/* roulang page: index */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --accent: #06b6d4;
  --accent-light: #ecfeff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
  --radius: 14px;
  --radius-lg: 24px;
  --space: 80px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: var(--primary); transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

.container { max-width: 1320px; margin: 0 auto; padding: 0 28px; }
.fluid-container { width: 100%; padding: 0 28px; }

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

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: #eef2ff;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; line-height: 1.3; margin: 0 0 12px; font-weight: 700; letter-spacing: -0.01em; }
.section-head p { color: var(--text-weak); font-size: 16px; margin: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  line-height: 1.4;
  box-shadow: var(--shadow-sm);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.35);
}
.btn-outline {
  background: transparent;
  border-color: #cbd5e1;
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #eef2ff;
  transform: translateY(-2px);
}
.btn-white {
  background: #fff;
  color: var(--primary-dark);
}
.btn-white:hover {
  background: #f1f5f9;
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* ===== 侧边导航 ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}
.sidebar-inner {
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}
.brand-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: -0.01em; }
.brand-text small { display: block; font-size: 11px; color: var(--text-weak); font-weight: 400; margin-top: 2px; }

.main-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.main-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--text-weak);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.main-nav .nav-link i { width: 20px; text-align: center; font-size: 16px; }
.main-nav .nav-link:hover { background: #f1f5f9; color: var(--text); }
.main-nav .nav-link.active {
  background: linear-gradient(135deg, #eef2ff, #f5f0ff);
  color: var(--primary-dark);
  font-weight: 600;
}
.sidebar-cta { margin-top: 24px; }
.sidebar-cta .btn { width: 100%; }

.sidebar-social {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  justify-content: center;
}
.sidebar-social a {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  transition: all 0.2s;
}
.sidebar-social a:hover { background: var(--primary); color: #fff; }

/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 移动端导航 ===== */
.nav-burger {
  display: none;
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 64px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  align-items: center;
  padding: 0 20px;
  gap: 12px;
}
.burger-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: #f1f5f9;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.burger-btn:hover { background: #e2e8f0; }

@media (max-width: 1023.98px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 280px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    z-index: 99;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .sidebar-backdrop.show { display: block; opacity: 1; }
  .main-wrapper { margin-left: 0; }
  .nav-burger { display: flex; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 100px 0 90px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15,23,42,0.86) 0%, rgba(30,27,75,0.78) 45%, rgba(6,182,212,0.35) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.18);
  color: #fff;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-badge i { color: #22d3ee; font-size: 14px; }
.hero h1 {
  font-size: 48px;
  line-height: 1.2;
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.hero h1 .highlight {
  background: linear-gradient(120deg, #a5b4fc, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  margin: 0 0 32px;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat h3 {
  font-size: 30px;
  color: #fff;
  margin: 0;
  font-weight: 700;
  line-height: 1.2;
}
.hero-stat span { font-size: 13px; color: rgba(255,255,255,0.7); }
.hero-float-card {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  padding: 28px 30px;
  color: #fff;
  max-width: 280px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  display: none;
}
.hero-float-card i { font-size: 28px; color: #22d3ee; margin-bottom: 12px; }
.hero-float-card h4 { font-size: 18px; margin: 0 0 8px; font-weight: 600; }
.hero-float-card p { font-size: 14px; color: rgba(255,255,255,0.8); margin: 0; }

@media (min-width: 1200px) {
  .hero-float-card { display: block; }
}

/* ===== 信任条 ===== */
.trust-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.trust-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.trust-text { font-size: 15px; color: var(--text-weak); font-weight: 500; }

/* ===== 核心介绍 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.3s;
}
.feature-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.feature-icon.indigo { background: #eef2ff; color: var(--primary); }
.feature-icon.cyan { background: #ecfeff; color: #0891b2; }
.feature-icon.purple { background: #f5f0ff; color: #8b5cf6; }
.feature-card h3 { font-size: 19px; margin: 0 0 10px; font-weight: 600; }
.feature-card p { color: var(--text-weak); font-size: 15px; margin: 0; line-height: 1.65; }

/* ===== 分类入口 ===== */
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}
.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}
.category-card-image { position: relative; height: 200px; overflow: hidden; }
.category-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .category-card-image img { transform: scale(1.06); }
.category-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.3), transparent);
}
.category-card-body { padding: 24px; }
.category-card-body h3 { font-size: 19px; margin: 0 0 8px; font-weight: 600; }
.category-card-body p { font-size: 14px; color: var(--text-weak); margin: 0 0 16px; line-height: 1.6; }
.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card-link i { transition: transform 0.2s; }
.card-link:hover i { transform: translateX(4px); }

/* ===== 资讯列表 ===== */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.news-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.news-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: #eef2ff;
  padding: 4px 12px;
  border-radius: 999px;
  align-self: flex-start;
}
.news-card h3 { font-size: 17px; font-weight: 600; margin: 0; line-height: 1.5; }
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--text-weak); margin: 0; line-height: 1.6; flex: 1; }
.news-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 13px;
  color: #94a3b8;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.news-meta i { margin-right: 4px; }

/* ===== 流程 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; position: relative; }
.step-item { position: relative; text-align: center; padding: 24px; }
.step-number {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 8px 20px rgba(99,102,241,0.3);
}
.step-item h3 { font-size: 18px; margin: 0 0 8px; font-weight: 600; }
.step-item p { color: var(--text-weak); font-size: 14px; margin: 0; line-height: 1.6; }

/* ===== 数据统计 ===== */
.stats-band {
  background: linear-gradient(120deg, #312e81, #4f46e5 60%, #06b6d4);
  padding: 60px 0;
  color: #fff;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; padding: 20px; }
.stat-item h3 { font-size: 40px; font-weight: 700; margin: 0 0 4px; letter-spacing: -0.02em; }
.stat-item span { font-size: 14px; color: rgba(255,255,255,0.8); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
}
.faq-question i {
  color: var(--primary);
  transition: transform 0.3s;
  font-size: 16px;
}
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 24px;
}
.faq-answer p { margin: 0; padding-bottom: 20px; color: var(--text-weak); font-size: 15px; line-height: 1.7; }
.faq-item.active .faq-answer { max-height: 300px; }

/* ===== CTA ===== */
.cta-block {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 70px 50px;
  text-align: center;
  color: #fff;
}
.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(49,46,129,0.92), rgba(6,182,212,0.75));
}
.cta-content { position: relative; z-index: 2; }
.cta-content h2 { font-size: 34px; font-weight: 700; margin: 0 0 12px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.85); margin: 0 auto 28px; max-width: 480px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,0.7);
  padding: 40px 0 28px;
  margin-top: auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { font-size: 20px; color: #fff; font-weight: 700; margin-bottom: 12px; }
.footer-top p { font-size: 14px; line-height: 1.7; margin: 0; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15px; margin: 0 0 16px; font-weight: 600; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: rgba(255,255,255,0.7); font-size: 14px; transition: color 0.2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p { font-size: 13px; margin: 0; }

