/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --primary-dark: #0a0f1a;
  --accent: #0ea5e9;
  --accent-dark: #0284c7;
  --accent-light: #38bdf8;
  --secondary: #14b8a6;
  --secondary-dark: #0d9488;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-gray: #f1f5f9;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 260px;
  --header-height: 0px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-dark); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ===== Layout ===== */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform var(--transition);
  overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,0.05);
}
.sidebar-brand {
  padding: 28px 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.3;
  letter-spacing: -0.3px;
}
.sidebar-brand .logo span { color: var(--accent); }
.sidebar-brand .logo-sub {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
  letter-spacing: 0.5px;
}
.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
}
.sidebar-nav .nav-item i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.sidebar-nav .nav-item:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-white);
}
.sidebar-nav .nav-item:hover i { color: var(--accent-light); }
.sidebar-nav .nav-item.active {
  background: rgba(14, 165, 233, 0.15);
  color: var(--accent-light);
  box-shadow: inset 3px 0 0 var(--accent);
}
.sidebar-nav .nav-item.active i { color: var(--accent-light); }
.sidebar-nav .nav-divider {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 8px 16px;
}
.sidebar-footer {
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  line-height: 1.5;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--primary);
  z-index: 999;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.mobile-header .logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-white);
}
.mobile-header .logo span { color: var(--accent); }
.mobile-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 22px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.mobile-toggle:hover { background: rgba(255,255,255,0.1); }
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition);
}
.sidebar-overlay.active { opacity: 1; }

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  padding: 100px 0 90px;
  background: var(--primary);
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.25;
  pointer-events: none;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.70) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(14,165,233,0.15);
  border: 1px solid rgba(14,165,233,0.25);
  border-radius: 50px;
  color: var(--accent-light);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}
.hero h1 span { color: var(--accent-light); }
.hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 580px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  border: none;
  line-height: 1.2;
}
.btn-primary {
  background: var(--accent);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(14,165,233,0.35);
}
.btn-primary:hover {
  background: var(--accent-dark);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14,165,233,0.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline-light {
  background: transparent;
  color: var(--text-white);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: var(--text-white);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat {
  text-align: left;
}
.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.1;
}
.hero-stat .num span { color: var(--accent-light); }
.hero-stat .label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

/* ===== Section Shared ===== */
.section {
  padding: 80px 0;
}
.section-alt { background: var(--bg-gray); }
.section-dark { background: var(--primary); color: var(--text-white); }
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-header .subtitle {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(14,165,233,0.08);
  border-radius: 50px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.3px;
}
.section-dark .section-header h2 { color: var(--text-white); }
.section-header h2 span { color: var(--accent); }
.section-header p {
  font-size: 17px;
  color: var(--text-light);
  margin-top: 12px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.section-dark .section-header p { color: rgba(255,255,255,0.6); }
.section-header.text-left { text-align: left; }
.section-header.text-left p { margin-left: 0; }

/* ===== Cards Grid ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

/* ===== Card ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.card-body { padding: 28px; }
.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--accent); }
.card-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
  margin-top: 12px;
}
.card-meta i { font-size: 12px; }
.card-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(14,165,233,0.08);
  border-radius: 50px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
}
.card .badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(20,184,166,0.1);
  color: var(--secondary-dark);
}

/* ===== Category Cards ===== */
.cat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}
.cat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.cat-card .cat-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.cat-card .cat-body {
  padding: 24px 28px 28px;
}
.cat-card .cat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(14,165,233,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 14px;
}
.cat-card .cat-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cat-card .cat-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}
.cat-card .cat-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.cat-card .cat-link i { font-size: 12px; transition: transform var(--transition); }
.cat-card .cat-link:hover i { transform: translateX(4px); }

/* ===== Feature Cards ===== */
.feature-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-card .f-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: rgba(14,165,233,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
  transition: all var(--transition);
}
.feature-card:hover .f-icon {
  background: var(--accent);
  color: var(--text-white);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== Stats / KPI ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.stat-card .stat-icon {
  font-size: 28px;
  color: var(--accent);
  margin-bottom: 12px;
}
.stat-card .stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}
.stat-card .stat-num span { color: var(--accent); }
.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 6px;
}

