/* roulang page: index */
:root {
  --bg-primary: #0A0F1E;
  --bg-secondary: #10182E;
  --bg-card: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.10);
  --accent: #00C2FF;
  --accent-hover: #33D1FF;
  --accent-gradient: linear-gradient(135deg, #00C2FF, #7B61FF);
  --gold: #F5A623;
  --success: #00E0A8;
  --text-primary: #EAF2FF;
  --text-secondary: #A6B7D6;
  --text-muted: #64789B;
  --error: #FF5D5D;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 28px rgba(0,0,0,0.35);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.50), 0 0 0 1px rgba(0,194,255,0.15);
  --shadow-accent: 0 0 20px rgba(0,194,255,0.35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Inter", "Helvetica Neue", Arial, sans-serif;
  --space-section: 88px;
  --space-section-md: 64px;
  --space-section-sm: 48px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.75;
  font-weight: 400;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent-hover); }
button, input { font-family: inherit; }
.container { max-width: 1280px; padding-left: 24px; padding-right: 24px; margin: 0 auto; }

/* ===== Custom Bootstrap overrides ===== */
.btn { border-radius: var(--radius-md); font-weight: 600; transition: all 0.25s ease; }
.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #071426;
  box-shadow: var(--shadow-accent);
  padding: 14px 28px;
  font-size: 15px;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #071426;
  box-shadow: 0 0 30px rgba(0,194,255,0.5);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0px); filter: brightness(0.95); }
.btn-outline-primary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 14px 28px;
  font-size: 15px;
}
.btn-outline-primary:hover {
  background: rgba(0,194,255,0.12);
  border-color: var(--accent-hover);
  color: var(--accent-hover);
}
.btn-outline-primary:active { transform: translateY(0px); }
.btn:focus, .btn:focus-visible, .form-control:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0,194,255,0.35);
}
.form-control {
  background-color: transparent;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 12px 16px;
  transition: all 0.25s ease;
}
.form-control:focus {
  background-color: transparent;
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 4px rgba(0,194,255,0.15);
}
.form-control::placeholder { color: var(--text-muted); }
.accordion-button::after { filter: invert(0.8); }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(10,15,30,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  z-index: 1000;
}
.navbar {
  height: 64px;
  padding: 0 24px;
  background: transparent !important;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary) !important;
  letter-spacing: -0.3px;
}
.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: 10px;
  font-size: 18px;
  color: #0A0F1E;
  flex-shrink: 0;
}
.navbar-nav { margin-left: 24px; gap: 4px; }
.navbar-nav .nav-link {
  color: var(--text-secondary) !important;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px !important;
  border-radius: 8px;
  transition: all 0.2s ease;
}
.navbar-nav .nav-link:hover {
  color: var(--text-primary) !important;
  background: rgba(255,255,255,0.06);
}
.navbar-nav .nav-link.active {
  color: var(--accent) !important;
  background: rgba(0,194,255,0.12);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}
.header-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: all 0.2s ease;
}
.header-search:hover { color: var(--accent); border-color: rgba(0,194,255,0.4); }
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--accent) !important;
  color: #071426 !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  border: none;
  box-shadow: var(--shadow-accent);
  transition: all 0.25s ease;
}
.header-cta:hover { background: var(--accent-hover) !important; transform: translateY(-2px); box-shadow: 0 0 28px rgba(0,194,255,0.5); }
.navbar-toggler {
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(0,194,255,0.3); }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 120px 0 88px;
  min-height: 640px;
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  overflow: hidden;
}
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.hero-title .gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 32px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.hero-trust {
  display: flex;
  gap: 24px;
  color: var(--text-muted);
  font-size: 13px;
  align-items: center;
}
.hero-trust span { display: flex; align-items: center; gap: 6px; }
.hero-visual {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.hero-visual img {
  width: 100%;
  height: auto;
  min-height: 400px;
  object-fit: cover;
  display: block;
}
.hero-decor {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}
.hero-decor-1 { width: 400px; height: 400px; background: rgba(0,194,255,0.4); top: -100px; right: -50px; }
.hero-decor-2 { width: 300px; height: 300px; background: rgba(123,97,255,0.3); bottom: -100px; left: 10%; }
.glass-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.10);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.hero-floating-card {
  position: absolute;
  padding: 14px 18px;
  border-radius: 16px;
  background: rgba(10,15,30,0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 3;
}
.hero-floating-card .label { font-size: 12px; color: var(--text-muted); }
.hero-floating-card .value { font-size: 22px; font-weight: 700; color: var(--accent); }
.hero-floating-card-1 { top: 30px; right: -20px; }
.hero-floating-card-2 { bottom: 40px; left: -20px; }

/* ===== Section styles ===== */
.section { padding: var(--space-section) 0; }
.section-sm { padding: 48px 0; }
.section-title-wrap { margin-bottom: 48px; position: relative; }
.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: middle;
  box-shadow: 0 0 12px rgba(0,194,255,0.6);
}
.section-subtitle { color: var(--text-secondary); font-size: 16px; max-width: 600px; }
.section-head-row { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }
.section-head-row .section-title { margin-bottom: 0; }
.view-all-link { color: var(--accent); font-size: 14px; font-weight: 500; white-space: nowrap; }
.view-all-link i { transition: transform 0.2s ease; margin-left: 4px; }
.view-all-link:hover i { transform: translateX(4px); }

/* ===== Brand story ===== */
.brand-story { background: var(--bg-secondary); position: relative; overflow: hidden; }
.brand-story .section-title { margin-bottom: 20px; }
.brand-story .lead-text { color: var(--text-secondary); font-size: 16px; line-height: 1.8; }
.brand-story-link { color: var(--accent); font-weight: 500; font-size: 15px; }
.brand-story-link i { transition: transform 0.2s ease; margin-left: 4px; }
.brand-story-link:hover i { transform: translateX(4px); }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.story-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}
.story-card:hover { transform: translateY(-4px); border-color: rgba(0,194,255,0.3); box-shadow: var(--shadow-hover); }
.story-card .icon { font-size: 24px; color: var(--accent); margin-bottom: 12px; display: block; }
.story-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.story-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 0; }

