/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --accent: #0ea5e9;
  --bg: #f8fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(15, 46, 107, 0.08);
  --shadow-hover: 0 8px 32px rgba(15, 46, 107, 0.16);
  --transition: all 0.3s ease;
  --container: 1200px;
  --header-h: 72px;
}
*, *::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;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 90px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-head .tag-line {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; padding: 6px 18px; border-radius: 30px;
  letter-spacing: 0.5px; margin-bottom: 16px;
}
.section-head h2 { font-size: 36px; line-height: 1.3; font-weight: 800; color: var(--text); margin-bottom: 14px; letter-spacing: -0.5px; }
.section-head p { color: var(--text-light); font-size: 16px; line-height: 1.8; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226,232,240,0.7);
  height: var(--header-h);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: var(--text); letter-spacing: -0.3px; }
.logo .logo-badge {
  display: inline-block; width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px; font-weight: 700;
}
.main-nav { display: flex; align-items: center; gap: 8px; }
.main-nav a {
  display: inline-block; padding: 8px 20px; border-radius: 24px;
  font-size: 15px; font-weight: 500; color: var(--text-light);
  transition: var(--transition);
}
.main-nav a:hover { background: var(--primary-light); color: var(--primary); }
.main-nav a.active { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: #fff !important;
  padding: 9px 22px !important; border-radius: 24px;
  font-weight: 600; font-size: 14px;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(37,99,235,0.3); }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; align-items: center; justify-content: center; background: var(--primary-light); color: var(--primary); font-size: 18px; }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 620px; display: flex; align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.55) 50%, rgba(15,23,42,0.2) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 720px; padding: 80px 0; }
.hero .hero-tag {
  display: inline-block; background: rgba(255,255,255,0.18); backdrop-filter: blur(4px);
  color: #fff; border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 20px; border-radius: 30px; font-size: 13px; font-weight: 500; letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 52px; font-weight: 800; color: #fff; line-height: 1.2;
  letter-spacing: -1px; margin-bottom: 20px;
}
.hero h1 span { color: #93c5fd; }
.hero p {
  font-size: 18px; color: rgba(255,255,255,0.85); line-height: 1.8;
  max-width: 560px; margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: 30px; font-size: 15px; font-weight: 600;
  transition: var(--transition); border: 2px solid transparent; line-height: 1.2;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(37,99,235,0.35); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(37,99,235,0.4); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); backdrop-filter: blur(4px); }
.btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); }
.hero-stats {
  display: flex; gap: 44px; margin-top: 48px; padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.2);
}
.hero-stats .stat { color: #fff; }
.hero-stats .stat .num { font-size: 32px; font-weight: 800; display: block; line-height: 1.2; }
.hero-stats .stat .label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ===== Features ===== */
.features { background: var(--white); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.feature-card {
  background: var(--bg); border-radius: var(--radius); padding: 36px 30px;
  border: 1px solid var(--border); transition: var(--transition); position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; width: 80px; height: 80px; bottom: -40px; right: -40px;
  background: var(--primary); opacity: 0.04; border-radius: 50%;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.feature-icon {
  width: 60px; height: 60px; border-radius: 16px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 22px;
}
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ===== Category Entry ===== */
.category-section { background: var(--bg); }
.category-card {
  position: relative; border-radius: 24px; overflow: hidden; min-height: 320px;
  display: flex; align-items: center;
  background-image: url('/assets/images/coverpic/cover-1.png');
  background-size: cover; background-position: center;
  padding: 48px; color: #fff;
}
.category-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,23,42,0.85) 20%, rgba(15,23,42,0.3)); }
.category-card-content { position: relative; z-index: 2; max-width: 520px; }
.category-card h3 { font-size: 34px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; }
.category-card p { font-size: 16px; color: rgba(255,255,255,0.85); margin-bottom: 24px; line-height: 1.8; }
.category-card .btn { margin-top: 6px; }

