/* roulang page: index */
:root {
  --primary: #1e56a0;
  --primary-dark: #143671;
  --primary-light: #e8f0fe;
  --primary-gradient: linear-gradient(135deg, #1e56a0 0%, #2b7be0 100%);
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-card: #1e293b;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #ffffff;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 48px rgba(0,0,0,0.12);
  --shadow-sidebar: 4px 0 30px rgba(0,0,0,0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 240px;
  --header-height: 0px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
button { cursor: pointer; background: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.1rem; color: var(--text-light); max-width: 640px; line-height: 1.6; }
.section-dark .section-subtitle { color: var(--text-muted); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .section-subtitle { margin: 0 auto; }
/* ===== 布局：左侧导航 + 主内容 ===== */
.app-layout { display: flex; min-height: 100vh; }
.sidebar { position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh; background: var(--bg-dark); color: var(--text-white); z-index: 1000; display: flex; flex-direction: column; padding: 0; overflow-y: auto; border-right: 1px solid rgba(255,255,255,0.06); transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1); }
.sidebar-brand { padding: 28px 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-logo { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.03em; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: inline-block; }
.sidebar-logo-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; font-weight: 400; letter-spacing: 0.3px; -webkit-text-fill-color: var(--text-muted); }
.sidebar-nav { flex: 1; padding: 16px 12px; }
.sidebar-nav li { margin-bottom: 4px; }
.sidebar-nav a { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--radius-sm); color: rgba(255,255,255,0.7); font-weight: 500; font-size: 0.95rem; transition: var(--transition); }
.sidebar-nav a i { width: 20px; text-align: center; font-size: 1.1rem; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: var(--text-white); }
.sidebar-nav a.active { background: var(--primary); color: var(--text-white); box-shadow: 0 4px 16px rgba(30,86,160,0.4); }
.sidebar-footer { padding: 16px 24px 24px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.8rem; color: var(--text-muted); text-align: center; }
.main-content { flex: 1; margin-left: var(--sidebar-width); min-height: 100vh; }
/* ===== 移动端导航 ===== */
.mobile-header { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 60px; background: var(--bg-dark); z-index: 999; padding: 0 20px; align-items: center; justify-content: space-between; box-shadow: 0 2px 20px rgba(0,0,0,0.15); }
.mobile-header .sidebar-logo { font-size: 1.3rem; }
.mobile-menu-btn { color: var(--text-white); font-size: 1.4rem; padding: 8px; border-radius: var(--radius-sm); transition: var(--transition); }
.mobile-menu-btn:hover { background: rgba(255,255,255,0.1); }
.sidebar-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; transition: opacity 0.3s ease; }
/* ===== Hero ===== */
.hero { position: relative; padding: 100px 0 80px; background: var(--bg-dark); overflow: hidden; min-height: 520px; display: flex; align-items: center; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.25; z-index: 0; }
.hero-bg-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.7) 100%); z-index: 1; }
.hero-content { position: relative; z-index: 2; max-width: 700px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.1); backdrop-filter: blur(8px); padding: 6px 16px 6px 12px; border-radius: 100px; font-size: 0.85rem; color: var(--accent); margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.12); }
.hero-badge i { font-size: 0.75rem; }
.hero-title { font-size: 3.2rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.03em; color: var(--text-white); margin-bottom: 20px; }
.hero-title span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 1.15rem; color: var(--text-muted); line-height: 1.7; max-width: 560px; margin-bottom: 36px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px; border-radius: 100px; font-weight: 600; font-size: 1rem; transition: var(--transition); border: none; cursor: pointer; }
.btn-primary { background: var(--primary-gradient); color: var(--text-white); box-shadow: 0 4px 20px rgba(30,86,160,0.35); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(30,86,160,0.45); }
.btn-outline { background: transparent; color: var(--text-white); border: 2px solid rgba(255,255,255,0.25); }
.btn-outline:hover { border-color: var(--primary); background: rgba(30,86,160,0.15); transform: translateY(-3px); }
.btn-light { background: var(--text-white); color: var(--primary-dark); }
.btn-light:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(0,0,0,0.15); }
/* ===== 卡片网格 ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); overflow: hidden; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.card-body { padding: 28px; }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.card-text { color: var(--text-light); font-size: 0.92rem; line-height: 1.6; }
.card-tag { display: inline-block; padding: 4px 12px; border-radius: 100px; font-size: 0.78rem; font-weight: 500; background: var(--primary-light); color: var(--primary); margin-bottom: 12px; }
.card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-muted); margin-top: 12px; }
/* ===== 特色卡片 ===== */
.feature-card { text-align: center; padding: 36px 24px; }
.feature-icon { width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: var(--text-white); background: var(--primary-gradient); box-shadow: 0 8px 24px rgba(30,86,160,0.25); }
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-light); font-size: 0.92rem; line-height: 1.6; }
/* ===== 统计数字 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; padding: 32px 16px; background: rgba(255,255,255,0.05); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); }
.stat-num { font-size: 2.8rem; font-weight: 800; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; margin-bottom: 4px; }
