important; padding: 0 8px 24px 20px; font-size: 14px; color: var(--text-sub); line-height: 1.8; }

/* CTA ===================== */
.cta-banner { padding: 48px 0; background: var(--ink); }
.cta-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-copy h2 { font-size: 24px; font-weight: 600; color: #fff; margin: 0 0 8px; }
.cta-copy p { font-size: 15px; color: var(--silver); margin: 0; line-height: 1.7; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 28px; border-radius: var(--radius-btn); font-size: 15px; font-weight: 600; cursor: pointer; transition: all 0.25s ease; border: 1px solid transparent; }
.btn i { transition: transform 0.25s ease; }
.btn-primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: #0B8372; color: #fff; box-shadow: 0 8px 24px rgba(14,159,138,0.35); }
.btn-primary:hover i { transform: translateX(4px); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.06); border-color: #fff; color: #fff; }

/* Footer ===================== */
.site-footer { background: #fff; border-top: 1px solid var(--silver); padding: 56px 0 32px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; }
.footer-brand .footer-logo { font-size: 18px; font-weight: 600; color: var(--text-main); }
.footer-brand p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin: 12px 0 0; max-width: 320px; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { font-size: 14px; color: var(--text-sub); }
.footer-nav a:hover { color: var(--brand); }
.footer-meta p { font-size: 13px; color: var(--text-muted); margin: 0 0 6px; line-height: 1.7; }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; background: #F0F3F5; display: flex; align-items: center; justify-content: center; color: var(--text-sub); font-size: 15px; transition: all 0.25s ease; }
.footer-social a:hover { background: var(--brand); color: #fff; }

/* Responsive ===================== */
@media (max-width: 1024px) {
    .app-sidebar { width: 72px; }
    .app-sidebar .logo-text { display: none; }
    .app-sidebar .sidebar-logo { justify-content: center; padding: 0; }
    .app-sidebar .nav-link { justify-content: center; padding: 0; }
    .app-sidebar .nav-link span { display: none; }
    .app-sidebar .nav-link.active::before { left: -12px; }
    .sidebar-foot { display: none; }
    .app-main { margin-left: 72px; }
    .timeline::before { left: 24px; transform: none; }
    .timeline-item, .timeline-item:nth-child(even) { width: 100%; margin-left: 0; padding-left: 56px; padding-right: 0; }
    .timeline-item:nth-child(odd) .timeline-dot, .timeline-item:nth-child(even) .timeline-dot { left: 18px; right: auto; }
    .tips-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}
@media (max-width: 768px) {
    .app-sidebar { width: 260px; transform: translateX(-100%); box-shadow: 4px 0 24px rgba(16,32,38,0.08); }
    .app-sidebar.open { transform: translateX(0); }
    .app-sidebar .logo-text { display: block; }
    .app-sidebar .sidebar-logo { justify-content: flex-start; padding: 0 20px; }
    .app-sidebar .nav-link { justify-content: flex-start; padding: 0 14px; }
    .app-sidebar .nav-link span { display: inline; }
    .sidebar-foot { display: block; }
    .app-main { margin-left: 0; }
    .mobile-topbar { display: flex; align-items: center; justify-content: space-between; height: 56px; background: #F9FBFB; border-bottom: 1px solid var(--silver); padding: 0 16px; position: sticky; top: 0; z-index: 900; }
    .nav-toggle { background: transparent; border: 0; font-size: 20px; color: var(--text-main); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-btn); cursor: pointer; }
    .nav-toggle:hover { background: #F0F3F5; }
    .mobile-logo { font-size: 16px; font-weight: 600; color: var(--text-main); }
    .mobile-action { font-size: 18px; color: var(--brand); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-btn); }
    .nav-scrim { display: block; position: fixed; inset: 0; background: rgba(22,33,38,0.4); z-index: 999; opacity: 0; visibility: hidden; transition: opacity 0.3s ease; }
    .nav-scrim.show { opacity: 1; visibility: visible; }
    .page-hero { height: 210px; }
    .page-hero h1 { font-size: 28px; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .faq-item .accordion-title { font-size: 15px; }
}
@media (max-width: 640px) {
    .container-custom, .section-header, .timeline, .table-wrap, .faq-list, .cta-inner, .footer-inner { padding-left: 20px; padding-right: 20px; }
    .timeline-section { padding: 56px 0; }
    .matrix-section { padding: 56px 0; }
    .tips-section { padding: 56px 0; }
    .faq-section { padding: 56px 0; }
    .tips-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 22px; }
    .timeline-item, .timeline-item:nth-child(even) { padding-left: 48px; }
    .timeline-card { padding: 16px 18px; }
    .timeline-card h3 { font-size: 16px; }
    .timeline-card p { font-size: 13px; }
    .cta-actions { width: 100%; flex-direction: column; }
    .btn { width: 100%; }
    .table-wrap { padding-left: 0; padding-right: 0; }
    .table-wrap table { min-width: 640px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* roulang page: category4 */
:root {
            --primary-dark: #162126;
            --primary-green: #0E9F8A;
            --bg-gray: #F4F6F7;
            --surface-white: #FFFFFF;
            --border-silver: #AEBFC7;
            --line-silver: #E6ECEF;
            --danger-red: #E2525B;
            --text-primary: #162126;
            --text-secondary: #5B7079;
            --text-placeholder: #93A7AF;
            --radius-sm: 4px;
            --radius-md: 6px;
            --shadow-sm: 0 1px 2px rgba(16, 32, 38, 0.04);
            --shadow-hover: 0 12px 32px rgba(16, 32, 38, 0.08);
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            background: var(--bg-gray);
            margin: 0;
            padding: 0;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .app-sidebar {
            width: 220px;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--surface-white);
            border-right: 1px solid var(--line-silver);
            padding: 24px 16px 16px;
            display: flex;
            flex-direction: column;
            z-index: 40;
            transition: width var(--transition);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 8px 20px;
            height: 56px;
            border-bottom: 1px solid var(--line-silver);
            margin-bottom: 16px;
        }

