/* roulang page: index */
:root {
  --primary: #1e5ef3;
  --primary-dark: #1448c0;
  --accent: #f7b500;
  --accent-light: #fff4d6;
  --bg: #f2f5f9;
  --bg-white: #ffffff;
  --text: #1c2536;
  --text-weak: #64748b;
  --border: #e3e9f1;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(15, 35, 70, 0.05);
  --shadow-md: 0 8px 28px rgba(15, 35, 70, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 35, 70, 0.12);
  --header-h: 76px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color .2s ease; }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section.light { background: var(--bg); }
.section.white { background: var(--bg-white); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(15, 35, 70, 0.06);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  height: var(--header-h);
}
.site-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text);
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.site-logo:hover { opacity: .85; }
.nav-left, .nav-right { display: flex; align-items: center; gap: 8px; }
.nav-item {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: all .22s ease;
}
.nav-item:hover { color: var(--primary); background: rgba(30, 94, 243, .06); }
.nav-item.active {
  color: var(--primary);
  background: rgba(30, 94, 243, .1);
  font-weight: 600;
}
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  font-size: 18px;
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
}
.menu-toggle:hover { background: var(--bg); }
.mobile-menu {
  display: none;
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  padding: 12px 24px 20px;
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-link {
  display: block;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid #f1f4f8;
}
.mobile-link:last-child { border-bottom: none; }
.mobile-link:hover { background: rgba(30, 94, 243, .05); color: var(--primary); }
.mobile-link.active { color: var(--primary); background: rgba(30, 94, 243, .08); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, rgba(8, 18, 40, 0.78), rgba(15, 35, 80, 0.58)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero-content { padding: 80px 0; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero-badge i { color: var(--accent); }
.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: 2px;
}
.hero p {
  font-size: 18px;
  line-height: 1.75;
  max-width: 560px;
  margin: 0 0 36px;
  color: rgba(255, 255, 255, 0.85);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all .25s ease;
  line-height: 1;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(30, 94, 243, 0.28);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(30, 94, 243, 0.35); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; transform: translateY(-2px); }
.btn-light {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}
.btn-light:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22); }

/* ===== Section header ===== */
.section-header { text-align: center; margin-bottom: 52px; }
.section-header.left { text-align: left; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: rgba(30, 94, 243, 0.08);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-header h2 {
  font-size: 34px;
  line-height: 1.3;
  margin: 0 0 14px;
  color: var(--text);
  font-weight: 800;
}
.section-header p {
  max-width: 660px;
  margin: 0 auto;
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.7;
}
.section-header.left p { margin: 0; }

/* ===== Intro Section ===== */
.intro-section { background: var(--bg-white); }
.intro-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}
.intro-media img { width: 100%; height: 100%; object-fit: cover; min-height: 300px; }
.intro-content { padding-left: 20px; }
.intro-content .section-tag { margin-bottom: 16px; }
.intro-content h2 { font-size: 32px; line-height: 1.3; margin: 0 0 18px; }
.intro-content > p { color: var(--text-weak); font-size: 16px; margin-bottom: 22px; }
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  color: var(--text);
  font-size: 15px;
}
.check-list li i { color: var(--primary); font-size: 16px; margin-top: 3px; }

/* ===== Categories ===== */
.categories-section { background: var(--bg); }
.category-card {
  display: block;
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all .3s ease;
  height: 100%;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 94, 243, 0.15);
}
.category-card-media { height: 180px; overflow: hidden; position: relative; }
.category-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.category-card:hover .category-card-media img { transform: scale(1.05); }
.category-card-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(15, 30, 60, 0.12));
}
.category-card-body { padding: 26px; }
.category-card h3 { font-size: 20px; margin: 0 0 10px; font-weight: 700; color: var(--text); }
.category-card p { font-size: 14px; color: var(--text-weak); line-height: 1.65; margin: 0 0 16px; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.card-link i { transition: transform .2s ease; }
.category-card:hover .card-link i { transform: translateX(4px); }

/* ===== Latest List ===== */
.latest-section { background: var(--bg-white); }
.latest-list {
  max-width: 900px;
  margin: 0 auto;
}
.latest-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin-bottom: 14px;
  transition: all .25s ease;
  box-shadow: var(--shadow-sm);
}
.latest-item:hover {
  border-color: rgba(30, 94, 243, 0.2);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.latest-tag {
  flex-shrink: 0;
  background: rgba(30, 94, 243, 0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  min-width: 72px;
  text-align: center;
}
.latest-title {
  flex: 1;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.latest-date {
  flex-shrink: 0;
  color: var(--text-weak);
  font-size: 13px;
}
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-weak);
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}

/* ===== Stats ===== */
.stats-section {
  padding: 72px 0;
  background: linear-gradient(120deg, rgba(10, 25, 50, 0.85), rgba(18, 40, 80, 0.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat fixed;
  color: #fff;
}
.stat-item {
  text-align: center;
  padding: 24px 12px;
}
.stat-number {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  color: #fff;
}
.stat-number span { color: var(--accent); }
.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 1px;
}

/* ===== Flow ===== */
.flow-section { background: var(--bg-white); }
.flow-step { text-align: center; padding: 20px 22px; }
.step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 20px;
  box-shadow: 0 10px 24px rgba(30, 94, 243, 0.25);
}
.flow-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.flow-step p { font-size: 14px; color: var(--text-weak); line-height: 1.6; margin: 0; }