.stat-label { font-size: 0.95rem; color: var(--text-muted); }
/* ===== 流程步骤 ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step-item { text-align: center; position: relative; padding: 32px 16px; }
.step-num { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.2rem; font-weight: 700; background: var(--primary-light); color: var(--primary); position: relative; z-index: 2; }
.step-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step-item p { font-size: 0.9rem; color: var(--text-light); line-height: 1.5; }
.step-line { display: none; }
/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
.faq-question { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 1.05rem; cursor: pointer; padding: 4px 0; transition: var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question i { font-size: 0.9rem; transition: transform 0.3s ease; color: var(--text-light); }
.faq-question.open i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; color: var(--text-light); line-height: 1.7; font-size: 0.95rem; }
.faq-answer.open { max-height: 400px; padding-top: 12px; }
/* ===== CTA ===== */
.cta-box { background: var(--primary-gradient); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; color: var(--text-white); position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.1; z-index: 0; }
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-box p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 28px; max-width: 520px; margin-left: auto; margin-right: auto; }
/* ===== 内容列表 (CMS) ===== */
.cms-list .card { display: flex; flex-direction: column; }
.cms-list .card-img { width: 100%; aspect-ratio: 16/9; }
.cms-list .card-body { flex: 1; display: flex; flex-direction: column; }
.cms-list .card-body .card-text { flex: 1; }
/* ===== 分类入口 ===== */
.cat-card { position: relative; border-radius: var(--radius); overflow: hidden; height: 220px; display: flex; align-items: flex-end; cursor: pointer; transition: var(--transition); }
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.cat-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.cat-card:hover img { transform: scale(1.05); }
.cat-card-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.2) 100%); z-index: 1; }
.cat-card-content { position: relative; z-index: 2; padding: 24px; width: 100%; }
.cat-card-content h3 { color: var(--text-white); font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
.cat-card-content p { color: rgba(255,255,255,0.7); font-size: 0.85rem; }
/* ===== 页脚 ===== */
.site-footer { background: var(--bg-dark); color: var(--text-muted); padding: 48px 0 32px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .sidebar-logo { font-size: 1.4rem; margin-bottom: 12px; display: inline-block; }
.footer-brand p { font-size: 0.9rem; line-height: 1.6; max-width: 320px; margin-top: 8px; }
.footer-col h4 { color: var(--text-white); font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 0.88rem; color: var(--text-muted); transition: var(--transition); }
.footer-col ul a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; }
.footer-bottom a { color: var(--primary); }
/* ===== 页面 Banner（内页） ===== */
.page-banner { position: relative; padding: 60px 0 56px; background: var(--bg-dark); overflow: hidden; }
.page-banner-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.2; z-index: 0; }
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: 2.2rem; font-weight: 800; color: var(--text-white); margin-bottom: 8px; }
.page-banner p { color: var(--text-muted); font-size: 1rem; max-width: 600px; }
.page-banner .breadcrumb { display: flex; gap: 8px; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 12px; }
.page-banner .breadcrumb a { color: var(--text-muted); }
.page-banner .breadcrumb a:hover { color: var(--primary); }
.page-banner .breadcrumb span { color: var(--text-white); }
/* ===== 文章正文 ===== */
.article-content { font-size: 1.05rem; line-height: 1.85; color: var(--text); }
.article-content p { margin-bottom: 1.2em; }
.article-content h2 { font-size: 1.5rem; font-weight: 700; margin: 1.8em 0 0.6em; }
.article-content h3 { font-size: 1.2rem; font-weight: 700; margin: 1.4em 0 0.5em; }
.article-content ul, .article-content ol { margin: 1em 0; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 0.4em; }
.article-content ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-content img { border-radius: var(--radius-sm); margin: 1.5em 0; }
.article-content blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; margin: 1.5em 0; background: var(--bg-alt); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-light); }
.article-content a { color: var(--primary); text-decoration: underline; }
.article-content a:hover { color: var(--primary-dark); }
/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-light); }
.empty-state i { font-size: 3rem; color: var(--border); margin-bottom: 16px; }
.empty-state p { font-size: 1rem; }
/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 2.6rem; }
  .section { padding: 64px 0; }
  .cta-box { padding: 48px 32px; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; opacity: 1; }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; padding-top: 60px; }
  .app-layout { padding-top: 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 80px 0 60px; min-height: auto; }
  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section-title { font-size: 1.6rem; }
  .section-subtitle { font-size: 0.95rem; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 1.5rem; }
  .page-banner h1 { font-size: 1.6rem; }
  .stat-num { font-size: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cat-card { height: 180px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.7rem; }
  .section { padding: 48px 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-item { padding: 20px 12px; }
  .steps { grid-template-columns: 1fr; }
  .step-item { padding: 20px 12px; }
  .card-body { padding: 20px; }
  .feature-card { padding: 24px 16px; }
  .hero-badge { font-size: 0.75rem; padding: 4px 12px 4px 8px; }
}