        .sidebar-logo i {
            font-size: 28px;
            color: var(--primary-green);
        }

        .sidebar-logo span {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .app-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 14px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .nav-link:hover {
            background: #F0F3F5;
            color: var(--text-primary);
        }

        .nav-link.active {
            background: rgba(14, 159, 138, 0.08);
            color: var(--text-primary);
            font-weight: 600;
        }

        .nav-link.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 3px;
            border-radius: 0 3px 3px 0;
            background: var(--primary-green);
        }

        .sidebar-bottom {
            border-top: 1px solid var(--line-silver);
            padding-top: 16px;
            font-size: 13px;
            color: var(--text-placeholder);
            line-height: 1.6;
        }

        .sidebar-bottom p {
            margin: 0 0 4px;
        }

        .main-content {
            flex: 1;
            margin-left: 220px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition);
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--surface-white);
            border-bottom: 1px solid var(--line-silver);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 50;
        }

        .mobile-header .menu-toggle {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .mobile-header .mobile-logo {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .mobile-header .mobile-icon {
            font-size: 16px;
            color: var(--text-secondary);
            padding: 8px;
        }

        .mobile-menu-reveal .mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 16px 8px;
        }

        .mobile-menu-reveal .nav-link {
            color: var(--text-secondary);
        }

        .mobile-menu-reveal .nav-link.active {
            background: rgba(14, 159, 138, 0.08);
            color: var(--primary-dark);
        }

        .mobile-menu-reveal .mobile-nav-logo {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
            padding: 12px 8px 8px;
            border-bottom: 1px solid var(--line-silver);
            margin-bottom: 8px;
        }

        .mobile-menu-reveal .mobile-nav-logo i {
            color: var(--primary-green);
            margin-right: 8px;
        }