/* ===== Featured cards ===== */
.featured-section { background: var(--bg-primary); }
.featured-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: block;
  color: inherit;
  height: 100%;
}
.featured-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); color: inherit; }
.featured-card .card-img { overflow: hidden; }
.featured-card .card-img img { width: 100%; object-fit: cover; transition: transform 0.4s ease; }
.featured-card:hover .card-img img { transform: scale(1.03); }
.featured-card-large .card-img img { height: 280px; }
.featured-card-small .card-img img { height: 140px; }
.featured-card .card-body { padding: 24px; }
.featured-card-small .card-body { padding: 16px 20px 20px; }
.card-category {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0,194,255,0.15);
  border: 1px solid rgba(0,194,255,0.3);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}
.card-category.gold {
  background: rgba(245,166,35,0.12);
  border-color: rgba(245,166,35,0.4);
  color: var(--gold);
}
.featured-card h3 { font-size: 18px; font-weight: 600; line-height: 1.5; margin-bottom: 10px; color: var(--text-primary); }
.featured-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 14px; line-height: 1.6; }
.card-meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 12px; }

/* ===== Trust logos ===== */
.trust-section { padding: 60px 0; background: var(--bg-secondary); }
.trust-title { text-align: center; font-size: 22px; font-weight: 600; color: var(--text-primary); margin-bottom: 40px; }
.trust-logos { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-bottom: 48px; }
.trust-logo {
  width: 120px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s ease;
  filter: grayscale(1);
  opacity: 0.7;
}
.trust-logo:hover { filter: grayscale(0); opacity: 1; color: var(--accent); border-color: rgba(0,194,255,0.4); }
.stats-row { display: flex; justify-content: center; align-items: center; gap: 0; flex-wrap: wrap; }
.stat-item { text-align: center; padding: 0 48px; position: relative; }
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(255,255,255,0.1);
}
.stat-number { font-size: 40px; font-weight: 700; color: var(--accent); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ===== CMS News list ===== */
.news-section { background: var(--bg-primary); }
.news-layout { display: grid; grid-template-columns: 8fr 4fr; gap: 40px; }
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.2s ease;
}
.news-item:first-child { padding-top: 0; }
.news-item:last-child { border-bottom: none; }
.news-date {
  flex-shrink: 0;
  width: 90px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  padding-top: 4px;
}
.news-badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  margin-bottom: 8px;
  flex-shrink: 0;
}
.news-item h4 { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.news-item h4 a { color: inherit; transition: color 0.2s ease; }
.news-item h4 a:hover { color: var(--accent); }
.news-item p { font-size: 14px; color: var(--text-secondary); margin-bottom: 0; }
.sidebar-card {
  border-radius: var(--radius-lg);
  padding: 24px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  margin-bottom: 20px;
}
.sidebar-card h4 { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; }
.sidebar-recommend-item {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s ease;
}
.sidebar-recommend-item:last-child { border-bottom: none; }
.sidebar-recommend-item:hover { color: var(--accent); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-secondary); }
.faq-layout { display: grid; grid-template-columns: 8fr 4fr; gap: 40px; }
.accordion { --bs-accordion-bg: transparent; --bs-accordion-border-width: 0; --bs-accordion-btn-focus-box-shadow: none; }
.accordion-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg) !important;
  margin-bottom: 16px;
  overflow: hidden;
}
.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: rgba(0,194,255,0.4);
}
.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  padding: 18px 24px;
}
.accordion-button:not(.collapsed) { color: var(--accent); background: rgba(0,194,255,0.05); box-shadow: none; }
.accordion-button::after { flex-shrink: 0; }
.accordion-body { padding: 0 24px 20px; color: var(--text-secondary); font-size: 14px; }
.faq-side-card {
  background: linear-gradient(135deg, rgba(0,194,255,0.05), transparent);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  position: sticky;
  top: 100px;
}
.faq-side-card h4 { font-size: 18px; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; }
.faq-side-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }

/* ===== CTA subscribe ===== */
.subscribe-section { background: var(--bg-primary); }
.subscribe-card {
  background: linear-gradient(135deg, rgba(16,24,46,0.95), rgba(10,15,30,0.98));
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.subscribe-card::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(0,194,255,0.2);
  border-radius: 50%;
  filter: blur(100px);
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}
.subscribe-card h2 { font-size: 28px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; position: relative; }
.subscribe-card p { color: var(--text-secondary); font-size: 15px; margin-bottom: 32px; position: relative; }
.subscribe-form { display: flex; gap: 12px; max-width: 480px; margin: 0 auto; position: relative; }
.subscribe-form .form-control { height: 48px; }
.subscribe-form .btn { white-space: nowrap; }
.subscribe-note { margin-top: 16px; font-size: 12px; color: var(--text-muted); position: relative; }

/* ===== Footer ===== */
.footer { background: var(--bg-secondary); border-top: 1px solid rgba(255,255,255,0.08); padding: 64px 0 24px; }
.footer-brand .logo-badge { width: 40px; height: 40px; font-size: 20px; margin-bottom: 8px; }
.footer-brand-name { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.footer-brand-desc { font-size: 14px; color: var(--text-secondary); max-width: 280px; }
.footer h5 { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 20px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 14px; transition: color 0.2s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  margin-top: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-muted);
  font-size: 13px;
}
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  font-size: 16px;
}
.back-to-top:hover { color: var(--accent); border-color: var(--accent); background: rgba(0,194,255,0.15); transform: translateY(-4px); }