/* ===== 按钮焦点样式 ===== */
.btn:focus-visible,
.nav-link:focus-visible,
.category-card a:focus-visible {
  outline: 3px solid rgba(99,102,241,0.4);
  outline-offset: 2px;
}

/* ===== 响应式断点 ===== */
@media (max-width: 1023.98px) {
  .container { padding: 0 20px; }
  .section { --space: 60px; padding: var(--space) 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .footer-top { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 80px 0 70px; }
  .hero h1 { font-size: 38px; }
}

@media (max-width: 767.98px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
  .cta-block { padding: 50px 24px; }
  .cta-block h2 { font-size: 26px; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .stat-item h3 { font-size: 34px; }
}

@media (max-width: 520px) {
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-bottom p { font-size: 12px; }
}

/* ===== 过渡动画 ===== */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}

/* roulang page: category1 */
:root {
      --primary: #4f6ef2;
      --primary-dark: #3a52d6;
      --primary-soft: #eef1fe;
      --accent: #ff7e67;
      --accent-soft: #fff0ec;
      --green: #22c58b;
      --green-soft: #e2f9f0;
      --bg: #f6f8ff;
      --white: #ffffff;
      --text: #1f2240;
      --text-light: #666d92;
      --border: #e8e9f5;
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --shadow: 0 10px 40px rgba(35, 42, 98, 0.08);
      --shadow-hover: 0 18px 50px rgba(35, 42, 98, 0.14);
      --sidebar-w: 260px;
      --transition: all 0.25s ease;
    }

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

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 28px;
    }

    /* ===== 左侧竖向导航 ===== */
    .site-wrapper {
      display: flex;
      min-height: 100vh;
    }

    .site-sidebar {
      width: var(--sidebar-w);
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      background: var(--white);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 200;
      padding: 28px 20px 24px;
    }

    .sidebar-brand {
      margin-bottom: 36px;
    }

    .brand-link {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary), #8b5cf6);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 6px 18px rgba(79, 110, 242, 0.35);
    }

    .brand-text {
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text);
    }

    .main-nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 0 0 auto;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 13px 16px;
      border-radius: var(--radius-md);
      color: var(--text-light);
      font-size: 15px;
      font-weight: 500;
      transition: var(--transition);
      border: 1px solid transparent;
    }

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

    .nav-link:hover {
      background: var(--primary-soft);
      color: var(--primary);
      border-color: #dfe5fd;
      transform: translateX(4px);
    }

    .nav-link.active {
      background: linear-gradient(135deg, var(--primary), #6c5ce7);
      color: #fff;
      box-shadow: 0 8px 20px rgba(79, 110, 242, 0.35);
    }

    .nav-link.active:hover {
      transform: none;
      color: #fff;
    }

    .sidebar-footer {
      margin-top: auto;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }

    .sidebar-footer p {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .sidebar-email {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--primary);
      font-weight: 500;
      word-break: break-all;
    }

    .sidebar-email:hover {
      color: var(--primary-dark);
    }

    /* ===== 主内容区 ===== */
    .main-content {
      flex: 1;
      margin-left: var(--sidebar-w);
      min-width: 0;
    }

    /* ===== 通用按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 30px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      border: 2px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      line-height: 1.2;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 8px 24px rgba(79, 110, 242, 0.3);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(79, 110, 242, 0.4);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.15);
      color: #fff;
      border-color: rgba(255, 255, 255, 0.6);
      backdrop-filter: blur(6px);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.25);
      transform: translateY(-2px);
    }

    .btn-light {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    }

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

    .btn:focus-visible, .nav-link:focus-visible, a:focus-visible {
      outline: 3px solid rgba(79, 110, 242, 0.5);
      outline-offset: 2px;
    }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      padding: 140px 0 100px;
      background-size: cover;
      background-position: center;
      color: #fff;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(30, 32, 60, 0.72), rgba(79, 110, 242, 0.35), rgba(255, 126, 103, 0.2));
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 760px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.18);
      border: 1px solid rgba(255, 255, 255, 0.3);
      backdrop-filter: blur(8px);
      padding: 7px 18px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 24px;
    }

    .hero-badge i {
      color: #ffd166;
    }

    .hero-content h1 {
      font-size: 48px;
      line-height: 1.18;
      margin: 0 0 18px;
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    .hero-content p {
      font-size: 18px;
      line-height: 1.7;
      opacity: 0.92;
      margin-bottom: 32px;
      max-width: 620px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-stats {
      display: flex;
      gap: 42px;
      flex-wrap: wrap;
    }

    .stat strong {
      font-size: 30px;
      font-weight: 800;
      display: block;
      line-height: 1.2;
      color: #fff;
    }

    .stat span {
      font-size: 14px;
      opacity: 0.8;
    }

    /* ===== 功能标签条 ===== */
    .feature-ribbon {
      background: var(--white);
      border-bottom: 1px solid var(--border);
      padding: 30px 0;
      margin-top: -1px;
    }

    .ribbon-items {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .ribbon-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      padding: 10px 20px;
      background: var(--bg);
      border-radius: 999px;
      transition: var(--transition);
    }

    .ribbon-item i {
      color: var(--primary);
      font-size: 17px;
    }

    .ribbon-item:hover {
      background: var(--primary-soft);
      transform: translateY(-2px);
    }

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

    .section-alt {
      background: var(--white);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .section-head {
      text-align: center;
      max-width: 640px;
      margin: 0 auto 60px;
    }

    .section-tag {
      display: inline-block;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 18px;
      border-radius: 999px;
      margin-bottom: 14px;
      letter-spacing: 0.02em;
    }

    .section-head h2 {
      font-size: 38px;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin: 0 0 12px;
      line-height: 1.25;
    }

    .section-head p {
      font-size: 17px;
      color: var(--text-light);
      line-height: 1.7;
      margin: 0;
    }

    /* ===== 功能卡片 ===== */
    .feature-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

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

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

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

    .feature-card-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 22px;
      background: var(--primary-soft);
      color: var(--primary);
    }

    .feature-card:nth-child(2) .feature-card-icon {
      background: var(--green-soft);
      color: var(--green);
    }

    .feature-card:nth-child(3) .feature-card-icon {
      background: var(--accent-soft);
      color: var(--accent);
    }

