/* roulang page: index */
:root {
  --primary: #2E86A8;
  --primary-dark: #1B6B85;
  --primary-light: #E1F0F6;
  --accent: #F5A04C;
  --accent-light: #FEF0DF;
  --bg: #F5F8FA;
  --card-bg: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5EAF0;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 16px rgba(30, 64, 90, 0.06);
  --shadow-hover: 0 8px 28px rgba(30, 64, 90, 0.10);
  --shadow-lg: 0 12px 40px rgba(30, 64, 90, 0.12);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s ease; }
button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
:focus-visible { outline: 2px solid rgba(46, 134, 168, .5); outline-offset: 2px; }
.container-custom { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(229, 234, 240, .6);
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { background: rgba(255, 255, 255, .97); box-shadow: 0 2px 20px rgba(30, 64, 90, .08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 14px; letter-spacing: -.5px;
  box-shadow: 0 2px 8px rgba(46, 134, 168, .25);
}
.logo-name { font-size: 18px; font-weight: 700; color: var(--text); line-height: 1.2; }
.logo-sub { font-size: 10px; color: var(--text-secondary); letter-spacing: .5px; display: block; line-height: 1.3; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px; font-size: 14px; color: var(--text-secondary);
  border-radius: 8px; font-weight: 500; transition: all .2s ease;
  position: relative;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: ''; position: absolute; bottom: 0; left: 14px; right: 14px;
  height: 2px; background: var(--primary); border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.search-box {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg); border: 1px solid transparent;
  border-radius: 20px; height: 36px; padding: 0 14px;
  width: 160px; transition: all .25s ease;
}
.search-box i { font-size: 13px; color: var(--text-secondary); }
.search-box input { border: none; background: transparent; font-size: 13px; color: var(--text); width: 100%; }
.search-box input::placeholder { color: #9CA3AF; }
.search-box:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(46, 134, 168, .12); }
.login-link { font-size: 14px; color: var(--text-secondary); font-weight: 500; white-space: nowrap; }
.login-link:hover { color: var(--primary); }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary); color: #fff; font-size: 14px; font-weight: 500;
  padding: 10px 20px; border-radius: 8px; border: none; cursor: pointer;
  transition: all .25s ease; box-shadow: 0 2px 8px rgba(46, 134, 168, .25);
  text-align: center;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(46, 134, 168, .35); }
.btn-primary:active { transform: scale(.98); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-full { width: 100%; }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; color: var(--primary); font-size: 14px; font-weight: 500;
  padding: 10px 20px; border-radius: 8px; border: 1px solid var(--border); cursor: pointer;
  transition: all .25s ease; box-shadow: 0 2px 6px rgba(30, 64, 90, .04);
}
.btn-secondary:hover { background: var(--primary-light); border-color: var(--primary); }
.btn-secondary:active { transform: scale(.98); }
.mobile-toggle { display: none; background: none; border: none; font-size: 20px; color: var(--text); cursor: pointer; padding: 6px; }
.mobile-menu { display: none; background: #fff; border-top: 1px solid var(--border); padding: 16px 20px; flex-direction: column; gap: 4px; box-shadow: 0 10px 30px rgba(30, 64, 90, .08); }
.mobile-menu.open { display: flex; }
.mobile-link { padding: 10px 12px; font-size: 15px; color: var(--text); border-radius: 8px; font-weight: 500; }
.mobile-link:hover { background: var(--primary-light); color: var(--primary); }
.mobile-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.mobile-search { margin-top: 10px; display: flex; align-items: center; gap: 8px; background: var(--bg); border-radius: 10px; padding: 0 12px; height: 40px; }
.mobile-search input { border: none; background: transparent; font-size: 14px; width: 100%; }
.mobile-menu .btn-primary { margin-top: 12px; width: 100%; }

/* Hero */
.hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover; background-position: center;
  padding: 100px 0 90px;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(255,255,255,.95) 55%, rgba(255,255,255,.75));
}
.hero-inner { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.hero h1 {
  font-size: 38px; font-weight: 700; line-height: 1.3; letter-spacing: -.5px;
  color: var(--text); max-width: 640px;
  margin-bottom: 16px;
}
.hero h1 .highlight { color: var(--primary); }
.hero-sub {
  font-size: 16px; color: var(--text-secondary); max-width: 540px;
  line-height: 1.7; margin-bottom: 30px;
}
.hero-btns { display: flex; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-points { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-point {
  display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 16px; font-size: 13px;
  color: var(--text); box-shadow: var(--shadow);
  transition: all .25s ease;
}
.hero-point:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: rgba(46, 134, 168, .3); }
.hero-point i { color: var(--primary); font-size: 14px; }