/* ===== Responsive ===== */
@media (max-width: 1199.98px) {
  .hero-title { font-size: 44px; }
  .news-layout { grid-template-columns: 7fr 5fr; gap: 24px; }
  .faq-layout { grid-template-columns: 7fr 5fr; gap: 24px; }
}
@media (max-width: 991.98px) {
  .section { padding: var(--space-section-md) 0; }
  .navbar-collapse {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(10,15,30,0.98);
    border-bottom: 1px solid var(--glass-border);
    padding: 20px 24px;
  }
  .navbar-nav { margin-left: 0; gap: 8px; }
  .navbar-nav .nav-link { font-size: 20px; line-height: 2.4; padding: 4px 0 !important; }
  .header-actions { gap: 8px; }
  .header-cta span.d-none { display: none !important; }
  .header-cta { padding: 10px 14px; }
  .hero-section { padding-top: 110px; text-align: left; }
  .hero-visual { margin-top: 32px; }
  .hero-title { font-size: 38px; }
  .story-grid { grid-template-columns: 1fr 1fr; }
  .news-layout { grid-template-columns: 1fr; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-side-card { position: static; }
  .stats-row .stat-item { width: 50%; margin-bottom: 24px; }
  .stat-item:nth-child(2)::after { display: none; }
  .subscribe-card { padding: 40px 24px; }
  .subscribe-form { flex-direction: column; }
  .subscribe-form .btn { width: 100%; }
}
@media (max-width: 575.98px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section { padding: var(--space-section-sm) 0; }
  .hero-section { padding: 100px 0 48px; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-trust { flex-direction: column; gap: 8px; align-items: flex-start; }
  .section-title { font-size: 24px; }
  .story-grid { grid-template-columns: 1fr; }
  .section-head-row { flex-direction: column; align-items: flex-start; }
  .featured-card-large .card-img img { height: 200px; }
  .featured-card-small .card-img img { height: 160px; }
  .news-item { flex-direction: column; gap: 8px; }
  .news-date { width: auto; }
  .stats-row { flex-direction: column; }
  .stat-item { width: 100% !important; margin-bottom: 24px; }
  .stat-item::after { display: none !important; }
  .footer { padding-top: 48px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-to-top { bottom: 20px; right: 20px; }
}

/* CMS empty state */
.cms-empty {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed var(--glass-border);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.02);
}
.cms-empty i {
  font-size: 48px;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 50%;
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  opacity: 0.7;
}