/* ===== Latest Posts ===== */
.latest-section { background: var(--white); }
.posts-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.post-card {
  background: var(--bg); border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--border); transition: var(--transition);
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 180px;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; background: #fff; }
.post-card .post-title { font-size: 18px; font-weight: 700; color: var(--text); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card:hover .post-title { color: var(--primary); }
.post-card .post-summary { font-size: 14px; color: var(--text-light); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; flex-grow: 1; }
.post-meta { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--text-light); }
.post-meta .cat-tag {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  padding: 3px 12px; border-radius: 20px; font-weight: 600; font-size: 12px;
}
.empty-tip {
  text-align: center; padding: 60px 20px; color: var(--text-light);
  font-size: 16px; background: var(--bg); border-radius: var(--radius); border: 1px dashed var(--border);
  grid-column: 1 / -1;
}

/* ===== Stats ===== */
.stats-section {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center; background-attachment: fixed;
  position: relative; padding: 90px 0;
}
.stats-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,23,42,0.82); }
.stats-wrap { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stat-item { padding: 20px; }
.stat-item .icon { font-size: 32px; color: #93c5fd; margin-bottom: 12px; }
.stat-item .num { font-size: 42px; font-weight: 800; color: #fff; line-height: 1.2; }
.stat-item .label { font-size: 15px; color: rgba(255,255,255,0.7); margin-top: 6px; }

/* ===== Featured Content ===== */
.featured-section { background: var(--bg); }
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.featured-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: var(--transition);
  display: flex; flex-direction: column;
}
.featured-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.featured-card img { width: 100%; height: 200px; object-fit: cover; }
.featured-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.featured-body .tag {
  align-self: flex-start; background: var(--primary-light); color: var(--primary);
  font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 20px; margin-bottom: 14px;
}
.featured-body h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; line-height: 1.5; }
.featured-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; flex: 1; }
.featured-body .link { margin-top: 16px; font-weight: 600; font-size: 14px; color: var(--primary); }
.featured-body .link:hover { color: var(--primary-dark); gap: 4px; display: inline-flex; align-items: center; }

/* ===== FAQ ===== */
.faq-section { background: var(--white); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg); border-radius: var(--radius); padding: 26px 30px;
  border: 1px solid var(--border); margin-bottom: 16px; transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.faq-item h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 10px; display: flex; align-items: center; gap: 12px; }
.faq-item h3::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--primary); flex-shrink: 0;
}
.faq-item p { font-size: 14px; color: var(--text-light); line-height: 1.8; padding-left: 20px; }

/* ===== CTA ===== */
.cta-section {
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover; background-position: center;
  position: relative; padding: 100px 0; text-align: center;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(37,99,235,0.92), rgba(14,165,233,0.88)); }
.cta-content { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; }
.cta-content h2 { font-size: 38px; font-weight: 800; color: #fff; margin-bottom: 16px; letter-spacing: -0.5px; }
.cta-content p { font-size: 17px; color: rgba(255,255,255,0.85); margin-bottom: 32px; line-height: 1.8; }
.cta-content .btn-light { margin: 0 8px; }
.cta-content .btn-outline { margin: 0 8px; }

/* ===== Footer ===== */
.site-footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 70px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 50px; }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 340px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer-col a { display: block; padding: 6px 0; color: rgba(255,255,255,0.6); font-size: 14px; }
.footer-col a:hover { color: #93c5fd; padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-wrap { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 42px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 70px 0; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .main-nav.open {
    display: flex; position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; background: #fff; padding: 20px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-hover);
    gap: 8px; align-items: stretch; z-index: 999;
  }
  .main-nav.open a { padding: 14px 20px; border-radius: var(--radius-sm); }
  .main-nav.open .nav-cta { justify-content: center; }
  .hero { min-height: 520px; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stats .stat .num { font-size: 24px; }
  .posts-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-wrap { grid-template-columns: 1fr 1fr; gap: 20px; }
  .category-card { padding: 32px 24px; min-height: 260px; }
  .category-card h3 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
  .section-head h2 { font-size: 28px; }
  .cta-content h2 { font-size: 28px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; }
  .stats-wrap { grid-template-columns: 1fr; }
  .stat-item .num { font-size: 34px; }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-card img { height: 170px; }
  .btn { padding: 12px 24px; font-size: 14px; }
}

