/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0c1929;
  --primary-light: #1a2d48;
  --primary-dark: #070f1a;
  --secondary: #d4a54a;
  --secondary-light: #e8c06a;
  --secondary-dark: #b88930;
  --accent: #e8453c;
  --accent-light: #f06058;
  --bg: #f4f6fa;
  --bg-card: #ffffff;
  --bg-dark: #0a1628;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --text-white: #f0f2f5;
  --border: #e5e7eb;
  --border-light: #f0f2f5;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.07);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-dark: 0 4px 20px rgba(0,0,0,0.25);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --nav-width: 240px;
  --header-height: 0px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  display: flex;
  min-height: 100vh;
}
a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul { list-style: none; }

/* ===== Container ===== */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Sidebar Navigation ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform var(--transition);
  box-shadow: 2px 0 20px rgba(0,0,0,0.2);
}
.sidebar-logo {
  padding: 32px 24px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  font-weight: 800;
  flex-shrink: 0;
}
.sidebar-logo .logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 1px;
}
.sidebar-logo .logo-text span { color: var(--secondary); }
.sidebar-nav { flex: 1; padding: 24px 16px; overflow-y: auto; }
.sidebar-nav .nav-section { margin-bottom: 24px; }
.sidebar-nav .nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.3);
  padding: 0 8px;
  margin-bottom: 8px;
  font-weight: 600;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 2px;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; color: rgba(255,255,255,0.4); transition: var(--transition); }
.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: var(--text-white); }
.sidebar-nav a:hover i { color: var(--secondary); }
.sidebar-nav a.active { background: rgba(212,165,74,0.15); color: var(--secondary); }
.sidebar-nav a.active i { color: var(--secondary); }
.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  text-align: center;
}

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

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--primary);
  z-index: 999;
  padding: 0 16px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.mobile-header .menu-btn {
  background: none;
  border: none;
  color: var(--text-white);
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: var(--transition);
}
.mobile-header .menu-btn:hover { background: rgba(255,255,255,0.1); }
.mobile-header .mobile-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
}
.mobile-header .mobile-logo span { color: var(--secondary); }

/* ===== Overlay ===== */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  backdrop-filter: blur(4px);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
  background: var(--primary-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.3;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(12,25,41,0.92) 0%, rgba(12,25,41,0.7) 50%, rgba(12,25,41,0.85) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero-badge {
  display: inline-block;
  background: rgba(212,165,74,0.18);
  color: var(--secondary);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  border: 1px solid rgba(212,165,74,0.2);
}
.hero h1 {
  font-size: 48px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.hero h1 span { color: var(--secondary); }
.hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: transparent;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(212,165,74,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(212,165,74,0.4); color: var(--primary); }
.btn-outline {
  border: 2px solid rgba(255,255,255,0.25);
  color: var(--text-white);
  background: transparent;
}
.btn-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(212,165,74,0.08); transform: translateY(-2px); }

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .tag {
  display: inline-block;
  background: rgba(212,165,74,0.12);
  color: var(--secondary-dark);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-light);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Features Grid ===== */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 28px 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-light);
  text-align: center;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(212,165,74,0.2); }
.feature-card .icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(212,165,74,0.12), rgba(212,165,74,0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 26px;
  color: var(--secondary);
  transition: var(--transition);
}
.feature-card:hover .icon { background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)); color: var(--primary); }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* ===== Category Grid ===== */
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  cursor: pointer;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.category-card .cat-img {
  width: 100%; height: 180px;
  object-fit: cover;
  transition: var(--transition);
}
.category-card:hover .cat-img { transform: scale(1.05); }
.category-card .cat-body { padding: 20px 20px 24px; text-align: center; }
.category-card .cat-body h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.category-card .cat-body p { font-size: 13px; color: var(--text-light); margin-bottom: 12px; }
.category-card .cat-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  color: var(--secondary-dark);
  background: rgba(212,165,74,0.1);
}