/* roulang page: category1 */
:root {
  --bg: #0A0F1E;
  --bg-secondary: #10182E;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.10);
  --border-glass: rgba(255, 255, 255, 0.10);
  --primary: #00C2FF;
  --primary-hover: #33D1FF;
  --accent: #F5A623;
  --success: #00E0A8;
  --text-main: #EAF2FF;
  --text-secondary: #A6B7D6;
  --text-muted: #64789B;
  --error: #FF5D5D;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.50), 0 0 0 1px rgba(0, 194, 255, 0.15);
  --transition: 0.3s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Inter", "Helvetica Neue", Arial, sans-serif;
  --header-h: 64px;
  --section-pad: 88px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--primary-hover);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input {
  font-family: inherit;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
.container {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}
section {
  padding: var(--section-pad) 0;
  position: relative;
}
.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.section-title-wrap h2 {
  font-size: 32px;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.3px;
}
.section-title-line {
  width: 4px;
  height: 22px;
  background: var(--primary);
  border-radius: 2px;
  display: inline-block;
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.5);
}
.text-secondary {
  color: var(--text-secondary);
}
.text-muted {
  color: var(--text-muted);
}
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: 12px 24px;
  transition: all 0.3s ease;
  font-size: 15px;
}
.btn-primary-custom {
  background: var(--primary);
  color: #071426;
  border: none;
  box-shadow: 0 0 20px rgba(0, 194, 255, 0.35);
}
.btn-primary-custom:hover {
  background: var(--primary-hover);
  color: #071426;
  box-shadow: 0 0 28px rgba(0, 194, 255, 0.55);
  transform: translateY(-1px);
}
.btn-primary-custom:active {
  transform: translateY(1px);
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.25);
}
.btn-outline-custom {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-outline-custom:hover {
  background: rgba(0, 194, 255, 0.12);
  color: var(--primary-hover);
  border-color: var(--primary-hover);
}
.btn-outline-custom:active {
  background: rgba(0, 194, 255, 0.2);
}
.btn-text-link {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  transition: gap 0.3s ease;
}
.btn-text-link:hover {
  color: var(--primary-hover);
  gap: 10px;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  transition: background 0.3s ease;
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
  white-space: nowrap;
}
.navbar-brand:hover {
  color: var(--text-main);
}
.logo-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7B61FF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #071426;
  font-size: 15px;
  box-shadow: 0 0 14px rgba(0, 194, 255, 0.4);
  flex-shrink: 0;
}
.navbar {
  padding-top: 0;
  padding-bottom: 0;
  height: 100%;
  flex-wrap: nowrap;
}
.navbar-collapse {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  flex-grow: 1;
}
.navbar-nav {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-right: auto;
  margin-left: 40px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px !important;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
  position: relative;
}
.nav-link:hover {
  color: var(--text-main);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 194, 255, 0.08);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(0, 194, 255, 0.6);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-search {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all 0.3s ease;
}
.header-search:hover {
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.2);
}
.header-cta {
  background: var(--primary);
  color: #071426;
  border-radius: var(--radius-md);
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 0 16px rgba(0, 194, 255, 0.3);
  transition: all 0.3s ease;
  border: none;
  text-decoration: none;
}
.header-cta:hover {
  background: var(--primary-hover);
  color: #071426;
  box-shadow: 0 0 24px rgba(0, 194, 255, 0.5);
  transform: translateY(-1px);
}
.navbar-toggler {
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  font-size: 16px;
}
.navbar-toggler:focus {
  box-shadow: none;
  border-color: var(--primary);
}
.pagination {
  --bs-pagination-active-bg: var(--primary);
  --bs-pagination-active-border-color: var(--primary);
}
/* Breadcrumb */
.breadcrumb-bar {
  padding-top: calc(var(--header-h) + 32px);
  padding-bottom: 12px;
  background: var(--bg);
}
.breadcrumb {
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--text-muted);
  background: transparent;
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-item + .breadcrumb-item::before {
  color: var(--text-muted);
  content: "›";
}
.breadcrumb-item.active {
  color: var(--text-secondary);
}
/* Hero */
.cat-hero {
  padding: 40px 0 calc(var(--section-pad) * 0.7);
  position: relative;
  overflow: hidden;
}
.cat-hero .hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity: 0.4;
  z-index: 0;
}
.cat-hero .hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--bg) 30%, transparent 90%);
}
.cat-hero .container {
  position: relative;
  z-index: 2;
}
.cat-hero .row {
  align-items: center;
}
.cat-hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin: 20px 0 16px;
}
.cat-hero h1 .brand-acc {
  background: linear-gradient(90deg, var(--primary), #7B61FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cat-hero .hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 28px;
}
.cat-hero .hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.cat-hero .hero-stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  font-family: "DIN Alternate", var(--font-family);
}
.cat-hero .hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 500;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--primary);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--primary);
  backdrop-filter: blur(8px);
  font-weight: 500;
}
/* Feature split */
.feature-split {
  padding: calc(var(--section-pad) * 0.6) 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.feature-split .row {
  align-items: center;
}
.feature-split .content-col {
  padding-right: 40px;
}
.feature-split h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.3px;
}
.feature-split p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 18px;
}
.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}
.feature-list li {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
}
.feature-list li:hover {
  border-color: rgba(0, 194, 255, 0.4);
  background: var(--bg-card-hover);
}
.feature-list li i {
  color: var(--primary);
  font-size: 16px;
  width: 20px;
  text-align: center;
}
.feature-split .image-col {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
}
.feature-split .image-col img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.feature-split .image-col:hover img {
  transform: scale(1.03);
}
.feature-split .image-col::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 15, 30, 0.6), transparent);
  pointer-events: none;
}
/* Service grid */
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  height: 100%;
}
.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 194, 255, 0.3);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.service-card .service-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 194, 255, 0.2), rgba(123, 97, 255, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 18px;
  border: 1px solid rgba(0, 194, 255, 0.2);
}
.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-main);
}
.service-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
/* Step */
.steps-section {
  background: var(--bg);
}
.steps-timeline {
  position: relative;
  padding-left: 0;
}
.steps-timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 20px;
  bottom: 20px;
  width: 1px;
  background: linear-gradient(to bottom, var(--primary), rgba(0, 194, 255, 0.1));
  transform: translateX(-50%);
}
.step-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  overflow: hidden;
}
.step-item:hover {
  border-color: rgba(0, 194, 255, 0.35);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7B61FF);
  color: #071426;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.35);
  margin-right: 20px;
}
.step-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}
.step-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
/* FAQ */
.faq-section {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass) !important;
  border-radius: var(--radius-lg) !important;
  margin-bottom: 14px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}
.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: rgba(0, 194, 255, 0.5) !important;
  box-shadow: 0 0 16px rgba(0, 194, 255, 0.12);
}
.accordion-button {
  background: transparent !important;
  color: var(--text-main) !important;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  box-shadow: none !important;
  border: none !important;
}
.accordion-button:not(.collapsed) {
  color: var(--primary) !important;
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2300C2FF' class='bi bi-chevron-down' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  transition: transform 0.3s ease;
  width: 18px;
  height: 18px;
}
.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}
.accordion-body {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.faq-cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(12px);
  text-align: center;
  position: sticky;
  top: 100px;
}
.faq-cta-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}
.faq-cta-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}
/* CTA */
.cta-section {
  background: var(--bg);
}
.cta-card {
  background: linear-gradient(135deg, rgba(0, 194, 255, 0.1), rgba(123, 97, 255, 0.08)), var(--bg-secondary);
  border: 1px solid rgba(0, 194, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.2), transparent 70%);
  pointer-events: none;
}
.cta-card h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-card p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}
.cta-card .btn {
  position: relative;
  z-index: 1;
}
/* Related links */
.related-links {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.related-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.related-link-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-main);
  transition: all 0.3s ease;
  text-decoration: none;
  backdrop-filter: blur(12px);
}
.related-link-card:hover {
  border-color: rgba(0, 194, 255, 0.4);
  box-shadow: var(--shadow-hover);
  color: var(--text-main);
  transform: translateY(-4px);
}
.related-link-card .related-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(0, 194, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
}
.related-link-card .related-text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
}
.related-link-card .related-arrow {
  color: var(--text-muted);
  transition: color 0.3s ease, transform 0.3s ease;
}
.related-link-card:hover .related-arrow {
  color: var(--primary);
  transform: translateX(4px);
}
/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 64px;
  padding-bottom: 0;
  position: relative;
}
.footer .footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}
.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}
.footer-brand-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
  padding-right: 20px;
}
.footer .container > .row {
  margin-bottom: 40px;
}
.footer h5 {
  color: var(--text-main);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: all 0.3s ease;
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
/* Back to top */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(10, 15, 30, 0.8);
  border: 1px solid var(--border-glass);
  color: var(--primary);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  z-index: 999;
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
.back-top:hover {
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(0, 194, 255, 0.3);
  transform: translateY(-2px);
  color: var(--primary);
}
/* Responsive */
@media (max-width: 991.98px) {
  :root {
    --section-pad: 64px;
  }
  .navbar-collapse {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 15, 30, 0.97);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
    z-index: -1;
    transform: translateY(-100%);
    transition: transform 0.4s ease;
    border-radius: 0;
  }
  .navbar-collapse.show {
    transform: translateY(0);
  }
  .navbar-collapse.collapsing {
    transform: translateY(-100%);
  }
  .navbar-nav {
    flex-direction: column;
    margin: 0;
    gap: 8px;
  }
  .navbar-nav .nav-link {
    font-size: 20px;
    padding: 12px 24px !important;
    line-height: 1;
  }
  .nav-link.active::after {
    bottom: 0;
  }
  .header-actions {
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
  }
  .header-search {
    display: none;
  }
  .header-cta {
    padding: 12px 32px;
    font-size: 16px;
  }
  .cat-hero h1 {
    font-size: 38px;
  }
  .cat-hero .hero-stats {
    gap: 24px;
  }
  .cat-hero .hero-stat-num {
    font-size: 30px;
  }
  .feature-split .content-col {
    padding-right: 0;
    margin-bottom: 32px;
  }
  .related-links-grid {
    grid-template-columns: 1fr;
  }
  .cta-card {
    padding: 40px 24px;
  }
}
@media (max-width: 575.98px) {
  :root {
    --section-pad: 48px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .navbar-brand {
    font-size: 17px;
  }
  .logo-badge {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }
  .cat-hero h1 {
    font-size: 30px;
  }
  .cat-hero .hero-sub {
    font-size: 15px;
  }
  .cat-hero .hero-stats {
    flex-wrap: wrap;
    gap: 16px;
  }
  .cat-hero .hero-stat-item {
    min-width: calc(50% - 16px);
  }
  .cat-hero .hero-stat-num {
    font-size: 26px;
  }
  .section-title-wrap h2 {
    font-size: 24px;
  }
  .feature-list {
    grid-template-columns: 1fr;
  }
  .steps-timeline::before {
    left: 22px;
  }
  .step-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }
  .step-num {
    margin-right: 0;
    margin-bottom: 12px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 4px;
  }
}