/* roulang page: category1 */
:root {
      --primary: #1a4f8b;
      --primary-dark: #123a68;
      --primary-light: #e8f1fb;
      --accent: #f5a623;
      --accent-dark: #d98f0f;
      --bg-body: #f5f7fb;
      --bg-section: #ffffff;
      --bg-soft: #f0f4f9;
      --text-main: #1f2a37;
      --text-muted: #637083;
      --border-color: #e3e9f0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(16, 34, 58, 0.06);
      --shadow-md: 0 8px 24px rgba(16, 34, 58, 0.09);
      --shadow-lg: 0 18px 44px rgba(16, 34, 58, 0.13);
      --transition: all 0.28s ease;
      --container-w: 1220px;
    }

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

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

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

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

    ul {
      list-style: none;
    }

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }

    .section-header h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-header p {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .section-tag {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 7px 18px;
      border-radius: 40px;
      margin-bottom: 18px;
    }

    .section-tag.light {
      background: rgba(255, 255, 255, 0.16);
      color: #fff;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1;
      padding: 15px 30px;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      letter-spacing: 0.2px;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 8px 20px rgba(26, 79, 139, 0.3);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(26, 79, 139, 0.38);
    }

    .btn-outline {
      background: transparent;
      color: #fff;
      border: 1.5px solid rgba(255, 255, 255, 0.7);
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      transform: translateY(-2px);
    }

    .btn-light {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }

    .btn-light:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.16);
    }

    .btn:focus-visible,
    a:focus-visible,
    .nav-toggle:focus-visible {
      outline: 3px solid rgba(245, 166, 35, 0.55);
      outline-offset: 3px;
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 12px rgba(16, 34, 58, 0.05);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      white-space: nowrap;
    }

    .logo-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary) 0%, #2e7ada 100%);
      color: #fff;
      font-size: 15px;
      font-weight: 900;
      border-radius: 13px;
      box-shadow: 0 4px 14px rgba(26, 79, 139, 0.35);
      letter-spacing: 0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 34px;
    }

    .main-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }

    .main-nav a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0;
      height: 2.5px;
      background: var(--accent);
      border-radius: 2px;
      transition: var(--transition);
    }

    .main-nav a:hover {
      color: var(--primary);
    }

    .main-nav a:hover::after,
    .main-nav a.active::after {
      width: 100%;
    }

    .main-nav a.active {
      color: var(--primary);
      font-weight: 700;
    }

    .main-nav .nav-cta {
      background: var(--primary);
      color: #fff !important;
      padding: 11px 22px;
      border-radius: 40px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .main-nav .nav-cta::after {
      display: none;
    }

    .main-nav .nav-cta:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(26, 79, 139, 0.3);
      color: #fff;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

    .nav-toggle:hover {
      background: var(--bg-soft);
    }

    /* ===== Page Hero ===== */
    .page-hero {
      background-size: cover;
      background-position: center;
      padding: 110px 0 130px;
      position: relative;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(14, 34, 56, 0.92) 0%, rgba(24, 66, 108, 0.82) 55%, rgba(35, 91, 148, 0.7) 100%);
      z-index: 1;
    }

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

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      margin-bottom: 18px;
    }

    .breadcrumb a {
      color: rgba(255, 255, 255, 0.85);
    }

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

    .breadcrumb-sep {
      opacity: 0.5;
    }

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

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.14);
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      padding: 8px 18px;
      border-radius: 40px;
      margin-bottom: 22px;
      backdrop-filter: blur(4px);
    }

    .page-hero h1 {
      font-size: 48px;
      font-weight: 900;
      color: #fff;
      line-height: 1.2;
      letter-spacing: -1px;
      margin-bottom: 18px;
    }

    .page-hero h1 i {
      font-style: normal;
      background: linear-gradient(135deg, var(--accent) 0%, #ffbe56 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .page-hero .hero-subtitle {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.88);
      max-width: 680px;
      line-height: 1.8;
      margin-bottom: 34px;
    }

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

    /* ===== Stats ===== */
    .stats-section {
      margin-top: -60px;
      position: relative;
      z-index: 3;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #fff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      padding: 38px 30px;
      border: 1px solid rgba(227, 233, 240, 0.7);
    }