/* ===== Steps / Process ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  counter-reset: step;
}
.step-item {
  text-align: center;
  position: relative;
}
.step-item::after {
  content: '';
  position: absolute;
  top: 32px;
  right: -16px;
  width: 32px;
  height: 2px;
  background: var(--border);
  display: none;
}
.step-item:not(:last-child)::after { display: block; }
.step-num {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-white);
  font-size: 24px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(14,165,233,0.3);
}
.step-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: none;
  transition: background var(--transition);
  gap: 16px;
}
.faq-question:hover { background: var(--bg-gray); }
.faq-question i {
  font-size: 14px;
  color: var(--text-light);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.active .faq-answer {
  max-height: 400px;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}
.cta-content p {
  font-size: 17px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 28px;
  line-height: 1.7;
}
.cta-content .btn-primary {
  background: var(--accent);
  font-size: 16px;
  padding: 16px 40px;
}
.cta-content .btn-primary:hover {
  background: var(--accent-light);
}

/* ===== Content List ===== */
.content-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.content-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.content-item:hover {
  box-shadow: var(--shadow);
  border-color: rgba(14,165,233,0.2);
}
.content-item .ci-img {
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.content-item .ci-body { flex: 1; min-width: 0; }
.content-item .ci-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.4;
}
.content-item .ci-title a { color: var(--text); }
.content-item .ci-title a:hover { color: var(--accent); }
.content-item .ci-excerpt {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.content-item .ci-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
  margin-top: 8px;
}
.content-item .ci-meta i { font-size: 12px; }
.content-item .ci-tag {
  display: inline-block;
  padding: 1px 10px;
  background: rgba(14,165,233,0.08);
  border-radius: 50px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}
.empty-state i {
  font-size: 48px;
  color: var(--border);
  margin-bottom: 16px;
}
.empty-state p {
  font-size: 16px;
  color: var(--text-light);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.6);
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-brand .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}
.footer-brand .logo span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer-col ul a:hover { color: var(--accent-light); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--accent-light); }
.footer-socials {
  display: flex;
  gap: 12px;
}
.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.4);
  font-size: 15px;
  transition: all var(--transition);
}
.footer-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(14,165,233,0.1);
}

/* ===== Back to Top ===== */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  z-index: 100;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition);
}
.back-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-top:hover {
  background: var(--accent-dark);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .container { padding: 0 28px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step-item:not(:last-child)::after { display: none; }
  .hero h1 { font-size: 36px; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; padding-top: 64px; }
  .sidebar-overlay { display: block; }
  .sidebar-overlay.active { display: block; }
  
  .hero { padding: 60px 0 50px; min-height: auto; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat .num { font-size: 26px; }
  .section { padding: 56px 0; }
  .section-header h2 { font-size: 26px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .content-item { flex-direction: column; }
  .content-item .ci-img { width: 100%; height: 160px; }
  .cta-section { padding: 56px 0; }
  .cta-content h2 { font-size: 26px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .container { padding: 0 20px; }
  .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 16px; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 24px; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .section-header h2 { font-size: 22px; }
  .cat-card .cat-img { height: 160px; }
}

/* roulang page: article */
:root {
  --primary: #0f2b4a;
  --primary-light: #1a3f64;
  --primary-lighter: #2a5a8a;
  --accent: #3b9eff;
  --accent-light: #6bb5ff;
  --accent-glow: rgba(59, 158, 255, 0.25);
  --bg-body: #f0f4f8;
  --bg-card: #ffffff;
  --bg-sidebar: #0b1d33;
  --bg-sidebar-hover: rgba(255,255,255,0.06);
  --bg-sidebar-active: rgba(59,158,255,0.15);
  --text-primary: #1a2332;
  --text-secondary: #4a5a72;
  --text-weak: #8a9bb0;
  --text-inverse: #ffffff;
  --text-sidebar: rgba(255,255,255,0.75);
  --border-light: #e2e8f0;
  --border-card: #edf2f7;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.05);
  --spacing-xs: 6px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --sidebar-width: 235px;
  --header-height: 0px;
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-base); background: var(--bg-body); color: var(--text-primary); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-lighter); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
input, button, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }

/* ===== 布局 ===== */
.app-layout { display: flex; min-height: 100vh; }

/* ===== 左侧导航 ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,0.04);
  box-shadow: 2px 0 20px rgba(0,0,0,0.15);
  transition: transform 0.3s ease;
}
.sidebar-brand {
  padding: 22px 16px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-brand .logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.3px;
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.sidebar-brand .logo span {
  font-size: 14px;
  font-weight: 400;
  color: var(--accent-light);
  letter-spacing: 0.5px;
}
.sidebar-nav { flex: 1; padding: 12px 0; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 18px;
  margin: 2px 10px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
}
.nav-item i { width: 20px; text-align: center; font-size: 16px; color: rgba(255,255,255,0.35); transition: color 0.2s; }
.nav-item:hover { background: var(--bg-sidebar-hover); color: #fff; }
.nav-item:hover i { color: var(--accent-light); }
.nav-item.active { background: var(--bg-sidebar-active); color: #fff; }
.nav-item.active i { color: var(--accent); }
.nav-divider { height: 1px; background: rgba(255,255,255,0.06); margin: 12px 16px; }
.sidebar-footer-text { padding: 12px 16px; font-size: 13px; color: rgba(255,255,255,0.3); border-top: 1px solid rgba(255,255,255,0.04); }

/* ===== 右侧主内容 ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.page-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-light);
  padding: 0 var(--spacing-lg);
  height: 64px;
  display: none;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.mobile-menu-toggle { background: none; border: none; font-size: 22px; color: var(--text-primary); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
.mobile-menu-toggle:hover { background: var(--bg-body); }
.mobile-logo { font-size: 18px; font-weight: 700; color: var(--primary); }
.mobile-logo span { color: var(--accent); font-weight: 400; font-size: 13px; }
.content-wrap { flex: 1; padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-xl); }

/* ===== 面包屑 ===== */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-weak); margin-bottom: var(--spacing-md); flex-wrap: wrap; }
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-weak); opacity: 0.5; }
.breadcrumb .current { color: var(--text-secondary); font-weight: 500; }

/* ===== 文章主体 ===== */
.article-wrapper { max-width: 860px; margin: 0 auto; }
.article-header { margin-bottom: var(--spacing-lg); }
.article-category {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 3px 14px;
  border-radius: 20px;
  letter-spacing: 0.3px;
  margin-bottom: var(--spacing-sm);
}
.article-title { font-size: 32px; font-weight: 800; line-height: 1.3; color: var(--text-primary); margin-bottom: var(--spacing-sm); letter-spacing: -0.5px; }
.article-meta { display: flex; align-items: center; gap: var(--spacing-md); font-size: 14px; color: var(--text-weak); flex-wrap: wrap; }
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta i { font-size: 14px; color: var(--text-weak); }
.article-image-wrap { margin-bottom: var(--spacing-lg); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
.article-image-wrap img { width: 100%; height: auto; max-height: 480px; object-fit: cover; }
.article-body { font-size: 17px; line-height: 1.9; color: var(--text-secondary); }
.article-body p { margin-bottom: 1.2em; }
.article-body h2, .article-body h3 { color: var(--text-primary); margin-top: 1.5em; margin-bottom: 0.6em; font-weight: 700; }
.article-body h2 { font-size: 24px; }
.article-body h3 { font-size: 20px; }
.article-body ul, .article-body ol { margin-bottom: 1.2em; padding-left: 1.8em; }
.article-body li { margin-bottom: 0.4em; }
.article-body blockquote { border-left: 4px solid var(--accent); padding: 12px 20px; margin: 1.2em 0; background: rgba(59,158,255,0.06); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); }
.article-body img { border-radius: var(--radius-sm); margin: 1.2em 0; }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-lighter); }

/* ===== 文章标签 ===== */
.article-tags { display: flex; align-items: center; gap: 10px; margin-top: var(--spacing-lg); padding-top: var(--spacing-md); border-top: 1px solid var(--border-light); flex-wrap: wrap; }
.article-tags .tag-label { font-size: 14px; color: var(--text-weak); }
.article-tags .tag { display: inline-block; background: var(--bg-body); color: var(--text-secondary); font-size: 13px; padding: 4px 14px; border-radius: 20px; border: 1px solid var(--border-light); transition: all 0.2s; }
.article-tags .tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== 上下篇导航 ===== */
.article-nav { display: flex; justify-content: space-between; gap: var(--spacing-md); margin-top: var(--spacing-xl); padding-top: var(--spacing-md); border-top: 1px solid var(--border-light); }
.article-nav a { flex: 1; padding: var(--spacing-md); background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-card); transition: all 0.25s; display: flex; flex-direction: column; gap: 4px; }
.article-nav a:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-nav .nav-label { font-size: 12px; color: var(--text-weak); text-transform: uppercase; letter-spacing: 0.5px; }
.article-nav .nav-title { font-size: 15px; font-weight: 600; color: var(--text-primary); line-height: 1.4; }
.article-nav .nav-right { text-align: right; }