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-gray: #f1f5f9;
  --bg-dark: #0f172a;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.25s ease;
  --sidebar-width: 220px;
  --header-h: 64px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-body);
  display: flex;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform var(--transition);
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 20px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.3px;
}
.sidebar-logo i { font-size: 22px; color: var(--primary); }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.sidebar-nav ul { display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav li { }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
  transition: all var(--transition);
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; color: var(--text-muted); transition: color var(--transition); }
.sidebar-nav a:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-nav a:hover i { color: var(--primary); }
.sidebar-nav a.active { background: var(--primary); color: var(--text-white); }
.sidebar-nav a.active i { color: var(--text-white); }

/* ===== Main Content ===== */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 56px 0 48px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.article-hero .container { position: relative; z-index: 1; }
.article-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
}
.article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
.article-hero .breadcrumb a:hover { color: #fff; }
.article-hero .breadcrumb .sep { color: rgba(255,255,255,0.3); }
.article-hero .breadcrumb .current { color: var(--accent); }
.article-hero h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.25;
  max-width: 800px;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.article-hero .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
}
.article-hero .meta .tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(255,255,255,0.12);
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}
.article-hero .meta i { margin-right: 4px; }

/* ===== Article Body ===== */
.article-section { padding: 48px 0 64px; }
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}
.article-content { }
.article-content .content-body {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-primary);
}
.article-content .content-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text-primary);
  line-height: 1.3;
}
.article-content .content-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}
.article-content .content-body p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}
.article-content .content-body ul, 
.article-content .content-body ol {
  margin: 12px 0 20px;
  padding-left: 24px;
  color: var(--text-secondary);
}
.article-content .content-body ul { list-style: disc; }
.article-content .content-body ol { list-style: decimal; }
.article-content .content-body li { margin-bottom: 8px; }
.article-content .content-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-content .content-body img {
  border-radius: var(--radius-sm);
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}
.article-content .content-body a { font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
.article-content .content-body code {
  background: var(--bg-gray);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--primary-dark);
}

/* ===== Sidebar (Article) ===== */
.article-sidebar { }
.sidebar-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.sidebar-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}
.sidebar-card .related-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-card .related-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}
.sidebar-card .related-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-card .related-item img {
  width: 72px;
  height: 52px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
  background: var(--bg-gray);
}
.sidebar-card .related-item .info { flex: 1; }
.sidebar-card .related-item .info a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}
.sidebar-card .related-item .info a:hover { color: var(--primary); }
.sidebar-card .related-item .info .date {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}
.sidebar-card .cta-box {
  text-align: center;
}
.sidebar-card .cta-box p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.sidebar-card .btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
}
.sidebar-card .btn-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); color: #fff; }