    .feature-card:nth-child(4) .feature-card-icon {
      background: #fff6e8;
      color: #f5a623;
    }

    .feature-card:nth-child(5) .feature-card-icon {
      background: #f0efff;
      color: #8b5cf6;
    }

    .feature-card:nth-child(6) .feature-card-icon {
      background: #e8f8fa;
      color: #0bb5c0;
    }

    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin: 0 0 10px;
    }

    .feature-card p {
      font-size: 15px;
      color: var(--text-light);
      line-height: 1.6;
      margin: 0;
    }

    .feature-card .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 18px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }

    .feature-card .card-link:hover {
      gap: 10px;
    }

    /* ===== 图文详情 ===== */
    .detail-row {
      display: flex;
      align-items: center;
      gap: 70px;
      padding: 30px 0 70px;
    }

    .detail-row:last-child {
      padding-bottom: 0;
    }

    .detail-row.reverse {
      flex-direction: row-reverse;
    }

    .detail-image {
      flex: 0 0 46%;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow);
      background: var(--primary-soft);
    }

    .detail-image img {
      width: 100%;
      height: auto;
      transition: transform 0.5s ease;
    }

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

    .detail-text {
      flex: 1;
    }

    .detail-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 5px 16px;
      border-radius: 999px;
      margin-bottom: 16px;
    }

    .detail-text h3 {
      font-size: 28px;
      font-weight: 800;
      margin: 0 0 14px;
      line-height: 1.3;
      letter-spacing: -0.01em;
    }

    .detail-text > p {
      font-size: 16px;
      color: var(--text-light);
      line-height: 1.7;
      margin-bottom: 24px;
    }

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

    .detail-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 10px 0;
      font-size: 15px;
      color: var(--text);
    }

    .detail-item i {
      color: var(--green);
      font-size: 17px;
      margin-top: 2px;
      flex: 0 0 auto;
    }

    /* ===== 流程 ===== */
    .process-section {
      padding: 90px 0;
      background: linear-gradient(135deg, #f6f8ff 0%, #eef1fe 100%);
    }

    .process-steps {
      display: flex;
      gap: 30px;
      margin-top: 50px;
    }

    .step {
      flex: 1;
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      text-align: center;
      box-shadow: var(--shadow);
      position: relative;
      transition: var(--transition);
    }

    .step:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .step-number {
      position: absolute;
      top: -18px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #fff;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 0 4px 12px rgba(79, 110, 242, 0.4);
    }

    .step-icon {
      width: 60px;
      height: 60px;
      margin: 0 auto 18px;
      background: var(--primary-soft);
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--primary);
    }

    .step:nth-child(2) .step-icon {
      background: var(--green-soft);
      color: var(--green);
    }

    .step:nth-child(3) .step-icon {
      background: var(--accent-soft);
      color: var(--accent);
    }

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

    .step p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.6;
      margin: 0;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 90px 0;
    }

    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-accordion {
      background: transparent;
      list-style: none;
      margin: 0;
    }

    .faq-accordion .accordion-item {
      background: var(--white);
      border: 1px solid var(--border) !important;
      border-radius: var(--radius-md) !important;
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-accordion .accordion-item:hover {
      border-color: #d5dcfd !important;
      box-shadow: 0 4px 16px rgba(35, 42, 98, 0.06);
    }

    .faq-accordion .accordion-title {
      background: var(--white) !important;
      color: var(--text) !important;
      font-size: 16px;
      font-weight: 600;
      padding: 20px 24px !important;
      border-bottom: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .faq-accordion .accordion-title:hover {
      background: var(--primary-soft) !important;
      color: var(--primary) !important;
    }

    .faq-accordion .accordion-title::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 14px;
      color: var(--text-light);
      transition: transform 0.3s ease;
      margin-left: 12px;
    }

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

    .faq-accordion .accordion-content {
      background: var(--white) !important;
      color: var(--text-light) !important;
      font-size: 15px;
      line-height: 1.7;
      padding: 20px 24px !important;
      border-bottom: 0 !important;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 60px 0 90px;
    }

    .cta-box {
      background: linear-gradient(135deg, var(--primary) 0%, #6c5ce7 60%, #8b5cf6 100%);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(79, 110, 242, 0.4);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      top: -60%;
      right: -20%;
      width: 500px;
      height: 500px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
    }

    .cta-box h2 {
      font-size: 34px;
      font-weight: 800;
      margin: 0 0 14px;
      position: relative;
      z-index: 1;
    }

    .cta-box p {
      font-size: 17px;
      opacity: 0.9;
      max-width: 520px;
      margin: 0 auto 32px;
      position: relative;
      z-index: 1;
    }

    .cta-box .btn-light {
      position: relative;
      z-index: 1;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: #1a1c29;
      color: rgba(255, 255, 255, 0.75);
      padding: 64px 0 0;
      font-size: 14px;
    }

    .footer a {
      color: rgba(255, 255, 255, 0.65);
    }

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

    .footer-top {
      display: flex;
      gap: 60px;
      flex-wrap: wrap;
      padding-bottom: 40px;
    }

    .footer-top > div:first-child {
      flex: 1 minmax(250px, 1.4fr);
    }

    .footer-brand {
      font-size: 22px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }

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

    .footer-top p {
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.55);
      max-width: 340px;
    }

    .footer-col {
      flex: 1;
      min-width: 140px;
    }

    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }

    .footer-col ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

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

    .footer-col ul a {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 14px;
      transition: var(--transition);
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 22px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      color: rgba(255, 255, 255, 0.45);
      font-size: 13px;
    }

    .footer-bottom p {
      margin: 0;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .site-wrapper {
        flex-direction: column;
      }

      .site-sidebar {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 14px 20px;
        flex-direction: row;
        align-items: center;
        gap: 18px;
      }

      .sidebar-brand {
        margin-bottom: 0;
        flex-shrink: 0;
      }

      .brand-icon {
        width: 36px;
        height: 36px;
        font-size: 15px;
      }

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

      .main-nav {
        flex-direction: row;
        overflow-x: auto;
        gap: 6px;
        flex: 1;
        padding-bottom: 4px;
      }

      .nav-link {
        white-space: nowrap;
        padding: 9px 14px;
        font-size: 14px;
      }

      .nav-link:hover {
        transform: translateX(0);
      }

      .sidebar-footer {
        display: none;
      }

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

      .page-hero {
        padding: 100px 0 80px;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }

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

      .hero-content p {
        font-size: 16px;
      }

      .hero-stats {
        gap: 24px;
      }

      .stat strong {
        font-size: 24px;
      }

      .ribbon-items {
        justify-content: center;
      }

      .section {
        padding: 60px 0;
      }

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

      .feature-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }

      .feature-card {
        padding: 28px 22px;
      }

      .detail-row {
        flex-direction: column;
        gap: 32px;
        padding: 20px 0 50px;
      }