    .stat-card {
      text-align: center;
      padding: 16px 10px;
      border-right: 1px solid var(--border-color);
    }

    .stat-card:last-child {
      border-right: none;
    }

    .stat-number {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }

    .stat-number span {
      font-size: 24px;
      color: var(--accent);
    }

    .stat-label {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* ===== Steps ===== */
    .steps-section {
      padding: 100px 0;
      background: var(--bg-section);
    }

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

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

    .step-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: var(--transition);
    }

    .step-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-5px);
      border-color: rgba(26, 79, 139, 0.2);
    }

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

    .step-number {
      font-size: 44px;
      font-weight: 900;
      color: var(--primary);
      opacity: 0.15;
      line-height: 1;
      margin-bottom: 20px;
      letter-spacing: -2px;
    }

    .step-card:hover .step-number {
      opacity: 0.3;
    }

    .step-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* ===== Feature ===== */
    .feature-section {
      padding: 100px 0;
      background: var(--bg-soft);
    }

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

    .feature-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .feature-media img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .feature-media:hover img {
      transform: scale(1.04);
    }

    .media-badge {
      position: absolute;
      left: 20px;
      bottom: 20px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(8px);
      padding: 12px 20px;
      border-radius: 40px;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      gap: 9px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    }

    .media-badge i {
      color: var(--accent);
      font-size: 18px;
    }

    .feature-content h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .feature-content p {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.85;
      margin-bottom: 26px;
    }

    .feature-list li {
      display: flex;
      align-items: center;
      gap: 13px;
      padding: 12px 0;
      font-size: 15.5px;
      font-weight: 500;
      color: var(--text-main);
      border-bottom: 1px dashed var(--border-color);
    }

    .feature-list li:last-child {
      border-bottom: none;
    }

    .feature-list li i {
      width: 32px;
      height: 32px;
      flex: 0 0 32px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      font-size: 13px;
      font-weight: 900;
    }

    /* ===== Tutorials ===== */
    .tutorials-section {
      padding: 100px 0;
      background: var(--bg-section);
    }

    .tutorials-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 26px;
    }

    .tutorial-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 26px;
      text-align: center;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .tutorial-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-6px);
      border-color: rgba(26, 79, 139, 0.25);
    }

    .tutorial-icon {
      width: 74px;
      height: 74px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--primary), #2e7ada);
      color: #fff;
      font-size: 28px;
      border-radius: 20px;
      margin-bottom: 24px;
      box-shadow: 0 10px 26px rgba(26, 79, 139, 0.32);
    }

    .tutorial-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .tutorial-card p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 22px;
      flex: 1;
    }

    .tutorial-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }

    .tutorial-link:hover {
      color: var(--accent-dark);
      gap: 11px;
    }

    /* ===== Tips ===== */
    .tips-section {
      padding: 96px 0;
      background: linear-gradient(135deg, #122e4d 0%, #1b4a7a 100%);
      position: relative;
      overflow: hidden;
    }

    .tips-section::before {
      content: "";
      position: absolute;
      right: -80px;
      top: -80px;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(245, 166, 35, 0.18) 0%, transparent 70%);
      border-radius: 50%;
    }

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

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

    .tips-section .section-tag {
      background: rgba(255, 255, 255, 0.14);
      color: #ffd08a;
    }

    .tips-list {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .tips-list li {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      color: rgba(255, 255, 255, 0.9);
      font-size: 15px;
      line-height: 1.7;
      display: flex;
      align-items: flex-start;
      gap: 13px;
      transition: var(--transition);
      backdrop-filter: blur(6px);
    }

    .tips-list li:hover {
      background: rgba(255, 255, 255, 0.14);
      transform: translateX(4px);
    }

    .tips-list li i {
      color: var(--accent);
      font-size: 18px;
      margin-top: 3px;
      flex-shrink: 0;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 100px 0;
      background: var(--bg-section);
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 22px;
      max-width: 980px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-body);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 30px;
      transition: var(--transition);
    }

    .faq-item:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(26, 79, 139, 0.2);
    }