/* roulang page: article */
:root {
            --bg-primary: #0A0F1E;
            --bg-secondary: #10182E;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(16, 24, 46, 0.92);
            --glass-border: rgba(255, 255, 255, 0.10);
            --accent: #00C2FF;
            --accent-hover: #33D1FF;
            --accent-violet: #7B61FF;
            --warning: #F5A623;
            --success: #00E0A8;
            --text-primary: #EAF2FF;
            --text-secondary: #A6B7D6;
            --text-muted: #64789B;
            --danger: #FF5D5D;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.50), 0 0 0 1px rgba(0, 194, 255, 0.15);
            --shadow-btn: 0 0 20px rgba(0, 194, 255, 0.35);
            --font-family: "PingFang SC", "Microsoft YaHei", "Inter", "Helvetica Neue", Arial, sans-serif;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

        ul,
        ol {
            padding-left: 1.25rem;
        }

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 15, 30, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--glass-border);
            height: 64px;
            transition: var(--transition);
        }

        .site-header .navbar {
            height: 64px;
            padding: 0;
            flex-wrap: nowrap;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            padding: 0;
            margin-right: 36px;
        }

        .navbar-brand:hover {
            color: var(--accent);
        }

        .logo-badge {
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-violet));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #071426;
            font-size: 14px;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 194, 255, 0.4);
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: var(--radius-pill);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--text-primary) !important;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            color: var(--accent) !important;
            background: rgba(0, 194, 255, 0.10);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-left: auto;
        }

        .header-search {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--glass-border);
            background: var(--glass-bg);
            color: var(--text-secondary);
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .header-search:hover {
            color: var(--accent);
            border-color: var(--accent);
            box-shadow: 0 0 12px rgba(0, 194, 255, 0.2);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #071426;
            font-size: 14px;
            font-weight: 600;
            border: none;
            box-shadow: var(--shadow-btn);
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .header-cta:hover {
            background: var(--accent-hover);
            color: #071426;
            box-shadow: 0 0 30px rgba(0, 194, 255, 0.5);
            transform: translateY(-1px);
        }

        .header-cta:active {
            transform: translateY(1px);
            box-shadow: 0 0 14px rgba(0, 194, 255, 0.3);
        }

        .navbar-toggler {
            border: 1px solid var(--glass-border) !important;
            border-radius: var(--radius-sm) !important;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            background: var(--glass-bg);
            font-size: 18px;
            padding: 0;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 194, 255, 0.25) !important;
        }

        .search-panel {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            width: 320px;
            background: var(--glass-bg-strong);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 14px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: var(--transition);
            z-index: 999;
        }

        .search-panel.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .search-panel input {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            padding: 10px 14px;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .search-panel input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 12px rgba(0, 194, 255, 0.25);
        }

        .search-panel input::placeholder {
            color: var(--text-muted);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding-top: 32px;
            padding-bottom: 24px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: var(--transition);
        }

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

        .breadcrumb-nav i {
            font-size: 10px;
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb-nav span {
            color: var(--text-secondary);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        /* ===== Article Page ===== */
        .article-page {
            padding-top: 64px;
            padding-bottom: 88px;
            position: relative;
        }

        .article-page::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            height: 500px;
            background: radial-gradient(ellipse at top, rgba(0, 194, 255, 0.08), transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .article-page .container {
            position: relative;
            z-index: 1;
        }

        /* Article Header */
        .article-header {
            max-width: 800px;
            margin: 0 auto 40px;
            text-align: center;
        }

        .article-cat-badge {
            display: inline-flex;
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            background: rgba(0, 194, 255, 0.10);
            border: 1px solid rgba(0, 194, 255, 0.3);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .article-cat-badge:hover {
            background: rgba(0, 194, 255, 0.18);
            color: var(--accent-hover);
            border-color: var(--accent);
        }

        .article-header h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

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

        /* Article Content */
        .article-content-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 600;
            margin: 1.6em 0 0.7em;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 1.4em 0 0.6em;
            color: var(--text-secondary);
        }

        .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(0, 194, 255, 0.4);
        }

        .article-content a:hover {
            color: var(--accent-hover);
            text-decoration-color: var(--accent);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5em;
            padding-left: 1.5rem;
        }

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

        .article-content ul li::marker {
            color: var(--accent);
        }

        .article-content ol li::marker {
            color: var(--accent);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(255, 255, 255, 0.04);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 20px 24px;
            margin: 1.8em 0;
            color: var(--text-secondary);
            font-style: normal;
            font-size: 15px;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8em 0;
            font-size: 14px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            text-align: left;
        }