      .detail-row.reverse {
        flex-direction: column;
      }

      .detail-image {
        flex: 0 0 auto;
        width: 100%;
      }

      .detail-text h3 {
        font-size: 24px;
      }

      .process-steps {
        flex-direction: column;
        gap: 30px;
      }

      .step {
        padding: 30px 24px;
      }

      .footer-top {
        gap: 40px;
      }

      .footer-top > div:first-child {
        flex-basis: 100%;
      }

      .footer.cta-section .cta-box {
        padding: 44px 28px;
      }

      .cta-box {
        padding: 44px 28px;
      }

      .cta-box h2 {
        font-size: 26px;
      }
    }

    @media (max-width: 520px) {
      .site-sidebar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 16px 20px;
      }

      .sidebar-brand {
        width: 100%;
      }

      .main-nav {
        width: 100%;
        overflow-x: auto;
      }

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

      .hero-actions .btn {
        padding: 12px 22px;
        font-size: 14px;
      }

      .feature-cards {
        grid-template-columns: 1fr;
      }

      .detail-text h3 {
        font-size: 22px;
      }

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

/* roulang page: article */
:root {
  --primary: #4f6df5;
  --primary-dark: #3b55d9;
  --primary-light: #edf1fe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --success: #10b981;
  --bg: #f5f7fc;
  --surface: #ffffff;
  --text: #1e2a3e;
  --text-secondary: #5a6b85;
  --text-muted: #8a94a6;
  --border: #e3e9f2;
  --shadow-xs: 0 1px 3px rgba(30,42,62,.04);
  --shadow-sm: 0 2px 10px rgba(30,42,62,.06);
  --shadow-md: 0 8px 24px rgba(30,42,62,.08);
  --shadow-lg: 0 16px 40px rgba(30,42,62,.10);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --transition: all .25s ease;
  --sidebar-w: 260px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}
.site-shell { display: flex; min-height: 100vh; }
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.main-content { flex: 1; }

/* 左侧导航 */
.sidebar {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  width: var(--sidebar-w);
  background: linear-gradient(170deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
  z-index: 200;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 28px 22px 24px;
}
.sidebar-inner { display: flex; flex-direction: column; height: 100%; }
.sidebar-brand {
  display: flex; align-items: center; gap: 10px;
  color: #fff;
  font-size: 22px; font-weight: 800; letter-spacing: .5px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.sidebar-brand:hover { color: var(--primary); background: rgba(255,255,255,.06); }
.brand-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff;
  box-shadow: 0 6px 16px rgba(79,109,245,.35);
}
.brand-text { font-size: 20px; font-weight: 800; }
.sidebar-divider { height: 1px; background: rgba(255,255,255,.08); margin: 22px 12px 18px; }
.main-nav { display: flex; flex-direction: column; gap: 6px; }
.nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  color: rgba(255,255,255,.72);
  font-size: 14.5px;
  font-weight: 500;
  border-radius: 12px;
  transition: var(--transition);
}
.nav-link i { width: 20px; text-align: center; font-size: 16px; }
.nav-link:hover { background: rgba(255,255,255,.08); color: #fff; transform: translateX(2px); }
.nav-link.active {
  background: linear-gradient(135deg, var(--primary), #6d5ef0);
  color: #fff;
  box-shadow: 0 6px 18px rgba(79,109,245,.32);
}
.sidebar-bottom { margin-top: auto; padding-top: 24px; }
.sidebar-tip {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
}
.sidebar-tip i { color: var(--accent); margin-right: 6px; }

/* 移动端导航 */
.mobile-header {
  display: none;
  position: sticky; top: 0; z-index: 150;
  height: 62px;
  background: rgba(15,23,42,.96);
  backdrop-filter: blur(12px);
  color: #fff;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
}
.mobile-brand { color: #fff; font-size: 18px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.mobile-brand i { color: var(--primary); }
.mobile-toggle {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,.08);
  color: #fff; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.mobile-toggle:hover { background: rgba(255,255,255,.18); }
.mobile-nav-panel {
  display: none;
  background: #0f172a;
  padding: 12px 18px 20px;
  border-top: 1px solid rgba(255,255,255,.06);
  position: sticky; top: 62px; z-index: 149;
}
.mobile-nav-panel .main-nav { flex-direction: column; gap: 4px; }
.mobile-nav-panel .nav-link { padding: 12px 14px; }
.mobile-nav-panel.open { display: block; animation: slideDown .25s ease; }
@keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px;
  font-size: 15px; font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6d5ef0);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79,109,245,.3);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(79,109,245,.4); }
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,.5);
  color: #fff;
}
.btn-outline:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }
.btn-white {
  background: #fff; color: var(--text);
  box-shadow: 0 6px 16px rgba(30,42,62,.1);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(30,42,62,.14); color: var(--text); }
.btn-soft {
  background: var(--primary-light); color: var(--primary);
  padding: 8px 18px; font-size: 13px;
}
.btn-soft:hover { background: var(--primary); color: #fff; }
.btn:focus, .btn:focus-visible { outline: 3px solid rgba(79,109,245,.35); outline-offset: 2px; }

/* Hero */
.article-hero {
  position: relative;
  padding: 64px 0 54px;
  background: linear-gradient(120deg, rgba(15,23,42,.82) 0%, rgba(30,41,59,.7) 50%, rgba(49,46,129,.75) 100%),
              url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.article-hero::after {
  content: '';
  position: absolute;
  right: -80px; top: -100px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,.1), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.hero-breadcrumb a { color: rgba(255,255,255,.75); }
.hero-breadcrumb a:hover { color: #fff; }
.hero-breadcrumb .sep { color: rgba(255,255,255,.35); }
.hero-breadcrumb .current { color: rgba(255,255,255,.95); }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.14);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius-full);
  padding: 5px 14px;
  font-size: 12.5px; font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .3px;
}
.article-hero h1 {
  font-size: clamp(28px, 4.2vw, 42px);
  font-weight: 800;
  line-height: 1.3;
  max-width: 860px;
  margin-bottom: 22px;
  letter-spacing: -.5px;
}
.post-meta {
  display: flex; flex-wrap: wrap; gap: 22px;
  font-size: 13.5px;
  color: rgba(255,255,255,.72);
}
.post-meta span { display: inline-flex; align-items: center; gap: 6px; }
.post-meta i { font-size: 14px; color: rgba(255,255,255,.5); }