    .faq-item h3 {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .faq-item h3::before {
      content: "\f059";
      font-family: "Font Awesome 6 Free";
      font-weight: 400;
      color: var(--accent);
      font-size: 18px;
      margin-top: 2px;
      flex-shrink: 0;
    }

    .faq-item p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.75;
      padding-left: 28px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 80px 0 100px;
      background: var(--bg-section);
    }

    .cta-box {
      background: linear-gradient(135deg, var(--primary) 0%, #2e7ada 100%);
      border-radius: var(--radius-lg);
      padding: 60px 52px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      left: -60px;
      bottom: -90px;
      width: 260px;
      height: 260px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
    }

    .cta-box::after {
      content: "";
      position: absolute;
      right: -40px;
      top: -60px;
      width: 190px;
      height: 190px;
      background: rgba(245, 166, 35, 0.18);
      border-radius: 50%;
    }

    .cta-box h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
      letter-spacing: -0.5px;
    }

    .cta-box p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.8);
      margin-bottom: 28px;
      position: relative;
      z-index: 1;
    }

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

    /* ===== Footer ===== */
    .site-footer {
      background: #0f1f31;
      color: rgba(255, 255, 255, 0.72);
      padding: 70px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 42px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .logo {
      color: #fff;
      margin-bottom: 18px;
    }

    .footer-brand p {
      font-size: 14.5px;
      line-height: 1.8;
      max-width: 360px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .footer-col a {
      display: block;
      color: rgba(255, 255, 255, 0.6);
      font-size: 14.5px;
      padding: 6px 0;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: var(--accent);
      padding-left: 4px;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 24px 0;
      font-size: 13.5px;
      color: rgba(255, 255, 255, 0.44);
      flex-wrap: wrap;
      gap: 10px;
    }

    .footer-bottom a {
      color: rgba(255, 255, 255, 0.6);
    }

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

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
      }

      .stat-card {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 14px 6px;
      }

      .stat-card:nth-child(3),
      .stat-card:nth-child(4) {
        border-bottom: none;
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 22px;
      }

      .tutorials-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 22px;
      }

      .feature-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .feature-media img {
        height: 340px;
      }

      .page-hero h1 {
        font-size: 38px;
      }
    }

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

      .nav-toggle {
        display: inline-flex;
      }

      .main-nav {
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px 20px 20px;
        box-shadow: 0 20px 36px rgba(16, 34, 58, 0.12);
        border-bottom: 1px solid var(--border-color);
        display: none;
        border-radius: 0 0 18px 18px;
      }

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

      .main-nav a {
        padding: 14px 10px;
        font-size: 16px;
        border-bottom: 1px solid var(--border-color);
      }

      .main-nav a:last-child {
        border-bottom: none;
      }

      .main-nav .nav-cta {
        justify-content: center;
        margin-top: 12px;
      }

      .main-nav a::after {
        display: none;
      }

      .page-hero {
        padding: 80px 0 110px;
      }

      .page-hero h1 {
        font-size: 32px;
      }

      .page-hero .hero-subtitle {
        font-size: 15.5px;
      }

      .stats-section {
        margin-top: -40px;
      }

      .stats-grid {
        padding: 26px 18px;
      }

      .stat-number {
        font-size: 32px;
      }

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

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

      .features-grid,
      .faq-grid {
        grid-template-columns: 1fr;
      }

      .faq-item {
        padding: 22px 22px;
      }

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

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

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

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
    }

    @media (max-width: 520px) {
      .header-inner {
        height: 66px;
      }

      .main-nav {
        top: 66px;
      }

      .logo {
        font-size: 17px;
      }

      .logo-badge {
        width: 36px;
        height: 36px;
        font-size: 13px;
        border-radius: 11px;
      }

      .page-hero {
        padding: 60px 0 90px;
      }

      .page-hero h1 {
        font-size: 27px;
      }

      .page-hero .hero-subtitle {
        font-size: 14.5px;
      }

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

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

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

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

      .stat-card {
        border-bottom: 1px solid var(--border-color);
      }

      .stat-card:nth-child(3) {
        border-bottom: 1px solid var(--border-color);
      }