/* ===== Features ===== */
.features-section { background: var(--bg); }
.feature-block { margin-bottom: 48px; }
.feature-block:last-child { margin-bottom: 0; }
.feature-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.feature-media img { width: 100%; height: 100%; object-fit: cover; min-height: 250px; }
.feature-content h3 { font-size: 26px; font-weight: 700; color: var(--text); margin: 0 0 16px; }
.feature-content p { color: var(--text-weak); font-size: 15px; line-height: 1.7; margin-bottom: 18px; }
.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text);
}
.feature-list li i { color: var(--primary); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-white); }
.faq-col { margin-bottom: 24px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-white);
  transition: all .25s ease;
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item:hover { border-color: rgba(30, 94, 243, 0.2); box-shadow: var(--shadow-sm); }
.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background .2s ease;
}
.faq-question:hover { background: rgba(30, 94, 243, 0.02); }
.faq-question i { color: var(--primary); font-size: 14px; transition: transform .3s ease; }
.faq-item.open .faq-question i { transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section {
  padding: 84px 0;
  background: linear-gradient(120deg, rgba(14, 32, 70, 0.88), rgba(25, 50, 100, 0.74)), url('/assets/images/backpic/back-3.png') center/cover no-repeat fixed;
  color: #fff;
  text-align: center;
}
.cta-box h2 { font-size: 34px; margin: 0 0 14px; }
.cta-box p { font-size: 16px; color: rgba(255, 255, 255, 0.8); margin: 0 auto 28px; max-width: 520px; }

/* ===== Footer ===== */
.site-footer {
  background: #0d1b2e;
  color: #94a3b8;
  padding: 56px 0 28px;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.06);
  color: #cbd5e1;
  transition: all .2s ease;
}
.footer-links a:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #64748b;
}
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section { padding: 70px 0; }
  .hero { min-height: 520px; }
  .hero h1 { font-size: 44px; }
  .section-header h2 { font-size: 28px; }
  .stat-number { font-size: 36px; }
}
@media (max-width: 768px) {
  .section { padding: 54px 0; }
  .nav-left, .nav-right { display: none; }
  .menu-toggle { display: flex; }
  .header-inner { justify-content: space-between; }
  .site-logo { position: static; transform: none; font-size: 19px; }
  .hero { min-height: 440px; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 16px; }
  .hero-content { padding: 50px 0; }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 24px; }
  .intro-content { padding-left: 0; margin-top: 24px; }
  .latest-item { flex-wrap: wrap; gap: 10px; }
  .latest-title { white-space: normal; flex-basis: 100%; order: 2; }
  .latest-date { margin-left: auto; }
  .stat-number { font-size: 30px; }
  .feature-content { margin-top: 20px; }
  .feature-block { margin-bottom: 36px; }
  .footer-top { flex-direction: column; align-items: flex-start; }
  .cta-box h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; height: 64px; }
  .mobile-menu { top: 64px; }
  .btn { padding: 12px 22px; font-size: 14px; }
  .hero h1 { font-size: 28px; letter-spacing: 1px; }
  .hero p { font-size: 15px; }
  .hero-badge { font-size: 12px; padding: 6px 14px; }
  .section-header h2 { font-size: 22px; }
  .card-link { font-size: 13px; }
  .latest-tag { min-width: 60px; font-size: 11px; }
  .latest-title { font-size: 14px; }
  .latest-date { font-size: 12px; }
  .stat-number { font-size: 26px; }
  .faq-question { font-size: 14px; padding: 16px 16px; }
  .faq-answer { padding: 0 16px 16px; font-size: 13px; }
}

/* roulang page: category1 */
:root {
      --primary: #0f2b46;
      --primary-light: #1b3f62;
      --accent: #f0a500;
      --accent-light: #ffd166;
      --cyan: #0ba5be;
      --bg: #f6f8fb;
      --bg-soft: #eef2f6;
      --text: #1f2a37;
      --text-weak: #64748b;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 10px 30px rgba(15, 43, 70, 0.08);
      --shadow-hover: 0 16px 36px rgba(15, 43, 70, 0.14);
      --transition: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

    img {
      max-width: 100%;
      display: block;
      border-radius: var(--radius);
    }

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

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

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

    /* ---------- Header ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
    }

    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      height: 76px;
    }

    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-item {
      padding: 8px 18px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-weak);
      border-radius: 999px;
      line-height: 1.4;
    }

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

    .nav-item.active {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(15, 43, 70, 0.2);
    }

    .brand-logo {
      font-size: 24px;
      font-weight: 800;
      letter-spacing: 0.02em;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .brand-logo i {
      color: var(--accent);
      font-size: 20px;
    }

    .search-form {
      display: flex;
      align-items: center;
      background: var(--bg-soft);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 4px 4px 4px 16px;
      width: 220px;
      transition: var(--transition);
    }

    .search-form:focus-within {
      border-color: var(--cyan);
      background: #fff;
      box-shadow: 0 0 0 3px rgba(11, 165, 190, 0.14);
    }

    .search-form input {
      border: none;
      background: transparent;
      outline: none;
      width: 100%;
      font-size: 14px;
      color: var(--text);
    }

    .search-form input::placeholder {
      color: var(--text-weak);
    }

    .search-form button {
      background: var(--primary);
      border: none;
      color: #fff;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: var(--transition);
      flex-shrink: 0;
    }

    .search-form button:hover {
      background: var(--accent);
    }

    /* ---------- Page Banner ---------- */
    .page-banner {
      background-size: cover;
      background-position: center;
      padding: 92px 0 72px;
      position: relative;
      text-align: center;
    }

    .page-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(15, 43, 70, 0.78), rgba(15, 43, 70, 0.62));
    }