/* Section */
.section { padding: 80px 0; }
.section-bg-white { background: #fff; }
.section-head { margin-bottom: 44px; max-width: 720px; }
.section-head h2 { font-size: 28px; font-weight: 700; letter-spacing: -.3px; color: var(--text); margin-bottom: 8px; }
.section-head p { font-size: 15px; color: var(--text-secondary); }
.section-head-flex { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; max-width: none; }
.text-link { font-size: 14px; color: var(--primary); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.text-link:hover { color: var(--primary-dark); }
.text-link i { font-size: 12px; transition: transform .2s ease; }
.text-link:hover i { transform: translateX(3px); }

/* Solution Cards */
.solution-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; }
.solution-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: all .25s ease;
  display: flex; flex-direction: column;
}
.solution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(46, 134, 168, .3);
}
.solution-card-left { grid-row: span 2; }
.sol-img { height: 200px; overflow: hidden; background: var(--primary-light); }
.solution-card-left .sol-img { height: 260px; }
.sol-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.solution-card:hover .sol-img img { transform: scale(1.03); }
.sol-body { padding: 28px; position: relative; flex: 1; display: flex; flex-direction: column; }
.sol-num {
  position: absolute; top: 20px; right: 24px;
  font-size: 42px; font-weight: 800; color: var(--primary-light);
  line-height: 1; z-index: 0;
}
.sol-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: var(--text); position: relative; z-index: 1; }
.sol-body > p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; position: relative; z-index: 1; }
.sol-tags { display: flex; gap: 8px; margin-top: auto; padding-top: 18px; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center;
  background: var(--primary-light); color: var(--primary-dark);
  font-size: 12px; font-weight: 500; padding: 4px 14px;
  border-radius: 999px; line-height: 1.5;
}

/* Stats */
.stats-section { background: var(--primary-light); padding: 80px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-item { text-align: center; padding: 20px 10px; }
.stat-num { font-size: 42px; font-weight: 800; color: var(--primary); letter-spacing: -1px; line-height: 1.2; }
.stat-num span { font-size: 18px; font-weight: 600; color: var(--accent); }
.stat-item p { font-size: 14px; color: var(--text-secondary); margin-top: 8px; }

/* News List */
.news-list { display: flex; flex-direction: column; gap: 14px; }
.news-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px;
  box-shadow: var(--shadow); transition: all .25s ease;
}
.news-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: rgba(46, 134, 168, .3); }
.news-cat {
  flex-shrink: 0; background: var(--primary-light); color: var(--primary-dark);
  font-size: 12px; font-weight: 500; padding: 4px 14px; border-radius: 999px;
}
.news-content { flex: 1; min-width: 0; }
.news-content h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color .2s ease; }
.news-item:hover .news-content h3 { color: var(--primary); }
.news-content p { font-size: 13px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-time { font-size: 13px; color: var(--text-secondary); white-space: nowrap; flex-shrink: 0; }
.news-arrow { color: #CBD5E1; font-size: 14px; flex-shrink: 0; transition: all .2s ease; }
.news-item:hover .news-arrow { color: var(--primary); transform: translateX(3px); }
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: #fff; border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 60px 20px; text-align: center; color: var(--text-secondary);
}
.empty-state i { font-size: 36px; color: #CBD5E1; margin-bottom: 14px; }
.empty-state p { font-size: 15px; }

/* Form */
.form-section { padding: 80px 0; }
.form-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
  background: var(--primary-light);
  border-radius: 24px; padding: 60px; position: relative;
  overflow: hidden;
}
.form-wrap::before {
  content: ''; position: absolute; top: -40px; right: -40px;
  width: 200px; height: 200px; border-radius: 50%;
  background: rgba(46, 134, 168, .08);
}
.form-info h2 { font-size: 26px; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.form-info p { font-size: 15px; color: var(--text-secondary); margin-bottom: 24px; }
.form-info ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.form-info ul li { font-size: 14px; color: var(--text); display: flex; align-items: center; gap: 10px; }
.form-info ul li i { color: var(--primary); }
.form-card {
  background: #fff; border-radius: var(--radius-lg);
  padding: 36px; box-shadow: var(--shadow-lg);
  border: 1px solid rgba(229, 234, 240, .8); position: relative; z-index: 2;
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.form-group input, .form-group select {
  width: 100%; height: 42px; border: 1px solid var(--border);
  border-radius: 8px; padding: 0 14px; font-size: 14px;
  color: var(--text); background: #fff; transition: all .25s ease;
}
.form-group input:focus, .form-group select:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(46, 134, 168, .12);
}
.privacy-note {
  font-size: 12px; color: var(--text-secondary); margin-top: 16px;
  display: flex; align-items: flex-start; gap: 6px; line-height: 1.5;
}
.privacy-note i { color: var(--primary); margin-top: 2px; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all .25s ease; }
.faq-item:hover { border-color: rgba(46, 134, 168, .3); box-shadow: var(--shadow); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; cursor: pointer; font-size: 15px; font-weight: 500;
  color: var(--text); user-select: none; transition: all .2s ease;
}
.faq-question:hover { color: var(--primary); }
.faq-question i { font-size: 16px; color: var(--text-secondary); transition: transform .3s ease; }
.faq-item.active .faq-question { color: var(--primary); }
.faq-item.active .faq-question i { transform: rotate(45deg); color: var(--primary); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
  font-size: 14px; color: var(--text-secondary); line-height: 1.7;
  padding: 0 24px;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* CTA */
.cta-section {
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  padding: 80px 0; text-align: center; position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; top: -60px; left: -60px;
  width: 260px; height: 260px; border-radius: 50%;
  background: rgba(255,255,255,.05);
}
.cta-section::after {
  content: ''; position: absolute; bottom: -80px; right: -40px;
  width: 300px; height: 300px; border-radius: 50%;
  background: rgba(255,255,255,.05);
}
.cta-inner { position: relative; z-index: 2; }
.cta-inner h2 { font-size: 30px; font-weight: 700; color: #fff; letter-spacing: -.3px; margin-bottom: 12px; }
.cta-inner p { font-size: 16px; color: rgba(255,255,255,.85); margin-bottom: 30px; }
.btn-white {
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; color: var(--primary-dark); font-size: 15px; font-weight: 600;
  padding: 12px 32px; border-radius: 8px; cursor: pointer; border: none;
  transition: all .25s ease; box-shadow: 0 4px 16px rgba(0,0,0,.12);
}
.btn-white:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.btn-white:active { transform: scale(.98); }