/* 文章详情布局 */
.post-layout {
  padding: 42px 0 20px;
  position: relative;
  z-index: 2;
}
.post-main-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px 44px;
  margin-bottom: 32px;
}
.post-content { font-size: 15.5px; color: var(--text); line-height: 1.95; }
.post-content > * { margin-bottom: 20px; }
.post-content p { margin-bottom: 20px; }
.post-content h2 {
  font-size: 24px; font-weight: 700;
  margin-top: 36px; margin-bottom: 16px;
  color: var(--text);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}
.post-content h3 {
  font-size: 20px; font-weight: 650;
  margin-top: 28px; margin-bottom: 12px;
  color: var(--text);
}
.post-content h4 {
  font-size: 17px; font-weight: 600;
  margin-top: 20px; margin-bottom: 10px;
}
.post-content a { color: var(--primary); border-bottom: 1px solid transparent; }
.post-content a:hover { border-bottom-color: var(--primary); }
.post-content ul, .post-content ol { padding-left: 26px; margin-bottom: 20px; }
.post-content li { margin-bottom: 8px; }
.post-content li::marker { color: var(--primary); }
.post-content blockquote {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  margin: 24px 0;
  font-style: italic;
}
.post-content img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  margin: 24px 0;
}
.post-content img + span, .post-content figcaption {
  font-size: 12.5px; color: var(--text-muted);
  text-align: center; display: block;
  margin-top: -14px; margin-bottom: 22px;
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14px;
}
.post-content th, .post-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.post-content th { background: var(--primary-light); font-weight: 600; }
.post-content code {
  background: #f1f3f9;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 13.5px;
  color: #e11d48;
}
.post-content pre {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 22px 0;
  font-size: 13.5px;
  line-height: 1.7;
}
.post-content pre code { background: transparent; color: inherit; padding: 0; }

/* 标签 */
.post-tags {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--bg);
  border-radius: var(--radius-full);
  padding: 6px 15px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.tag:hover { background: var(--primary-light); color: var(--primary); border-color: transparent; transform: translateY(-1px); }
.tag::before { content: '#'; color: var(--primary); font-weight: 700; }

/* 分享区 */
.post-share {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  margin-top: 26px;
  padding: 18px 20px;
  background: var(--bg);
  border-radius: var(--radius-md);
}
.share-title { font-size: 14px; font-weight: 600; color: var(--text-secondary); display: flex; align-items: center; gap: 8px; }
.share-links { display: flex; gap: 8px; }
.share-btn {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 15px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.share-btn:hover { background: var(--primary); color: #fff; border-color: transparent; transform: translateY(-2px); box-shadow: 0 6px 14px rgba(79,109,245,.25); }

/* 侧边信息卡 */
.post-side-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  margin-bottom: 24px;
}
.side-card-title {
  font-size: 16px; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 22px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}
.side-card-title i { color: var(--primary); }
.info-list { list-style: none; }
.info-list li {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 13.5px;
}
.info-list li:last-child { border-bottom: none; }
.info-list .info-label { color: var(--text-muted); min-width: 60px; }
.info-list .info-value { color: var(--text); font-weight: 500; flex: 1; text-align: right; }
.info-list .info-value a { color: var(--primary); }
.mini-cta {
  background: linear-gradient(135deg, var(--primary-light), #f0edfe);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  text-align: center;
  margin-top: 18px;
}
.mini-cta p { font-size: 13.5px; color: var(--text-secondary); margin-bottom: 12px; }
.mini-cta .btn { width: 100%; padding: 10px 0; font-size: 14px; }

/* 相关文章 */
.related-section { padding: 46px 0 20px; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  margin-bottom: 30px; margin-top: 34px;
}
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  padding: 4px 14px;
  font-size: 13px; font-weight: 600;
  margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(22px, 3vw, 28px); font-weight: 750; letter-spacing: -.3px; }
.section-head p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.related-grid { margin: 0 -14px; }
.related-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
  margin: 0 14px 28px;
}
.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.related-card-img-wrap {
  position: relative;
  overflow: hidden;
  height: 170px;
}
.related-card-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-card-img-wrap img { transform: scale(1.05); }
.related-card-img-wrap::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15,23,42,.25));
}
.mini-badge {
  position: absolute; left: 14px; top: 14px; z-index: 2;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(6px);
  color: var(--primary);
  font-size: 12px; font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(30,42,62,.1);
}
.related-card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.related-card-body h3 {
  font-size: 16.5px; font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}
.related-card:hover .related-card-body h3 { color: var(--primary); }
.related-card-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-date {
  display: flex; align-items: center; gap: 6px;
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: auto;
}

/* FAQ */
.faq-section { padding: 40px 0 26px; }
.faq-list { max-width: 860px; margin: 30px auto 0; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.active { border-color: var(--primary); box-shadow: 0 8px 24px rgba(79,109,245,.1); }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 18px 22px;
  text-align: left;
  font-size: 15px; font-weight: 600;
  color: var(--text);
  background: transparent;
  transition: var(--transition);
}
.faq-question i { color: var(--text-muted); transition: transform .3s ease; flex-shrink: 0; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-item.active .faq-question { color: var(--primary); }
.faq-answer { display: none; padding: 0 22px 20px; font-size: 14px; color: var(--text-secondary); line-height: 1.85; }

/* CTA */
.cta-section { padding: 30px 0 54px; }
.cta-card {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 55%, #312e81 100%),
              url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  background-blend-mode: overlay;
  border-radius: var(--radius-lg);
  padding: 54px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-card::before {
  content: '';
  position: absolute; top: -60px; right: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.cta-card::after {
  content: '';
  position: absolute; bottom: -70px; left: -30px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(79,109,245,.2);
  filter: blur(30px);
}
.cta-card h2 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-card p { font-size: 15px; color: rgba(255,255,255,.7); margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; position: relative; z-index: 1; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; position: relative; z-index: 1; }

/* 内容未找到 */
.not-found-wrap { padding: 90px 0; }
.not-found-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 54px 40px;
  text-align: center;
}
.not-found-icon {
  width: 76px; height: 76px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
  font-size: 30px;
  color: var(--primary);
}
.not-found-badge {
  display: inline-flex;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px; font-weight: 700;
  border-radius: var(--radius-full);
  padding: 3px 14px;
  margin-bottom: 14px;
}
.not-found-card h2 { font-size: 26px; font-weight: 750; margin-bottom: 12px; }
.not-found-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 26px; line-height: 1.8; }