/* ===== 相关推荐 ===== */
.related-section { margin-top: var(--spacing-2xl); }
.related-section h2 { font-size: 24px; font-weight: 700; color: var(--text-primary); margin-bottom: var(--spacing-lg); display: flex; align-items: center; gap: 10px; }
.related-section h2 i { color: var(--accent); font-size: 22px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
.related-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-card); transition: all 0.25s; box-shadow: var(--shadow-sm); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-light); }
.related-card .card-img { width: 100%; height: 160px; object-fit: cover; }
.related-card .card-body { padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md); }
.related-card .card-title { font-size: 16px; font-weight: 600; color: var(--text-primary); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-meta { font-size: 13px; color: var(--text-weak); margin-top: 6px; }

/* ===== 未找到 ===== */
.not-found-wrap { text-align: center; padding: 80px 20px; }
.not-found-wrap i { font-size: 60px; color: var(--text-weak); opacity: 0.3; margin-bottom: var(--spacing-md); }
.not-found-wrap h2 { font-size: 28px; color: var(--text-primary); margin-bottom: var(--spacing-sm); }
.not-found-wrap p { color: var(--text-secondary); margin-bottom: var(--spacing-lg); }
.not-found-wrap .btn { display: inline-block; padding: 12px 30px; background: var(--accent); color: #fff; border-radius: var(--radius-sm); font-weight: 600; transition: all 0.2s; }
.not-found-wrap .btn:hover { background: var(--primary-lighter); transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ===== 页脚 ===== */
.site-footer { background: var(--bg-sidebar); color: rgba(255,255,255,0.6); padding: var(--spacing-xl) 0 var(--spacing-md); margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.footer-brand .logo { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: var(--spacing-sm); display: flex; flex-direction: column; line-height: 1.3; }
.footer-brand .logo span { font-size: 14px; font-weight: 400; color: var(--accent-light); }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.45); max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: var(--spacing-sm); }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 14px; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--spacing-md); border-top: 1px solid rgba(255,255,255,0.06); font-size: 13px; color: rgba(255,255,255,0.3); flex-wrap: wrap; gap: var(--spacing-sm); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a { color: rgba(255,255,255,0.4); font-size: 18px; transition: color 0.2s; }
.footer-socials a:hover { color: var(--accent-light); }

/* ===== 移动端遮罩 ===== */
.sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; display: none; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .main-content { margin-left: 0; }
  .page-header { display: flex; }
  .content-wrap { padding: var(--spacing-md); }
  .article-title { font-size: 26px; }
  .article-body { font-size: 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
  .article-nav { flex-direction: column; }
  .article-nav a { flex: none; }
}
@media (max-width: 520px) {
  .article-title { font-size: 22px; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
  .content-wrap { padding: var(--spacing-sm); }
  .breadcrumb { font-size: 13px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0d1a3e;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f4f7fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text-primary: #1a202c;
            --text-secondary: #4a5568;
            --text-muted: #94a3b8;
            --text-inverse: #ffffff;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.1);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Sidebar Layout ===== */
        .site-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-dark);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: 2px 0 30px rgba(0, 0, 0, 0.2);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .sidebar-brand .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .sidebar-brand .logo span {
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-brand .logo-sub {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-inverse);
        }
        .sidebar-nav .nav-item:hover i {
            color: var(--accent);
        }
        .sidebar-nav .nav-item.active {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent);
        }
        .sidebar-nav .nav-item.active i {
            color: var(--accent);
        }
        .sidebar-nav .nav-item.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 4px 4px 0;
        }

        .nav-divider {
            height: 1px;
            background: var(--border-light);
            margin: 12px 16px;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.25);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Page Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 24px 64px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            width: 100%;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(245, 158, 11, 0.2);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(245, 158, 11, 0.2);
        }
        .page-hero h1 {
            font-size: 44px;
            color: var(--text-inverse);
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -1px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .page-hero .hero-stats .stat-item {
            text-align: center;
        }
        .page-hero .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .page-hero .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 64px 24px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-block;
            background: rgba(245, 158, 11, 0.1);
            color: var(--accent-dark);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-header .section-line {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card-grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .card-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card .card-body {
            padding: 20px;
        }
        .card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card .card-body h3 a {
            color: var(--text-primary);
        }
        .card .card-body h3 a:hover {
            color: var(--accent-dark);
        }
        .card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card .card-body .meta i {
            margin-right: 4px;
        }
        .card .card-tag {
            display: inline-block;
            background: rgba(26, 42, 108, 0.08);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card .card-tag.hot {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent-dark);
        }

