/* roulang page: index */
:root {
  --primary: #0f2a43;
  --primary-2: #1a3a5c;
  --accent: #f59e0b;
  --accent-2: #fbbf24;
  --accent-soft: #fef3c7;
  --bg: #f4f6fb;
  --bg-soft: #eef2f8;
  --card: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(15, 42, 67, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 42, 67, 0.12);
  --sidebar-w: 260px;
  --section-space: 72px;
  --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

.app { min-height: 100vh; }
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #dbe4f0;
  padding: 28px 22px;
  display: flex; flex-direction: column;
  z-index: 100;
  box-shadow: 2px 0 16px rgba(0,0,0,0.08);
}
.brand { padding: 0 8px; margin-bottom: 44px; }
.brand-link { display: block; color: #fff; font-size: 19px; font-weight: 800; line-height: 1.35; letter-spacing: 0.3px; }
.brand-link:hover { color: var(--accent-2); }
.brand-sub { margin-top: 8px; font-size: 12px; color: #8fa3b8; letter-spacing: 0.5px; }
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 20px; padding: 8px; border-radius: 8px; }
.menu-toggle:hover { background: rgba(255,255,255,0.1); }
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 16px; border-radius: 12px;
  color: #cbd5e1; font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.nav-item i { width: 20px; text-align: center; font-size: 15px; }
.nav-item:hover { background: rgba(255,255,255,0.08); color: #fff; transform: translateX(2px); }
.nav-item.active { background: var(--accent); color: #0f2a43; font-weight: 700; box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
.sidebar-footer { margin-top: auto; padding: 20px 8px 8px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 12px; color: #8fa3b8; line-height: 1.6; }

.main-content { margin-left: var(--sidebar-w); display: flex; flex-direction: column; min-height: 100vh; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.section { padding: var(--section-space) 28px; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent-soft); color: #b45309;
  font-size: 13px; font-weight: 700;
  padding: 6px 14px; border-radius: 20px; letter-spacing: 0.5px;
}
.section-head h2 { font-size: 34px; color: var(--text); margin-top: 14px; line-height: 1.25; font-weight: 800; letter-spacing: -0.4px; }
.section-head p { color: var(--text-weak); margin-top: 12px; font-size: 16px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 12px;
  font-size: 15px; font-weight: 600;
  border: none; cursor: pointer; transition: var(--transition);
}
.btn-primary { background: var(--accent); color: #0f2a43; }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.25); backdrop-filter: blur(4px); }
.btn-outline:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }
.btn-soft { background: var(--bg-soft); color: var(--primary); }
.btn-soft:hover { background: #e2e8f0; transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid rgba(245,158,11,0.4); outline-offset: 2px; }

.hero {
  position: relative;
  min-height: 520px;
  display: flex; align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(15,42,67,0.92) 0%, rgba(26,58,92,0.78) 60%, rgba(15,42,67,0.6) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero-inner { max-width: 680px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.12); color: #fde68a;
  padding: 8px 18px; border-radius: 30px;
  font-size: 13px; font-weight: 600;
  backdrop-filter: blur(4px); margin-bottom: 24px;
}
.hero h1 { font-size: 44px; color: #fff; line-height: 1.15; font-weight: 800; letter-spacing: -0.6px; }
.hero p { margin-top: 18px; font-size: 17px; color: rgba(255,255,255,0.85); line-height: 1.7; max-width: 560px; }
.hero-buttons { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.highlight-card {
  background: var(--card); border-radius: var(--radius);
  padding: 32px 24px; box-shadow: var(--shadow);
  transition: var(--transition);
}
.highlight-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.icon-circle {
  width: 56px; height: 56px; border-radius: 18px;
  background: var(--accent-soft); color: #b45309;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 18px;
}
.highlight-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.highlight-card p { color: var(--text-weak); font-size: 14px; line-height: 1.6; }

.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.split-text h2 { font-size: 32px; font-weight: 800; line-height: 1.3; margin-top: 12px; }
.split-text p { color: var(--text-weak); margin-top: 14px; font-size: 15px; }
.check-list { list-style: none; margin-top: 20px; }
.check-list li { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 15px; color: var(--text); font-weight: 500; }
.check-list i { color: #10b981; font-size: 18px; }
.split-image img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }

.category-card {
  display: flex;
  background: var(--card); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  transition: var(--transition);
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.category-card-img { width: 46%; min-height: 260px; overflow: hidden; }
.category-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.category-card:hover .category-card-img img { transform: scale(1.04); }
.category-card-body { flex: 1; padding: 36px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.category-card-body h3 { font-size: 22px; margin-bottom: 12px; }
.category-card-body p { color: var(--text-weak); font-size: 15px; margin-bottom: 20px; }

.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-item {
  background: var(--card); border-radius: var(--radius);
  padding: 32px 24px; position: relative;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.step-item:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.step-num { font-size: 40px; font-weight: 800; color: var(--accent); opacity: 0.35; line-height: 1; display: block; margin-bottom: 16px; }
.step-item h3 { font-size: 17px; margin-bottom: 10px; }
.step-item p { color: var(--text-weak); font-size: 14px; }

.news-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  display: block; background: var(--card);
  border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  transition: var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.news-card-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.news-cat { background: var(--accent-soft); color: #b45309; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.news-date { color: var(--text-weak); font-size: 13px; }
.news-card h3 { font-size: 18px; line-height: 1.4; margin-bottom: 10px; font-weight: 700; }
.news-card p { color: var(--text-weak); font-size: 14px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--primary); transition: gap .2s; }
.news-card:hover .news-more { gap: 10px; color: var(--accent); }
.empty-tip { text-align: center; padding: 40px; color: var(--text-weak); grid-column: 1 / -1; background: var(--card); border-radius: var(--radius); }

.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); border: 1px solid var(--border); overflow: hidden; }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; background: none; border: none;
  font-size: 16px; font-weight: 600; color: var(--text);
  cursor: pointer; text-align: left; transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question i { transition: transform 0.3s; color: var(--text-weak); }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { color: var(--text-weak); font-size: 15px; line-height: 1.7; }

.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 24px; padding: 56px 48px;
  text-align: center; color: #fff; position: relative; overflow: hidden;
}
.cta-box::after { content:''; position: absolute; right: -80px; top: -80px; width: 240px; height: 240px; background: rgba(245,158,11,0.15); border-radius: 50%; }
.cta-box h2 { font-size: 32px; font-weight: 800; }
.cta-box p { color: rgba(255,255,255,0.8); margin-top: 12px; font-size: 16px; }
.cta-box .btn { margin-top: 28px; }

.site-footer { background: var(--primary); color: #cbd5e1; padding: 50px 28px 30px; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.2fr; gap: 40px; max-width: 1200px; margin: 0 auto; }
.footer-brand h3 { color: #fff; font-size: 20px; }
.footer-brand p { margin-top: 12px; font-size: 14px; line-height: 1.7; }
.footer-links h4, .footer-info h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-links a { display: block; padding: 6px 0; font-size: 14px; color: #cbd5e1; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-2); padding-left: 6px; }
.footer-info p { font-size: 13px; color: #8fa3b8; margin-bottom: 8px; }
.footer-bottom { text-align: center; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.08); margin-top: 40px; max-width: 1200px; margin-left: auto; margin-right: auto; font-size: 13px; color: #8fa3b8; }

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-item { font-size: 14px; padding: 11px 12px; }
  .sidebar { width: 220px; padding: 24px 16px; }
  .main-content { margin-left: 220px; }
  .brand-link { font-size: 16px; }
}
@media (max-width: 768px) {
  .section { padding: 48px 20px; }
  .hero { min-height: 420px; padding: 60px 0; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 15px; }
  .section-head h2 { font-size: 26px; }
  .container { padding: 0 20px; }
  .cta-box { padding: 40px 24px; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .category-card { flex-direction: column; }
  .category-card-img { width: 100%; min-height: 200px; }
  .news-list { grid-template-columns: 1fr; }
  .sidebar {
    width: 100%; height: 64px;
    flex-direction: row; align-items: center; justify-content: space-between;
    padding: 0 20px;
  }
  .brand { margin: 0; flex: 1; }
  .brand-sub { display: none; }
  .sidebar-footer { display: none; }
  .menu-toggle { display: block; }
  .sidebar-nav {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--primary-2);
    padding: 12px 20px; flex-direction: column;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
  }
  .sidebar-nav.open { display: flex; }
  .main-content { margin-left: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 520px) {
  .hero { min-height: 380px; }
  .hero-buttons .btn { width: 100%; }
  .cta-box h2 { font-size: 24px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
}