      .stat-card:last-child {
        border-bottom: none;
      }

      .feature-media img {
        height: 240px;
      }

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

      .cta-box {
        padding: 36px 20px;
      }

      .cta-box h2 {
        font-size: 22px;
      }

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

/* roulang page: article */
/* ===== Design Tokens ===== */
:root {
  --primary: #123c8a;
  --primary-dark: #0b2a63;
  --primary-light: #1d4fb0;
  --accent: #d9a441;
  --accent-hover: #c08c24;
  --bg-body: #f3f6fc;
  --bg-light: #ffffff;
  --bg-dark: #0a1733;
  --text-main: #1f2a44;
  --text-weak: #6b7a99;
  --border: #e2e8f2;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(18, 60, 138, 0.07);
  --shadow-md: 0 8px 24px rgba(18, 60, 138, 0.10);
  --shadow-lg: 0 16px 44px rgba(18, 60, 138, 0.15);
  --transition: all 0.25s ease;
}

/* ===== Base ===== */
*, *::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;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

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

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 6px 18px rgba(217, 164, 65, 0.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(217, 164, 65, 0.4);
}
.btn-primary:focus-visible,
.btn-outline:focus-visible,
.btn-light-outline:focus-visible {
  outline: 3px solid rgba(217, 164, 65, 0.5);
  outline-offset: 2px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-light-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 2px solid rgba(255, 255, 255, 0.55);
  color: #fff;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  background: transparent;
}
.btn-light-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.btn-sm { padding: 9px 22px; font-size: 14px; }

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(18, 60, 138, 0.08);
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-head h2 { font-size: 32px; font-weight: 800; color: var(--text-main); letter-spacing: -0.5px; line-height: 1.3; }
.section-head p { color: var(--text-weak); margin-top: 14px; font-size: 16px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 2px 16px rgba(18, 60, 138, 0.07);
  border-bottom: 1px solid rgba(226, 232, 242, 0.7);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  white-space: nowrap;
}
.logo:hover { color: var(--primary); }
.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  box-shadow: 0 4px 12px rgba(18, 60, 138, 0.28);
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  position: relative;
}
.main-nav a:hover { background: #eff3fb; color: var(--primary); }
.main-nav a.active { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 4px 14px rgba(18, 60, 138, 0.24); }
.main-nav a.nav-cta {
  background: linear-gradient(135deg, var(--accent), #e9b85c);
  color: #fff;
  font-weight: 600;
  margin-left: 8px;
  box-shadow: 0 4px 14px rgba(217, 164, 65, 0.32);
}
.main-nav a.nav-cta:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(217, 164, 65, 0.42);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #f3f6fc;
  color: var(--primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover { background: #e8eef7; }

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 86px 0 96px;
  background:
    linear-gradient(130deg, rgba(10, 33, 77, 0.94) 0%, rgba(18, 60, 138, 0.82) 60%, rgba(29, 79, 176, 0.66) 100%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.article-hero::after {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 28px;
}
.breadcrumb a { display: inline-flex; align-items: center; gap: 6px; color: rgba(255, 255, 255, 0.8); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { font-size: 12px; opacity: 0.6; }
.article-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  backdrop-filter: blur(6px);
}
.article-hero h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.28;
  max-width: 860px;
  margin: 20px 0 22px;
  letter-spacing: -0.6px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}
.meta-item { display: inline-flex; align-items: center; gap: 7px; }
.meta-item i { color: var(--accent); }
.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  font-size: 12px;
  color: #fff;
}

/* ===== Article Main ===== */
.article-main { padding: 60px 0 80px; }
.article-card {
  background: var(--bg-light);
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  padding: 48px;
  margin-bottom: 28px;
}
.article-content {
  font-size: 16.5px;
  line-height: 1.9;
  color: #3a4668;
  word-wrap: break-word;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin: 38px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
  letter-spacing: -0.3px;
}
.article-content h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-main);
  margin: 30px 0 14px;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin: 24px 0 12px;
}
.article-content p { margin-bottom: 18px; }
.article-content img {
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  margin: 26px 0;
  border: 1px solid var(--border);
}
.article-content ul,
.article-content ol {
  margin: 0 0 20px 26px;
  list-style: disc;
}
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 8px; padding-left: 4px; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: #f7f8fc;
  padding: 18px 24px;
  border-radius: 0 14px 14px 0;
  margin: 26px 0;
  color: #4c5770;
}
.article-content a { color: var(--primary-light); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary); }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
}
.article-content table th { background: #f0f3fa; font-weight: 700; }