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

    .breadcrumb {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 8px;
      color: rgba(255, 255, 255, 0.78);
      font-size: 14px;
      margin-bottom: 16px;
    }

    .breadcrumb a {
      color: rgba(255, 255, 255, 0.9);
      border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    }

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

    .page-banner h1 {
      font-size: 40px;
      font-weight: 800;
      color: #fff;
      line-height: 1.25;
      margin: 0 0 16px;
      letter-spacing: 0.01em;
    }

    .page-banner p {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.86);
      max-width: 640px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* ---------- Sections ---------- */
    .page-main .section {
      padding: 84px 0;
    }

    .section-alt {
      background: #fff;
    }

    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }

    .section-head .tag {
      display: inline-block;
      background: rgba(11, 165, 190, 0.1);
      color: var(--cyan);
      font-size: 13px;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 999px;
      letter-spacing: 0.03em;
      margin-bottom: 14px;
    }

    .section-head h2 {
      font-size: 34px;
      font-weight: 800;
      color: var(--primary);
      margin: 0 0 12px;
      line-height: 1.3;
    }

    .section-head p {
      font-size: 16px;
      color: var(--text-weak);
      margin: 0;
    }

    .guide-block {
      display: flex;
      align-items: center;
      gap: 48px;
    }

    .guide-image {
      flex: 0 0 48%;
      position: relative;
    }

    .guide-image img {
      width: 100%;
      object-fit: cover;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

    .guide-image img:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .guide-content {
      flex: 1;
    }

    .guide-content h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin: 0 0 14px;
      line-height: 1.35;
    }

    .guide-content p {
      font-size: 15.5px;
      color: var(--text-weak);
      margin-bottom: 20px;
    }

    .guide-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 8px 16px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: 0 2px 8px rgba(15, 43, 70, 0.05);
    }

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

    /* ---------- Feature Cards ---------- */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 8px;
    }

    .feature-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 22px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.35s ease;
    }

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

    .feature-card:hover::after {
      transform: scaleX(1);
    }

    .feature-card img {
      height: 180px;
      width: 100%;
      object-fit: cover;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin: 0 0 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-weak);
      margin: 0;
      line-height: 1.7;
    }

    /* ---------- Steps ---------- */
    .steps-list {
      max-width: 820px;
      margin: 0 auto;
      position: relative;
    }

    .steps-list::before {
      content: "";
      position: absolute;
      left: 24px;
      top: 20px;
      bottom: 20px;
      width: 2px;
      background: linear-gradient(180deg, var(--primary), var(--cyan), transparent);
    }

    .step-item {
      display: flex;
      gap: 20px;
      padding: 18px 0;
      position: relative;
    }

    .step-num {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      box-shadow: 0 6px 14px rgba(15, 43, 70, 0.24);
      flex-shrink: 0;
      z-index: 1;
    }

    .step-body {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px 24px;
      flex: 1;
      box-shadow: 0 4px 12px rgba(15, 43, 70, 0.04);
      transition: var(--transition);
    }

    .step-body:hover {
      box-shadow: var(--shadow);
    }

    .step-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin: 0 0 6px;
    }

    .step-body p {
      font-size: 14px;
      color: var(--text-weak);
      margin: 0;
    }

    /* ---------- FAQ ---------- */
    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }

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

    .faq-item:hover {
      border-color: rgba(11, 165, 190, 0.4);
    }

    .faq-item summary {
      cursor: pointer;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      list-style: none;
      user-select: none;
    }

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

    .faq-item summary::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 13px;
      color: var(--text-weak);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }

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

    .faq-body {
      padding: 0 24px 22px;
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.8;
    }

    /* ---------- CTA ---------- */
    .cta-section {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 55%, #246a80 100%);
      padding: 70px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(240, 165, 0, 0.22), transparent 60%);
      top: -160px;
      right: -120px;
      border-radius: 50%;
    }

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

    .cta-section h2 {
      color: #fff;
      font-size: 30px;
      font-weight: 800;
      margin: 0 0 12px;
    }

    .cta-section p {
      color: rgba(255, 255, 255, 0.85);
      font-size: 16px;
      margin: 0 auto 30px;
      max-width: 520px;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 999px;
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      border: 2px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      background: none;
      line-height: 1.4;
    }

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

    .btn-white:hover {
      background: var(--accent-light);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
    }

    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.7);
      color: #fff;
    }

    .btn-outline-white:hover {
      border-color: #fff;
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
    }

    /* ---------- Footer ---------- */
    .site-footer {
      background: #0b1d2f;
      padding: 48px 0 24px;
      color: rgba(255, 255, 255, 0.72);
    }

    .footer-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 28px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.12);
      margin-bottom: 22px;
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: #fff;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

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

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }

    .footer-links a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.65);
    }

    .footer-links a:hover {
      color: var(--accent-light);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 1024px) {
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .guide-block {
        gap: 28px;
      }
    }

    @media (max-width: 768px) {
      .site-header .container {
        height: auto;
        flex-wrap: wrap;
        padding: 14px 20px;
        gap: 14px;
      }

      .nav-left {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
      }

      .brand-logo {
        font-size: 20px;
      }

      .search-form {
        width: 160px;
      }

      .page-banner {
        padding: 64px 0 48px;
      }

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

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

      .page-main .section {
        padding: 56px 0;
      }

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

      .guide-block {
        flex-direction: column;
        gap: 24px;
      }

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

      .steps-list::before {
        left: 18px;
      }

      .step-num {
        width: 38px;
        height: 38px;
        font-size: 14px;
      }