        .category-hero {
            position: relative;
            min-height: 240px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(18, 26, 30, 0.88), rgba(14, 30, 36, 0.72)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
            padding: 48px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .category-hero .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
        }

        .category-hero h1 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 600;
            margin: 0 0 12px;
            letter-spacing: 0.02em;
        }

        .category-hero p {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(220, 230, 235, 0.9);
            max-width: 560px;
            margin: 0;
        }

        .category-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(14, 159, 138, 0.2);
            border: 1px solid rgba(14, 159, 138, 0.5);
            color: #7ce0d0;
            font-size: 13px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .section {
            padding: 72px 0;
        }

        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .section-header .sec-tag {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-green);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }

        .section-header .sec-line {
            width: 40px;
            height: 2px;
            background: var(--primary-green);
            margin: 0;
            border: none;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 15px;
            margin: 12px 0 0;
            max-width: 640px;
        }

        .benefit-overview {
            background: var(--surface-white);
            border-bottom: 1px solid var(--line-silver);
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .overview-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .overview-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .overview-image:hover img {
            transform: scale(1.03);
        }

        .overview-content h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
        }

        .overview-content p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .overview-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .overview-list li {
            position: relative;
            padding-left: 28px;
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .overview-list li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--primary-green);
            font-size: 16px;
        }

        .pricing-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .pricing-card {
            background: var(--bg-gray);
            border: 1px solid var(--line-silver);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }

        .pricing-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary-green);
        }

        .pricing-card.recommended {
            border-color: var(--danger-red);
            background: linear-gradient(180deg, rgba(226, 82, 91, 0.04), rgba(255, 255, 255, 0.98) 40%);
        }

        .pricing-card .rec-badge {
            position: absolute;
            top: -10px;
            right: 16px;
            background: var(--danger-red);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }

        .pricing-card .tier-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .pricing-card .tier-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            min-height: 44px;
        }

        .pricing-card .tier-points {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .pricing-card .tier-points li {
            font-size: 14px;
            color: var(--text-primary);
            padding: 4px 0;
            border-bottom: 1px dashed var(--line-silver);
            line-height: 1.5;
        }

        .pricing-card .tier-points li:last-child {
            border-bottom: none;
        }

        .pricing-card .btn {
            width: 100%;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 44px;
            padding: 0 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            text-align: center;
            justify-content: center;
        }

        .btn i {
            transition: transform var(--transition);
        }

        .btn:hover i {
            transform: translateX(4px);
        }

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

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

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-silver);
        }

        .btn-outline:hover {
            background: #F0F3F5;
            border-color: var(--primary-dark);
            color: var(--text-primary);
        }

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

        .accordion {
            background: transparent;
            margin: 0;
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--surface-white);
            border: 1px solid var(--line-silver);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            transition: box-shadow var(--transition), border-color var(--transition);
            position: relative;
        }

        .accordion-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border-silver);
        }

        .accordion-item.is-active {
            border-color: var(--primary-green);
            box-shadow: var(--shadow-sm);
        }

        .accordion-item .accordion-title {
            background: transparent;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 20px 20px 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
            margin: 0;
        }

        .accordion-item .accordion-title:hover {
            background: #F8FAFA;
        }

        .accordion-item.is-active .accordion-title {
            color: var(--primary-green);
        }

        .accordion-item.is-active .accordion-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 16px;
            bottom: 16px;
            width: 3px;
            border-radius: 0 3px 3px 0;
            background: var(--primary-green);
        }

        .accordion-title::after {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: '\f078';
            color: var(--text-placeholder);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
            color: var(--primary-green);
        }

        .accordion-content {
            background: transparent;
            border: none;
            padding: 0 24px 20px 48px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .accordion-content p {
            margin: 0 0 12px;
        }

        .contact-section {
            background: var(--surface-white);
        }

        .contact-wrap {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: start;
        }

        .contact-header h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 12px;
        }

        .contact-header p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            max-width: 480px;
        }