/* Footer */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,.7);
  padding: 56px 0 24px;
  margin-top: 50px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 34px;
}
.footer-brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 20px; font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand i { color: var(--primary); }
.footer-top > div > p { font-size: 13.5px; line-height: 1.8; color: rgba(255,255,255,.55); max-width: 260px; }
.footer-col h4 {
  font-size: 14px; font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 13.5px; color: rgba(255,255,255,.55); transition: var(--transition); }
.footer-col ul li a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.45); }
.footer-bottom a:hover { color: #fff; }

/* 响应式 */
@media (max-width: 1024px) {
  .post-main-card { padding: 34px 30px; }
  .cta-card { padding: 44px 30px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-top > div:first-child { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .sidebar { display: none; }
  .main-wrapper { margin-left: 0; }
  .mobile-header { display: flex; }
  .article-hero { padding: 48px 0 40px; }
  .post-layout { padding: 28px 0 12px; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .post-main-card { padding: 26px 20px; border-radius: var(--radius-md); }
  .related-grid .cell { width: 100%; }
  .related-card-img-wrap { height: 200px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .article-hero { padding: 40px 0 32px; }
  .post-meta { gap: 14px; font-size: 12.5px; }
  .post-share { flex-direction: column; align-items: flex-start; }
  .share-links { width: 100%; justify-content: space-between; }
  .share-links .share-btn { flex: 1; justify-content: center; }
  .post-tags { margin-top: 26px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .related-card-img-wrap { height: 180px; }
}

/* roulang page: category2 */
/* ===== 基础变量 ===== */
:root {
  --primary: #4f6df5;
  --primary-dark: #3d56d9;
  --primary-light: #eef1fe;
  --accent: #f58a4f;
  --bg: #f6f8fc;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(79, 109, 245, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 268px;
  --bg-blue: #f0f4ff;
  --success: #10b981;
  --warning: #f59e0b;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

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

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; outline: none; }
:focus-visible { outline: 3px solid rgba(79, 109, 245, 0.4); outline-offset: 2px; border-radius: 4px; }
i, svg { vertical-align: middle; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== 侧边导航布局 ===== */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: #1e2a4a;
  background-image: linear-gradient(180deg, rgba(30, 42, 74, 0.98), rgba(23, 32, 58, 0.99)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 10px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f6df5, #7c4df5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 6px 16px rgba(79, 109, 245, 0.4);
}

.brand-text { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; line-height: 1.2; }
.brand-sub { font-size: 11px; opacity: 0.55; letter-spacing: 1px; margin-top: 2px; }

.main-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 24px 0;
  flex: 1;
}

.main-nav .nav-section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.4);
  padding: 0 12px;
  margin-bottom: 8px;
  font-weight: 600;
}

.main-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  transition: all 0.3s ease;
}

.main-nav .nav-link i {
  width: 22px;
  text-align: center;
  font-size: 16px;
}

.main-nav .nav-link:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
  transform: translateX(2px);
}

.main-nav .nav-link.active {
  background: linear-gradient(135deg, #4f6df5, #6a4df5);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 109, 245, 0.35);
}

.sidebar-contact {
  padding: 20px 10px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

.sidebar-contact .label { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; opacity: 0.5; margin-bottom: 6px; }
.sidebar-contact a { color: rgba(255,255,255,0.8); }
.sidebar-contact a:hover { color: #fff; }

/* ===== 主内容区 ===== */
.main-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.content-wrap {
  flex: 1;
}

/* ===== 页面顶部横幅 ===== */
.page-hero {
  position: relative;
  padding: 72px 0 72px;
  background: linear-gradient(135deg, #1e2a4a 0%, #2b3d6e 50%, #4f6df5 100%);
  background-image:
    url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  color: #fff;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(30,42,74,0.88) 0%, rgba(35,52,96,0.72) 60%, rgba(79,109,245,0.45) 100%);
  z-index: 1;
}

.page-hero .container { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  padding: 6px 16px;
  border-radius: 32px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}

.page-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.page-hero .lead {
  font-size: 18px;
  opacity: 0.85;
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 28px;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  border: none;
  transition: all 0.3s ease;
  cursor: pointer;
  line-height: 1.5;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(79, 109, 245, 0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(79, 109, 245, 0.45);
}

.btn-white {
  background: #fff;
  color: #1e2a4a;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.btn-white:hover {
  background: #f0f4ff;
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

/* ===== 板块间距 ===== */
.section {
  padding: 72px 0;
}

.section-alt { background: var(--bg); }
.section-white { background: #fff; }
.section-blue { background: var(--bg-blue); }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 44px;
}

.section-head .kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: 32px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

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

/* ===== 快速上手流程 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.4s ease;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79,109,245,0.3);
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f6df5, #7c4df5);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 16px;
  box-shadow: 0 6px 16px rgba(79, 109, 245, 0.3);
}

.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

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

.step-arrow {
  position: absolute;
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 16px;
  z-index: 2;
  background: var(--bg);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== 教程分类卡片 ===== */
.tutorial-cats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.cat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.cat-thumb {
  height: 160px;
  position: relative;
  overflow: hidden;
  background-size: cover;
  background-position: center;
}

.cat-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 30%, rgba(20,30,60,0.5));
}

.cat-thumb .cat-icon {
  position: absolute;
  z-index: 2;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  border: 1px solid rgba(255,255,255,0.25);
}

.cat-body {
  padding: 24px;
}

.cat-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

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

.cat-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.cat-meta span {
  font-size: 13px;
  color: var(--text-light);
}

.cat-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cat-link:hover { color: var(--primary-dark); gap: 10px; }

/* ===== 教程列表 ===== */
.tutorial-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.tutorial-item {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
  display: flex;
  gap: 18px;
  transition: all 0.3s ease;
  align-items: flex-start;
}

.tutorial-item:hover {
  border-color: rgba(79,109,245,0.4);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.tutorial-item .thumb {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
  position: relative;
}

.tutorial-item .thumb i {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  background: rgba(30,42,74,0.25);
  border-radius: 12px;
}

.tutorial-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
  line-height: 1.45;
}

.tutorial-item p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-item .meta {
  display: flex;
  gap: 14px;
  margin-top: 10px;
  font-size: 12px;
  color: #9ca3af;
}

/* ===== 技巧卡片 ===== */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tip-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  border-left: 4px solid var(--primary);
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
  transition: var(--transition);
}

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

.tip-card .tip-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
}

.tip-card:nth-child(1) .tip-icon { background: #eef2ff; color: #4f6df5; }
.tip-card:nth-child(2) .tip-icon { background: #ecfdf5; color: #10b981; }
.tip-card:nth-child(3) .tip-icon { background: #fff7ed; color: #f59e0b; }
.tip-card:nth-child(4) .tip-icon { background: #faf5ff; color: #8b5cf6; }

.tip-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.tip-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover { border-color: rgba(79,109,245,0.3); box-shadow: var(--shadow-md); }