        .article-content table th {
            background: rgba(0, 194, 255, 0.08);
            color: var(--accent);
            font-weight: 600;
        }

        .article-content table tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 1.8em auto;
            box-shadow: var(--shadow-card);
        }

        .article-content code {
            background: rgba(0, 194, 255, 0.08);
            color: var(--accent);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.9em;
        }

        .article-content pre {
            background: #0B1120;
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 20px;
            overflow-x: auto;
            margin: 1.8em 0;
        }

        .article-content pre code {
            background: transparent;
            color: var(--text-primary);
            padding: 0;
            font-size: 14px;
        }

        .article-content hr {
            border: none;
            height: 1px;
            background: var(--glass-border);
            margin: 2.5em 0;
        }

        /* Article Tags */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--glass-border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .tag:hover {
            color: var(--accent);
            border-color: rgba(0, 194, 255, 0.4);
            background: rgba(0, 194, 255, 0.08);
        }

        .tag-hot {
            border-color: rgba(245, 166, 35, 0.4);
            color: var(--warning);
        }

        .tag-hot:hover {
            border-color: var(--warning);
            color: var(--warning);
            background: rgba(245, 166, 35, 0.08);
        }

        /* Prev / Next */
        .article-prevnext {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 40px;
        }

        .pn-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: var(--transition);
        }

        .pn-item:hover {
            border-color: rgba(0, 194, 255, 0.3);
            background: rgba(0, 194, 255, 0.05);
        }

        .pn-item a {
            display: flex;
            flex-direction: column;
            gap: 6px;
            color: var(--text-primary);
        }

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

        .pn-label {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .pn-title {
            font-size: 15px;
            font-weight: 600;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .pn-next {
            text-align: right;
        }

        .pn-next a {
            align-items: flex-end;
        }

        /* Return Link */
        .article-return {
            text-align: center;
            margin-top: 40px;
        }

        .article-return a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: rgba(0, 194, 255, 0.06);
            border: 1px solid rgba(0, 194, 255, 0.2);
            transition: var(--transition);
        }

        .article-return a:hover {
            background: rgba(0, 194, 255, 0.12);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .article-return a i {
            transition: transform 0.3s ease;
        }

        .article-return a:hover i {
            transform: translateX(4px);
        }

        /* Not Found */
        .article-not-found {
            max-width: 640px;
            margin: 60px auto;
            text-align: center;
            background: rgba(255, 255, 255, 0.03);
            border: 1px dashed var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            border-radius: 24px;
            background: rgba(0, 194, 255, 0.08);
            border: 1px solid rgba(0, 194, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent);
        }

        .article-not-found h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 28px;
            font-size: 15px;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #071426;
            font-size: 14px;
            font-weight: 600;
            border: none;
            box-shadow: var(--shadow-btn);
            transition: var(--transition);
            min-height: 44px;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #071426;
            box-shadow: 0 0 32px rgba(0, 194, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(0, 194, 255, 0.3);
        }

        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 194, 255, 0.3), var(--shadow-btn);
        }

        /* ===== Related Section ===== */
        .related-section {
            max-width: 1080px;
            margin: 72px auto 0;
            padding-top: 56px;
            border-top: 1px solid var(--glass-border);
        }

        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            position: relative;
            padding-left: 16px;
        }

        .section-heading h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            border-radius: var(--radius-pill);
            background: var(--accent);
            box-shadow: 0 0 12px rgba(0, 194, 255, 0.5);
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .section-link:hover {
            color: var(--accent-hover);
            gap: 10px;
        }

        .related-card {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 194, 255, 0.2);
        }

        .related-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .related-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent 55%, rgba(10, 15, 30, 0.5));
            pointer-events: none;
        }

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

        .related-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card:hover .related-card-body h3 {
            color: var(--accent);
        }

        .related-date {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-date i {
            font-size: 12px;
        }

        /* ===== Subscribe CTA ===== */
        .subscribe-cta {
            max-width: 900px;
            margin: 72px auto 0;
            background: linear-gradient(135deg, rgba(0, 194, 255, 0.08), rgba(123, 97, 255, 0.05));
            border: 1px solid rgba(0, 194, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .subscribe-cta::before {
            content: "";
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 200px;
            background: radial-gradient(ellipse, rgba(0, 194, 255, 0.15), transparent 70%);
            pointer-events: none;
        }

        .subscribe-cta h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            position: relative;
        }

        .subscribe-cta>p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
            position: relative;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            position: relative;
        }

        .subscribe-form input {
            flex: 1;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
            min-width: 0;
        }

        .subscribe-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 194, 255, 0.15);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .subscribe-note i {
            color: var(--accent);
            font-size: 12px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--glass-border);
            padding-top: 64px;
            padding-bottom: 24px;
        }

        .footer .container {
            max-width: 1280px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-brand .logo-badge {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            font-size: 16px;
        }

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

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .footer-links li {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-links li i {
            color: var(--accent);
            font-size: 14px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            margin-top: 48px;
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--glass-bg-strong);
            border: 1px solid var(--glass-border);
            color: var(--accent);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: var(--transition);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            border-color: var(--accent);
            background: rgba(0, 194, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 194, 255, 0.25);
            transform: translateY(-3px);
        }

        .back-to-top:active {
            transform: translateY(-1px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header {
                height: 60px;
            }

            .site-header .navbar {
                height: 60px;
            }

            .article-page {
                padding-top: 60px;
            }

            .navbar-collapse {
                background: var(--glass-bg-strong);
                border: 1px solid var(--glass-border);
                border-radius: var(--radius-lg);
                padding: 20px;
                margin-top: 8px;
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                box-shadow: var(--shadow-card);
            }

            .navbar-nav {
                gap: 2px;
            }

            .nav-link {
                padding: 12px 16px !important;
                font-size: 16px;
            }

            .header-actions {
                margin-top: 16px;
                padding-top: 16px;
                border-top: 1px solid var(--glass-border);
            }

            .header-cta {
                flex: 1;
                justify-content: center;
            }