/* ===== Hot Events (Ticket Style) ===== */
.events-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.event-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
}
.event-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.event-card .event-img {
  width: 100%; height: 140px;
  object-fit: cover;
}
.event-card .event-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.event-card .event-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.event-card .event-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--secondary-dark);
  background: rgba(212,165,74,0.1);
  padding: 2px 12px;
  border-radius: 50px;
}
.event-card .event-date { font-size: 12px; color: var(--text-light); }
.event-card h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.event-card p { font-size: 13px; color: var(--text-light); flex: 1; margin-bottom: 12px; line-height: 1.5; }
.event-card .event-footer { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px solid var(--border-light); }
.event-card .event-price { font-size: 18px; font-weight: 800; color: var(--accent); }
.event-card .event-price small { font-size: 12px; font-weight: 400; color: var(--text-light); }
.event-card .btn-small {
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary);
  color: var(--text-white);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.event-card .btn-small:hover { background: var(--primary-light); transform: translateY(-1px); }

/* ===== CMS News List ===== */
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
  display: flex;
  gap: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-light);
  align-items: flex-start;
}
.news-item:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); border-color: rgba(212,165,74,0.15); }
.news-item .news-img {
  width: 180px; height: 120px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.news-item .news-body { flex: 1; }
.news-item .news-meta { display: flex; gap: 16px; align-items: center; margin-bottom: 6px; flex-wrap: wrap; }
.news-item .news-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--secondary-dark);
  background: rgba(212,165,74,0.1);
  padding: 2px 14px;
  border-radius: 50px;
}
.news-item .news-time { font-size: 13px; color: var(--text-light); }
.news-item h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.news-item h3 a { color: var(--text); }
.news-item h3 a:hover { color: var(--secondary); }
.news-item p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 8px; }
.news-item .news-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-item .news-link:hover { gap: 8px; }
.news-empty {
  text-align: center;
  padding: 40px;
  color: var(--text-light);
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 16px;
}

/* ===== Stats ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.stat-card .stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--secondary);
  line-height: 1.1;
  margin-bottom: 4px;
}
.stat-card .stat-label { font-size: 15px; color: var(--text-light); font-weight: 500; }
.stat-card .stat-icon {
  font-size: 28px;
  color: rgba(212,165,74,0.2);
  margin-bottom: 12px;
}

/* ===== How It Works ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  position: relative;
  transition: var(--transition);
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.step-card .step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step-card h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.step-card p { font-size: 14px; color: var(--text-light); 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-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(212,165,74,0.2); }
.faq-item .faq-q {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  user-select: none;
}
.faq-item .faq-q:hover { color: var(--secondary); }
.faq-item .faq-q i { transition: var(--transition); color: var(--text-light); font-size: 14px; }
.faq-item.active .faq-q i { transform: rotate(180deg); color: var(--secondary); }
.faq-item .faq-a {
  padding: 0 24px 18px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
  display: none;
}
.faq-item.active .faq-a { display: block; }

/* ===== CTA ===== */
.cta-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
  padding: 80px 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08;
}
.cta-content { position: relative; z-index: 2; text-align: center; max-width: 640px; margin: 0 auto; }
.cta-content h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
}
.cta-content p {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 28px;
  line-height: 1.7;
}
.cta-content .btn-primary { font-size: 18px; padding: 16px 40px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.6);
  padding: 48px 0 32px;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}
.footer-brand .footer-logo span { color: var(--secondary); }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--secondary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--secondary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .events-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 38px; }
}

@media (max-width: 768px) {
  :root { --nav-width: 0px; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-header { display: flex; }
  .overlay.show { display: block; }
  .main-content { margin-left: 0; padding-top: 60px; }
  .hero { min-height: 420px; padding: 60px 20px 40px; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 16px; }
  .section { padding: 48px 0; }
  .section-header h2 { font-size: 26px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .events-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .news-item { flex-direction: column; padding: 16px; }
  .news-item .news-img { width: 100%; height: 180px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .cta-content h2 { font-size: 28px; }
  .mobile-header .menu-btn { display: flex; }
  .feature-card { padding: 24px 20px; }
}

@media (max-width: 520px) {
  .features-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .events-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .section-header h2 { font-size: 22px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .news-item .news-img { height: 140px; }
}

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.anim-fade-up { animation: fadeUp 0.6s ease forwards; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }

/* ===== Selection ===== */
::selection { background: rgba(212,165,74,0.25); color: var(--text); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --success: #2a9d8f;
            --bg: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1d3557;
            --bg-footer: #0d1b2a;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
            --shadow-sidebar: 2px 0 30px rgba(0, 0, 0, 0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --container-max: 1200px;
            --gap: 32px;
        }

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

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

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }

        .container {
            max-width: var(--container-max);
            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(--bg-card);
            border-right: 1px solid var(--border);
            box-shadow: var(--shadow-sidebar);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 28px 0 20px;
            overflow-y: auto;
            transition: transform var(--transition);
        }