/* ===== Article Nav ===== */
.article-nav {
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.article-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  flex: 1;
  max-width: 48%;
}
.article-nav a:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.article-nav a .dir { font-size: 12px; color: var(--text-muted); font-weight: 400; display: block; }
.article-nav a .title { font-weight: 600; color: var(--text-primary); }
.article-nav a.next { text-align: right; justify-content: flex-end; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
  margin-top: auto;
}
.site-footer .footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-footer .footer-brand .sidebar-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  border-bottom: none;
  padding: 0;
}
.site-footer .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.site-footer .footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.site-footer .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.site-footer .footer-col a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.site-footer .footer-col a:hover { color: #fff; }
.site-footer .footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}
.site-footer .footer-bottom a { color: rgba(255,255,255,0.5); }
.site-footer .footer-bottom a:hover { color: #fff; }

/* ===== Mobile Toggle ===== */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 1100;
  width: 40px;
  height: 40px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.mobile-toggle:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 999;
  backdrop-filter: blur(4px);
}

/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 60px 24px;
}
.not-found-box i { font-size: 56px; color: var(--text-muted); margin-bottom: 20px; }
.not-found-box h2 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
.not-found-box .btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  transition: all var(--transition);
}
.not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --sidebar-width: 200px; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .site-footer .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .sidebar-overlay.active { display: block; }
  .sidebar {
    transform: translateX(-100%);
    width: 260px;
  }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; padding-top: 0; }
  .article-hero { padding: 40px 0 32px; }
  .article-hero h1 { font-size: 26px; }
  .article-content .content-body { padding: 24px 20px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .article-nav { flex-direction: column; }
  .article-nav a { max-width: 100%; }
  .site-footer .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .site-footer .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .article-hero h1 { font-size: 22px; }
  .article-hero .meta { flex-direction: column; gap: 8px; align-items: flex-start; }
  .article-content .content-body { padding: 16px; font-size: 15px; }
  .article-content .content-body h2 { font-size: 20px; }
  .article-content .content-body h3 { font-size: 18px; }
  .sidebar-card { padding: 16px; }
  .sidebar-card .related-item img { width: 60px; height: 44px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a4270;
            --primary-dark: #091e33;
            --accent: #f0b429;
            --accent-hover: #d9a220;
            --accent-light: rgba(240, 180, 41, 0.12);
            --bg-body: #f6f8fc;
            --bg-card: #ffffff;
            --bg-sidebar: #0f2b4a;
            --bg-sidebar-hover: rgba(255, 255, 255, 0.06);
            --bg-hero: #0f2b4a;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-weak: #8a9aaa;
            --text-inverse: #ffffff;
            --text-inverse-weak: rgba(255, 255, 255, 0.75);
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 43, 74, 0.06);
            --shadow: 0 8px 30px rgba(15, 43, 74, 0.08);
            --shadow-lg: 0 20px 48px rgba(15, 43, 74, 0.12);
            --shadow-accent: 0 8px 30px rgba(240, 180, 41, 0.25);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 260px;
            --header-height: 0px;
            --container-max: 1200px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧导航 Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: 4px 0 20px rgba(0, 0, 0, 0.08);
            transition: transform var(--transition);
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo i {
            color: var(--accent);
            font-size: 24px;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            overflow-y: auto;
        }
        .sidebar-nav ul {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-nav li {}

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-inverse-weak);
            font-weight: 500;
            font-size: 15px;
            transition: background var(--transition), color var(--transition), transform 0.15s;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-inverse-weak);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: var(--text-inverse);
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            background: rgba(240, 180, 41, 0.15);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active i {
            color: var(--accent);
        }
        .sidebar-nav a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: var(--text-inverse-weak);
            text-align: center;
        }
        .sidebar-footer a {
            color: var(--accent);
        }
        .sidebar-footer a:hover {
            color: var(--accent-hover);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端菜单按钮 ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            color: var(--text-inverse);
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow);
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
        }
        .mobile-toggle:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--bg-hero);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            color: var(--text-inverse);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 43, 74, 0.88) 40%, rgba(15, 43, 74, 0.60) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            max-width: 720px;
        }
        .page-hero h1 span {
            color: var(--accent);
        }
        .page-hero p {
            font-size: 18px;
            color: var(--text-inverse-weak);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--primary);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-inverse);
        }
        .section-dark .text-weak {
            color: var(--text-inverse-weak);
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .section-dark .section-subtitle {
            color: var(--text-inverse-weak);
        }