/* Footer */
.site-footer { background: #fff; border-top: 3px solid var(--primary); padding-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .footer-logo { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.social-icons { display: flex; gap: 10px; }
.social-icons span {
  width: 36px; height: 36px; border-radius: 50%; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); cursor: pointer; transition: all .2s ease;
}
.social-icons span:hover { background: var(--primary-light); color: var(--primary); }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 16px; }
.footer-col a, .footer-col p {
  display: block; font-size: 14px; color: var(--text-secondary);
  margin-bottom: 10px; line-height: 1.6;
}
.footer-col a:hover { color: var(--primary); }
.footer-col p i { width: 18px; color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--text-secondary);
  flex-wrap: wrap; gap: 10px;
}
.footer-bottom .secure-icons { display: flex; gap: 14px; font-size: 13px; }

/* Responsive */
@media (max-width: 1024px) {
  .main-nav { gap: 2px; }
  .nav-link { padding: 8px 10px; font-size: 13px; }
  .search-box { width: 120px; }
  .header-actions { gap: 10px; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .solution-card-left { grid-row: span 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .header-inner { height: 60px; }
  .main-nav, .header-actions .search-box, .header-actions .login-link { display: none; }
  .header-actions .btn-sm { display: none; }
  .mobile-toggle { display: block; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .hero-points { flex-direction: column; gap: 10px; }
  .hero-point { width: 100%; }
  .section { padding: 48px 0; }
  .section-head h2 { font-size: 24px; }
  .solution-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-num { font-size: 32px; }
  .form-wrap { grid-template-columns: 1fr; padding: 32px 24px; gap: 28px; }
  .form-card { padding: 24px; }
  .news-item { flex-wrap: wrap; padding: 16px; gap: 10px; }
  .news-cat { order: 1; }
  .news-content { order: 3; flex-basis: 100%; }
  .news-time { order: 2; margin-left: auto; }
  .news-arrow { display: none; }
  .cta-section { padding: 56px 0; }
  .cta-inner h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-head-flex { flex-direction: column; align-items: flex-start; gap: 8px; margin-bottom: 24px; }
}
@media (max-width: 520px) {
  .container-custom { padding: 0 16px; }
  .hero-btns { flex-direction: column; width: 100%; }
  .hero-btns .btn-primary, .hero-btns .btn-secondary { width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stats-section { padding: 48px 0; }
}

/* roulang page: category1 */
:root {
  --primary: #2E86A8;
  --primary-dark: #1B6B85;
  --primary-light: #E1F0F6;
  --accent: #F5A04C;
  --accent-light: #FEF0DF;
  --bg: #F5F8FA;
  --card: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5EAF0;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 4px 16px rgba(30,64,90,0.06);
  --shadow-lg: 0 12px 40px rgba(30,64,90,0.12);
  --transition: 200ms ease;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  padding-top: 64px;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.text-primary { color: var(--primary); }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 4px 20px rgba(30,64,90,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 30px; height: 30px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.logo-sub {
  font-size: 10px;
  color: var(--text-secondary);
  margin-left: 4px;
  font-weight: 400;
}
.main-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-link {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 2px;
  position: relative;
  transition: color var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-radius: 16px;
  height: 32px;
  padding: 0 12px;
  gap: 6px;
  border: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46,134,168,0.15);
}
.search-box i { font-size: 13px; color: var(--text-secondary); }
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 13px;
  width: 140px;
  color: var(--text);
}
.login-link {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color var(--transition);
}
.login-link:hover { color: var(--primary); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(46,134,168,0.25);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
}
.btn-small { padding: 8px 18px; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.btn-secondary:active { transform: scale(0.98); }
.btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--primary-dark);
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(27,107,133,0.25);
}
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.6);
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 100px 0 80px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.88);
}
.hero-inner {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: #b26a1f;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-badge i { font-size: 13px; }
.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text);
}
.page-hero h1 .text-primary { color: var(--primary); }
.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 28px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.hero-points {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}
.hero-point {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 18px;
  box-shadow: var(--shadow-sm);
}
.hero-point i { color: var(--primary); }

