/* roulang page: index */
:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-deep: #1e1b4b;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fffbeb;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --dark: #0f172a;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --space-section: 80px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.grid-container { max-width: 1280px; }
.section-pad { padding: var(--space-section) 0; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.25rem); font-weight: 800; color: var(--dark); text-align: center; margin-bottom: 8px; letter-spacing: -0.02em; }
.section-sub { font-size: 1rem; color: var(--muted); text-align: center; max-width: 640px; margin: 0 auto 48px; line-height: 1.7; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226,232,240,0.7);
  box-shadow: 0 2px 20px rgba(15,23,42,0.04);
}
.main-nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; padding: 0 28px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.18rem; font-weight: 800; color: var(--dark); white-space: nowrap;
  letter-spacing: -0.01em;
}
.brand i {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #818cf8);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1rem; box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}
.nav-links { display: flex; align-items: center; gap: 4px; margin: 0; }
.nav-links > li > a {
  display: inline-block; padding: 10px 18px; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 500; color: var(--text);
  transition: all .25s ease; position: relative;
}
.nav-links > li > a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links > li.active > a {
  color: var(--primary); font-weight: 600; background: var(--primary-light);
}
.nav-links > li.active > a::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 3px; border-radius: 4px; background: var(--primary);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.search-box {
  display: flex; align-items: center; background: var(--bg);
  border: 1px solid var(--border); border-radius: 24px; padding: 0 16px;
  height: 40px; transition: border-color .25s, box-shadow .25s;
}
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.12); }
.search-box input { border: none; outline: none; background: transparent; width: 120px; font-size: 0.9rem; color: var(--text); }
.search-box input::placeholder { color: #94a3b8; }
.search-box button { border: none; background: transparent; color: var(--muted); font-size: 0.9rem; padding: 0 0 0 8px; cursor: pointer; transition: color .2s; }
.search-box button:hover { color: var(--primary); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: 24px; font-size: 0.9rem; font-weight: 600;
  border: none; cursor: pointer; transition: all .3s ease; white-space: nowrap;
}
.btn i { font-size: 0.85rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary), #6366f1); color: #fff; box-shadow: 0 4px 14px rgba(79,70,229,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(79,70,229,0.4); color: #fff; }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-lg { padding: 14px 36px; font-size: 1rem; border-radius: 28px; }
.btn-light { background: #fff; color: var(--primary-dark); box-shadow: 0 6px 20px rgba(0,0,0,0.18); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.22); color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.3rem; color: var(--dark); width: 40px; height: 40px; border-radius: 10px; cursor: pointer; }
.nav-toggle:hover { background: var(--bg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(30,27,75,0.94) 0%, rgba(55,48,163,0.88) 55%, rgba(79,70,229,0.82) 100%),
              url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #fff; padding: 110px 0 130px; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -120px; right: -80px; width: 420px; height: 420px;
  border-radius: 50%; background: rgba(255,255,255,0.06); filter: blur(20px);
}
.hero::after {
  content: ''; position: absolute; bottom: -160px; left: -100px; width: 360px; height: 360px;
  border-radius: 50%; background: rgba(245,158,11,0.1); filter: blur(40px);
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 860px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 30px; border: 1px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.12); backdrop-filter: blur(8px);
  font-size: 0.85rem; font-weight: 500; margin-bottom: 28px;
}
.hero-badge i { color: #fbbf24; }
.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem); font-weight: 900; line-height: 1.15;
  letter-spacing: -0.03em; margin-bottom: 20px;
}
.hero h1 span { background: linear-gradient(135deg, #fbbf24, #f59e0b); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: clamp(1rem, 1.6vw, 1.2rem); line-height: 1.8; color: rgba(255,255,255,0.85); max-width: 680px; margin: 0 auto 38px; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 30px; margin-top: 48px; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; font-size: 0.9rem; color: rgba(255,255,255,0.8); }
.hero-meta i { color: #fbbf24; }

/* ===== Stats Strip ===== */
.stats-strip { margin-top: -60px; position: relative; z-index: 5; }
.stats-card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 30px 20px; text-align: center; margin-bottom: 0;
}
.stats-card .num { font-size: 2.1rem; font-weight: 900; color: var(--primary); line-height: 1.2; }
.stats-card .label { font-size: 0.9rem; color: var(--muted); margin-top: 6px; }

/* ===== Features ===== */
.features-section .feature-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 28px; height: 100%; transition: all .3s ease; position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--primary), #818cf8); opacity: 0; transition: opacity .3s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 60px; height: 60px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.feature-icon.indigo { background: var(--primary-light); color: var(--primary); }
.feature-icon.amber { background: var(--accent-light); color: var(--accent-dark); }
.feature-icon.emerald { background: #ecfdf5; color: #059669; }
.feature-icon.rose { background: #fff1f2; color: #e11d48; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.feature-card p { font-size: 0.92rem; color: var(--muted); line-height: 1.7; }

/* ===== Categories ===== */
.categories-section { background: var(--surface); }
.cat-card {
  display: block; background: var(--bg); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: all .35s ease; height: 100%;
}
.cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cat-cover { position: relative; height: 200px; overflow: hidden; }
.cat-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.cat-card:hover .cat-cover img { transform: scale(1.06); }
.cat-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(15,23,42,0.45)); }
.cat-tag {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  padding: 6px 14px; border-radius: 20px; background: rgba(255,255,255,0.9);
  color: var(--primary); font-size: 0.78rem; font-weight: 700;
}
.cat-body { padding: 26px 24px 24px; }
.cat-body h3 { font-size: 1.2rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.cat-body p { font-size: 0.9rem; color: var(--muted); line-height: 1.6; margin-bottom: 16px; }
.cat-link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.88rem; font-weight: 600; color: var(--primary); }
.cat-link i { transition: transform .25s; }
.cat-card:hover .cat-link i { transform: translateX(4px); }

/* ===== Latest Posts ===== */
.posts-section { background: #f8fafc; }
.post-card {
  background: var(--surface); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s ease; height: 100%;
  display: flex; flex-direction: column;
}
.post-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); border-color: transparent; }
.post-cover { height: 180px; overflow: hidden; position: relative; }
.post-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.post-card:hover .post-cover img { transform: scale(1.05); }
.post-cover .badge {
  position: absolute; top: 12px; left: 12px;
  background: rgba(255,255,255,0.92); color: var(--primary);
  padding: 4px 12px; border-radius: 16px; font-size: 0.75rem; font-weight: 700;
}
.post-body { padding: 20px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.post-body h3 { font-size: 1.02rem; font-weight: 700; line-height: 1.45; margin-bottom: 8px; }
.post-body h3 a { color: var(--dark); }
.post-body h3 a:hover { color: var(--primary); }
.post-body p { font-size: 0.88rem; color: var(--muted); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.post-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: #94a3b8; margin-top: auto; }
.post-meta i { margin-right: 4px; }
.empty-state { text-align: center; padding: 60px 20px; background: var(--surface); border-radius: var(--radius); border: 1px dashed var(--border); color: var(--muted); font-size: 1rem; }