.faq-q {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--text);
}

.faq-q i {
  color: var(--primary);
  font-size: 14px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-q:hover i { transform: rotate(180deg); }

.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 72px 0;
  background: linear-gradient(135deg, #1e2a4a 0%, #3d56d9 50%, #4f6df5 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  top: -200px;
  right: -100px;
}

.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 16px;
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto 28px;
}

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

/* ===== 页脚 ===== */
.footer {
  background: #141c30;
  color: rgba(255,255,255,0.75);
  padding: 56px 0 0;
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
}

.footer .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
}

.footer-top p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ===== 移动端侧栏按钮 ===== */
.mobile-bar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: #1e2a4a;
  padding: 14px 20px;
  align-items: center;
  justify-content: space-between;
}

.mobile-bar .brand-row { display: flex; align-items: center; gap: 10px; color: #fff; }
.mobile-bar .brand-row i { font-size: 20px; color: var(--primary); }
.mobile-bar .brand-row span { font-weight: 700; font-size: 17px; }

.mobile-menu-btn {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 22px;
  padding: 6px 10px;
  border-radius: 8px;
}

.mobile-menu-btn:hover { background: rgba(255,255,255,0.1); }

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(20,28,48,0.98);
  z-index: 300;
  padding: 24px;
  flex-direction: column;
}

.mobile-nav.open { display: flex; }

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.mobile-nav-close {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 24px;
  padding: 6px;
}

.mobile-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 10px;
  font-size: 18px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.mobile-nav .nav-link:last-child { border-bottom: none; }
.mobile-nav .nav-link.active { color: #fff; font-weight: 700; }
.mobile-nav .nav-link i { width: 24px; color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorial-cats { grid-template-columns: repeat(2, 1fr); }
  .tips-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer { margin-left: 0; width: 100%; }
  .footer .container { padding: 0 24px; }
}

@media (max-width: 768px) {
  .sidebar { display: none; }
  .mobile-bar { display: flex; }
  .main-content { margin-top: 64px; }
  .page-hero { padding: 64px 0; }
  .page-hero h1 { font-size: 32px; }
  .page-hero .lead { font-size: 16px; }
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 28px; }
  .steps-grid { grid-template-columns: 1fr; }
  .tutorial-cats { grid-template-columns: 1fr; }
  .tutorial-list { grid-template-columns: 1fr; }
  .faq-q { font-size: 15px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section h2 { font-size: 26px; }
}

@media (max-width: 520px) {
  .page-hero h1 { font-size: 26px; }
  .container { padding: 0 18px; }
  .section { padding: 44px 0; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .tutorial-item { flex-direction: column; }
  .tutorial-item .thumb { width: 100%; height: 140px; }
  .step-arrow { display: none; }
}