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-alt { background: #fff; }
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Entry Cards ===== */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.entry-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.entry-card:hover {
  box-shadow: 0 8px 28px rgba(30,64,90,0.10);
  transform: translateY(-4px);
  border-color: rgba(46,134,168,0.3);
}
.entry-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
}
.entry-card-body {
  padding: 24px;
  position: relative;
}
.card-num {
  position: absolute;
  top: -14px;
  right: 20px;
  font-size: 42px;
  font-weight: 800;
  color: rgba(46,134,168,0.18);
  line-height: 1;
}
.entry-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.entry-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.text-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition), gap var(--transition);
}
.text-link:hover {
  color: var(--primary-dark);
  gap: 10px;
}

/* ===== Scenario ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.scenario-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}
.scenario-text > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
}
.scenario-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.scenario-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.scenario-list li > i {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}
.scenario-list li strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: block;
  margin-bottom: 4px;
}
.scenario-list li p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.scenario-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

/* ===== Stats ===== */
.stats-section {
  background: var(--primary-light);
  padding: 70px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-num span {
  font-size: 26px;
  color: var(--accent);
}
.stat-item p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.step-card:hover {
  box-shadow: 0 8px 28px rgba(30,64,90,0.10);
  transform: translateY(-4px);
}
.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin: 0 auto 18px;
}
.step-order {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 8px;
}
.step-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.active {
  border-color: rgba(46,134,168,0.35);
  box-shadow: 0 6px 20px rgba(30,64,90,0.08);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  gap: 16px;
}
.faq-question i {
  color: var(--primary);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}
.faq-answer-inner {
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 0;
}
.cta-inner {
  text-align: center;
  color: #fff;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: #F0F3F6;
  border-top: 3px solid var(--primary);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.social-icons {
  display: flex;
  gap: 12px;
}
.social-icons span {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.social-icons span:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary); }
.footer-col p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.footer-col p i {
  margin-right: 8px;
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p {
  font-size: 12px;
  color: #9ca3af;
}
.secure-icons {
  display: flex;
  gap: 16px;
}
.secure-icons span i {
  margin-right: 4px;
  color: var(--primary);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav { gap: 16px; }
  .search-box { display: none; }
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 20px;
    gap: 16px;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 300ms ease, opacity 300ms ease;
    box-shadow: 0 8px 30px rgba(30,64,90,0.10);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav-link.active::after { display: none; }
  .nav-link.active {
    background: var(--primary-light);
    border-radius: 8px;
    padding: 8px 14px;
  }
  .header-actions { gap: 10px; }
  .login-link { display: none; }
  .btn-small { padding: 8px 14px; }
  .page-hero { padding: 70px 0 60px; }
  .page-hero h1 { font-size: 28px; }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .entry-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-points { flex-direction: column; align-items: center; }
  .cta-actions { flex-direction: column; }
  .btn-white, .btn-outline-white { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .logo-sub { display: none; }
  .search-box { display: none; }
  .container-custom { padding: 0 16px; }
  .hero-points { gap: 14px; }
  .stats-grid { gap: 20px; }
  .stat-num { font-size: 34px; }
  .section-head h2 { font-size: 24px; }
}

/* roulang page: article */
:root {
  --primary: #2E86A8;
  --primary-dark: #1B6B85;
  --primary-light: #E1F0F6;
  --accent: #F5A04C;
  --accent-light: #FEF0DF;
  --bg: #F5F8FA;
  --card: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5EAF0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 16px rgba(30, 64, 90, 0.06);
  --shadow-lg: 0 12px 40px rgba(30, 64, 90, 0.12);
  --transition: 0.2s ease;
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

button, input, select, textarea {
  font: inherit;
}

button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), #3BA6C4);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(46, 134, 168, 0.25);
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.brand-sub {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 2px;
  position: relative;
  transition: color var(--transition);
}

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

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 6px 12px;
  height: 36px;
  width: 180px;
  transition: all var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(46, 134, 168, 0.15);
}

.search-box i {
  color: var(--text-secondary);
  font-size: 13px;
  margin-right: 8px;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 13px;
  color: var(--text);
}