        /* ===== Category / Tag Badges ===== */
        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .badge-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            transition: var(--transition);
            cursor: default;
        }
        .badge-item i {
            color: var(--accent);
            font-size: 14px;
        }
        .badge-item:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            box-shadow: var(--shadow-sm);
        }

        /* ===== Featured / Big Card ===== */
        .featured-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .featured-block .featured-img img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }
        .featured-block .featured-text h2 {
            font-size: 30px;
            margin-bottom: 16px;
        }
        .featured-block .featured-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .featured-block .featured-text .featured-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .featured-block .featured-text .featured-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-primary);
        }
        .featured-block .featured-text .featured-list li i {
            color: var(--accent);
            font-size: 16px;
            width: 24px;
            text-align: center;
        }

        /* ===== Data / Stats Block ===== */
        .stats-block {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin: 32px 0;
        }
        .stats-block .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stats-block .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stats-block .stat-card .stat-icon {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stats-block .stat-card .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .stats-block .stat-card .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ===== Flow / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-inverse);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px;
        }
        .step-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-item .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            font-size: 14px;
        }
        .faq-item .faq-question:hover {
            background: rgba(245, 158, 11, 0.04);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 32px;
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-primary);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: var(--text-inverse);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-inverse);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn .fa-arrow-right {
            transition: transform 0.3s;
        }
        .btn:hover .fa-arrow-right {
            transform: translateX(4px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 24px 0;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-light);
        }
        .footer-brand .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-brand .logo span {
            color: var(--accent);
            font-weight: 600;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: var(--text-inverse);
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            color: rgba(255, 255, 255, 0.4);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            color: var(--accent);
            transform: scale(1.1);
        }

        /* ===== Mobile Menu Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--bg-dark);
            color: var(--text-inverse);
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
        }
        .mobile-toggle:hover {
            background: var(--primary);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(2px);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 20px 24px 0;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-block {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .featured-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .section-header h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-toggle {
                display: flex;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .stats-block {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stats-block .stat-card {
                padding: 20px 12px;
            }
            .stats-block .stat-card .stat-number {
                font-size: 28px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-hero {
                padding: 100px 16px 48px;
                min-height: 280px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .page-hero .hero-stats {
                gap: 24px;
            }
            .page-hero .hero-stats .stat-number {
                font-size: 26px;
            }
            .section {
                padding: 40px 16px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .featured-block .featured-text h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .breadcrumb {
                padding: 16px 16px 0;
                font-size: 13px;
                flex-wrap: wrap;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-block {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .page-hero .hero-stats {
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }
            .page-hero .hero-stats .stat-item {
                flex-direction: row;
                display: flex;
                align-items: center;
                gap: 10px;
            }
            .page-hero .hero-stats .stat-number {
                font-size: 22px;
            }
            .page-hero .hero-stats .stat-label {
                font-size: 13px;
            }
            .sidebar-brand .logo {
                font-size: 18px;
            }
            .sidebar-nav .nav-item {
                font-size: 14px;
                padding: 10px 14px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .badge-item {
                padding: 6px 14px;
                font-size: 13px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1a2e;
            --primary-light: #1a2d4a;
            --primary-dark: #080e1a;
            --accent: #3b82f6;
            --accent-light: #60a5fa;
            --accent-dark: #2563eb;
            --accent-soft: rgba(59, 130, 246, 0.12);
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --bg-body: #f1f5f9;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-section-alt: #f8fafc;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul, ol { list-style: none; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.05);
        }
        .sidebar-logo {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .sidebar-logo .logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.3px;
            line-height: 1.3;
        }
        .sidebar-logo .logo span {
            color: var(--accent-light);
            font-weight: 400;
            display: block;
            font-size: 14px;
            letter-spacing: 0.5px;
            margin-top: 2px;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: rgba(255,255,255,0.65);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255,255,255,0.08);
            color: #fff;
        }
        .sidebar-nav .nav-item.active {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(59,130,246,0.35);
        }
        .sidebar-nav .nav-divider {
            height: 1px;
            background: rgba(255,255,255,0.08);
            margin: 12px 16px;
        }
        .sidebar-nav .nav-footnote {
            padding: 12px 16px;
            font-size: 13px;
            color: rgba(255,255,255,0.25);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: auto;
        }