/* roulang page: category1 */
:root {
      --primary: #0e3a8c;
      --primary-light: #2a5cb8;
      --primary-dark: #092a66;
      --accent: #f0a500;
      --accent-light: #ffc940;
      --bg: #f4f7fc;
      --card-bg: #ffffff;
      --text: #152238;
      --text-muted: #5c6b8a;
      --border: #e2e8f3;
      --radius: 18px;
      --radius-sm: 12px;
      --shadow: 0 12px 36px rgba(14, 58, 140, 0.08);
      --shadow-hover: 0 20px 48px rgba(14, 58, 140, 0.14);
      --transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
      --sidebar-w: 280px;
      --font: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: var(--font);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

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

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

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* ===== Sidebar ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-w);
      height: 100vh;
      background: var(--primary);
      background: linear-gradient(175deg, #0b2f6e 0%, #0e3a8c 55%, #123f9c 100%);
      padding: 32px 20px;
      z-index: 1000;
      overflow-y: auto;
      transition: transform 0.35s ease;
      display: flex;
      flex-direction: column;
      box-shadow: 4px 0 30px rgba(6, 29, 73, 0.25);
    }

    .sidebar-brand {
      margin-bottom: 40px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    }

    .brand-link {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 900;
      color: #ffffff;
      letter-spacing: 0.5px;
      line-height: 1.3;
    }

    .brand-link i {
      font-size: 26px;
      color: var(--accent);
    }

    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 8px;
      flex: 1;
    }

    .nav-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 13px 18px;
      border-radius: 14px;
      color: rgba(255, 255, 255, 0.78);
      font-weight: 500;
      font-size: 15px;
      transition: var(--transition);
      border: 1px solid transparent;
    }

    .nav-item i {
      width: 22px;
      text-align: center;
      font-size: 17px;
    }

    .nav-item:hover {
      background: rgba(255, 255, 255, 0.1);
      color: #ffffff;
      transform: translateX(4px);
    }

    .nav-item.active {
      background: rgba(255, 255, 255, 0.15);
      color: #ffffff;
      border-color: rgba(255, 255, 255, 0.18);
      font-weight: 700;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .sidebar-foot {
      margin-top: auto;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.14);
      color: rgba(255, 255, 255, 0.5);
      font-size: 13px;
      line-height: 1.6;
    }

    .sidebar-foot p {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* ===== Topbar (mobile) ===== */
    .topbar {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: var(--primary);
      background: linear-gradient(135deg, #0b2f6e, #0e3a8c);
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 999;
      box-shadow: 0 4px 18px rgba(6, 29, 73, 0.3);
    }

    .topbar-brand {
      color: #fff;
      font-weight: 900;
      font-size: 17px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

    .hamburger {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      cursor: pointer;
      transition: var(--transition);
      margin-right: auto;
      margin-left: 0;
      margin-right: 14px;
    }

    .hamburger:hover {
      background: rgba(255, 255, 255, 0.22);
    }

    .sidebar-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(9, 26, 61, 0.55);
      z-index: 998;
      backdrop-filter: blur(2px);
      opacity: 0;
      transition: opacity 0.3s;
      pointer-events: none;
    }

    .sidebar-overlay.show {
      opacity: 1;
      pointer-events: auto;
    }

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

    .main-content {
      flex: 1;
      overflow: hidden;
    }

    /* ===== Page Banner ===== */
    .page-banner {
      position: relative;
      padding: 92px 0 78px;
      background: linear-gradient(135deg, rgba(14, 58, 140, 0.92), rgba(9, 42, 102, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      color: #fff;
      overflow: hidden;
    }