      .step-body {
        padding: 16px 18px;
      }

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

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

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

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

      .nav-item {
        padding: 6px 12px;
        font-size: 14px;
      }

      .search-form {
        display: none;
      }

      .brand-logo {
        margin: 0 auto;
      }

      .site-header .nav-left {
        order: 2;
      }

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

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

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --primary-bg: #eff6ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --dark: #0f172a;
  --text: #334155;
  --muted: #94a3b8;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: inline-block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.grid-container { max-width: 1200px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: var(--transition);
  line-height: 1.4;
}
.btn:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 3px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(37, 99, 235, 0.3); }
.btn-white { background: #fff; color: var(--primary); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12); }
.btn-white:hover { background: var(--primary-bg); transform: translateY(-2px); }
.btn-outline-light { border-color: rgba(255, 255, 255, 0.7); color: #fff; background: transparent; }
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }
.btn-outline { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary-bg); transform: translateY(-2px); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-bg);
  color: var(--primary);
}
.badge-accent { background: var(--accent-light); color: #b45309; }
.badge-neutral { background: #f1f5f9; color: var(--text); }

.text-link { color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.text-link:hover { color: var(--primary-dark); gap: 10px; }

/* 阅读进度条 */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  width: 0;
  z-index: 1000;
  transition: width 0.1s linear;
}

/* 顶部导航 */
.site-header {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 76px;
  display: flex;
  align-items: center;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.nav-logo i { color: var(--primary); font-size: 24px; }
.nav-logo:hover { color: var(--primary); }
.nav-item {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  transition: var(--transition);
}
.nav-item:hover { color: var(--primary); background: var(--primary-bg); }
.nav-item.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
.nav-left, .nav-right { display: flex; align-items: center; gap: 4px; }
.nav-right { justify-content: flex-end; }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--dark);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.menu-toggle:hover { background: var(--primary-bg); border-color: var(--primary); color: var(--primary); }

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  position: absolute;
  top: 76px;
  left: 0;
  right: 0;
  box-shadow: var(--shadow);
  z-index: 99;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.mobile-menu a:hover { background: var(--primary-bg); color: var(--primary); }
.mobile-menu a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }

/* 文章 Banner */
.article-banner {
  background:
    linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 64, 175, 0.75) 50%, rgba(245, 158, 11, 0.35) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 90px 0 80px;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.article-banner::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--bg));
}
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.8); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { opacity: 0.5; }
.article-banner h1 {
  font-size: 38px;
  line-height: 1.35;
  font-weight: 800;
  max-width: 860px;
  margin: 0 auto 20px;
  letter-spacing: 0.5px;
  color: #fff;
}
.article-banner-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
}
.article-banner-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(255, 255, 255, 0.12);
  padding: 6px 16px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.article-banner-meta i { opacity: 0.8; }

/* 文章主体 */
.article-body-section { padding: 56px 0 72px; }
.article-grid { gap: 32px; }
.article-main-col { flex: 0 0 calc(66.666% - 16px); max-width: calc(66.666% - 16px); }
.article-side-col { flex: 0 0 calc(33.333% - 16px); max-width: calc(33.333% - 16px); }

.article-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 48px;
  border: 1px solid rgba(226, 232, 240, 0.5);
}
.article-content {
  font-size: 16px;
  color: var(--text);
  line-height: 1.9;
}
.article-content p { margin: 0 0 20px; }
.article-content h2 {
  font-size: 25px;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--dark);
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 28px 0 14px;
  color: var(--dark);
}
.article-content ul, .article-content ol { margin: 0 0 20px; padding-left: 24px; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-light);
  padding: 18px 22px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
  color: #78350f;
  font-style: italic;
}
.article-content a { color: var(--primary); text-decoration: underline; }
.article-content a:hover { color: var(--primary-dark); }
.article-content img { border-radius: var(--radius); box-shadow: var(--shadow-sm); margin: 20px 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content table th { background: var(--primary-bg); font-weight: 600; color: var(--dark); }

.article-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.article-footer-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--primary-bg);
  transition: var(--transition);
}
.article-footer-nav a:hover { background: var(--primary); color: #fff; }

/* 侧边栏 */
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  border: 1px solid rgba(226, 232, 240, 0.5);
}
.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-title i { color: var(--primary); }
.info-list { list-style: none; margin: 0; padding: 0; }
.info-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  font-size: 15px;
  border-bottom: 1px dashed var(--border);
}
.info-list li:last-child { border-bottom: none; }
.info-list i { color: var(--primary); width: 18px; text-align: center; }
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
  transition: var(--transition);
  background: #f8fafc;
}
.sidebar-link i { color: var(--primary); width: 16px; text-align: center; }
.sidebar-link:hover { background: var(--primary-bg); color: var(--primary); transform: translateX(4px); }
.sidebar-safe {
  background: linear-gradient(135deg, var(--primary-bg), #f0f7ff);
  border: 1px solid #dbeafe;
  text-align: center;
  padding: 30px 24px;
}
.sidebar-safe i { font-size: 34px; color: var(--primary); margin-bottom: 14px; }
.sidebar-safe h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin: 0 0 10px; }
.sidebar-safe p { font-size: 14px; color: var(--text); margin: 0; line-height: 1.7; }

/* 内容未找到 */
.not-found-box {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 60px 40px;
  text-align: center;
  border: 1px dashed var(--border);
}
.not-found-box i { font-size: 50px; color: var(--muted); margin-bottom: 18px; display: block; }
.not-found-box h2 { font-size: 26px; font-weight: 700; color: var(--dark); margin: 0 0 12px; }
.not-found-box p { color: var(--muted); margin: 0 0 28px; }