/* ===== Steps ===== */
.steps-section { background: var(--surface); }
.step-item { text-align: center; padding: 30px 20px; position: relative; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--primary), #818cf8);
  box-shadow: 0 6px 18px rgba(79,70,229,0.35);
  position: relative; z-index: 2;
}
.step-item:not(:last-child)::after {
  content: ''; position: absolute; top: 56px; left: calc(50% + 46px); right: calc(-50% + 46px);
  height: 2px; background: var(--border); z-index: 1;
}
.step-item h3 { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.step-item p { font-size: 0.88rem; color: var(--muted); line-height: 1.6; max-width: 240px; margin: 0 auto; }

/* ===== Hot Section ===== */
.hot-section { background: linear-gradient(180deg, var(--bg) 0%, #eef2ff 100%); }
.hot-card { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); padding: 30px 32px; }
.hot-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.hot-card h3 i { color: var(--accent); }
.hot-list li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); transition: background .2s; }
.hot-list li:last-child { border-bottom: none; }
.hot-list li:hover { background: var(--bg); padding-left: 10px; border-radius: var(--radius-sm); }
.hot-num { font-size: 1.1rem; font-weight: 800; color: var(--border); min-width: 32px; }
.hot-list li:first-child .hot-num { color: var(--accent); }
.hot-list li:nth-child(2) .hot-num { color: #94a3b8; }
.hot-list li:nth-child(3) .hot-num { color: #d97706; }
.hot-list a { flex: 1; font-size: 0.93rem; font-weight: 500; color: var(--text); }
.hot-list a:hover { color: var(--primary); }
.hot-view { font-size: 0.78rem; color: #94a3b8; white-space: nowrap; }
.hot-side-card {
  background: linear-gradient(135deg, var(--primary-deep), var(--primary)); color: #fff;
  border-radius: var(--radius); padding: 40px 36px; height: 100%;
  display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden;
}
.hot-side-card::after { content: ''; position: absolute; bottom: -40px; right: -40px; width: 180px; height: 180px; border-radius: 50%; background: rgba(255,255,255,0.08); }
.hot-side-card h3 { font-size: 1.5rem; font-weight: 800; line-height: 1.4; margin-bottom: 12px; }
.hot-side-card p { font-size: 0.92rem; color: rgba(255,255,255,0.8); line-height: 1.7; margin-bottom: 24px; }
.hot-side-card .btn { align-self: flex-start; }

/* ===== FAQ ===== */
.faq-section { background: var(--surface); }
.faq-wrap { max-width: 820px; margin: 0 auto; }
.accordion { background: transparent; }
.accordion-item { border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 16px; background: var(--bg); overflow: hidden; }
.accordion-title { padding: 20px 26px !important; font-size: 1rem !important; font-weight: 600 !important; background: transparent !important; border: none !important; position: relative; color: var(--dark) !important; }
.accordion-title:hover { color: var(--primary) !important; }
.accordion-title::before { color: var(--primary) !important; }
.accordion-content { padding: 0 26px 22px !important; background: transparent !important; color: var(--muted) !important; font-size: 0.92rem; line-height: 1.8; }

/* ===== CTA ===== */
.cta-section {
  position: relative; background: linear-gradient(135deg, #1e1b4b, #3730a3), url('/assets/images/backpic/back-2.png') center/cover;
  color: #fff; padding: 90px 0; text-align: center; overflow: hidden;
}
.cta-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(30,27,75,0.55); }
.cta-content { position: relative; z-index: 2; max-width: 680px; margin: 0 auto; }
.cta-content h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; margin-bottom: 16px; letter-spacing: -0.02em; }
.cta-content p { font-size: 1.05rem; color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: 34px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 64px 0 0; }
.footer-brand { font-size: 1.25rem; font-weight: 800; color: #fff; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.footer-brand i { width: 38px; height: 38px; border-radius: 10px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1rem; }
.footer-desc { font-size: 0.88rem; line-height: 1.7; max-width: 340px; margin-bottom: 24px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { font-size: 0.88rem; color: rgba(255,255,255,0.6); transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 48px; padding: 22px 0; text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.45); }

/* ===== Focus Accessibility ===== */
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(79,70,229,0.4); outline-offset: 2px; border-radius: 6px; }

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
  .search-box { display: none; }
  :root { --space-section: 60px; }
  .step-item:not(:last-child)::after { display: none; }
}
@media screen and (max-width: 768px) {
  .main-nav { height: 64px; padding: 0 16px; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0; background: var(--surface);
    flex-direction: column; align-items: stretch; padding: 12px 16px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    display: none; z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 12px 14px; border-radius: var(--radius-sm); }
  .nav-links li.active a::after { display: none; }
  .nav-actions { gap: 8px; }
  .nav-actions .btn { padding: 8px 16px; font-size: 0.85rem; }
  .nav-actions .btn-outline { display: none; }
  .hero { padding: 80px 0 100px; }
  .stats-strip { margin-top: -40px; }
  .hero-actions .btn { padding: 12px 28px; }
  .hot-card { margin-bottom: 24px; }
}
@media screen and (max-width: 520px) {
  :root { --space-section: 48px; }
  .hero-desc { font-size: 0.95rem; }
  .hero-meta { gap: 8px 16px; }
  .post-cover { height: 160px; }
  .btn-lg { padding: 12px 28px; }
}

/* roulang page: category1 */
:root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --primary-light: #eff6ff;
      --accent: #7c3aed;
      --accent-light: #f5f3ff;
      --bg: #f8fafc;
      --surface: #ffffff;
      --text: #0f172a;
      --text-light: #64748b;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-sm: 10px;
      --radius-lg: 24px;
      --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.10);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul,
    ol {
      list-style: none;
    }

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

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

    .section {
      padding: 90px 0;
    }

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

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 100px;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 12px;
      letter-spacing: -0.02em;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: 100px;
      font-weight: 600;
      font-size: 15px;
      line-height: 1.2;
      border: 2px solid transparent;
      transition: var(--transition);
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 16px rgba(37, 99, 235, 0.28);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(37, 99, 235, 0.36);
    }

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

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .btn-light {
      background: rgba(255, 255, 255, 0.95);
      color: var(--primary-dark);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
    }

    .btn-light:hover {
      background: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    }

    .btn-outline-light {
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(255, 255, 255, 0.5);
      color: #fff;
      backdrop-filter: blur(4px);
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.16);
      border-color: #fff;
    }

    .btn-lg {
      padding: 15px 34px;
      font-size: 16px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 4px 12px;
      border-radius: 100px;
      font-size: 12px;
      font-weight: 600;
      line-height: 1.5;
    }

    .badge-primary {
      background: var(--primary-light);
      color: var(--primary);
    }

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

    .badge-success {
      background: #dcfce7;
      color: #16a34a;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: saturate(180%) blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.7);
      box-shadow: 0 2px 20px rgba(15, 23, 42, 0.04);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 26px;
      height: 72px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text);
      white-space: nowrap;
      letter-spacing: -0.02em;
    }

    .brand i {
      color: var(--primary);
      font-size: 22px;
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      border-radius: 12px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 0 0 auto;
      margin: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 16px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-light);
      border-radius: 100px;
      transition: var(--transition);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    .nav-links li.active a {
      color: var(--primary);
      background: var(--primary-light);
      font-weight: 600;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
    }