    .page-banner::after {
      content: '';
      position: absolute;
      bottom: -80px;
      right: -40px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: rgba(240, 165, 0, 0.18);
      filter: blur(60px);
      pointer-events: none;
    }

    .banner-inner {
      position: relative;
      z-index: 2;
      max-width: 860px;
    }

    .banner-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(240, 165, 0, 0.2);
      border: 1px solid rgba(240, 165, 0, 0.4);
      color: #ffc940;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .banner-tag i {
      font-size: 14px;
    }

    .page-banner h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 16px;
      color: #fff;
    }

    .page-banner h1 span {
      color: var(--accent);
    }

    .page-banner p {
      font-size: 18px;
      color: rgba(255, 255, 255, 0.88);
      max-width: 640px;
      margin-bottom: 28px;
      line-height: 1.7;
    }

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: var(--accent);
      color: #0b2f6e;
      font-weight: 700;
      padding: 14px 30px;
      border-radius: 48px;
      font-size: 16px;
      transition: var(--transition);
      box-shadow: 0 8px 26px rgba(240, 165, 0, 0.35);
      cursor: pointer;
    }

    .btn-primary:hover {
      background: var(--accent-light);
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(240, 165, 0, 0.45);
    }

    .btn-primary:active {
      transform: translateY(1px);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      font-weight: 500;
      padding: 14px 30px;
      border-radius: 48px;
      font-size: 16px;
      transition: var(--transition);
      border: 1px solid rgba(255, 255, 255, 0.35);
      cursor: pointer;
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.2);
      transform: translateY(-2px);
    }

    /* ===== Section ===== */
    .section {
      padding: 84px 0;
    }

    .section-alt {
      background: #ffffff;
    }

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

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

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: rgba(14, 58, 140, 0.08);
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 16px;
      letter-spacing: 0.4px;
    }

    .section-tag i {
      font-size: 14px;
    }

    .section-header h2 {
      font-size: 32px;
      font-weight: 900;
      color: var(--text);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-header h2 em {
      font-style: normal;
      color: var(--primary);
    }

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

    /* ===== Intro Section ===== */
    .intro-section {
      position: relative;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 60px;
      align-items: center;
    }

    .intro-visual {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
    }

    .intro-visual img {
      width: 100%;
      height: 360px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .intro-visual:hover img {
      transform: scale(1.04);
    }

    .intro-visual .img-badge {
      position: absolute;
      bottom: 18px;
      left: 18px;
      background: rgba(14, 58, 140, 0.88);
      backdrop-filter: blur(10px);
      color: #fff;
      padding: 10px 22px;
      border-radius: 40px;
      font-size: 14px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    }

    .intro-copy {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .intro-copy p {
      color: var(--text-muted);
      font-size: 15.5px;
      line-height: 1.8;
    }

    .intro-copy strong {
      color: var(--text);
    }

    .check-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 6px;
    }

    .check-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      color: var(--text);
      font-weight: 500;
      font-size: 15px;
    }

    .check-list li i {
      color: var(--accent);
      font-size: 18px;
      margin-top: 2px;
      flex-shrink: 0;
    }

    /* ===== Guide Cards ===== */
    .guide-cards-section {
      background: linear-gradient(180deg, #f4f7fc, #ffffff);
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .guide-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 28px 24px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

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

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

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

    .card-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      background: rgba(14, 58, 140, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary);
      margin-bottom: 18px;
      transition: var(--transition);
    }

    .guide-card:hover .card-icon {
      background: var(--primary);
      color: #fff;
      transform: rotate(-8deg) scale(1.05);
    }

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

    .guide-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 14px;
    }

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

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

    /* ===== Steps ===== */
    .steps-section {
      background: var(--primary);
      background: linear-gradient(150deg, #0b2f6e, #123f9c);
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .steps-section::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(240, 165, 0, 0.12);
      filter: blur(50px);
    }

    .steps-section .section-header h2 {
      color: #fff;
    }

    .steps-section .section-header p {
      color: rgba(255, 255, 255, 0.7);
    }

    .steps-section .section-tag {
      background: rgba(240, 165, 0, 0.15);
      color: #ffc940;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      position: relative;
      z-index: 2;
    }