            .article-header h1 {
                font-size: 34px;
            }

            .subscribe-form {
                flex-direction: column;
            }

            .subscribe-cta {
                padding: 40px 24px;
            }
        }

        @media (max-width: 767.98px) {
            .article-page {
                padding-bottom: 64px;
            }

            .article-header h1 {
                font-size: 28px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-prevnext {
                grid-template-columns: 1fr;
            }

            .pn-next {
                text-align: left;
            }

            .pn-next a {
                align-items: flex-start;
            }

            .related-section {
                margin-top: 56px;
                padding-top: 40px;
            }

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

            .footer {
                padding-top: 48px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .back-to-top {
                bottom: 20px;
                right: 20px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .breadcrumb-nav {
                font-size: 12px;
                padding-top: 24px;
                padding-bottom: 20px;
                gap: 6px;
            }

            .breadcrumb-nav span {
                max-width: 180px;
            }

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

            .article-header h1 {
                font-size: 24px;
                letter-spacing: 0;
            }

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

            .article-tags {
                gap: 8px;
            }

            .tag {
                padding: 4px 12px;
                font-size: 12px;
            }

            .article-not-found {
                padding: 40px 20px;
                margin: 32px auto;
            }

            .subscribe-cta {
                padding: 32px 20px;
                border-radius: 16px;
            }

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

            .section-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .related-card-body {
                padding: 16px 16px 18px;
            }

            .related-card-body h3 {
                font-size: 15px;
            }

            .back-to-top {
                width: 40px;
                height: 40px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
  --bg-dark: #0A0F1E;
  --bg-secondary: #10182E;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.10);
  --primary: #00C2FF;
  --primary-hover: #33D1FF;
  --accent: #F5A623;
  --success: #00E0A8;
  --text-main: #EAF2FF;
  --text-secondary: #A6B7D6;
  --text-muted: #64789B;
  --error: #FF5D5D;
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.50), 0 0 0 1px rgba(0, 194, 255, 0.15);
  --transition: all 0.3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Inter", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; display: block; }
button, input { font-family: inherit; border: none; background: none; }
.container { max-width: 1280px; padding-left: 24px; padding-right: 24px; }
section { position: relative; }

.text-muted-custom { color: var(--text-muted); }
.text-secondary-custom { color: var(--text-secondary); }

/* ===== Header & Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  height: 64px;
}
.site-header .navbar {
  height: 64px;
  padding: 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-main);
  white-space: nowrap;
}
.navbar-brand:hover { color: var(--text-main); }
.logo-badge {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7B61FF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #071426;
  font-size: 14px;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(0, 194, 255, 0.35);
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 32px;
}
.nav-item { list-style: none; }
.nav-link {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link:hover { color: var(--text-main); background: rgba(255, 255, 255, 0.05); }
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 194, 255, 0.08);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}
.header-search {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  cursor: pointer;
}
.header-search:hover { color: var(--primary); border-color: rgba(0, 194, 255, 0.3); }
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  background: var(--primary);
  color: #071426;
  font-weight: 600;
  font-size: 14px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 194, 255, 0.35);
  transition: var(--transition);
}
.header-cta:hover {
  background: var(--primary-hover);
  color: #071426;
  box-shadow: 0 0 30px rgba(0, 194, 255, 0.5);
  transform: translateY(-1px);
}
.navbar-toggler {
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 8px 12px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler i { font-size: 18px; }

/* ===== Hero Banner ===== */
.hero-banner {
  position: relative;
  padding: 150px 0 80px;
  background: linear-gradient(135deg, rgba(10, 15, 30, 0.88), rgba(16, 24, 46, 0.72)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.hero-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.25), transparent 70%);
  pointer-events: none;
}
.hero-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0, 194, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 194, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.hero-banner .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding: 0;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current { color: var(--text-main); }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(0, 194, 255, 0.35);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.hero-banner h1 {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text-main);
}
.hero-banner h1 .gradient-text {
  background: linear-gradient(90deg, #00C2FF, #7B61FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-banner p.lead-text {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 40px;
}
.hero-stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-stat-item .stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--primary);
  font-family: "DIN Alternate", "PingFang SC", sans-serif;
  line-height: 1.2;
}
.hero-stat-item .stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Section Base ===== */
.section-block { padding: 88px 0; position: relative; }
.section-block.bg-secondary { background: var(--bg-secondary); }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-label::before {
  content: '';
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.6);
}
.section-block h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-block h2 .accent { color: var(--primary); }
.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 32px;
  line-height: 1.75;
}

/* ===== Feature Split Blocks ===== */
.split-block {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 0;
}
.split-block.reverse { flex-direction: row-reverse; }
.split-block .split-image {
  flex: 0 0 50%;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.split-block .split-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: transform 0.5s ease;
}
.split-block .split-image:hover img { transform: scale(1.02); }
.split-block .split-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.2);
  pointer-events: none;
}
.split-block .split-content {
  flex: 1;
}
.split-block .split-content h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}
.split-block .split-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.split-block .split-content ul.feature-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}
.split-block .split-content ul.feature-list li {
  position: relative;
  padding: 6px 0 6px 28px;
  color: var(--text-main);
  font-size: 14px;
}
.split-block .split-content ul.feature-list li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 6px;
  color: var(--primary);
  font-size: 14px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}
.text-link:hover { gap: 12px; color: var(--primary-hover); }

/* ===== Feature Cards / 2x2 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.feature-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 194, 255, 0.15);
}
.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(0, 194, 255, 0.12);
  border: 1px solid rgba(0, 194, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
.feature-card.accent .feature-icon {
  background: rgba(245, 166, 35, 0.12);
  border-color: rgba(245, 166, 35, 0.25);
  color: var(--accent);
}
.feature-card.accent:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(245, 166, 35, 0.15);
}