    .search-box {
      position: relative;
      display: flex;
      align-items: center;
    }

    .search-box input {
      width: 180px;
      height: 40px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 100px;
      padding: 0 16px 0 40px;
      font-size: 14px;
      color: var(--text);
      transition: var(--transition);
    }

    .search-box input:focus {
      width: 230px;
      border-color: var(--primary);
      background: #fff;
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    }

    .search-box button {
      position: absolute;
      left: 4px;
      width: 32px;
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-light);
      font-size: 14px;
      cursor: pointer;
      border-radius: 50%;
      transition: var(--transition);
    }

    .search-box button:hover {
      color: var(--primary);
    }

    .nav-actions .btn {
      padding: 9px 20px;
      font-size: 14px;
    }

    .nav-actions .btn i {
      font-size: 14px;
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 12px;
      font-size: 18px;
      color: var(--text);
      cursor: pointer;
    }

    .page-hero {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 64, 175, 0.85) 60%, rgba(124, 58, 237, 0.7) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      padding: 88px 0 76px;
      color: #fff;
    }

    .page-hero .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.8);
      margin-bottom: 24px;
    }

    .page-hero .breadcrumb a {
      color: rgba(255, 255, 255, 0.8);
    }

    .page-hero .breadcrumb a:hover {
      color: #fff;
    }

    .page-hero .breadcrumb i {
      font-size: 11px;
      opacity: 0.7;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.14);
      backdrop-filter: blur(6px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 6px 18px;
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 16px;
      letter-spacing: -0.03em;
    }

    .hero-subtitle {
      font-size: 18px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.85);
      max-width: 480px;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 42px;
    }

    .hero-stats {
      display: flex;
      gap: 44px;
      flex-wrap: wrap;
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.18);
    }

    .stat-item {
      text-align: left;
    }

    .stat-num {
      font-size: 30px;
      font-weight: 800;
      line-height: 1.2;
    }

    .stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.75);
      margin-top: 4px;
    }

    .steps-section {
      padding: 90px 0 80px;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      margin-top: 40px;
    }

    .step-card {
      position: relative;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 34px 26px 30px;
      transition: var(--transition);
      overflow: hidden;
    }

    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .step-number {
      position: absolute;
      top: 16px;
      right: 20px;
      font-size: 52px;
      font-weight: 800;
      color: rgba(37, 99, 235, 0.08);
      line-height: 1;
      z-index: 0;
    }

    .step-icon {
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 16px;
      font-size: 24px;
      margin-bottom: 20px;
      transition: var(--transition);
      position: relative;
      z-index: 1;
    }

    .step-card:nth-child(2) .step-icon {
      background: var(--accent-light);
      color: var(--accent);
    }

    .step-card:nth-child(3) .step-icon {
      background: #dcfce7;
      color: #16a34a;
    }

    .step-card:nth-child(4) .step-icon {
      background: #fef3c7;
      color: #d97706;
    }

    .step-card:hover .step-icon {
      transform: scale(1.08);
    }

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

    .step-desc {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.65;
    }

    .step-line {
      position: absolute;
      top: 50%;
      right: -30px;
      width: 28px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), transparent);
      z-index: 2;
    }

    .feature-section {
      background: var(--surface);
      padding: 90px 0;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

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

    .feature-card {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 34px 30px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.04), transparent);
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow);
      border-color: rgba(37, 99, 235, 0.25);
    }

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

    .feature-icon {
      width: 58px;
      height: 58px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      font-size: 24px;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }

    .feature-card:nth-child(1) .feature-icon {
      background: var(--primary-light);
      color: var(--primary);
    }

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

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

    .feature-card:nth-child(4) .feature-icon {
      background: #fef3c7;
      color: #d97706;
    }

    .feature-card:nth-child(5) .feature-icon {
      background: #fee2e2;
      color: #dc2626;
    }

    .feature-card:nth-child(6) .feature-icon {
      background: #e0f2fe;
      color: #0284c7;
    }

    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      position: relative;
      z-index: 1;
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.65;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }

    .feature-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      position: relative;
      z-index: 1;
    }

    .feature-link i {
      font-size: 12px;
      transition: transform 0.3s ease;
    }

    .feature-link:hover i {
      transform: translateX(4px);
    }

    .content-section {
      padding: 90px 0;
    }

    .content-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-bottom: 40px;
    }

    .content-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .content-cover {
      position: relative;
      height: 200px;
      overflow: hidden;
    }

    .content-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .content-card:hover .content-cover img {
      transform: scale(1.05);
    }

    .content-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
    }

    .content-body {
      padding: 24px 24px 26px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .content-title {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--text);
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .content-card:hover .content-title {
      color: var(--primary);
    }

    .content-excerpt {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.65;
      margin-bottom: 18px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .content-meta {
      margin-top: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-light);
    }

    .content-meta i {
      font-size: 13px;
      margin-right: 4px;
    }

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

    .read-more i {
      transition: transform 0.3s ease;
    }

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

    .faq-section {
      background: var(--surface);
      padding: 90px 0;
      border-top: 1px solid var(--border);
    }

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

    .faq-item {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.open {
      box-shadow: var(--shadow);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 22px 26px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      cursor: pointer;
      text-align: left;
      background: transparent;
      transition: var(--transition);
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-question i {
      font-size: 14px;
      color: var(--text-light);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      margin-left: 16px;
    }

    .faq-item.open .faq-question i {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      padding: 0 26px;
      overflow: hidden;
      font-size: 15px;
      color: var(--text-light);
      line-height: 1.7;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }

    .faq-item.open .faq-answer {
      max-height: 500px;
      padding: 0 26px 24px;
    }

    .cta-section {
      padding: 90px 0;
    }

    .cta-inner {
      background: linear-gradient(135deg, rgba(30, 64, 175, 0.95) 0%, rgba(124, 58, 237, 0.88) 100%), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
      border-radius: var(--radius-lg);
      padding: 80px 60px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .cta-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      padding: 6px 18px;
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .cta-title {
      font-size: 38px;
      font-weight: 800;
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .cta-desc {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.85);
      max-width: 480px;
      margin: 0 auto 34px;
      line-height: 1.7;
    }

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

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px;
      font-size: 14px;
    }

    .site-footer .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #f1f5f9;
      margin-bottom: 16px;
    }

    .site-footer .footer-brand i {
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
      border-radius: 12px;
      font-size: 18px;
    }

    .footer-desc {
      color: #94a3b8;
      line-height: 1.7;
      margin-bottom: 0;
      max-width: 300px;
    }

    .footer-col {
      margin-bottom: 24px;
    }

    .footer-col h4 {
      color: #f1f5f9;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 12px;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

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

    .footer-col ul li a {
      color: #94a3b8;
      transition: var(--transition);
    }

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

    .footer-col ul li i {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      margin-top: 40px;
      text-align: center;
      color: #64748b;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .main-nav {
        gap: 18px;
      }