        .contact-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 32px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group.full {
            grid-column: 1 / -1;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            height: 44px;
            padding: 0 12px;
            border: 1px solid var(--border-silver);
            border-radius: var(--radius-sm);
            background: var(--surface-white);
            color: var(--text-primary);
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }

        .form-group textarea {
            height: auto;
            min-height: 100px;
            padding: 12px;
            line-height: 1.6;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary-green);
            box-shadow: 0 0 0 4px rgba(14, 159, 138, 0.15);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-placeholder);
        }

        .submit-btn {
            grid-column: 1 / -1;
            height: 48px;
            background: var(--primary-green);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .submit-btn:hover {
            background: #0c8574;
            box-shadow: 0 4px 16px rgba(14, 159, 138, 0.3);
        }

        .submit-btn i {
            transition: transform var(--transition);
        }

        .submit-btn:hover i {
            transform: translateX(4px);
        }

        .contact-info {
            background: var(--bg-gray);
            border: 1px solid var(--line-silver);
            border-radius: var(--radius-md);
            padding: 32px;
        }

        .contact-info h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
        }

        .contact-info .info-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--line-silver);
        }

        .contact-info .info-item:last-child {
            border-bottom: none;
        }

        .contact-info .info-item i {
            width: 20px;
            text-align: center;
            color: var(--primary-green);
            font-size: 16px;
            margin-top: 2px;
        }

        .contact-info .info-item span {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .contact-info .info-item strong {
            color: var(--text-primary);
            font-weight: 500;
            display: block;
        }

        .contact-info .info-note {
            margin-top: 16px;
            padding: 12px 16px;
            background: rgba(14, 159, 138, 0.08);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .back-links {
            display: flex;
            gap: 16px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .back-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .back-links a:hover {
            color: var(--primary-green);
        }

        .site-footer {
            background: var(--surface-white);
            border-top: 1px solid var(--line-silver);
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .footer-inner {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr;
            gap: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo i {
            color: var(--primary-green);
            font-size: 24px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-nav a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-nav a:hover {
            color: var(--primary-green);
        }

        .footer-meta p {
            font-size: 14px;
            color: var(--text-placeholder);
            margin: 0 0 8px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--line-silver);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .footer-social a:hover {
            border-color: var(--primary-green);
            color: var(--primary-green);
            background: rgba(14, 159, 138, 0.06);
        }

        .reveal-override {
            border: none;
            border-radius: 8px;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.2);
            padding: 24px;
        }

        .reveal-override .close-button {
            color: var(--text-secondary);
        }

        @media (max-width: 1024px) {
            .app-sidebar {
                width: 72px;
                padding: 24px 8px;
            }
            .nav-text {
                display: none;
            }
            .sidebar-logo {
                padding: 0 4px 20px;
                justify-content: center;
            }
            .sidebar-logo span {
                display: none;
            }
            .nav-link {
                justify-content: center;
                padding: 0 8px;
            }
            .nav-link i {
                margin: 0;
            }
            .main-content {
                margin-left: 72px;
            }
            .sidebar-bottom p {
                text-align: center;
                font-size: 11px;
            }
        }

        @media (max-width: 768px) {
            .app-sidebar {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                padding-top: 56px;
            }
            .overview-grid,
            .contact-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .overview-image img {
                height: 220px;
            }
            .section {
                padding: 56px 0;
            }
            .pricing-row {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 32px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .contact-form {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .accordion-content {
                padding-left: 24px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .contact-info {
                padding: 24px;
            }
            .btn {
                width: 100%;
            }
            .category-hero {
                min-height: 200px;
                padding: 32px 0;
            }
            .overview-content h2 {
                font-size: 22px;
            }
            .footer-inner {
                padding: 0 16px;
            }
        }

        .backpic-disc {
            font-size: 13px;
            color: var(--text-placeholder);
            line-height: 1.5;
            margin-top: 8px;
        }

        img.cover-float {
            width: 100%;
            border-radius: var(--radius-md);
        }