/* roulang page: category3 */
:root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --primary-light: #818cf8;
            --accent: #06b6d4;
            --accent-light: #67e8f9;
            --bg: #f6f7fb;
            --surface: #ffffff;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e7eaf0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 14px 44px rgba(15, 23, 42, 0.1);
            --gradient: linear-gradient(135deg, #4f46e5, #06b6d4);
            --space-section: clamp(60px, 8vw, 96px);
            --sidebar-w: 260px;
            --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        button, input, select, textarea {
            font: inherit;
            color: inherit;
        }
        ul, ol {
            list-style: none;
        }
        i, svg {
            vertical-align: middle;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--sidebar-w);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 200;
            padding: 28px 18px 24px;
            display: flex;
            flex-direction: column;
            transition: transform .3s ease;
        }
        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 21px;
            font-weight: 800;
            color: var(--text);
            padding: 14px 12px 22px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 22px;
            letter-spacing: .5px;
        }
        .sidebar-brand i {
            color: var(--primary);
            font-size: 24px;
        }
        .nav-caption {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1.4px;
            padding: 0 12px 10px;
        }
        .main-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 15px;
            transition: all .25s ease;
            border: 1px solid transparent;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color .2s ease;
        }
        .nav-link:hover {
            background: var(--bg);
            color: var(--primary);
            transform: translateX(3px);
        }
        .nav-link:hover i {
            color: var(--primary);
        }
        .nav-link.active {
            background: rgba(79, 70, 229, .08);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(79, 70, 229, .12);
        }
        .nav-link.active i {
            color: var(--primary);
        }
        .sidebar-footer-note {
            margin-top: auto;
            padding: 18px 12px 8px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .sidebar-footer-note strong {
            display: block;
            color: var(--text-light);
            font-size: 14px;
            margin-bottom: 4px;
        }
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 150;
            padding: 0 18px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(15, 23, 42, .04);
        }
        .mobile-logo {
            font-size: 19px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-logo i {
            color: var(--primary);
            font-size: 22px;
        }
        .menu-toggle {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 18px;
            cursor: pointer;
            transition: all .2s ease;
        }
        .menu-toggle:hover {
            background: rgba(79, 70, 229, .08);
            color: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .5);
            z-index: 180;
            opacity: 0;
            transition: opacity .3s ease;
            pointer-events: none;
        }
        .sidebar-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .main-area {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .page-hero {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 90px 0 72px;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .88) 0%, rgba(79, 70, 229, .72) 60%, rgba(6, 182, 212, .5) 100%);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            bottom: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .05);
            border: 2px solid rgba(255, 255, 255, .1);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 999px;
            padding: 7px 18px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, .95);
            margin-bottom: 22px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: clamp(30px, 5vw, 46px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, .2);
        }
        .hero-sub {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 30px;
            max-width: 600px;
        }
        .hero-search {
            display: flex;
            align-items: center;
            background: #fff;
            border-radius: 60px;
            padding: 6px 6px 6px 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, .2);
            max-width: 560px;
            transition: box-shadow .3s ease;
        }
        .hero-search:focus-within {
            box-shadow: 0 0 0 4px rgba(255, 255, 255, .3), 0 8px 32px rgba(0, 0, 0, .25);
        }
        .search-icon {
            color: var(--text-muted);
            font-size: 16px;
            margin-right: 10px;
        }
        .search-input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 12px 0;
            font-size: 15px;
            color: var(--text);
            outline: none;
            min-width: 0;
        }
        .search-input::placeholder {
            color: var(--text-muted);
        }
        .search-btn {
            background: var(--gradient);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all .25s ease;
            white-space: nowrap;
        }
        .search-btn:hover {
            transform: scale(1.03);
            box-shadow: 0 6px 20px rgba(79, 70, 229, .4);
        }
        .search-btn:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .5);
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 44px;
        }
        .section-tag {
            display: inline-block;
            background: rgba(79, 70, 229, .08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 5px 14px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-title {
            font-size: clamp(24px, 3.4vw, 34px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.3px;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-sub {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-cta-link {
            display: inline-block;
            margin-top: 8px;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            transition: gap .2s ease;
            gap: 6px;
        }
        .section-cta-link:hover {
            color: var(--primary-dark);
        }
        .stats-section {
            position: relative;
            z-index: 3;
            margin-top: -46px;
            padding-bottom: 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: #fff;
            border-radius: 22px;
            padding: 34px 28px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
        }
        .stat-card {
            text-align: center;
            padding: 12px 8px;
            border-right: 1px solid var(--border);
        }
        .stat-card:last-child {
            border-right: none;
        }
        .stat-number {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 4px;
            white-space: nowrap;
        }
        .category-section {
            padding-top: 20px;
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 0;
            background: var(--gradient);
            transition: height .3s ease;
            border-radius: 0 4px 4px 0;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, .2);
        }
        .category-card:hover::before {
            height: 100%;
        }
        .category-icon {
            width: 58px;
            height: 58px;
            background: rgba(79, 70, 229, .1);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            transition: all .3s ease;
        }
        .category-card:hover .category-icon {
            background: var(--gradient);
            color: #fff;
            transform: scale(1.05);
        }
        .category-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }
        .category-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: auto;
            padding-top: 8px;
        }
        .category-link i {
            transition: transform .2s ease;
            font-size: 12px;
        }
        .category-card:hover .category-link i {
            transform: translateX(4px);
        }
        .faq-section {
            background: linear-gradient(180deg, var(--bg) 0%, #f0f2fb 100%);
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 32px;
            align-items: start;
        }
        .faq-main {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 20px;
        }
        .accordion {
            background: transparent;
        }
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all .3s ease;
        }
        .accordion-item.is-active {
            border-color: rgba(79, 70, 229, .3);
            box-shadow: 0 4px 16px rgba(79, 70, 229, .08);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: #fff;
            position: relative;
            cursor: pointer;
            transition: color .2s ease;
            border-radius: 14px;
        }
        .accordion-title::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            position: absolute;
            right: 22px;
            color: var(--primary);
            transition: transform .3s ease;
        }
        .accordion-item.is-active .accordion-title {
            color: var(--primary);
        }
        .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
        }
        .accordion-content {
            padding: 0 24px 22px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            background: #fafbfe;
        }
        .accordion-content p {
            padding: 16px 0 0;
        }
        .faq-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 90px;
        }
        .help-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .help-card-icon {
            width: 64px;
            height: 64px;
            background: var(--gradient);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: #fff;
            margin: 0 auto 18px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, .3);
        }
        .help-card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .help-card-text {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .help-card-btn {
            display: inline-block;
            background: var(--gradient);
            color: #fff;
            border-radius: 50px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            width: 100%;
            text-align: center;
        }
        .help-card-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .35);
        }
        .timing-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            font-size: 14px;
            color: var(--text-light);
        }
        .timing-card li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .timing-card li:last-child {
            border-bottom: none;
        }
        .timing-card li i {
            color: var(--primary);
            margin-right: 8px;
        }
        .timing-card strong {
            color: var(--text);
            font-weight: 600;
        }
        .process-section {
            background: #fff;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 20px;
        }
        .process-step {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all .3s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            background: #fff;
        }
        .step-num {
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: rgba(79, 70, 229, .1);
            border-radius: 999px;
            padding: 3px 12px;
        }
        .step-icon {
            width: 60px;
            height: 60px;
            background: #fff;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(15, 23, 42, .08);
        }
        .step-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }
        .articles-section {
            background: var(--bg);
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all .3s ease;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, .18);
        }
        .article-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .article-card:hover .article-thumb img {
            transform: scale(1.06);
        }
        .article-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .15), transparent 50%);
        }
        .article-body {
            padding: 26px 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }
        .article-tag {
            background: rgba(6, 182, 212, .1);
            color: #0891b2;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            padding: 3px 12px;
        }
        .article-date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .article-title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--text);
            display: -webkit-box;
            overflow: hidden;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .article-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 16px;
            display: -webkit-box;
            overflow: hidden;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .article-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-link i {
            transition: transform .2s ease;
        }
        .article-card:hover .article-link i {
            transform: translateX(4px);
        }
        .cta-section {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: var(--space-section) 0;
            color: #fff;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(67, 56, 202, .92), rgba(6, 182, 212, .85));
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .cta-text {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 34px;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 50px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-white {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, .12);
        }
        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, .2);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, .7);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-3px);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
        }
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, .6);
            padding: 56px 0 28px;
            margin-top: auto;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--accent-light);
            margin-right: 4px;
        }
        .footer-top > div:first-child p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 280px;
        }
        .footer-col h4 {
            color: #e2e8f0;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .5);
            font-size: 13px;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, .35);
            z-index: 90;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all .3s ease;
            cursor: pointer;
            border: none;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }
        .back-top:hover {
            transform: translateY(-4px);
        }
        @media (max-width: 1100px) {
            .service-grid,
            .category-grid,
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-card {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding-bottom: 18px;
            }
            .stat-card:nth-last-child(-n+2) {
                border-bottom: none;
                padding-bottom: 8px;
            }
            .faq-layout {
                grid-template-columns: 1fr;
            }
            .faq-side {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 30px rgba(0, 0, 0, .1);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-area {
                margin-left: 0;
                padding-top: 64px;
            }
            .page-hero {
                padding-top: 70px;
            }
            .sidebar-overlay.show {
                display: block;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .category-grid,
            .service-grid,
            .article-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
                padding: 24px 16px;
            }
            .faq-main {
                padding: 12px;
            }
            .accordion-title {
                padding: 18px 20px;
                font-size: 15px;
                padding-right: 40px;
            }
            .accordion-content {
                padding: 0 20px 18px;
            }
            .faq-side {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .hero-search {
                flex-direction: column;
                background: transparent;
                border-radius: 20px;
                padding: 0;
                gap: 12px;
                box-shadow: none;
            }
            .search-input {
                background: #fff;
                border-radius: 50px;
                padding: 14px 20px;
                width: 100%;
            }
            .search-icon {
                display: none;
            }
            .search-btn {
                width: 100%;
            }
            .hero-search:focus-within {
                box-shadow: none;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .section-tag {
                font-size: 12px;
            }
            .btn-group {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                justify-content: center;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                padding: 18px 12px;
            }
            .stat-number {
                font-size: 26px;
            }
            .stat-label {
                font-size: 13px;
                white-space: normal;
            }
            .category-card,
            .help-card,
            .timing-card {
                padding: 22px 18px;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 15px;
            }
        }