      .search-box {
        display: none;
      }

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

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

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

    @media (max-width: 768px) {
      .section {
        padding: 64px 0;
      }

      .section-title {
        font-size: 28px;
      }

      .page-hero {
        padding: 64px 0 56px;
      }

      .hero-title {
        font-size: 32px;
      }

      .hero-subtitle {
        font-size: 16px;
      }

      .main-nav {
        height: 66px;
        flex-wrap: nowrap;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 66px;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        align-items: stretch;
        padding: 12px 20px 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
        gap: 4px;
      }

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

      .nav-links li a {
        padding: 12px 16px;
        font-size: 16px;
      }

      .nav-links li.active a {
        margin-left: 0;
      }

      .nav-actions {
        margin-left: auto;
      }

      .nav-actions .btn-outline {
        display: none;
      }

      .nav-actions .btn-primary {
        padding: 9px 16px;
        font-size: 13px;
      }

      .nav-toggle {
        display: flex;
      }

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

      .step-line {
        display: none;
      }

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

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

      .cta-inner {
        padding: 56px 32px;
        border-radius: var(--radius);
      }

      .cta-title {
        font-size: 28px;
      }

      .hero-stats {
        gap: 28px;
      }
    }

    @media (max-width: 520px) {
      .section {
        padding: 52px 0;
      }

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

      .page-hero {
        padding: 44px 0 44px;
      }

      .hero-title {
        font-size: 27px;
      }

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

      .hero-actions {
        flex-direction: column;
      }

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

      .hero-stats {
        gap: 20px;
      }

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

      .stat-label {
        font-size: 12px;
      }

      .nav-actions .btn-primary {
        display: none;
      }

      .footer-col {
        text-align: left;
      }

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

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

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

      .faq-question {
        padding: 18px 20px;
        font-size: 15px;
      }

      .faq-answer {
        padding: 0 20px;
        font-size: 14px;
      }

      .faq-item.open .faq-answer {
        padding: 0 20px 20px;
      }
    }

/* roulang page: article */
:root {
  --primary: #0f2b46;
  --primary-dark: #081a2b;
  --accent: #18a0fb;
  --accent-hover: #0e86d6;
  --bg-body: #f4f7fb;
  --bg-section: #eef2f8;
  --card-bg: #ffffff;
  --text-main: #17233b;
  --text-weak: #5f6e83;
  --border: #e3e9f2;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(15, 43, 70, 0.06);
  --shadow-hover: 0 12px 36px rgba(15, 43, 70, 0.12);
  --transition: all 0.25s ease;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input { font-family: inherit; font-size: inherit; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; margin: 0 0 12px; color: var(--text-main); }

.grid-container { max-width: 1224px; padding-left: 24px; padding-right: 24px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.5;
}
.btn i { font-size: 15px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(15,43,70,0.16); }
.btn-primary:hover { background: #1a3b5c; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,43,70,0.22); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border-color: rgba(15,43,70,0.3); }
.btn-outline:hover { border-color: var(--primary); background: rgba(15,43,70,0.05); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 6px 20px rgba(0,0,0,0.12); }
.btn-light:hover { background: #f0f7ff; transform: translateY(-2px); color: var(--primary); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15,43,70,0.06);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.2px;
}
.brand i {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(15,43,70,0.18);
}
.brand:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 2px;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2.5px;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.28s ease;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after, .nav-links .active a::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background: #f1f4f9;
  border: 1px solid transparent;
  border-radius: 30px;
  padding: 4px 4px 4px 16px;
  transition: var(--transition);
  width: 190px;
}
.search-box:focus-within {
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(24,160,251,0.12);
  width: 220px;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 13px;
  color: var(--text-main);
}
.search-box button {
  border: none;
  background: var(--primary);
  color: #fff;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.search-box button:hover { background: var(--accent); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--primary);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 18px;
  align-items: center;
  justify-content: center;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 18px;
}
.breadcrumb a { color: rgba(255,255,255,0.85); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-size: 11px; color: rgba(255,255,255,0.5); }
.breadcrumb span { color: #fff; font-weight: 500; }

/* ===== Article Hero ===== */
.article-hero {
  background: linear-gradient(78deg, rgba(6,20,35,0.95), rgba(15,43,70,0.72)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  padding: 84px 0 72px;
  position: relative;
}
.article-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.14);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.28);
  backdrop-filter: blur(8px);
  border-radius: 30px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 18px;
}
.article-hero h1 {
  color: #fff;
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  font-weight: 800;
  max-width: 860px;
  margin-bottom: 18px;
  letter-spacing: 0.3px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: rgba(255,255,255,0.78);
  font-size: 13.5px;
}
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta i { color: rgba(255,255,255,0.6); font-size: 14px; }

/* ===== Article Body ===== */
.article-section {
  padding: 56px 0 48px;
  background: var(--bg-body);
}
.article-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(15,43,70,0.05);
  margin-bottom: 28px;
}
.article-content {
  font-size: 15px;
  color: #2c3b52;
  line-height: 1.9;
}
.article-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
  margin: 36px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg-section);
}
.article-content h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--primary);
  margin: 28px 0 12px;
}
.article-content p { margin: 0 0 18px; }
.article-content ul, .article-content ol {
  margin: 0 0 20px 0;
  padding-left: 22px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: #f7fbff;
  padding: 16px 22px;
  border-radius: 0 12px 12px 0;
  color: #2c3b52;
  margin: 0 0 22px;
  font-style: normal;
}
.article-content img {
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(15,43,70,0.1);
  margin: 12px 0 18px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 0 0 22px;
}
.article-content table th {
  background: var(--primary);
  color: #fff;
  padding: 12px 14px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,0.15);
}
.article-content table td {
  padding: 11px 14px;
  border: 1px solid var(--border);
  font-size: 14px;
}
.article-content a { color: var(--accent); border-bottom: 1px solid rgba(24,160,251,0.4); }
.article-content a:hover { color: var(--accent-hover); border-bottom-color: var(--accent); }

.article-footer-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 24px;
  margin-top: 30px;
  border-top: 1px solid var(--bg-section);
}
.article-footer-tags > span:first-child { font-size: 13.5px; color: var(--text-weak); }
.tag {
  background: #eef4fb;
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 30px;
  transition: var(--transition);
}
.tag:hover { background: var(--primary); color: #fff; }

.share-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  margin-top: 24px;
  border-top: 1px solid var(--bg-section);
  font-size: 14px;
  color: var(--text-weak);
}
.share-btn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: #f2f5fa;
  color: var(--text-weak);
  font-size: 15px;
  transition: var(--transition);
}
.share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ===== Not Found ===== */
.not-found-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 64px 40px;
  text-align: center;
  box-shadow: var(--shadow);
}
.not-found-icon {
  width: 74px;
  height: 74px;
  margin: 0 auto 22px;
  background: #fff2e8;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: #f07a3c;
}
.not-found-card h2 { font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.not-found-card p { color: var(--text-weak); margin-bottom: 26px; }

/* ===== Sidebar ===== */
.sidebar-widget {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 26px 26px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(15,43,70,0.04);
}
.sidebar-widget h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.sidebar-widget h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--bg-section);
}
.sidebar-widget h3 i { color: var(--accent); font-size: 17px; }