/* 推荐阅读区 */
.recommend-section { background: var(--white); padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-head h2 { font-size: 32px; font-weight: 800; color: var(--dark); margin: 0 0 12px; }
.section-head p { font-size: 16px; color: var(--muted); max-width: 620px; margin: 0 auto; }

.rec-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.rec-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}
.rec-card .rec-thumb { overflow: hidden; aspect-ratio: 16/10; position: relative; }
.rec-card .rec-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.rec-card:hover .rec-thumb img { transform: scale(1.06); }
.rec-card .rec-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.2), transparent);
  pointer-events: none;
}
.rec-body { padding: 26px 26px 30px; display: flex; flex-direction: column; flex: 1; }
.rec-body .badge { align-self: flex-start; margin-bottom: 14px; }
.rec-body h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin: 0 0 10px; }
.rec-body p { font-size: 14px; color: var(--muted); line-height: 1.7; margin: 0 0 18px; flex: 1; }
.rec-body .text-link { margin-top: auto; }

/* CTA 区 */
.cta-section { padding: 88px 0; background: linear-gradient(135deg, var(--dark) 0%, #1e3a8a 60%, var(--primary) 100%); }
.cta-box {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  backdrop-filter: blur(8px);
}
.cta-box h2 { font-size: 30px; font-weight: 800; color: #fff; margin: 0 0 14px; }
.cta-box p { font-size: 16px; color: rgba(255, 255, 255, 0.8); max-width: 600px; margin: 0 auto 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* FAQ 区 */
.faq-section { background: var(--bg); padding: 80px 0; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 0;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); border-color: rgba(37, 99, 235, 0.3); }
.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: '\f059';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}
.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  margin-left: auto;
  font-size: 13px;
  color: var(--muted);
  transition: transform 0.3s;
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item summary:hover { background: var(--primary-bg); }
.faq-item .faq-answer { padding: 0 24px 22px 54px; font-size: 15px; color: var(--text); line-height: 1.8; border-top: 1px solid var(--border); margin-top: 4px; padding-top: 16px; }

/* 页脚 */
.site-footer { background: var(--dark); color: rgba(255, 255, 255, 0.65); padding: 64px 0 0; }
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
}
.footer-logo { font-size: 22px; font-weight: 800; color: #fff; }
.footer-links { display: flex; gap: 12px; flex-wrap: wrap; }
.footer-links a {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  transition: var(--transition);
}
.footer-links a:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 10px;
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .article-banner h1 { font-size: 32px; }
  .article-card { padding: 36px; }
  .cta-box { padding: 48px 32px; }
}

@media (max-width: 900px) {
  .site-header { height: 64px; }
  .menu-toggle { display: inline-flex; }
  .nav-left, .nav-right { display: none; }
  .mobile-menu { top: 64px; }
  .article-banner { padding: 68px 0 60px; }
  .article-banner h1 { font-size: 28px; }
  .article-body-section { padding: 40px 0 56px; }
  .article-main-col, .article-side-col { flex: 0 0 100%; max-width: 100%; }
  .sidebar { flex-direction: row; flex-wrap: wrap; gap: 16px; }
  .sidebar-card { flex: 0 0 calc(50% - 8px); }
  .sidebar-safe { flex: 0 0 100%; }
  .faq-grid { grid-template-columns: 1fr; }
  .article-footer-nav { flex-direction: column; align-items: stretch; }
  .article-footer-nav a { text-align: center; }
}

@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .grid-container { padding: 0 18px; }
  .article-card { padding: 28px 22px; border-radius: var(--radius); }
  .article-content { font-size: 15px; line-height: 1.85; }
  .article-content h2 { font-size: 21px; }
  .recommend-section { padding: 60px 0; }
  .section-head h2 { font-size: 25px; }
  .cta-section { padding: 60px 0; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 24px; }
  .faq-section { padding: 60px 0; }
  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-item .faq-answer { padding-left: 40px; }
}

@media (max-width: 520px) {
  .article-banner { padding: 56px 0 48px; }
  .article-banner h1 { font-size: 23px; }
  .article-banner-meta { gap: 10px; }
  .article-banner-meta span { padding: 5px 12px; font-size: 12px; }
  .sidebar-card { flex: 0 0 100%; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; justify-content: center; }
  .footer-top { flex-direction: column; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category2 */
:root {
            --primary: #2b6ef2;
            --primary-dark: #1e56c8;
            --primary-soft: #e9f0ff;
            --accent: #ffb020;
            --accent-soft: #fff5e0;
            --bg-body: #f5f7fb;
            --bg-white: #ffffff;
            --bg-soft: #eef2f8;
            --dark-bg: #101a2e;
            --text-main: #182236;
            --text-muted: #5c6b82;
            --border: #e3e8f0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(16, 26, 46, .06);
            --shadow-md: 0 8px 24px rgba(16, 26, 46, .08);
            --shadow-lg: 0 16px 40px rgba(16, 26, 46, .12);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

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

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

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

        .section {
            padding: 88px 0;
        }

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

        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 700;
            letter-spacing: 2px;
            font-size: .85rem;
            text-transform: uppercase;
            background: var(--primary-soft);
            padding: 6px 16px;
            border-radius: 999px;
        }

        .section-label i {
            font-size: .8rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin: 14px 0 12px;
            line-height: 1.3;
            letter-spacing: .5px;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.02rem;
            line-height: 1.8;
            margin: 0;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 10px rgba(16, 26, 46, .03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 20px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-start;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-item {
            padding: 8px 18px;
            border-radius: 999px;
            color: var(--text-muted);
            font-weight: 600;
            font-size: .95rem;
            transition: all .25s ease;
            text-decoration: none;
        }