.login-link {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.login-link:hover {
  color: var(--primary);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(46, 134, 168, 0.2);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(46, 134, 168, 0.3);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
}

.breadcrumb-area {
  background: var(--primary-light);
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

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

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

.breadcrumb .sep {
  opacity: 0.5;
  font-size: 11px;
}

.article-wrap {
  padding: 48px 0 64px;
}

.article-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 40px 48px;
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.article-header {
  margin-bottom: 28px;
}

.article-header h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  color: var(--text);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.meta-row i {
  margin-right: 5px;
  color: var(--primary);
}

.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.article-body p {
  margin-bottom: 1.3em;
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 2em 0 0.8em;
  color: var(--text);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 1.8em 0 0.6em;
  color: var(--text);
}

.article-body img {
  border-radius: 12px;
  margin: 1.5em 0;
  box-shadow: var(--shadow);
}

.article-body blockquote {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 1.5em 0;
  color: var(--text-secondary);
}

.article-body ul,
.article-body ol {
  margin: 1em 0 1.5em 1.6em;
}

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

.article-body a {
  color: var(--primary);
  text-decoration: underline;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
}

.article-body table th,
.article-body table td {
  border: 1px solid var(--border);
  padding: 10px;
  text-align: left;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.tag {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 999px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.post-nav a {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  transition: all var(--transition);
}

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

.article-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.article-empty i {
  font-size: 42px;
  color: var(--primary);
  margin-bottom: 14px;
  opacity: 0.5;
}

.article-empty p {
  font-size: 15px;
  margin-bottom: 18px;
}

.related-section {
  padding: 0 0 64px;
}

.related-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.related-head h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
}

.related-more {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
}

.related-more:hover {
  color: var(--primary-dark);
}

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

.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  display: block;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(46, 134, 168, 0.35);
}

.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.related-content {
  padding: 20px 22px;
}

.pill {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

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

.related-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.related-link {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
}

.cta-band {
  background: linear-gradient(120deg, var(--primary), #3BA6C4);
  padding: 60px 0;
  color: #fff;
  text-align: center;
}

.cta-band h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 10px;
}

.cta-band p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 24px;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.site-footer {
  background: #F0F3F6;
  border-top: 3px solid var(--primary);
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 32px;
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.social-icons {
  display: flex;
  gap: 10px;
}

.social-icons span {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.social-icons span:hover {
  background: var(--primary);
  color: #fff;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.footer-col a,
.footer-col p {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.secure-icons {
  display: flex;
  gap: 14px;
}

@media (max-width: 1023px) {
  .main-nav {
    gap: 14px;
  }
  .search-box {
    width: 140px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .menu-toggle {
    display: block;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 20px 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    display: none;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
  }
  .nav-link.active::after {
    display: none;
  }
  .nav-link.active {
    background: var(--primary-light);
    border-radius: 8px;
    padding: 12px 14px;
  }
  .header-actions {
    display: none;
  }
  .header-actions.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: auto;
    left: 16px;
    right: 16px;
    bottom: 16px;
    background: #fff;
    padding: 16px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  .header-actions.open .search-box {
    width: 100%;
  }
  .article-wrap {
    padding: 28px 0 48px;
  }
  .article-card {
    padding: 28px 20px;
  }
  .article-header h1 {
    font-size: 26px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-band {
    padding: 44px 0;
  }
  .cta-band h2 {
    font-size: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .container-custom {
    padding: 0 16px;
  }
  .related-card img {
    height: 140px;
  }
}

/* roulang page: category2 */
:root {
            --primary: #2E86A8;
            --primary-dark: #1B6B85;
            --primary-light: #E1F0F6;
            --accent: #F5A04C;
            --accent-light: #FEF0DF;
            --bg: #F5F8FA;
            --card: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --border: #E5EAF0;
            --radius: 12px;
            --radius-lg: 16px;
            --shadow: 0 4px 16px rgba(30, 64, 90, 0.06);
            --shadow-hover: 0 8px 28px rgba(30, 64, 90, 0.10);
            --shadow-card: 0 12px 40px rgba(30, 64, 90, 0.12);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", 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-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(229, 234, 240, 0.7);
            transition: box-shadow .25s ease, background .25s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 20px rgba(30, 64, 90, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            height: 64px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary) 0%, #3BA3C4 100%);
            border-radius: 9px;
            color: #fff;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: -0.5px;
            box-shadow: 0 2px 8px rgba(46, 134, 168, 0.25);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text strong {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
        }

        .brand-text small {
            font-size: 10.5px;
            color: var(--text-secondary);
            letter-spacing: 0.6px;
            margin-top: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 999px;
            transition: color .2s ease, background .2s ease;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            height: 34px;
            padding: 0 12px;
            width: 170px;
            transition: border-color .2s ease, box-shadow .2s ease;
        }

        .search-box i {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 13px;
            width: 100%;
            color: var(--text);
        }