    .step-card {
      text-align: center;
      padding: 32px 20px;
      background: rgba(255, 255, 255, 0.07);
      border-radius: var(--radius);
      border: 1px solid rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(8px);
      transition: var(--transition);
    }

    .step-card:hover {
      background: rgba(255, 255, 255, 0.13);
      transform: translateY(-4px);
    }

    .step-num {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--accent);
      color: #0b2f6e;
      font-weight: 900;
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 18px;
      box-shadow: 0 8px 20px rgba(240, 165, 0, 0.35);
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #fff;
    }

    .step-card p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      line-height: 1.7;
    }

    /* ===== Tips / Comparison ===== */
    .tips-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .tip-card {
      display: flex;
      gap: 20px;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

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

    .tip-icon {
      width: 50px;
      height: 50px;
      border-radius: 14px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }

    .tip-icon.green {
      background: rgba(22, 163, 74, 0.1);
      color: #16a34a;
    }

    .tip-icon.blue {
      background: rgba(14, 58, 140, 0.1);
      color: var(--primary);
    }

    .tip-icon.orange {
      background: rgba(240, 165, 0, 0.14);
      color: #d48806;
    }

    .tip-icon.purple {
      background: rgba(124, 58, 237, 0.1);
      color: #7c3aed;
    }

    .tip-content h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text);
    }

    .tip-content p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-section {
      background: #ffffff;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-item:hover {
      border-color: rgba(14, 58, 140, 0.3);
      box-shadow: 0 6px 18px rgba(14, 58, 140, 0.06);
    }

    .faq-q {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      cursor: pointer;
      text-align: left;
      transition: var(--transition);
      background: transparent;
    }

    .faq-q i {
      font-size: 16px;
      color: var(--primary);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      margin-left: 16px;
    }

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

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

    .faq-a p {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* ===== CTA ===== */
    .cta-section {
      position: relative;
      padding: 72px 0;
      background: linear-gradient(135deg, rgba(14, 58, 140, 0.93), rgba(9, 42, 102, 0.9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
      text-align: center;
      color: #fff;
    }

    .cta-inner {
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      font-size: 34px;
      font-weight: 900;
      margin-bottom: 14px;
    }

    .cta-inner h2 span {
      color: var(--accent);
    }

    .cta-inner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.82);
      margin-bottom: 30px;
      line-height: 1.7;
    }

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

    /* ===== Footer ===== */
    .site-footer {
      background: #091d3f;
      color: rgba(255, 255, 255, 0.65);
      padding: 56px 0 40px;
    }

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

    .footer-brand h3 {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-brand h3 i {
      color: var(--accent);
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.75;
      max-width: 360px;
    }

    .footer-links h4,
    .footer-info h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      padding-bottom: 10px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    }

    .footer-links {
      display: flex;
      flex-direction: column;
    }

    .footer-links a {
      color: rgba(255, 255, 255, 0.65);
      font-size: 14px;
      padding: 5px 0;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--accent);
      padding-left: 6px;
    }

    .footer-info p {
      font-size: 14px;
      line-height: 1.8;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }

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

      .intro-grid {
        gap: 40px;
      }

      .page-banner h1 {
        font-size: 36px;
      }
    }

    @media (max-width: 992px) {
      :root {
        --sidebar-w: 280px;
      }

      .sidebar {
        transform: translateX(-100%);
        transition: transform 0.35s ease;
      }

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

      .sidebar-overlay {
        display: block;
      }

      .topbar {
        display: flex;
      }

      .main-wrap {
        margin-left: 0;
        padding-top: 64px;
      }

      .page-banner {
        padding: 70px 0 60px;
      }

      .container {
        padding: 0 24px;
      }
    }

    @media (max-width: 768px) {
      .section {
        padding: 60px 0;
      }

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

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

      .page-banner p {
        font-size: 16px;
      }

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

      .intro-visual img {
        height: 240px;
      }

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

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

      .btn-primary,
      .btn-ghost {
        width: 100%;
        justify-content: center;
        padding: 14px 20px;
      }