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

        .nav-item:focus-visible {
            outline: 3px solid rgba(43, 110, 242, .4);
            outline-offset: 2px;
        }

        .nav-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(43, 110, 242, .28);
        }

        .site-logo {
            font-size: 1.42rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 1px;
            text-decoration: none;
            white-space: nowrap;
            transition: color .25s ease;
        }

        .site-logo:hover {
            color: var(--primary);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            width: 42px;
            height: 42px;
            font-size: 1.1rem;
            color: var(--text-main);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all .25s ease;
        }

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

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(16, 26, 46, .88), rgba(24, 48, 112, .82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 110px 0;
            color: #fff;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: .88rem;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 26px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
            text-decoration: none;
            transition: color .2s;
        }

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

        .breadcrumb span {
            opacity: .5;
        }

        .hero-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 18px;
            letter-spacing: 1px;
        }

        .hero-title span {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, .85);
            max-width: 660px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        .button {
            border-radius: 999px;
            padding: 13px 32px;
            font-weight: 700;
            font-size: .96rem;
            transition: all .3s ease;
            margin: 0;
            border: none;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }

        .button.primary-btn {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(43, 110, 242, .3);
        }

        .button.primary-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(43, 110, 242, .36);
        }

        .button.outline-btn {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, .85);
            color: #fff;
            padding: 11px 30px;
        }

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

        .button:focus-visible {
            outline: 3px solid rgba(255, 176, 32, .6);
            outline-offset: 3px;
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 30px 28px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: all .3s ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(43, 110, 242, .3);
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            background: var(--primary);
            margin-bottom: 20px;
            box-shadow: 0 8px 18px rgba(43, 110, 242, .22);
        }

        .feature-icon.orange {
            background: #ff8a3d;
            box-shadow: 0 8px 18px rgba(255, 138, 61, .22);
        }

        .feature-icon.green {
            background: #22b07d;
            box-shadow: 0 8px 18px rgba(34, 176, 125, .22);
        }

        .feature-icon.purple {
            background: #8b5cf6;
            box-shadow: 0 8px 18px rgba(139, 92, 246, .22);
        }

        .feature-card h3 {
            font-size: 1.16rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: .93rem;
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Steps ===== */
        .steps-wrap {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }

        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .step-item {
            position: relative;
            padding: 28px 24px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border-top: 3px solid var(--primary);
            transition: all .3s ease;
        }

        .step-item:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            opacity: .2;
            line-height: 1;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text-main);
        }

        .step-item p {
            font-size: .88rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== Guide Cards ===== */
        .guide-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: all .3s ease;
        }

        .guide-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(43, 110, 242, .25);
        }

        .guide-cover {
            height: 185px;
            overflow: hidden;
            position: relative;
        }

        .guide-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(16, 26, 46, .18), transparent 55%);
            opacity: 0;
            transition: opacity .3s ease;
        }

        .guide-card:hover .guide-cover::after {
            opacity: 1;
        }

        .guide-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .guide-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .78rem;
            font-weight: 600;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 5px 14px;
            border-radius: 999px;
            align-self: flex-start;
            margin-bottom: 14px;
        }

        .guide-title {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
            line-height: 1.5;
        }

        .guide-desc {
            color: var(--text-muted);
            font-size: .9rem;
            line-height: 1.75;
            flex: 1;
            margin: 0;
        }

        .guide-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            margin-top: 16px;
            border-top: 1px dashed var(--border);
            color: var(--text-muted);
            font-size: .84rem;
        }

        .guide-meta .btn-link {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            transition: color .2s;
        }

        .guide-meta .btn-link:hover {
            color: var(--primary-dark);
        }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--dark-bg);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(43, 110, 242, .28), transparent 70%);
            border-radius: 50%;
        }

        .stats-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -70px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(255, 176, 32, .18), transparent 70%);
            border-radius: 50%;
        }

        .stat-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 30px 16px;
        }

        .stat-icon {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .stat-number {
            font-size: 2.7rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: 1px;
        }

        .stat-number em {
            font-style: normal;
            color: var(--accent);
            font-size: 1.6rem;
            margin-left: 2px;
        }

        .stat-label {
            color: rgba(255, 255, 255, .7);
            font-size: .92rem;
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        details.faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 28px;
            margin-bottom: 14px;
            transition: all .3s ease;
            box-shadow: var(--shadow-sm);
        }

        details.faq-item:hover {
            border-color: rgba(43, 110, 242, .22);
        }

        details.faq-item[open] {
            border-color: rgba(43, 110, 242, .3);
            box-shadow: var(--shadow-md);
        }

        details.faq-item summary {
            cursor: pointer;
            font-weight: 700;
            color: var(--text-main);
            list-style: none;
            position: relative;
            padding-right: 36px;
            font-size: 1rem;
            line-height: 1.5;
        }

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

        details.faq-item summary::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: 0;
            top: 2px;
            font-size: 1rem;
            color: var(--primary);
            transition: transform .3s ease;
        }

        details.faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            color: var(--text-muted);
            line-height: 1.85;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            font-size: .94rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, #1e56c8, #3d7bff);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            color: #fff;
            box-shadow: 0 20px 50px rgba(43, 110, 242, .3);
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -70px;
            left: -50px;
            width: 220px;
            height: 220px;
            background: rgba(255, 176, 32, .14);
            border-radius: 50%;
        }

        .cta-box .section-label {
            background: rgba(255, 255, 255, .16);
            color: #fff;
        }