/* ===== Process Timeline ===== */
.process-section { background: var(--bg-secondary); }
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 194, 255, 0.3), rgba(0, 194, 255, 0.1), rgba(0, 194, 255, 0.3));
}
.process-step {
  position: relative;
  text-align: center;
  padding: 0 12px;
}
.process-step .step-num {
  position: relative;
  z-index: 2;
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid rgba(0, 194, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  box-shadow: 0 0 20px rgba(0, 194, 255, 0.15);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ===== FAQ ===== */
.faq-wrap {
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  overflow: hidden;
}
.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.accordion-item:last-child { border-bottom: none; }
.accordion-button {
  background: transparent;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  padding: 20px 24px;
  border: none;
  box-shadow: none;
  transition: var(--transition);
}
.accordion-button::after {
  background: none;
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  content: '\f078';
  color: var(--text-secondary);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
.accordion-button:not(.collapsed) {
  background: rgba(0, 194, 255, 0.05);
  color: var(--primary);
}
.accordion-button:not(.collapsed)::after { transform: rotate(180deg); color: var(--primary); }
.accordion-button:focus { box-shadow: none; }
.accordion-item:first-of-type .accordion-button { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.accordion-body {
  padding: 4px 24px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.faq-side-card {
  background: linear-gradient(145deg, rgba(0, 194, 255, 0.08), rgba(0, 194, 255, 0.02));
  border: 1px solid rgba(0, 194, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 36px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-card);
}
.faq-side-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.faq-side-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section { padding: 48px 0 96px; }
.cta-card {
  position: relative;
  background: linear-gradient(145deg, rgba(16, 24, 46, 0.95), rgba(16, 24, 46, 0.8));
  border: 1px solid rgba(0, 194, 255, 0.2);
  border-radius: 24px;
  padding: 56px;
  text-align: center;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 194, 255, 0.2), transparent 70%);
  pointer-events: none;
}
.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.cta-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}
.cta-card .btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

/* ===== Buttons ===== */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}
.btn-primary-custom {
  background: var(--primary);
  color: #071426;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 20px rgba(0, 194, 255, 0.35);
  font-weight: 600;
  border: none;
}
.btn-primary-custom:hover {
  background: var(--primary-hover);
  color: #071426;
  box-shadow: 0 0 30px rgba(0, 194, 255, 0.5);
  transform: translateY(-2px);
}
.btn-primary-custom:active { transform: translateY(0); }
.btn-secondary-custom {
  background: transparent;
  border: 1px solid rgba(0, 194, 255, 0.5);
  color: var(--primary);
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-weight: 600;
}
.btn-secondary-custom:hover {
  background: rgba(0, 194, 255, 0.12);
  color: var(--primary);
  border-color: var(--primary);
}

/* ===== Inner Links ===== */
.inner-links {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.inner-links .link-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
  color: var(--text-main);
  font-weight: 500;
}
.inner-links .link-item:hover {
  background: rgba(0, 194, 255, 0.08);
  border-color: rgba(0, 194, 255, 0.2);
  color: var(--primary);
  transform: translateY(-2px);
}
.inner-links .link-item i {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(0, 194, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 15px;
  flex-shrink: 0;
}
.inner-links .link-item span { flex: 1; }
.inner-links .link-item small { color: var(--text-muted); font-size: 12px; }

/* ===== Footer ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 64px 0 24px;
}
.footer-brand { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.footer-brand .logo-badge { width: 36px; height: 36px; font-size: 16px; }
.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}
.footer-brand-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}
.footer h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-secondary);
  font-size: 13px;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-links li i { color: var(--text-muted); font-size: 13px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 28px;
  margin-top: 48px;
  font-size: 13px;
  color: var(--text-muted);
}
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  z-index: 999;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.back-to-top:hover {
  background: rgba(0, 194, 255, 0.2);
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* ===== Search Overlay ===== */
.search-overlay {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 900;
  background: rgba(16, 24, 46, 0.98);
  backdrop-filter: blur(24px);
  padding: 24px;
  display: none;
  border-bottom: 1px solid rgba(0, 194, 255, 0.15);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}
.search-overlay.show { display: block; }
.search-overlay .search-input-wrap {
  display: flex;
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}
.search-overlay input {
  flex: 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text-main);
  font-size: 15px;
  outline: none;
}
.search-overlay input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.15); }
.search-overlay input::placeholder { color: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .section-block { padding: 64px 0; }
  .navbar-collapse {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 24px 32px;
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .navbar-nav {
    flex-direction: column;
    margin-left: 0;
    gap: 4px;
    margin-bottom: 16px;
  }
  .nav-link { font-size: 16px; padding: 12px 14px; border-radius: 10px; }
  .header-actions { margin-left: 0; justify-content: space-between; padding-top: 12px; border-top: 1px solid rgba(255, 255, 255, 0.06); }
  .hero-banner h1 { font-size: 36px; }
  .split-block, .split-block.reverse { flex-direction: column; gap: 32px; }
  .split-block .split-image { width: 100%; flex: none; }
  .split-block .split-image img { height: 260px; }
  .process-steps { grid-template-columns: 1fr 1fr; gap: 32px; }
  .process-steps::before { display: none; }
  .faq-side-card { margin-top: 24px; }
}
@media (max-width: 575.98px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section-block { padding: 48px 0; }
  .hero-banner { padding: 120px 0 56px; }
  .hero-banner h1 { font-size: 32px; }
  .hero-banner h1 .gradient-text { display: block; }
  .hero-banner p.lead-text { font-size: 14px; }
  .hero-stats { gap: 20px; }
  .hero-stat-item .stat-num { font-size: 28px; }
  .section-block h2 { font-size: 26px; }
  .feature-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .cta-card { padding: 36px 24px; }
  .cta-card h2 { font-size: 24px; }
  .navbar-brand { font-size: 15px; }
  .logo-badge { width: 28px; height: 28px; font-size: 12px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-to-top { bottom: 20px; right: 20px; }
  .split-block .split-content h2 { font-size: 26px; }
}
@media (max-width: 768px) {
  .header-cta span { display: none !important; }
  .header-cta { padding: 9px 14px; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}