      .banner-actions,
      .cta-actions {
        flex-direction: column;
      }
    }

    @media (max-width: 520px) {
      .cards-grid {
        grid-template-columns: 1fr;
      }

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

      .container {
        padding: 0 18px;
      }

      .page-banner {
        padding: 54px 0 48px;
      }

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

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

      .topbar-brand span {
        font-size: 15px;
      }
    }

    /* Focus accessibility */
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid rgba(240, 165, 0, 0.6);
      outline-offset: 2px;
      border-radius: 8px;
    }

/* roulang page: article */
:root {
            --primary: #0d9488;
            --primary-dark: #0f766e;
            --primary-light: #ccfbf1;
            --accent: #f59e0b;
            --bg-body: #f0fdfa;
            --bg-card: #ffffff;
            --bg-deep: #0f172a;
            --bg-sidebar-top: #0f172a;
            --bg-sidebar-bottom: #134e4a;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --text-invert: #ffffff;
            --border: #e2e8f0;
            --border-soft: #eef2f7;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 50px rgba(13, 60, 58, 0.1);
            --shadow-primary: 0 8px 20px rgba(13, 148, 136, 0.25);
            --transition: 0.25s ease;
            --sidebar-w: 264px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

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

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

        .container-narrow {
            max-width: 920px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .sidebar {
            width: var(--sidebar-w);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: linear-gradient(180deg, var(--bg-sidebar-top) 0%, var(--bg-sidebar-bottom) 100%);
            color: var(--text-invert);
            display: flex;
            flex-direction: column;
            padding: 28px 18px 22px;
            z-index: 1200;
            overflow-y: auto;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 10px;
            border-radius: var(--radius-md);
            transition: background var(--transition);
        }

        .brand:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .brand-badge {
            width: 46px;
            height: 46px;
            flex-shrink: 0;
            border-radius: 14px;
            background: linear-gradient(135deg, #14b8a6, #0ea5e9);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #fff;
            box-shadow: 0 6px 16px rgba(20, 184, 166, 0.35);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.35;
            min-width: 0;
        }

        .brand-text strong {
            color: #fff;
            font-size: 16px;
            letter-spacing: 0.3px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .brand-text small {
            color: rgba(255, 255, 255, 0.55);
            font-size: 12px;
            letter-spacing: 0.4px;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-top: 40px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
            border: 1px solid transparent;
        }

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

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

        .nav-item.active {
            background: rgba(20, 184, 166, 0.2);
            border-color: rgba(20, 184, 166, 0.3);
            color: #5eead4;
            box-shadow: 0 4px 14px rgba(20, 184, 166, 0.12);
        }

        .sidebar-note {
            margin-top: auto;
            padding: 18px 16px;
            background: rgba(255, 255, 255, 0.07);
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-note p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 13px;
            line-height: 1.8;
            margin: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-note i {
            color: #5eead4;
            font-size: 14px;
            width: 16px;
            text-align: center;
        }

        .main-wrap {
            flex: 1;
            margin-left: var(--sidebar-w);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
        }

        .mobile-header {
            position: sticky;
            top: 0;
            z-index: 1100;
            background: rgba(15, 23, 42, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            display: none;
            align-items: center;
            justify-content: space-between;
            padding: 10px 14px;
            color: #fff;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.2);
        }

        .menu-toggle {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: #fff;
            font-size: 19px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

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

        .menu-toggle:focus-visible {
            outline: 2px solid #5eead4;
            outline-offset: 2px;
        }

        .mobile-brand {
            color: #fff;
            text-decoration: none;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .mobile-guide {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: #5eead4;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            transition: background var(--transition);
        }

        .mobile-guide:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #99f6e4;
        }

        .sidebar-backdrop {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.55);
            z-index: 1150;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }

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

        .page-banner {
            position: relative;
            min-height: 250px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(13, 48, 55, 0.95) 0%, rgba(15, 118, 110, 0.82) 55%, rgba(20, 184, 166, 0.58) 100%);
        }

        .banner-inner {
            position: relative;
            z-index: 1;
            width: 100%;
            padding: 48px 24px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            margin-bottom: 12px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb .sep {
            opacity: 0.55;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .banner-title {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-top: 4px;
        }