        .cta-title {
            font-size: 1.9rem;
            font-weight: 800;
            margin: 16px 0 12px;
            line-height: 1.4;
        }

        .cta-desc {
            color: rgba(255, 255, 255, .85);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }

        .cta-box .button.white-btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
        }

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

        .cta-box .button.ghost-btn {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, .8);
            color: #fff;
        }

        .cta-box .button.ghost-btn:hover {
            background: #fff;
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0e1626;
            color: rgba(255, 255, 255, .7);
            padding: 48px 0 30px;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            padding-bottom: 26px;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
        }

        .footer-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
        }

        .footer-links {
            display: flex;
            gap: 8px 24px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .7);
            text-decoration: none;
            font-size: .92rem;
            transition: all .2s;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 26px;
            font-size: .85rem;
            color: rgba(255, 255, 255, .45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .5);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.3rem;
            }

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

            .section {
                padding: 72px 0;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 14px 0;
            }

            .site-logo {
                order: -1;
                margin: 0 auto;
            }

            .nav-left,
            .nav-right {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: center;
                gap: 4px;
                padding: 10px 0;
                border-top: 1px solid var(--border);
                margin-top: 10px;
            }

            .nav-left.open,
            .nav-right.open {
                display: flex;
            }

            .nav-item {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
            }

            .menu-toggle {
                display: flex;
                position: absolute;
                right: 4px;
                top: 18px;
            }

            .menu-toggle.open .fa-bars {
                display: none;
            }

            .menu-toggle .fa-xmark {
                display: none;
            }

            .menu-toggle.open .fa-xmark {
                display: inline-block;
            }

            .page-hero {
                padding: 78px 0;
            }

            .hero-title {
                font-size: 1.9rem;
            }

            .hero-sub {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 1.55rem;
            }

            .steps-wrap {
                padding: 26px;
            }

            .step-list {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 44px 24px;
            }

            .cta-title {
                font-size: 1.5rem;
            }

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

            .footer-links {
                justify-content: center;
            }

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

        @media (max-width: 520px) {
            .page-hero {
                padding: 60px 0;
            }

            .hero-title {
                font-size: 1.5rem;
            }

            .hero-sub {
                font-size: .94rem;
            }

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

            .hero-actions .button {
                justify-content: center;
            }

            .section {
                padding: 46px 0;
            }

            .stat-number {
                font-size: 2.1rem;
            }

            .feature-card {
                padding: 22px 20px;
            }

            .guide-cover {
                height: 150px;
            }

            .cta-box {
                padding: 36px 20px;
                border-radius: var(--radius-md);
            }

            .cta-title {
                font-size: 1.3rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1e6feb;
            --primary-dark: #1456b8;
            --accent: #f5a623;
            --dark: #081c2e;
            --dark-soft: #0f2a44;
            --bg: #f4f8fc;
            --white: #ffffff;
            --text: #14293e;
            --muted: #64758a;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(8, 28, 46, .08);
            --shadow-lg: 0 22px 50px rgba(8, 28, 46, .12);
            --space: clamp(56px, 8vw, 96px);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: all .25s ease;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all .3s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px rgba(30, 111, 235, .25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(30, 111, 235, .3);
        }
        .btn-light-primary {
            background: #eaf2ff;
            color: var(--primary);
        }
        .btn-light-primary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, .85);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: #fff;
            color: var(--dark);
            transform: translateY(-2px);
        }
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(30, 111, 235, .5);
            outline-offset: 2px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }
        .header-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            min-height: 76px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-left {
            margin-right: auto;
        }
        .nav-right {
            margin-left: auto;
        }
        .nav-item {
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }
        .nav-item:hover {
            background: #eef3fb;
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(30, 111, 235, .25);
        }
        .logo {
            font-size: 23px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            line-height: 1.2;
        }
        .logo::before {
            content: "";
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: linear-gradient(135deg, var(--primary), #20b2ff);
            box-shadow: 0 2px 8px rgba(30, 111, 235, .3);
        }
        .menu-toggle {
            display: none;
            border: none;
            background: transparent;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 8px 10px;
            border-radius: 10px;
        }
        .menu-toggle:hover {
            background: #eef3fb;
        }

        .security-hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(8, 28, 46, .92), rgba(15, 42, 68, .76)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 880px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border-radius: 30px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, .25);
        }
        .security-hero h1 {
            font-size: clamp(34px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.2;
            margin: 22px 0 20px;
            letter-spacing: .5px;
        }
        .security-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            max-width: 660px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 32px;
        }
        .hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 42px;
            color: rgba(255, 255, 255, .82);
            font-size: 14px;
        }
        .hero-meta i {
            color: var(--accent);
            margin-right: 6px;
        }

        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 14px;
            color: var(--muted);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .sep {
            margin: 0 8px;
            color: #b6c2d0;
        }
        .breadcrumb-bar .current {
            color: var(--primary);
            font-weight: 600;
        }

        .section {
            padding: var(--space) 0;
        }
        .section-head {
            margin-bottom: 48px;
        }
        .section-head.center {
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #eaf2ff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            padding: 5px 14px;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--muted);
            font-size: 16px;
            max-width: 660px;
            margin: 0 auto;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .intro-text .section-tag {
            margin-bottom: 12px;
        }
        .intro-text h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
        }
        .intro-text p {
            color: var(--muted);
            margin-bottom: 16px;
        }
        .check-list {
            margin: 20px 0 30px;
        }
        .check-list li {
            margin-bottom: 12px;
            padding-left: 2px;
            font-weight: 500;
        }
        .check-list i {
            color: var(--primary);
            margin-right: 10px;
        }
        .intro-visual {
            position: relative;
        }
        .intro-img-wrap {
            position: relative;
            border-radius: 24px;
            box-shadow: var(--shadow-lg);
        }
        .intro-img-wrap img {
            width: 100%;
            border-radius: 24px;
            object-fit: cover;
        }
        .img-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(255, 255, 255, .95);
            color: var(--dark);
            border-radius: 16px;
            padding: 12px 18px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: var(--shadow);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .img-badge i {
            color: var(--primary);
        }