        .search-box input::placeholder {
            color: var(--text-secondary);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 134, 168, 0.15);
        }

        .btn-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color .2s ease;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border: none;
            border-radius: 8px;
            padding: 9px 18px;
            cursor: pointer;
            transition: background .2s ease, transform .15s ease, box-shadow .2s ease;
            box-shadow: 0 2px 8px rgba(46, 134, 168, 0.20);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(46, 134, 168, 0.28);
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 9px 18px;
            cursor: pointer;
            transition: background .2s ease, border-color .2s ease, transform .15s ease, box-shadow .2s ease;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(46, 134, 168, 0.12);
        }

        .btn-outline:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--primary-dark);
            font-size: 15px;
            font-weight: 700;
            border: none;
            border-radius: 10px;
            padding: 12px 28px;
            cursor: pointer;
            transition: transform .15s ease, box-shadow .2s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
        }

        .btn-white:active {
            transform: translateY(0) scale(0.98);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text);
            cursor: pointer;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: background .2s ease;
        }

        .mobile-toggle:hover {
            background: var(--primary-light);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 16px 20px 20px;
            box-shadow: 0 12px 24px rgba(30, 64, 90, 0.08);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 14px;
            border-radius: 10px;
            font-size: 15px;
        }

        .mobile-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 0 14px;
            height: 42px;
            margin-top: 14px;
        }

        .mobile-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            width: 100%;
        }

        .hero-section {
            position: relative;
            padding: 90px 0 100px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0.78) 55%, rgba(225, 240, 246, 0.72) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(46, 134, 168, 0.15);
        }

        .hero-content h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text);
            margin: 20px 0 16px;
        }

        .hero-content h1 span {
            color: var(--primary);
        }

        .hero-content p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 620px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 16px;
            font-size: 13.5px;
            color: var(--text);
            font-weight: 500;
            box-shadow: 0 2px 8px rgba(30, 64, 90, 0.04);
        }

        .hero-trust i {
            color: var(--primary);
        }

        .section-block {
            padding: 80px 0;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.4px;
            margin: 16px 0 12px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
        }

        .section-head .badge-pill {
            margin-bottom: 4px;
        }

        .info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .info-card {
            position: relative;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
            overflow: hidden;
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 134, 168, 0.3);
        }

        .info-card .info-num {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 32px;
            font-weight: 800;
            color: rgba(46, 134, 168, 0.10);
            line-height: 1;
        }

        .info-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            margin-bottom: 16px;
        }

        .info-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .info-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.65;
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-chip {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12.5px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
        }

        .value-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .value-text h2 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.4px;
            margin: 14px 0 14px;
        }

        .value-text > p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 24px;
        }

        .value-list {
            list-style: none;
            margin-bottom: 28px;
        }

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

        .value-list li i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 14px;
        }

        .value-image {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .value-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .value-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(30, 64, 90, 0.2));
            pointer-events: none;
        }

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

        .hot-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
        }

        .hot-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 134, 168, 0.3);
        }

        .hot-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .hot-card-body {
            padding: 20px 22px 24px;
        }

        .hot-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .hot-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .hot-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12.5px;
            color: var(--text-secondary);
        }

        .hot-card-meta a {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }

        .hot-card-meta a:hover {
            gap: 8px;
        }

        .process-section {
            background: var(--primary-light);
            padding: 80px 0;
        }

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

        .process-item {
            text-align: center;
            padding: 24px 16px;
        }

        .process-step {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(46, 134, 168, 0.25);
        }

        .process-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .faq-section {
            padding: 80px 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow .2s ease, border-color .2s ease;
        }

        .faq-item:hover {
            border-color: rgba(46, 134, 168, 0.25);
            box-shadow: var(--shadow-hover);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            list-style: none;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

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

        .faq-item summary .faq-arrow {
            font-size: 14px;
            color: var(--text-secondary);
            transition: transform .25s ease, color .25s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-arrow {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cta-section {
            position: relative;
            padding: 72px 0;
            overflow: hidden;
        }

        .cta-bg {
            position: absolute;
            inset: 0;
            background: var(--primary-dark);
            z-index: 0;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            z-index: 1;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            padding: 20px 0;
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -0.4px;
            margin-bottom: 12px;
        }

        .cta-inner p {
            font-size: 15.5px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .site-footer {
            background: #F0F3F6;
            border-top: 3px solid var(--primary);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 260px;
        }

        .social-icons {
            display: flex;
            gap: 10px;
        }

        .social-icons span {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: #fff;
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all .2s ease;
        }

        .social-icons span:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }

        .footer-col a,
        .footer-col p {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.1;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-col p i {
            margin-right: 6px;
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom p {
            font-size: 12.5px;
            color: var(--text-secondary);
        }

        .footer-bottom .secure-icons {
            display: flex;
            gap: 18px;
        }

        .footer-bottom .secure-icons span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            color: var(--text-secondary);
        }