.about-widget p { font-size: 13.5px; color: var(--text-weak); margin-bottom: 18px; }
.btn-primary-sidebar {
  display: block;
  width: 100%;
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary-sidebar:hover { background: var(--accent); transform: translateY(-2px); color: #fff; box-shadow: 0 8px 18px rgba(24,160,251,0.25); }

.sidebar-cats li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 10px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  transition: var(--transition);
}
.sidebar-cats li a i { font-size: 11px; color: var(--accent); transition: var(--transition); }
.sidebar-cats li a:hover { background: #f2f7fd; color: var(--primary); padding-left: 16px; }
.sidebar-cats li + li { border-top: 1px solid var(--bg-section); }

.info-widget ul li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  font-size: 13.5px;
  color: var(--text-weak);
}
.info-widget ul li i { color: var(--accent); width: 20px; text-align: center; font-size: 14px; }

/* ===== Related ===== */
.related-section {
  background: var(--bg-section);
  padding: 64px 0;
}
.section-head {
  text-align: center;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}
.section-head p { color: var(--text-weak); font-size: 14.5px; }

.related-card {
  display: block;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(15,43,70,0.05);
  transition: var(--transition);
  height: 100%;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(24,160,251,0.25);
}
.related-thumb { overflow: hidden; aspect-ratio: 16 / 9; background: #dfe7f0; }
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  border-radius: 0;
}
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-body { padding: 20px 22px 24px; }
.related-cat {
  display: inline-block;
  background: #eaf4ff;
  color: var(--accent);
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 30px;
  margin-bottom: 10px;
}
.related-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin: 0 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-body p {
  font-size: 13px;
  color: var(--text-weak);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-state {
  text-align: center;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  color: var(--text-weak);
  font-size: 14.5px;
}

/* ===== Trust Bar ===== */
.trust-bar {
  background: var(--primary);
  padding: 44px 0;
}
.trust-item {
  text-align: center;
  color: #fff;
  padding: 10px 20px;
}
.trust-item i {
  font-size: 26px;
  color: var(--accent);
  margin-bottom: 10px;
  display: block;
}
.trust-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; color: #fff; }
.trust-item p { font-size: 13px; color: rgba(255,255,255,0.65); margin: 0; }
.trust-item + .trust-item { border-left: 1px solid rgba(255,255,255,0.1); }

/* ===== CTA ===== */
.article-cta {
  padding: 70px 0;
  background: linear-gradient(120deg, rgba(15,43,70,0.94), rgba(9,27,45,0.86)), url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
}
.cta-card {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-card h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 800; margin-bottom: 12px; }
.cta-card p { color: rgba(255,255,255,0.78); font-size: 15px; margin-bottom: 28px; }

/* ===== Footer ===== */
.site-footer {
  background: #081a2b;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
  font-size: 14px;
}
.footer-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand i {
  width: 38px;
  height: 38px;
  background: var(--accent);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
}
.footer-desc { font-size: 13.5px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 320px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 10px; font-size: 13.5px; }
.footer-col ul li a { color: rgba(255,255,255,0.65); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  padding: 20px 0;
  margin-top: 44px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .nav-actions .btn-outline { display: none; }
  .search-box { width: 160px; }
  .search-box:focus-within { width: 180px; }
  .article-card { padding: 32px 30px; }
}

@media (max-width: 768px) {
  .main-nav { min-height: 64px; flex-wrap: nowrap; }
  .brand { font-size: 1.05rem; }
  .brand i { width: 34px; height: 34px; font-size: 15px; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 24px 22px;
    gap: 6px;
    display: none;
    box-shadow: 0 18px 40px rgba(15,43,70,0.16);
    border-radius: 0 0 16px 16px;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; font-size: 15px; border-bottom: 1px solid #f3f6fa; width: 100%; }
  .nav-links a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .search-box { display: none; }
  .nav-actions .btn-primary { padding: 8px 14px; font-size: 13px; }
  .nav-actions .btn-primary i { font-size: 13px; }
  .article-hero { padding: 64px 0 54px; }
  .article-hero h1 { font-size: 1.75rem; }
  .article-section { padding: 32px 0; }
  .article-card { padding: 24px 18px; border-radius: 12px; }
  .article-content { font-size: 14.5px; }
  .article-content table { display: block; overflow-x: auto; }
  .sidebar-widget { padding: 20px 18px; }
  .trust-item { padding: 18px 10px; }
  .trust-item + .trust-item { border-left: none; border-top: 1px solid rgba(255,255,255,0.08); }
  .related-section { padding: 48px 0; }
  .site-footer { padding-top: 44px; }
}

@media (max-width: 520px) {
  .grid-container { padding-left: 16px; padding-right: 16px; }
  .brand span { display: none; }
  .brand { font-size: 1rem; }
  .nav-actions .btn-primary { padding: 8px 12px; font-size: 12.5px; }
  .nav-actions .btn-primary i { display: none; }
  .article-hero { padding: 52px 0 44px; }
  .article-meta { gap: 10px; font-size: 12.5px; }
  .article-card { padding: 20px 14px; }
  .share-box { flex-wrap: wrap; }
  .not-found-card { padding: 44px 20px; }
}