        .stats-section {
            background: var(--dark);
            color: #fff;
            padding: 52px 0;
        }
        .stat-card {
            text-align: center;
            padding: 20px 10px;
        }
        .stat-num {
            font-size: 44px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1.1;
        }
        .stat-label {
            color: rgba(255, 255, 255, .75);
            margin-top: 8px;
            font-size: 15px;
        }

        .services-grid {
            margin-top: 10px;
        }
        .service-card {
            background: #fff;
            border-radius: 20px;
            padding: 30px 26px;
            height: 100%;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease, background .3s ease, color .3s ease;
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            background: var(--dark);
            color: #fff;
        }
        .service-card:hover p {
            color: rgba(255, 255, 255, .78);
        }
        .service-card:hover .service-icon {
            background: rgba(255, 255, 255, .16);
            color: #fff;
        }
        .service-card:hover .service-tags span {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .service-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
            transition: background .3s ease, color .3s ease;
        }
        .service-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .service-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
            transition: color .3s ease;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }
        .service-tags span {
            background: #f2f6fb;
            border-radius: 12px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--muted);
            transition: background .3s ease, color .3s ease;
        }

        .news-section {
            background: var(--white);
        }
        .news-card {
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .news-thumb {
            overflow: hidden;
        }
        .news-thumb img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-body {
            padding: 22px;
        }
        .news-tag {
            display: inline-block;
            background: #eaf2ff;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 12px;
            padding: 4px 12px;
            margin-bottom: 12px;
        }
        .news-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-body p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .news-meta {
            color: var(--muted);
            font-size: 13px;
        }
        .news-meta i {
            margin-right: 6px;
            color: var(--primary);
        }

        .process-section {
            background: linear-gradient(180deg, var(--bg), #eef4fb);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        .process-item {
            background: #fff;
            border-radius: 18px;
            padding: 30px 22px;
            border-top: 4px solid var(--primary);
            box-shadow: var(--shadow);
            position: relative;
            transition: transform .3s ease;
        }
        .process-item:hover {
            transform: translateY(-6px);
        }
        .process-item:not(:last-child)::after {
            content: "→";
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 22px;
            color: var(--primary);
            font-weight: 900;
            z-index: 2;
        }
        .process-num {
            font-size: 34px;
            font-weight: 900;
            color: var(--primary);
            opacity: .18;
            line-height: 1;
            margin-bottom: 14px;
        }
        .process-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-item p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-section {
            background: #fff;
        }
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all .3s ease;
        }
        .faq-item.open {
            border-color: rgba(30, 111, 235, .3);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            font-family: var(--font);
        }
        .faq-question i {
            transition: transform .3s ease;
            color: var(--primary);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            padding: 0 24px;
        }
        .faq-answer p {
            padding-bottom: 22px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-top: 12px;
        }

        .cta-section {
            padding-bottom: 80px;
        }
        .cta-card {
            position: relative;
            border-radius: 28px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            text-align: center;
            padding: 80px 30px;
            color: #fff;
        }
        .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8, 28, 46, .92), rgba(30, 111, 235, .55));
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-kicker {
            display: inline-block;
            background: rgba(255, 255, 255, .2);
            border: 1px solid rgba(255, 255, 255, .3);
            border-radius: 30px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 18px;
        }
        .cta-card h2 {
            font-size: clamp(26px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, .9);
            margin-bottom: 28px;
        }
        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .7);
            padding: 48px 0 24px;
        }
        .footer-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo::before {
            content: "";
            width: 26px;
            height: 26px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--primary), #20b2ff);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        @media (max-width: 1024px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-item:not(:last-child)::after {
                display: none;
            }
            .intro-grid {
                gap: 44px;
            }
        }

        @media (max-width: 900px) {
            .menu-toggle {
                display: inline-flex;
            }
            .header-wrap {
                flex-wrap: wrap;
                gap: 0;
            }
            .logo {
                order: 1;
                flex: 1;
                margin: 0;
            }
            .menu-toggle {
                order: 2;
            }
            .nav-left,
            .nav-right {
                order: 3;
                width: 100%;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 12px 0 14px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }
            .nav-left {
                border-bottom: 1px dashed var(--border);
                margin-bottom: 0;
            }
            .nav-right {
                border-top: none;
                margin-top: 0;
            }
            .nav-left .nav-item,
            .nav-right .nav-item {
                text-align: center;
                padding: 10px 12px;
                border-radius: 10px;
                display: block;
            }
            .header-wrap.nav-open .nav-left,
            .header-wrap.nav-open .nav-right {
                display: flex;
            }
        }

        @media (max-width: 768px) {
            .security-hero {
                padding: 80px 0 68px;
            }
            .security-hero h1 {
                font-size: 32px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-meta {
                gap: 12px;
                flex-direction: column;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .section {
                --space: 48px;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 56px 20px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-buttons .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .stat-num {
                font-size: 34px;
            }
            .service-card {
                padding: 22px 18px;
            }
            .news-thumb img {
                height: 170px;
            }
            .footer-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
        }