        .sidebar-logo {
            padding: 0 24px 24px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
        }
        .sidebar-logo .logo-text {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--secondary);
        }
        .sidebar-logo .logo-text span {
            color: var(--primary);
        }
        .sidebar-logo .logo-sub {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 2px;
            letter-spacing: 1px;
        }

        .sidebar-nav {
            flex: 1;
            padding: 0 12px;
        }
        .nav-section {
            margin-bottom: 16px;
        }
        .nav-section-title {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--text-light);
            padding: 8px 12px 6px;
            font-weight: 600;
        }
        .nav-section a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }
        .nav-section a i {
            width: 20px;
            text-align: center;
            color: var(--text-light);
            transition: var(--transition);
        }
        .nav-section a:hover {
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
        }
        .nav-section a:hover i {
            color: var(--primary);
        }
        .nav-section a.active {
            background: rgba(230, 57, 70, 0.1);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-section a.active i {
            color: var(--primary);
        }

        .sidebar-footer-nav {
            padding: 16px 12px 0;
            border-top: 1px solid var(--border);
            margin-top: auto;
        }
        .sidebar-footer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .sidebar-footer-nav a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }

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

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .mobile-header .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .mobile-header .logo-text span {
            color: var(--primary);
        }
        .mobile-toggle {
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: 4px 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 12px;
        }
        .page-banner h1 span {
            color: var(--primary-light);
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 640px;
            line-height: 1.7;
        }
        .page-banner .banner-meta {
            display: flex;
            gap: 24px;
            margin-top: 20px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        .page-banner .banner-meta i {
            margin-right: 6px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 60px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            border-radius: 2px;
            background: var(--primary);
            margin: 12px auto 0;
        }
        .section-header p {
            color: var(--text-light);
            max-width: 540px;
            margin: 12px auto 0;
            font-size: 1.05rem;
        }

        /* ===== Filter Tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 36px;
        }
        .filter-tabs .tab-btn {
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 2px solid var(--border);
            background: var(--bg-card);
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tabs .tab-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
        }
        .filter-tabs .tab-btn.active {
            border-color: var(--primary);
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== Event Cards Grid ===== */
        .event-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: var(--gap);
        }
        .event-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .event-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .event-card .card-image {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: var(--secondary);
        }
        .event-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .event-card:hover .card-image img {
            transform: scale(1.05);
        }
        .event-card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: var(--text-white);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            box-shadow: 0 2px 10px rgba(230, 57, 70, 0.3);
        }
        .event-card .card-badge.hot {
            background: var(--accent);
        }
        .event-card .card-badge.new {
            background: var(--success);
        }
        .event-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .event-card .card-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .event-card .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .event-card .card-title a {
            color: inherit;
        }
        .event-card .card-title a:hover {
            color: var(--primary);
        }
        .event-card .card-meta {
            display: flex;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .event-card .card-meta i {
            margin-right: 4px;
            width: 16px;
        }
        .event-card .card-excerpt {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .event-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .event-card .card-footer .read-more {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .event-card .card-footer .read-more:hover {
            gap: 10px;
        }
        .event-card .card-footer .stats {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            gap: 12px;
        }
        .event-card .card-footer .stats i {
            margin-right: 3px;
        }

        /* ===== Featured Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 40px;
        }
        .featured-card .featured-image {
            height: 100%;
            min-height: 320px;
            background: var(--secondary);
            position: relative;
        }
        .featured-card .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .featured-card .featured-image .featured-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--primary);
            color: #fff;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
        }
        .featured-card .featured-body {
            padding: 36px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-card .featured-body .category-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 8px;
        }
        .featured-card .featured-body h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .featured-card .featured-body p {
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .featured-card .featured-body .meta-line {
            display: flex;
            gap: 20px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .featured-card .featured-body .btn-primary {
            align-self: flex-start;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--primary);
            color: var(--text-white);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
            color: var(--text-white);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Stats / Data Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 6px;
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 1.8rem;
            color: var(--secondary-light);
            margin-bottom: 10px;
        }