        .footer-bottom .secure-icons i {
            color: var(--primary);
        }

        @media (max-width: 1023px) {
            .main-nav .nav-link {
                padding: 8px 10px;
                font-size: 13px;
            }
            .search-box {
                width: 130px;
            }
            .header-actions {
                gap: 8px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hot-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 767px) {
            .header-inner {
                gap: 10px;
            }
            .main-nav {
                display: none;
            }
            .header-actions {
                display: none;
            }
            .mobile-toggle {
                display: inline-flex;
                margin-left: auto;
            }
            .hero-section {
                padding: 56px 0 60px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-content p {
                font-size: 14.5px;
            }
            .hero-trust span {
                padding: 6px 12px;
                font-size: 12.5px;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .info-grid {
                grid-template-columns: 1fr;
            }
            .value-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .value-image img {
                height: 260px;
            }
            .hot-list {
                grid-template-columns: 1fr;
            }
            .process-section {
                padding: 48px 0;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .faq-section {
                padding: 48px 0;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
            }
            .hero-buttons {
                flex-direction: column;
            }
        }

        @media (max-width: 480px) {
            .hero-buttons {
                flex-direction: column;
            }
            .hero-trust {
                flex-direction: column;
            }
            .hero-trust span {
                justify-content: flex-start;
            }
        }

/* roulang page: category3 */
:root {
    --primary: #2E86A8;
    --primary-dark: #1B6B85;
    --primary-light: #E1F0F6;
    --accent: #F5A04C;
    --accent-light: #FEF0DF;
    --bg: #F5F8FA;
    --card: #FFFFFF;
    --text: #1F2937;
    --text-secondary: #6B7280;
    --border: #E5EAF0;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow: 0 4px 16px rgba(30,64,90,.06);
    --shadow-lg: 0 12px 40px rgba(30,64,90,.12);
    --max-w: 1200px;
    --transition: 200ms ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
  }

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

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

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

  .container-custom {
    max-width: var(--max-w);
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  .section {
    padding: 80px 0;
  }

  @media (max-width: 768px) {
    .section {
      padding: 48px 0;
    }
  }

  .section-light {
    background: #fff;
  }

  .section-head {
    max-width: 640px;
    margin-bottom: 48px;
  }

  .section-head h2 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
    margin-bottom: 12px;
  }

  .section-head p {
    font-size: 15px;
    color: var(--text-secondary);
  }

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

  /* ===== Header ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 64px;
    background: rgba(255, 255, 255, .7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(229, 234, 240, .6);
    transition: background var(--transition), box-shadow var(--transition);
  }

  .site-header.scrolled {
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 4px 24px rgba(30, 64, 90, .08);
  }

  .header-inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-size: 14px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: -1px;
  }

  .brand-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
  }

  .brand-sub {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--primary-light);
    padding: 2px 8px;
    border-radius: 999px;
    line-height: 1.6;
    letter-spacing: .5px;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
  }

  .nav-link {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 999px;
    transition: color var(--transition), background var(--transition);
  }

  .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
  }

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

  .header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
  }

  .search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg);
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0 14px;
    height: 36px;
    width: 180px;
    transition: border-color var(--transition), background var(--transition);
  }

  .search-box i {
    font-size: 13px;
    color: var(--text-secondary);
  }

  .search-box input {
    border: none;
    outline: none;
    background: transparent;
    font-size: 13px;
    width: 100%;
    color: var(--text);
  }

  .search-box:focus-within {
    border-color: var(--primary);
    background: #fff;
  }

  .login-link {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition);
  }

  .login-link:hover {
    color: var(--primary);
  }

  .hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
  }

  .hamburger span {
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 4px;
    transition: transform var(--transition), opacity var(--transition);
  }

  .hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .mobile-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 20px 24px;
    flex-direction: column;
    gap: 8px;
    box-shadow: 0 12px 24px rgba(30, 64, 90, .08);
    z-index: 999;
  }

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

  .mobile-nav .search-box {
    width: 100%;
    margin-bottom: 8px;
  }

  .mobile-nav-link {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    transition: background var(--transition);
  }

  .mobile-nav-link:hover,
  .mobile-nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
  }

  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 24px;
    height: 44px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
  }

  .btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(46, 134, 168, .4);
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(46, 134, 168, .25);
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(27, 107, 133, .3);
  }

  .btn-primary:active {
    transform: scale(.98);
  }

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

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

  .btn-sm {
    height: 36px;
    padding: 0 18px;
    font-size: 14px;
  }

  .btn-lg {
    height: 52px;
    padding: 0 36px;
    font-size: 16px;
  }

  .btn-block {
    width: 100%;
  }

  /* ===== Badge ===== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    background: var(--primary-light);
    color: var(--primary);
  }

  .badge-accent {
    background: var(--accent-light);
    color: #C2700F;
  }

  .tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    background: var(--primary-light);
    color: var(--primary);
    margin: 4px 4px 0 0;
  }