        .banner-sub {
            color: rgba(255, 255, 255, 0.88);
            margin-top: 8px;
            font-size: 15px;
            max-width: 560px;
        }

        .article-section {
            padding: 0 0 56px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: 22px;
            box-shadow: var(--shadow-lg);
            padding: 44px 52px;
            max-width: 920px;
            margin: -60px auto 0;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.6);
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .article-category i {
            font-size: 12px;
        }

        .article-title {
            font-size: 30px;
            line-height: 1.4;
            color: #0f172a;
            font-weight: 700;
            margin-bottom: 16px;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            color: var(--text-muted);
            font-size: 14px;
            padding-bottom: 22px;
            border-bottom: 1px solid var(--border-soft);
            margin-bottom: 28px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 13px;
        }

        .article-hero {
            width: 100%;
            border-radius: 14px;
            margin-bottom: 32px;
            object-fit: cover;
            aspect-ratio: 16 / 8;
            box-shadow: var(--shadow-sm);
        }

        .article-content {
            font-size: 16.5px;
            line-height: 1.9;
            color: #2d3a4e;
        }

        .article-content p {
            margin: 0 0 1.35em;
        }

        .article-content h2 {
            font-size: 24px;
            line-height: 1.4;
            margin: 2em 0 0.85em;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            color: #0f172a;
        }

        .article-content h3 {
            font-size: 20px;
            line-height: 1.45;
            margin: 1.6em 0 0.7em;
            color: #0f172a;
        }

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 1.2em 0;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.35em;
            padding-left: 1.4em;
        }

        .article-content li {
            margin-bottom: 0.5em;
        }

        .article-content blockquote {
            margin: 1.6em 0;
            padding: 16px 20px;
            background: #f0fdfa;
            border-left: 4px solid var(--primary);
            border-radius: 0 12px 12px 0;
            color: #334155;
            font-style: normal;
        }

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

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

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.4em 0;
            border-radius: 10px;
            overflow: hidden;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
        }

        .article-content table th {
            background: #f8fafc;
            font-weight: 600;
            color: #0f172a;
        }

        .article-footer {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-soft);
        }

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

        .tag {
            display: inline-block;
            background: #f1f5f9;
            color: #475569;
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 999px;
            transition: all var(--transition);
        }

        .tag:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

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

        .btn-back:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .not-found-card {
            background: var(--bg-card);
            border-radius: 22px;
            box-shadow: var(--shadow-lg);
            max-width: 720px;
            margin: -60px auto 0;
            padding: 64px 40px;
            text-align: center;
            position: relative;
        }

        .not-found-icon {
            width: 86px;
            height: 86px;
            margin: 0 auto 22px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 34px;
            color: var(--primary);
        }

        .not-found-card h2 {
            font-size: 28px;
            margin-bottom: 10px;
            color: #0f172a;
        }

        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 26px;
            font-size: 15px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 26px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            text-decoration: none;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

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

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .quick-info {
            padding: 56px 0 64px;
            background: linear-gradient(180deg, #f0fdfa 0%, #f8fafc 100%);
        }

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

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: #0f172a;
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .section-sub {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }

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

        .info-card {
            background: #fff;
            border-radius: 18px;
            padding: 32px 28px;
            box-shadow: 0 6px 20px rgba(15, 23, 42, 0.05);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-soft);
            position: relative;
            overflow: hidden;
        }

        .info-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .info-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 16px 36px rgba(15, 23, 42, 0.1);
        }

        .info-card:hover::after {
            opacity: 1;
        }

        .info-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 21px;
            margin-bottom: 18px;
        }

        .info-card:nth-child(1) .info-icon {
            background: #e0f2fe;
            color: #0284c7;
        }

        .info-card:nth-child(2) .info-icon {
            background: #dcfce7;
            color: #16a34a;
        }

        .info-card:nth-child(3) .info-icon {
            background: #fef3c7;
            color: #d97706;
        }

        .info-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #0f172a;
        }

        .info-text {
            font-size: 14.5px;
            line-height: 1.75;
            color: var(--text-muted);
        }