        /* ===== Timeline ===== */
        .timeline {
            position: relative;
            padding-left: 40px;
            margin: 20px 0 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--secondary-light));
            border-radius: 3px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 28px 24px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg-card);
            box-shadow: 0 0 0 3px var(--primary-light);
        }
        .timeline-item .time {
            font-size: 0.8rem;
            color: var(--text-light);
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .timeline-item h4 {
            font-size: 1.05rem;
            margin: 4px 0 4px;
        }
        .timeline-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--text-light);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            padding: 70px 0;
            text-align: center;
            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-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-primary {
            background: var(--text-white);
            color: var(--secondary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .cta-section .btn-primary:hover {
            background: var(--primary-light);
            color: var(--text-white);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo span {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Pagination ===== */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text);
            transition: var(--transition);
        }
        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }
        .pagination .active {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--text-white);
        }
        .pagination .ellipsis {
            border: none;
            background: none;
            width: auto;
            padding: 0 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .featured-card {
                grid-template-columns: 1fr;
            }
            .featured-card .featured-image {
                min-height: 240px;
            }
            .featured-card .featured-image img {
                position: relative;
            }
            .featured-card .featured-body {
                padding: 28px 32px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .page-banner {
                padding: 60px 0 40px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .page-banner .banner-meta {
                flex-wrap: wrap;
                gap: 12px;
            }
            .section {
                padding: 40px 0;
            }
            .event-grid {
                grid-template-columns: 1fr;
            }
            .featured-card .featured-body {
                padding: 24px;
            }
            .featured-card .featured-body h3 {
                font-size: 1.3rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .filter-tabs {
                gap: 8px;
            }
            .filter-tabs .tab-btn {
                padding: 6px 16px;
                font-size: 0.8rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .stats-row {
                grid-template-columns: 1fr;
            }
            .event-card .card-body {
                padding: 16px 18px 18px;
            }
            .event-card .card-image {
                height: 170px;
            }
            .pagination a,
            .pagination span {
                width: 36px;
                height: 36px;
                font-size: 0.8rem;
            }
            .featured-card .featured-body {
                padding: 18px;
            }
            .featured-card .featured-body h3 {
                font-size: 1.1rem;
            }
            .section-header h2::after {
                width: 36px;
            }
            .mobile-header .logo-text {
                font-size: 1.1rem;
            }
        }

        /* ===== Overlay for mobile ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.active {
            display: block;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

/* roulang page: article */
:root {
  --primary: #1e2a4a;
  --primary-light: #2c3e6b;
  --primary-dark: #0f1629;
  --accent: #e8491d;
  --accent-hover: #d03d15;
  --accent-light: #f55a2e;
  --gold: #f0c040;
  --gold-light: #f5d470;
  --bg: #f5f6fa;
  --bg-card: #ffffff;
  --bg-sidebar: #141c2b;
  --bg-sidebar-hover: #1e2a3f;
  --bg-dark: #0f1420;
  --text: #2d3436;
  --text-light: #636e72;
  --text-white: #f1f2f6;
  --text-muted: #b2bec3;
  --border: #e0e4ec;
  --border-light: #edf0f5;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-w: 240px;
  --header-h: 0px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-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-hover)}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;color:var(--primary);font-weight:700}
h1{font-size:2.5rem;letter-spacing:-0.02em}
h2{font-size:1.8rem;letter-spacing:-0.01em}
h3{font-size:1.3rem}
h4{font-size:1.1rem}
p{margin-bottom:1rem}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* === Layout === */
.app-layout{display:flex;min-height:100vh}
.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;background:var(--bg-sidebar);z-index:1000;display:flex;flex-direction:column;overflow-y:auto;transition:transform var(--transition);border-right:1px solid rgba(255,255,255,0.04)}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:24px 20px 20px;border-bottom:1px solid rgba(255,255,255,0.06)}
.sidebar-brand .logo-text{font-size:1.5rem;font-weight:800;color:var(--text-white);letter-spacing:-0.02em}
.sidebar-brand .logo-text span{color:var(--gold)}
.sidebar-nav{padding:16px 12px;flex:1}
.nav-section{margin-bottom:8px}
.nav-section-title{font-size:0.7rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-muted);padding:8px 12px 6px;font-weight:600;opacity:0.6}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-sm);color:var(--text-white);font-size:0.92rem;font-weight:500;transition:all var(--transition);margin-bottom:2px;opacity:0.75}
.sidebar-nav a i{width:20px;text-align:center;font-size:1rem;color:var(--text-muted);transition:color var(--transition)}
.sidebar-nav a:hover{background:var(--bg-sidebar-hover);opacity:1;color:var(--text-white)}
.sidebar-nav a:hover i{color:var(--gold)}
.sidebar-nav a.active{background:var(--accent);opacity:1;color:#fff;box-shadow:0 4px 12px rgba(232,73,29,0.3)}
.sidebar-nav a.active i{color:#fff}
.main-content{flex:1;margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0}
  .mobile-header{display:flex!important}
}