/* roulang page: category2 */
:root {
            --primary: #1a2b6d;
            --primary-light: #3b5bdb;
            --accent: #f97316;
            --accent-light: #ffb347;
            --dark: #0f172a;
            --bg: #f6f8fc;
            --bg-light: #eef1f8;
            --card: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(15, 23, 42, .08);
            --shadow-hover: 0 18px 40px rgba(26, 43, 109, .14);
            --transition: all .3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        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: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .grid-container {
            max-width: 1200px;
        }
        .site-header {
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border);
            padding: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            min-height: 70px;
            padding: 0 10px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -.5px;
            white-space: nowrap;
        }
        .brand i {
            color: var(--accent);
            font-size: 1.35rem;
            transition: var(--transition);
        }
        .brand:hover i {
            transform: rotate(-8deg) scale(1.08);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .nav-links li {
            margin: 0;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(59, 91, 219, .08);
        }
        .nav-links li.active a {
            color: var(--primary);
            background: rgba(59, 91, 219, .12);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 6px 6px 6px 16px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(59, 91, 219, .12);
        }
        .search-box input {
            background: transparent;
            border: none;
            width: 130px;
            font-size: .9rem;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: #94a3b8;
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            cursor: pointer;
            font-size: .8rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--accent);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: .92rem;
            font-weight: 600;
            line-height: 1.4;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 43, 109, .25);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(26, 43, 109, .3);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 43, 109, .2);
        }
        .btn-outline {
            border-color: var(--border);
            color: var(--text);
            background: #fff;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(59, 91, 219, .04);
        }
        .btn-lg {
            padding: 14px 34px;
            font-size: 1.02rem;
        }
        .nav-toggle {
            display: none;
            background: var(--bg-light);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 1.1rem;
            color: var(--text);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 95px 0 85px;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 20, 50, .88) 0%, rgba(26, 43, 109, .7) 55%, rgba(249, 115, 22, .35) 100%);
            z-index: 1;
        }
        .page-hero .grid-container {
            position: relative;
            z-index: 2;
        }
        .hero-inner {
            max-width: 760px;
        }
        .hero-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .86rem;
            color: rgba(255, 255, 255, .75);
            background: rgba(255, 255, 255, .12);
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 22px;
            backdrop-filter: blur(4px);
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, .85);
        }
        .hero-breadcrumb a:hover {
            color: #fff;
        }
        .page-hero h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -1px;
        }
        .page-hero h1 span {
            color: var(--accent-light);
        }
        .hero-desc {
            font-size: 1.12rem;
            color: rgba(255, 255, 255, .9);
            line-height: 1.8;
            margin-bottom: 30px;
            max-width: 640px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-hero {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-hero:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .5);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 36px;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: .88rem;
            color: rgba(255, 255, 255, .8);
            background: rgba(255, 255, 255, .1);
            padding: 7px 16px;
            border-radius: 50px;
        }
        .section {
            padding: 80px 0;
        }
        .section.bg-light {
            background: var(--bg-light);
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-header .badge {
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: clamp(1.7rem, 2.8vw, 2.3rem);
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark);
            letter-spacing: -.5px;
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-weak);
            font-size: 1.04rem;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .5px;
            text-transform: uppercase;
        }
        .badge-orange {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 26px;
        }
        .step-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 26px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
            text-align: left;
        }
        .step-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);
        }
        .step-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }
        .step-card:hover::before {
            opacity: 1;
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(59, 91, 219, .1);
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 22px;
            transition: var(--transition);
        }
        .step-card:hover .step-num {
            background: var(--primary);
            color: #fff;
        }
        .step-card h3 {
            font-size: 1.16rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .step-card p {
            font-size: .93rem;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(59, 91, 219, .3);
        }
        .cat-card .img-wrap {
            height: 150px;
            overflow: hidden;
            position: relative;
        }
        .cat-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .cat-card:hover .img-wrap img {
            transform: scale(1.06);
        }
        .cat-card .img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, .35));
        }
        .cat-card .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            font-size: .72rem;
            padding: 4px 12px;
        }
        .cat-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cat-card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .cat-card-body p {
            font-size: .88rem;
            color: var(--text-weak);
            flex: 1;
            margin-bottom: 16px;
            line-height: 1.65;
        }
        .cat-card-body .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: .88rem;
            font-weight: 600;
            color: var(--primary);
        }
        .cat-card-body .cat-link i {
            transition: transform .3s;
        }
        .cat-card-body .cat-link:hover {
            color: var(--accent);
        }
        .cat-card-body .cat-link:hover i {
            transform: translateX(4px);
        }
        .article-list-wrap {
            max-width: 900px;
            margin: 0 auto;
        }
        .article-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .article-item:hover {
            border-color: rgba(59, 91, 219, .3);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .article-icon {
            width: 46px;
            height: 46px;
            flex: 0 0 46px;
            border-radius: 12px;
            background: rgba(249, 115, 22, .12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }
        .article-info {
            flex: 1;
        }
        .article-info h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .article-item:hover .article-info h3 {
            color: var(--primary);
        }
        .article-info p {
            font-size: .85rem;
            color: var(--text-weak);
        }
        .article-btn {
            font-size: .85rem;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
            padding: 8px 18px;
            border-radius: 50px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .stats-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            padding: 80px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .stats-section::after {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
        }
        .stats-section::before {
            content: "";
            position: absolute;
            bottom: -40px;
            left: 20%;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(249, 115, 22, .15);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .stat-item i {
            font-size: 2rem;
            color: var(--accent-light);
            margin-bottom: 16px;
            display: block;
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-item .stat-label {
            font-size: .95rem;
            color: rgba(255, 255, 255, .75);
            margin-top: 6px;
        }
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
        }
        .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }
        .feature-content .badge {
            margin-bottom: 14px;
        }
        .feature-content h2 {
            font-size: 1.9rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--dark);
        }
        .feature-content h2 span {
            color: var(--primary);
        }
        .feature-content p {
            color: var(--text-weak);
            font-size: 1rem;
            margin-bottom: 18px;
        }
        .feature-list {
            margin-top: 10px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: .96rem;
            color: var(--text);
            border-bottom: 1px dashed var(--border);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 1rem;
        }
        .feature-list strong {
            color: var(--dark);
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(59, 91, 219, .3);
        }
        .faq-item details {
            padding: 0;
        }
        .faq-item summary {
            padding: 22px 28px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            transition: var(--transition);
            position: relative;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: .85rem;
            color: var(--primary);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(59, 91, 219, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item details[open] summary {
            color: var(--primary);
            border-bottom: 1px solid var(--border);
        }
        .faq-item details[open] summary::after {
            content: "\f068";
            background: var(--primary);
            color: #fff;
            transform: rotate(180deg);
        }
        .faq-ans {
            padding: 18px 28px 24px;
            color: var(--text-weak);
            font-size: .95rem;
            line-height: 1.85;
            background: rgba(59, 91, 219, .02);
        }
        .cta-section {
            position: relative;
            background-size: cover;
            background-position: center;
            background-image: url('/assets/images/backpic/back-2.png');
            padding: 85px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(26, 43, 109, .82));
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .8);
            padding: 60px 0 0;
        }
        .footer-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--accent);
        }
        .footer-desc {
            font-size: .92rem;
            color: rgba(255, 255, 255, .6);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: .9rem;
            color: rgba(255, 255, 255, .65);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
            padding-left: 5px;
        }
        .footer-col ul li i {
            margin-right: 6px;
            color: var(--accent-light);
            font-size: .8rem;
        }
        .footer-bottom {
            margin-top: 44px;
            padding: 22px 0;
            border-top: 1px solid rgba(255, 255, 255, .1);
            text-align: center;
            font-size: .85rem;
            color: rgba(255, 255, 255, .5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .7);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: .85rem;
            }
            .search-box input {
                width: 90px;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                flex-wrap: wrap;
                padding: 12px 10px;
                gap: 10px;
            }
            .nav-links {
                order: 4;
                width: 100%;
                display: none;
                flex-direction: column;
                background: #fff;
                padding: 10px 0;
                border-radius: var(--radius-sm);
                box-shadow: var(--shadow);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links li a {
                display: block;
                padding: 12px;
                border-radius: 8px;
            }
            .nav-actions {
                margin-left: auto;
            }
            .search-box {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .btn-outline {
                display: none;
            }
            .page-hero {
                padding: 70px 0 60px;
            }
            .hero-actions .btn-lg {
                padding: 12px 24px;
                font-size: .95rem;
            }
            .section {
                padding: 60px 0;
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .feature-img img {
                min-height: 240px;
            }
            .footer-col {
                margin-bottom: 24px;
            }
        }
        @media (max-width: 520px) {
            .brand {
                font-size: 1.05rem;
            }
            .brand i {
                font-size: 1.1rem;
            }
            .nav-actions .btn-primary {
                padding: 8px 14px;
                font-size: .8rem;
            }
            .page-hero h1 {
                font-size: 1.75rem;
            }
            .hero-desc {
                font-size: .98rem;
            }
            .hero-meta {
                gap: 8px;
            }
            .hero-meta span {
                font-size: .78rem;
                padding: 5px 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cat-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
            .article-item {
                flex-wrap: wrap;
                padding: 16px;
            }
            .article-btn {
                margin-left: auto;
            }
            .feature-content h2 {
                font-size: 1.5rem;
            }
            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-bottom {
                font-size: .78rem;
                padding: 16px 10px;
            }
        }