  /* ===== Hero ===== */
  .category-hero {
    position: relative;
    padding: 160px 0 96px;
    background: linear-gradient(135deg, #E1F0F6 0%, #F5F8FA 100%);
    overflow: hidden;
  }

  .category-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: .18;
    z-index: 0;
  }

  .category-hero-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
  }

  .category-hero .badge {
    margin-bottom: 20px;
  }

  .category-hero h1 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--text);
    margin-bottom: 16px;
  }

  .category-hero p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 32px;
  }

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

  /* ===== Service Cards ===== */
  .service-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px 32px;
  }

  .service-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
    display: flex;
    flex-direction: column;
  }

  .service-card:hover {
    box-shadow: 0 8px 28px rgba(30, 64, 90, .1);
    border-color: rgba(46, 134, 168, .3);
    transform: translateY(-4px);
  }

  .service-card-img {
    height: 180px;
    width: 100%;
    object-fit: cover;
    background: var(--primary-light);
  }

  .service-card-body {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .service-card-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
  }

  .service-card-body p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 16px;
    flex: 1;
  }

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

  .step-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: left;
    box-shadow: var(--shadow);
    position: relative;
    transition: box-shadow var(--transition), transform var(--transition);
  }

  .step-item:hover {
    box-shadow: 0 8px 28px rgba(30, 64, 90, .1);
    transform: translateY(-4px);
  }

  .step-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 16px;
    opacity: .9;
  }

  .step-item h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
  }

  .step-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* ===== Stats ===== */
  .stats-section {
    background: var(--primary-light);
    padding: 72px 0;
  }

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

  .stat-item {
    text-align: center;
    padding: 24px 16px;
  }

  .stat-num {
    font-size: 44px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .stat-item p {
    font-size: 14px;
    color: var(--text-secondary);
  }

  /* ===== FAQ ===== */
  .faq-grid {
    max-width: 780px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    margin-bottom: 16px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
  }

  .faq-item.active {
    border-color: rgba(46, 134, 168, .3);
    box-shadow: var(--shadow);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    transition: background var(--transition);
  }

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

  .faq-question .icon {
    font-size: 18px;
    color: var(--primary);
    flex-shrink: 0;
    transition: transform var(--transition);
  }

  .faq-item.active .faq-question .icon {
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    padding: 0 24px;
  }

  .faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
  }

  /* ===== CTA + Form ===== */
  .cta-section {
    padding: 80px 0 100px;
  }

  .cta-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
  }

  .cta-left {
    padding: 56px 48px;
    background: linear-gradient(120deg, var(--primary-light), #fff);
  }

  .cta-left h2 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
  }

  .cta-left p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
  }

  .cta-trust {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .cta-trust li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text);
    list-style: none;
  }

  .cta-trust i {
    color: var(--primary);
    width: 20px;
  }

  .cta-form {
    padding: 56px 48px;
    background: #fff;
  }

  .form-group {
    margin-bottom: 20px;
  }

  .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
  }

  .form-input,
  .form-select {
    width: 100%;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 14px;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
  }

  .form-input:focus,
  .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 134, 168, .2);
  }

  .privacy-note {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .privacy-note i {
    color: var(--primary);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #fff;
    border-top: 3px solid var(--primary);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding: 64px 0 48px;
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 16px 0;
    max-width: 280px;
  }

  .footer-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
  }

  .social-icons {
    display: flex;
    gap: 12px;
  }

  .social-icons span {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
  }

  .social-icons span:hover {
    background: var(--primary-light);
    color: var(--primary);
  }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
  }

  .footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 4px 0;
    transition: color var(--transition);
  }

  .footer-col a:hover {
    color: var(--primary);
  }

  .footer-col p {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 4px 0;
  }

  .footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12px;
    color: var(--text-secondary);
  }

  .secure-icons {
    display: flex;
    gap: 16px;
  }

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

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .main-nav {
      gap: 4px;
    }

    .nav-link {
      padding: 8px 12px;
      font-size: 13px;
    }

    .search-box {
      width: 140px;
    }

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

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

  @media (max-width: 768px) {
    .main-nav,
    .header-actions .search-box,
    .header-actions .login-link,
    .header-actions .btn {
      display: none;
    }

    .hamburger {
      display: flex;
    }

    .header-actions {
      gap: 8px;
    }

    .category-hero {
      padding: 120px 0 72px;
    }

    .category-hero h1 {
      font-size: 28px;
    }

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

    .cta-card {
      grid-template-columns: 1fr;
    }

    .cta-left,
    .cta-form {
      padding: 40px 28px;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

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

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

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

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

    .stat-num {
      font-size: 36px;
    }

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

    .hero-actions {
      flex-direction: column;
      width: 100%;
    }

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

    .btn-lg {
      height: 48px;
    }
  }