/* === Mobile Header === */
.mobile-header{display:none;position:sticky;top:0;z-index:999;background:var(--bg-sidebar);padding:12px 16px;align-items:center;justify-content:space-between;box-shadow:0 2px 12px rgba(0,0,0,0.15)}
.mobile-header .logo-text{font-size:1.3rem;font-weight:800;color:var(--text-white)}
.mobile-header .logo-text span{color:var(--gold)}
.mobile-header .menu-btn{background:none;border:none;color:var(--text-white);font-size:1.5rem;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:background var(--transition)}
.mobile-header .menu-btn:hover{background:var(--bg-sidebar-hover)}
.overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:999;opacity:0;pointer-events:none;transition:opacity var(--transition)}
.overlay.show{opacity:1;pointer-events:auto}

/* === Hero / Article Banner === */
.article-banner{position:relative;padding:80px 0 60px;background:var(--primary-dark);overflow:hidden}
.article-banner .bg-img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:0.25;pointer-events:none}
.article-banner .overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(20,28,43,0.92) 0%,rgba(30,42,74,0.7) 100%);pointer-events:none}
.article-banner .container{position:relative;z-index:2}
.article-banner .breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-size:0.85rem;color:var(--text-muted)}
.article-banner .breadcrumb a{color:var(--gold);opacity:0.8}
.article-banner .breadcrumb a:hover{opacity:1}
.article-banner .breadcrumb span{color:var(--text-muted)}
.article-banner .article-category{display:inline-block;background:var(--accent);color:#fff;padding:4px 16px;border-radius:20px;font-size:0.8rem;font-weight:600;letter-spacing:0.03em;margin-bottom:16px}
.article-banner h1{color:var(--text-white);font-size:2.2rem;max-width:800px;line-height:1.3;margin-bottom:20px}
.article-banner .article-meta{display:flex;flex-wrap:wrap;gap:16px 24px;color:var(--text-muted);font-size:0.88rem}
.article-banner .article-meta i{margin-right:6px;color:var(--gold);opacity:0.7}

/* === Article Content === */
.article-section{padding:50px 0 40px}
.article-body{max-width:820px;margin:0 auto}
.article-body .content{font-size:1.05rem;line-height:1.9;color:var(--text)}
.article-body .content p{margin-bottom:1.4em}
.article-body .content h2,.article-body .content h3{margin-top:1.8em;margin-bottom:0.6em;color:var(--primary)}
.article-body .content ul,.article-body .content ol{margin-bottom:1.4em;padding-left:1.8em}
.article-body .content li{margin-bottom:0.4em;list-style:disc}
.article-body .content ol li{list-style:decimal}
.article-body .content img{border-radius:var(--radius);margin:1.5em 0;box-shadow:var(--shadow)}
.article-body .content blockquote{border-left:4px solid var(--accent);padding:12px 20px;margin:1.5em 0;background:var(--bg);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic}
.article-body .content a{color:var(--accent);border-bottom:1px solid transparent}
.article-body .content a:hover{border-bottom-color:var(--accent)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding-top:28px;border-top:1px solid var(--border)}
.article-tags .tag{display:inline-block;background:var(--bg);border:1px solid var(--border);padding:5px 16px;border-radius:20px;font-size:0.82rem;color:var(--text-light);transition:all var(--transition)}
.article-tags .tag:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

/* === Article Navigation === */
.article-nav{padding:24px 0 40px}
.article-nav .nav-links{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;max-width:820px;margin:0 auto}
.article-nav .nav-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:0.92rem;font-weight:500;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.article-nav .nav-btn:hover{background:var(--primary);color:var(--text-white);border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow)}
.article-nav .nav-btn i{font-size:0.9rem}