/* roulang page: category3 */
:root{
  --primary:#4f46e5;
  --primary-dark:#3730a3;
  --primary-light:#eef2ff;
  --secondary:#06b6d4;
  --accent:#f59e0b;
  --bg:#f8fafc;
  --surface:#ffffff;
  --ink:#0f172a;
  --text:#1e293b;
  --muted:#64748b;
  --line:#e2e8f0;
  --radius:18px;
  --radius-sm:12px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --shadow:0 10px 34px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px rgba(15,23,42,.16);
  --spacing:90px;
  --header-h:74px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button,input,textarea{font:inherit;outline:none;border:none;background:none}
button{cursor:pointer}
.container,.grid-container{max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;width:100%}
body.overflow-hidden{overflow:hidden}
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.main-nav{
  display:flex;align-items:center;gap:28px;
  min-height:var(--header-h);
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-size:1.2rem;font-weight:800;letter-spacing:.3px;
  color:var(--primary);
  white-space:nowrap;
}
.brand i{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-light);color:var(--primary);
  border-radius:12px;font-size:1rem;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.brand:hover i{background:var(--primary);color:#fff;transform:rotate(-8deg) scale(1.06)}
.nav-links{display:flex;align-items:center;gap:4px;margin:0}
.nav-links li{position:relative}
.nav-links a{
  display:block;padding:10px 16px;
  font-size:.95rem;font-weight:600;color:var(--ink);
  border-radius:10px;transition:all .25s ease;
}
.nav-links a:hover{color:var(--primary);background:var(--primary-light)}
.nav-links li.active a{color:var(--primary);background:var(--primary-light)}
.nav-links li.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:3px;
  background:var(--primary);border-radius:3px;
}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
  display:flex;align-items:center;
  background:#f1f5f9;border:1px solid transparent;
  border-radius:40px;padding:0 12px;height:42px;width:230px;
  transition:border-color .25s ease,background .25s ease;
}
.search-box:focus-within{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.search-box input{flex:1;min-width:0;background:transparent;font-size:.9rem;padding:8px 0}
.search-box input::placeholder{color:var(--muted)}
.search-box button{width:30px;height:30px;display:flex;align-items:center;justify-content:center;color:var(--muted);transition:color .2s ease}
.search-box button:hover{color:var(--primary)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:12px;font-size:.95rem;font-weight:700;
  transition:all .25s ease;border:1px solid transparent;
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 18px rgba(79,70,229,.28)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(79,70,229,.38)}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.nav-toggle{display:none;width:42px;height:42px;align-items:center;justify-content:center;font-size:1.2rem;color:var(--ink);border-radius:10px;border:1px solid var(--line)}
.nav-toggle:hover{background:var(--primary-light);color:var(--primary)}

.page-hero{
  position:relative;padding:110px 0 90px;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(15,23,42,.94) 0%,rgba(15,23,42,.78) 52%,rgba(79,70,229,.68) 100%);
}
.page-hero::after{
  content:"";position:absolute;bottom:-1px;left:0;right:0;height:80px;
  background:linear-gradient(180deg,transparent,rgba(248,250,252,1));
}
.page-hero .container{position:relative;z-index:2}
.hero-inner{max-width:780px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  border-radius:40px;font-size:.85rem;font-weight:700;letter-spacing:.6px;
  margin-bottom:22px;backdrop-filter:blur(4px);
}
.hero-badge i{color:var(--accent)}
.hero-title{
  font-size:2.9rem;font-weight:900;line-height:1.18;letter-spacing:1px;
  margin-bottom:20px;
}
.hero-title span{color:#a5b4fc}
.hero-desc{font-size:1.12rem;color:#cbd5e1;max-width:620px;margin-bottom:30px}
.hero-search{
  display:flex;align-items:center;gap:12px;
  background:#fff;border-radius:60px;padding:8px 10px 8px 22px;
  max-width:560px;box-shadow:0 16px 50px rgba(0,0,0,.24);
}
.hero-search i{color:var(--primary);font-size:1.1rem}
.hero-search input{flex:1;min-width:0;font-size:1rem;color:var(--ink);padding:8px 0}
.hero-search input::placeholder{color:var(--muted)}
.hero-search button{
  background:var(--primary);color:#fff;font-weight:700;
  padding:12px 26px;border-radius:50px;font-size:.95rem;
  transition:all .25s ease;
}
.hero-search button:hover{background:var(--primary-dark);transform:scale(1.03)}
.hero-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 8px 24px rgba(0,0,0,.16)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.22)}
.btn-glow{background:var(--primary);color:#fff;box-shadow:0 8px 26px rgba(79,70,229,.5)}
.btn-glow:hover{background:#6366f1;transform:translateY(-2px);box-shadow:0 12px 34px rgba(79,70,229,.6)}
.hero-meta{
  display:flex;align-items:center;gap:8px;margin-top:34px;
  color:#94a3b8;font-size:.88rem;
}
.hero-meta i{color:var(--accent)}

.section{padding:var(--spacing) 0}
.section-alt{background:var(--bg)}
.section-head{max-width:680px;margin-bottom:48px}
.section-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;background:var(--primary-light);color:var(--primary);
  border-radius:40px;font-size:.82rem;font-weight:800;letter-spacing:.8px;
  margin-bottom:16px;
}
.section-title{font-size:2rem;font-weight:900;line-height:1.3;color:var(--ink);margin-bottom:12px}
.section-sub{color:var(--muted);font-size:1.02rem}

.faq-cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.faq-cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;position:relative;overflow:hidden;
  transition:all .3s ease;
}
.faq-cat-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transform:scaleX(0);transform-origin:left;transition:transform .35s ease;
}
.faq-cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.faq-cat-card:hover::after{transform:scaleX(1)}
.faq-cat-icon{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-light);color:var(--primary);border-radius:14px;
  font-size:1.3rem;margin-bottom:18px;transition:all .3s ease;
}
.faq-cat-card:hover .faq-cat-icon{background:var(--primary);color:#fff}
.faq-cat-card h3{font-size:1.08rem;font-weight:800;color:var(--ink);margin-bottom:8px}
.faq-cat-card p{font-size:.9rem;color:var(--muted);margin-bottom:14px}
.faq-cat-more{font-size:.88rem;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.faq-cat-more i{transition:transform .25s ease}
.faq-cat-card:hover .faq-cat-more i{transform:translateX(4px)}

.faq-accordion{max-width:920px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  margin-bottom:14px;overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease;
}
.faq-item:hover{border-color:#c7d2fe;box-shadow:var(--shadow-sm)}
.faq-item.active{border-color:var(--primary);box-shadow:var(--shadow)}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;color:var(--ink);font-size:1.02rem;font-weight:700;
  transition:background .25s ease;
}
.faq-question:hover{background:var(--primary-light)}
.faq-question i{color:var(--primary);transition:transform .3s ease;flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg)}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height .4s ease,opacity .4s ease;
  opacity:0;
}
.faq-item.active .faq-answer{max-height:400px;opacity:1}
.faq-answer p{
  padding:0 24px 22px;color:var(--muted);font-size:.95rem;line-height:1.8;
  border-top:1px dashed var(--line);padding-top:18px;margin-left:24px;margin-right:24px;
}