        /* ===== Main Content Area ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            background: var(--primary);
            padding: 16px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 999;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-header .logo {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }
        .mobile-header .logo span {
            color: var(--accent-light);
            font-weight: 400;
        }
        .mobile-toggle {
            color: #fff;
            font-size: 22px;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.08);
        }
        .mobile-toggle:hover {
            background: rgba(255,255,255,0.15);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 998;
            backdrop-filter: blur(4px);
        }
        .mobile-overlay.open {
            display: block;
        }
        .sidebar.open {
            transform: translateX(0);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,46,0.92) 0%, rgba(15,26,46,0.70) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(59,130,246,0.18);
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 16px;
            border: 1px solid rgba(59,130,246,0.25);
            letter-spacing: 0.3px;
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 span {
            color: var(--accent-light);
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255,255,255,0.7);
            max-width: 640px;
            line-height: 1.7;
        }
        .page-hero .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .page-hero .hero-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .page-hero .hero-stats .stat-number {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .page-hero .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.5);
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: rgba(255,255,255,0.6);
        }
        .section-header .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--border-medium);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 2px 10px;
            border-radius: 50px;
            margin-bottom: 10px;
        }

        /* ===== Entry Cards Grid ===== */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }
        .entry-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 28px 24px;
            transition: var(--transition);
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .entry-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .entry-card .entry-icon {
            width: 52px;
            height: 52px;
            background: var(--accent-soft);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .entry-card:hover .entry-icon {
            background: var(--accent);
            color: #fff;
        }
        .entry-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .entry-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .entry-card .entry-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-muted);
        }
        .entry-card .entry-meta i {
            margin-right: 4px;
        }
        .entry-card .entry-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
            margin-top: 14px;
            transition: var(--transition);
        }
        .entry-card .entry-link:hover {
            gap: 10px;
            color: var(--accent-dark);
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            counter-increment: step;
            position: relative;
        }
        .step-item::before {
            content: counter(step);
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(59,130,246,0.3);
        }
        .step-item h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 260px;
            margin: 0 auto;
        }
        .step-item:not(:last-child)::after {
            content: '\f054';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: -20px;
            top: 24px;
            color: var(--accent);
            font-size: 14px;
            opacity: 0.4;
        }

        /* ===== Safety Tips ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .safety-item {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
        }
        .safety-item:hover {
            background: rgba(255,255,255,0.07);
            border-color: rgba(59,130,246,0.25);
        }
        .safety-item .safety-icon {
            font-size: 24px;
            color: var(--accent-light);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .safety-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }
        .safety-item p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-medium);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(59,130,246,0.03);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }
        .cta-block > * {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 16px;
            color: rgba(255,255,255,0.65);
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(59,130,246,0.3);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            box-shadow: 0 6px 24px rgba(59,130,246,0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.25);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.5);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            background: var(--accent-soft);
            color: var(--accent);
            letter-spacing: 0.2px;
        }
        .tag-green {
            background: rgba(16,185,129,0.12);
            color: var(--success);
        }
        .tag-orange {
            background: rgba(245,158,11,0.12);
            color: var(--warning);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .footer-brand .logo span {
            color: var(--accent-light);
            font-weight: 400;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.4);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.45);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: rgba(255,255,255,0.3);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.35);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--accent);
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .page-hero {
                padding: 60px 0 52px;
                min-height: 260px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .page-hero .hero-stats {
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
            .steps-grid {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 48px 0 40px;
                min-height: 220px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .page-hero .hero-stats .stat-number {
                font-size: 22px;
            }
            .entry-grid {
                grid-template-columns: 1fr;
            }
            .safety-grid {
                grid-template-columns: 1fr;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 24px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 40px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin: 0 auto;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 22px;
            }
            .page-hero .hero-stats {
                gap: 16px;
                flex-direction: column;
            }
            .entry-card {
                padding: 20px 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .cta-block .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, .nav-item:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }

/* Fallback for initial FAQ open state */
        .faq-item.open .faq-answer {
            max-height: 300px !important;
            padding: 0 24px 20px !important;
        }