/* === Related Posts === */
.related-section{padding:50px 0;background:var(--bg-card);border-top:1px solid var(--border-light)}
.related-section .section-title{text-align:center;margin-bottom:36px}
.related-section .section-title h2{font-size:1.6rem;color:var(--primary)}
.related-section .section-title p{color:var(--text-light);font-size:0.95rem;margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px;max-width:1100px;margin:0 auto}
.related-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-light);transition:all var(--transition);box-shadow:var(--shadow-sm)}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.related-card .card-img{width:100%;height:180px;object-fit:cover;display:block}
.related-card .card-body{padding:18px 20px 20px}
.related-card .card-category{display:inline-block;font-size:0.72rem;color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:0.04em;margin-bottom:6px}
.related-card .card-title{font-size:1.05rem;font-weight:600;color:var(--primary);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-meta{font-size:0.8rem;color:var(--text-muted);display:flex;align-items:center;gap:12px}

/* === CTA === */
.cta-section{padding:60px 0;background:var(--primary);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:url('/assets/images/backpic/back-2.png') center/cover;opacity:0.08;pointer-events:none}
.cta-section .container{position:relative;z-index:2;text-align:center}
.cta-section h2{color:var(--text-white);font-size:1.8rem;margin-bottom:12px}
.cta-section p{color:var(--text-muted);font-size:1.05rem;max-width:600px;margin:0 auto 28px}
.cta-section .cta-btn{display:inline-flex;align-items:center;gap:10px;background:var(--gold);color:var(--primary);padding:14px 36px;border-radius:50px;font-size:1.05rem;font-weight:700;transition:all var(--transition);box-shadow:0 6px 20px rgba(240,192,64,0.3)}
.cta-section .cta-btn:hover{background:var(--gold-light);transform:translateY(-3px);box-shadow:0 10px 30px rgba(240,192,64,0.4);color:var(--primary-dark)}

/* === Footer === */
.site-footer{background:var(--bg-sidebar);color:var(--text-muted);padding:50px 0 0}
.site-footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.06)}
.site-footer .footer-logo{font-size:1.5rem;font-weight:800;color:var(--text-white);margin-bottom:12px}
.site-footer .footer-logo span{color:var(--gold)}
.site-footer p{font-size:0.88rem;line-height:1.7;color:var(--text-muted);max-width:360px}
.site-footer .footer-col h4{font-size:0.9rem;font-weight:600;color:var(--text-white);margin-bottom:16px;letter-spacing:0.02em}
.site-footer .footer-col a{display:block;color:var(--text-muted);font-size:0.85rem;padding:5px 0;transition:all var(--transition)}
.site-footer .footer-col a:hover{color:var(--gold);padding-left:4px}
.site-footer .footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:20px 0;font-size:0.82rem;color:var(--text-muted);gap:12px}
.site-footer .footer-bottom a{color:var(--gold);opacity:0.8}
.site-footer .footer-bottom a:hover{opacity:1}
@media(max-width:768px){
  .site-footer .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer .footer-brand{grid-column:1/-1}
  .site-footer .footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:520px){
  .site-footer .footer-grid{grid-template-columns:1fr}
}

/* === Not Found === */
.not-found{padding:80px 0;text-align:center}
.not-found .icon{font-size:4rem;color:var(--text-muted);margin-bottom:20px}
.not-found h2{font-size:1.6rem;color:var(--primary);margin-bottom:12px}
.not-found p{color:var(--text-light);margin-bottom:24px}
.not-found .back-btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;transition:all var(--transition)}
.not-found .back-btn:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:var(--shadow)}

/* === Empty State === */
.empty-state{padding:60px 20px;text-align:center;color:var(--text-light)}
.empty-state i{font-size:3rem;color:var(--text-muted);margin-bottom:16px}
.empty-state p{font-size:1rem}

/* === Utility === */
.text-center{text-align:center}
.mt-1{margin-top:12px}
.mb-1{margin-bottom:12px}

/* === Responsive === */
@media(max-width:1024px){
  .article-banner{padding:60px 0 40px}
  .article-banner h1{font-size:1.8rem}
  .related-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
}
@media(max-width:768px){
  .article-banner h1{font-size:1.5rem}
  .article-body .content{font-size:1rem}
  .article-nav .nav-links{flex-direction:column;align-items:stretch}
  .article-nav .nav-btn{justify-content:center}
  .related-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .article-banner{padding:40px 0 30px}
  .article-banner h1{font-size:1.3rem}
  .article-banner .article-meta{flex-direction:column;gap:8px}
  .related-grid{grid-template-columns:1fr}
  .cta-section h2{font-size:1.4rem}
}