.not-found {
  text-align: center;
  padding: 64px 30px;
}
.not-found-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: #f0f4fb;
  border-radius: 50%;
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 24px;
}
.not-found h2 { font-size: 28px; color: var(--text-main); margin-bottom: 12px; }
.not-found p { color: var(--text-weak); margin-bottom: 28px; }

/* ===== Article Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tag-label { font-size: 14px; font-weight: 600; color: var(--text-weak); }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: #f0f3fa;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
}
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== Article Bottom CTA ===== */
.article-bottom-cta {
  margin-top: 24px;
  padding: 32px 36px;
  background: linear-gradient(135deg, #f0f5ff 0%, #ffffff 100%);
  border: 1px solid var(--border);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.article-bottom-cta .bottom-cta-text h3 { font-size: 20px; font-weight: 700; color: var(--text-main); }
.article-bottom-cta .bottom-cta-text p { font-size: 14px; color: var(--text-weak); margin-top: 4px; }
.article-bottom-cta .bottom-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Sidebar ===== */
.article-sidebar { position: sticky; top: 96px; }
.sidebar-cover {
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.sidebar-cover img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform 0.4s ease; }
.sidebar-cover:hover img { transform: scale(1.04); }
.sidebar-widget {
  background: var(--bg-light);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 28px;
  margin-bottom: 24px;
}
.widget-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 12px;
}
.widget-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 4px;
  background: var(--accent);
  border-radius: 99px;
}
.widget-list li {
  padding: 13px 0;
  border-bottom: 1px dashed var(--border);
}
.widget-list li:last-child { border-bottom: none; padding-bottom: 0; }
.widget-list li a {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.widget-list-title { font-size: 14.5px; font-weight: 500; color: var(--text-main); line-height: 1.5; }
.widget-list-title:hover { color: var(--primary); }
.widget-time { font-size: 12px; color: var(--text-weak); display: inline-flex; align-items: center; gap: 5px; }
.widget-empty { font-size: 14px; color: var(--text-weak); padding: 16px 0; }
.widget-categories { display: flex; flex-direction: column; gap: 10px; }
.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: #f5f7fb;
  border: 1px solid var(--border);
  border-radius: 14px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
  transition: var(--transition);
}
.category-link i { font-size: 13px; transition: transform 0.25s ease; }
.category-link:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateX(5px);
}
.category-link:hover i { transform: translateX(3px); }
.sidebar-promo {
  background: linear-gradient(150deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 20px;
  padding: 32px 28px;
  color: #fff;
  box-shadow: var(--shadow-md);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.sidebar-promo h4 { font-size: 20px; margin-bottom: 10px; line-height: 1.4; }
.sidebar-promo p { font-size: 14px; opacity: 0.85; margin-bottom: 22px; line-height: 1.7; }
.sidebar-promo .btn-primary { background: var(--accent); box-shadow: 0 6px 20px rgba(217, 164, 65, 0.35); }
.sidebar-promo .btn-primary:hover { background: var(--accent-hover); }

/* ===== Related / Content Nav ===== */
.related-section { padding: 80px 0; background: #ffffff; border-top: 1px solid var(--border); }
.related-card {
  display: flex;
  flex-direction: column;
  background: #f7f9fd;
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 0 0 28px;
  height: 100%;
  overflow: hidden;
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  background: #fff;
  border-color: rgba(18, 60, 138, 0.15);
}
.related-cover { overflow: hidden; height: 180px; }
.related-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-cover img { transform: scale(1.06); }
.related-card-body { padding: 24px 24px 0; display: flex; flex-direction: column; flex: 1; }
.related-cat {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.related-card h3 { font-size: 18px; font-weight: 700; color: var(--text-main); margin: 10px 0 8px; line-height: 1.5; }
.related-card p { font-size: 14px; color: var(--text-weak); line-height: 1.7; flex: 1; }
.related-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.related-more i { transition: transform 0.25s ease; }
.related-card:hover .related-more i { transform: translateX(5px); }