        .faq-section {
            padding: 60px 0;
            background: #fff;
        }

        .faq-panel {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #f8fafc;
            border-radius: 14px;
            border: 1px solid var(--border-soft);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(13, 148, 136, 0.3);
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.06);
        }

        .faq-item summary {
            cursor: pointer;
            padding: 18px 22px;
            font-weight: 600;
            color: #0f172a;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            list-style: none;
            font-size: 16px;
            line-height: 1.5;
            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: 14px;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform var(--transition);
        }

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

        .faq-item .faq-answer {
            padding: 0 22px 18px;
            color: #475569;
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            margin-top: 0;
            padding-top: 14px;
        }

        .cta-section {
            padding: 60px 0 72px;
            background: var(--bg-body);
        }

        .cta-panel {
            background: linear-gradient(120deg, #0f766e, #0d9488 55%, #14b8a6);
            border-radius: 24px;
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(13, 148, 136, 0.22);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            width: 220px;
            height: 220px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            top: -80px;
            right: -40px;
        }

        .cta-panel::after {
            content: '';
            position: absolute;
            width: 140px;
            height: 140px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            bottom: -40px;
            left: 30px;
        }

        .cta-title {
            font-size: 26px;
            font-weight: 700;
            position: relative;
            z-index: 1;
            line-height: 1.4;
        }

        .cta-text {
            color: rgba(255, 255, 255, 0.9);
            margin-top: 10px;
            position: relative;
            z-index: 1;
            font-size: 15px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            margin-top: 26px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .btn-white {
            background: #fff;
            color: var(--primary-dark);
            padding: 12px 26px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
            color: var(--primary-dark);
        }

        .btn-ghost {
            border: 1px solid rgba(255, 255, 255, 0.65);
            color: #fff;
            padding: 11px 22px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .btn-white:focus-visible,
        .btn-ghost:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 40px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .footer-links h4,
        .footer-info h4 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 14px;
            padding: 6px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: #5eead4;
            padding-left: 4px;
        }

        .footer-info p {
            font-size: 14px;
            margin: 6px 0;
            color: rgba(255, 255, 255, 0.6);
        }

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

            .article-card {
                padding: 36px 30px;
            }

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

        @media (max-width: 900px) {
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                box-shadow: none;
            }

            .sidebar.open {
                transform: translateX(0);
                box-shadow: 0 0 40px rgba(0, 0, 0, 0.3);
            }

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

            .mobile-header {
                display: flex;
            }

            .page-banner {
                min-height: 200px;
            }

            .banner-title {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .container-narrow {
                padding: 0 16px;
            }

            .article-card {
                padding: 28px 20px;
                margin-top: -44px;
                border-radius: 18px;
            }

            .article-title {
                font-size: 24px;
            }

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

            .article-content {
                font-size: 15.5px;
            }

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

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

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

            .section-title {
                font-size: 23px;
            }

            .cta-panel {
                padding: 40px 24px;
                border-radius: 18px;
            }

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

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .cta-buttons .btn-white,
            .cta-buttons .btn-ghost {
                width: 100%;
                justify-content: center;
            }

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

            .not-found-card {
                padding: 48px 24px;
                margin-top: -44px;
                border-radius: 18px;
            }

            .not-found-card h2 {
                font-size: 24px;
            }

            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }

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

        @media (max-width: 520px) {
            .banner-title {
                font-size: 22px;
            }

            .banner-sub {
                font-size: 14px;
            }

            .article-card {
                padding: 22px 16px;
            }

            .article-title {
                font-size: 21px;
            }

            .article-meta {
                flex-direction: column;
                gap: 6px;
            }

            .article-hero {
                aspect-ratio: 16 / 10;
                border-radius: 10px;
            }

            .info-card {
                padding: 24px 20px;
            }

            .faq-item summary {
                font-size: 15px;
                padding: 16px 16px;
            }

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

            .cta-panel {
                padding: 34px 18px;
            }

            .cta-title {
                font-size: 20px;
            }

            .mobile-brand {
                font-size: 15px;
            }
        }