        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

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

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-hover);
            margin-bottom: 18px;
            transition: background var(--transition);
        }
        .card:hover .card-icon {
            background: rgba(240, 180, 41, 0.22);
        }
        .card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .card .card-tag {
            margin-top: 16px;
            display: inline-block;
            background: var(--accent-light);
            color: var(--primary-light);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            align-self: flex-start;
        }

        /* ===== 图文卡片 ===== */
        .feature-card {
            display: flex;
            gap: 28px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .feature-card .feature-image {
            flex: 0 0 280px;
            min-height: 200px;
            background-size: cover;
            background-position: center;
        }
        .feature-card .feature-body {
            padding: 28px 28px 28px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .feature-card .feature-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .feature-card .feature-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .feature-card .feature-body .feature-meta {
            font-size: 13px;
            color: var(--text-weak);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .feature-card .feature-body .feature-meta i {
            margin-right: 4px;
            color: var(--accent-hover);
        }

        /* ===== 流程 / 步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .step-item::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: 16px;
            left: 16px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-item .step-icon {
            font-size: 36px;
            color: var(--primary-light);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            padding: 20px 24px;
            transition: box-shadow var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            font-weight: 600;
            font-size: 16px;
            color: var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .faq-item .faq-question i {
            color: var(--accent-hover);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            margin-top: 12px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--bg-hero);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: var(--text-inverse);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 43, 74, 0.88) 40%, rgba(15, 43, 74, 0.65) 100%);
            z-index: 1;
            border-radius: var(--radius-lg);
        }
        .cta-box * {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 17px;
            color: var(--text-inverse-weak);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), box-shadow var(--transition), transform 0.15s;
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }
        .btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 10px 36px rgba(240, 180, 41, 0.35);
            transform: translateY(-2px);
            color: var(--primary-dark);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 4px;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-inverse);
            border: 2px solid rgba(255, 255, 255, 0.3);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: none;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: var(--accent-light);
            color: var(--primary-light);
        }
        .badge-primary {
            background: var(--primary);
            color: var(--text-inverse);
        }
        .badge-accent {
            background: var(--accent);
            color: var(--primary-dark);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: var(--accent);
            margin: 16px 0 24px;
        }
        .divider-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-inverse-weak);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .sidebar-logo {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--text-inverse);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-inverse-weak);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-inverse-weak);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-col ul li a i {
            margin-right: 6px;
            color: var(--accent-hover);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-inverse-weak);
        }
        .footer-bottom a {
            color: var(--text-inverse-weak);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-card .feature-image {
                flex: 0 0 200px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-toggle {
                display: block;
            }
            .main-content {
                margin-left: 0;
                padding-top: 64px;
            }

            .page-hero {
                padding: 48px 0 52px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero p {
                font-size: 16px;
            }

            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 28px;
            }

            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 20px 16px;
            }
            .step-item .step-icon {
                font-size: 28px;
            }

            .feature-card {
                flex-direction: column;
            }
            .feature-card .feature-image {
                flex: 0 0 180px;
                min-height: 180px;
            }
            .feature-card .feature-body {
                padding: 20px;
            }

            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box p {
                font-size: 15px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .sidebar-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 999;
            }
            .sidebar-overlay.open {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }
            .card {
                padding: 20px 16px;
            }
            .feature-card .feature-image {
                flex: 0 0 140px;
                min-height: 140px;
            }
        }

        /* ===== 额外辅助 ===== */
        .gap-12 {
            gap: 12px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .w-full {
            width: 100%;
        }

        /* ===== 覆盖背景卡片 ===== */
        .bg-card-cover {
            background-size: cover;
            background-position: center;
            background-color: var(--bg-card);
        }