/* ===== FAQ ===== */
.faq-section { padding: 80px 0; background: var(--bg-body); }
.faq-list { max-width: 840px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-md); border-color: rgba(18, 60, 138, 0.2); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  color: var(--text-main);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i {
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-item[open] { border-color: rgba(18, 60, 138, 0.2); }
.faq-answer { padding: 0 28px 26px; color: var(--text-weak); font-size: 15px; line-height: 1.85; }
.faq-answer p { margin-bottom: 10px; }
.faq-answer p:last-child { margin-bottom: 0; }

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background:
    linear-gradient(130deg, rgba(10, 33, 77, 0.94) 0%, rgba(18, 60, 138, 0.85) 100%),
    url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
}
.cta-box {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
  padding: 56px 52px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
}
.cta-box h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; line-height: 1.3; letter-spacing: -0.5px; }
.cta-box p { font-size: 16px; opacity: 0.85; margin-bottom: 32px; line-height: 1.8; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.cta-stat { text-align: center; }
.cta-stat strong { display: block; font-size: 30px; font-weight: 800; color: var(--accent); }
.cta-stat span { font-size: 13px; color: rgba(255, 255, 255, 0.7); }

/* ===== Footer ===== */
.site-footer { background: var(--bg-dark); color: #b6c2d9; padding: 70px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo { color: #fff; }
.footer-brand .logo .logo-badge { background: linear-gradient(135deg, var(--accent), #e9b85c); color: var(--primary-dark); }
.footer-brand p { margin-top: 18px; font-size: 14px; line-height: 1.85; max-width: 340px; }
.footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 20px; font-weight: 700; }
.footer-col a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: #b6c2d9;
}
.footer-col a:hover { color: var(--accent); padding-left: 8px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  font-size: 13px;
  color: #7889a8;
  flex-wrap: wrap;
}
.footer-bottom a { color: #b6c2d9; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-hero h1 { font-size: 32px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
  .cta-stat strong { font-size: 26px; }
}

@media (max-width: 820px) {
  .header-inner { height: 64px; }
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    box-shadow: 0 20px 40px rgba(18, 60, 138, 0.12);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
    border-radius: 0 0 20px 20px;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { padding: 13px 18px; font-size: 16px; }
  .main-nav a.nav-cta { margin-left: 0; text-align: center; }
  .article-hero { padding: 60px 0 72px; }
  .article-hero h1 { font-size: 28px; }
  .article-card { padding: 32px; }
  .sidebar-cover { display: none; }
  .article-sidebar { position: static; margin-top: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .cta-box { padding: 40px 28px; }
  .cta-box h2 { font-size: 26px; }
  .cta-stats { gap: 28px; }
  .article-bottom-cta { padding: 24px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .section { padding: 56px 0; }
  .article-hero { padding: 48px 0 60px; }
  .article-hero h1 { font-size: 23px; }
  .article-card { padding: 22px 20px; border-radius: 18px; }
  .article-content { font-size: 15.5px; line-height: 1.85; }
  .article-content h2 { font-size: 21px; }
  .article-content h3 { font-size: 18px; }
  .article-content blockquote { padding: 14px 18px; }
  .section-head h2 { font-size: 25px; }
  .cta-box { padding: 32px 22px; border-radius: 20px; }
  .cta-box h2 { font-size: 22px; }
  .cta-stat strong { font-size: 22px; }
  .cta-stats { gap: 20px; }
  .faq-item summary { padding: 18px 20px; font-size: 15px; }
  .faq-answer { padding: 0 20px 22px; font-size: 14px; }
  .related-card-body { padding: 20px 20px 0; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-bottom-cta { flex-direction: column; text-align: center; }
  .bottom-cta-btns { justify-content: center; }
  .btn-primary, .btn-outline, .btn-light-outline { width: 100%; }
  .cta-buttons .btn-primary, .cta-buttons .btn-light-outline { width: 100%; }
}

/* ===== Focus accessibility ===== */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(217, 164, 65, 0.6);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-2 { margin-bottom: 20px; }