.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.topic-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;display:flex;flex-direction:column;gap:12px;
  transition:all .3s ease;position:relative;
}
.topic-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.topic-tag{
  align-self:flex-start;padding:4px 12px;border-radius:30px;
  background:var(--primary-light);color:var(--primary);font-size:.78rem;font-weight:800;
  letter-spacing:.4px;
}
.topic-tag.tag-cyan{background:#cffafe;color:#0e7490}
.topic-tag.tag-amber{background:#fef3c7;color:#b45309}
.topic-card h3{font-size:1.02rem;font-weight:800;color:var(--ink);line-height:1.45}
.topic-card p{font-size:.9rem;color:var(--muted);line-height:1.75;flex:1}
.topic-link{
  font-size:.88rem;font-weight:700;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;transition:gap .25s ease;
}
.topic-card:hover .topic-link{gap:10px}

.stats-section{
  padding:var(--spacing) 0;
  background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%);
  color:#fff;position:relative;overflow:hidden;
}
.stats-section::before{
  content:"";position:absolute;top:-90px;right:-80px;width:360px;height:360px;border-radius:50%;
  background:rgba(79,70,229,.2);filter:blur(70px);
}
.stats-section::after{
  content:"";position:absolute;bottom:-110px;left:-60px;width:300px;height:300px;border-radius:50%;
  background:rgba(6,182,212,.16);filter:blur(80px);
}
.stats-section .container{position:relative;z-index:2}
.stats-head{max-width:620px;margin-bottom:44px}
.stats-head .section-title{color:#fff}
.stats-head .section-sub{color:#94a3b8}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat-item{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:30px 24px;text-align:center;
  backdrop-filter:blur(6px);transition:transform .3s ease,background .3s ease;
}
.stat-item:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.stat-icon{width:46px;height:46px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:rgba(255,255,255,.14);font-size:1.1rem;color:#a5b4fc}
.stat-number{font-size:2.2rem;font-weight:900;letter-spacing:.6px;margin-bottom:4px}
.stat-number em{font-style:normal;font-size:1.3rem;margin-left:2px;color:#94a3b8}
.stat-label{color:#94a3b8;font-size:.9rem}

.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;position:relative;transition:all .3s ease;
}
.step-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.step-num{
  width:42px;height:42px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-light);color:var(--primary);
  border-radius:12px;font-weight:900;font-size:1.05rem;margin-bottom:18px;
}
.step-item h3{font-size:1.02rem;font-weight:800;color:var(--ink);margin-bottom:8px}
.step-item p{font-size:.9rem;color:var(--muted);margin:0}

.updates-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.update-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:all .3s ease;
}
.update-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.update-media{height:178px;overflow:hidden;position:relative}
.update-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.update-card:hover .update-media img{transform:scale(1.06)}
.update-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(15,23,42,.30))}
.update-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.update-body .topic-tag{margin-bottom:12px}
.update-body h3{font-size:1.05rem;font-weight:800;color:var(--ink);line-height:1.45;margin-bottom:10px}
.update-body p{font-size:.9rem;color:var(--muted);line-height:1.75;flex:1}
.update-meta{display:flex;align-items:center;gap:10px;margin-top:14px;color:var(--muted);font-size:.82rem}
.update-meta i{color:var(--primary)}

.cta-box{
  position:relative;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-radius:28px;padding:72px 60px;overflow:hidden;color:#fff;
  text-align:center;
}
.cta-box::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(79,70,229,.92),rgba(15,23,42,.88))}
.cta-box>*{position:relative;z-index:2}
.cta-title{font-size:2.1rem;font-weight:900;letter-spacing:.8px;margin-bottom:14px}
.cta-sub{color:#dbeafe;font-size:1.05rem;max-width:560px;margin:0 auto 30px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-cta{background:#fff;color:var(--primary);padding:15px 34px;font-size:1rem;border-radius:14px;font-weight:800;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.btn-cta:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,0,0,.25)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.36);padding:15px 34px;font-size:1rem;border-radius:14px;font-weight:800;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.24);transform:translateY(-3px)}

.site-footer{
  background:var(--ink);color:#94a3b8;padding:72px 0 0;margin-top:0;
}
.site-footer .grid-x{padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:1.18rem;font-weight:800;margin-bottom:16px;
}
.footer-brand i{color:#a5b4fc;font-size:1.15rem}
.footer-desc{font-size:.92rem;line-height:1.8;margin:0}
.footer-col h4{color:#fff;font-size:1rem;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px;font-size:.9rem}
.footer-col ul a{transition:color .2s ease, padding-left .2s ease}
.footer-col ul a:hover{color:#a5b4fc;padding-left:5px}
.footer-bottom{
  padding:24px 0;text-align:center;color:#64748b;font-size:.86rem;
}

a:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid rgba(79,70,229,.4);outline-offset:2px;border-radius:4px;
}

@media(max-width:1024px){
  :root{--spacing:72px}
  .faq-cat-grid{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .updates-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .search-box{width:190px}
  .nav-actions .btn-outline{display:none}
  .hero-title{font-size:2.4rem}
  .cta-box{padding:60px 34px}
}
@media(max-width:900px){
  .nav-links{
    position:fixed;top:var(--header-h);left:0;right:0;z-index:990;
    background:var(--surface);flex-direction:column;align-items:stretch;
    padding:16px 24px 24px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-lg);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links li.active::after{display:none}
  .nav-links a{padding:14px 16px;font-size:1rem}
  .nav-toggle{display:inline-flex}
  .search-box{display:none}
  .hero-title{font-size:2rem}
  .hero-desc{font-size:1rem}
}
@media(max-width:640px){
  :root{--spacing:56px}
  .container,.grid-container{padding-left:18px;padding-right:18px}
  .brand{font-size:1.05rem}
  .brand i{width:34px;height:34px;font-size:.9rem}
  .nav-actions .btn{display:none}
  .page-hero{padding:80px 0 64px}
  .hero-title{font-size:1.7rem;letter-spacing:.4px}
  .hero-search{padding:6px 6px 6px 16px}
  .hero-search input{font-size:.9rem}
  .hero-search button{padding:10px 16px;font-size:.85rem}
  .hero-actions .btn{padding:11px 18px;font-size:.88rem}
  .faq-cat-grid{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .updates-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:14px}
  .section-title{font-size:1.5rem}
  .section-head{margin-bottom:32px}
  .faq-question{padding:16px 18px;font-size:.95rem}
  .faq-answer p{padding-left:18px;padding-right:18px;margin-left:0;margin-right:0}
  .cta-box{padding:48px 20px;border-radius:20px}
  .cta-title{font-size:1.55rem}
  .cta-actions .btn{padding:13px 22px;font-size:.92rem}
  .footer-bottom{font-size:.78rem;line-height:1.6}
  .site-footer{padding-top:52px}
}