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

:root {
  --gold: #ffd700;
  --gold-dark: #e6c200;
  --cyan: #00d9ff;
  --dark-1: #0a0a14;
  --dark-2: #1a1a2e;
  --dark-3: #16213e;
  --dark-4: #0f3460;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --success: #00ff88;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, var(--dark-2) 0%, var(--dark-3) 50%, var(--dark-4) 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  padding: 0 20px;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gold);
  text-decoration: none;
}

.nav-logo-icon {
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 10px 18px;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-dropdown > a::after {
  content: '▾';
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.nav-dropdown:hover > a::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: rgba(10, 10, 20, 0.98);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  list-style: none;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.dropdown-menu a:hover {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

/* Dropdown Category Headers */
.dropdown-category {
  display: block;
  padding: 8px 20px 4px;
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-top: 1px solid var(--card-border);
  margin-top: 4px;
}

.dropdown-category:first-child {
  border-top: none;
  margin-top: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

.lang-toggle {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 20px 60px;
  background: linear-gradient(135deg, rgba(10, 10, 20, 0.5) 0%, rgba(15, 52, 96, 0.4) 100%),
              url('../images/hero-bg.jpg') center/cover fixed;
}

.hero.no-image {
  background: linear-gradient(135deg, var(--dark-2) 0%, var(--dark-3) 50%, var(--dark-4) 100%);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--dark-2));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: 16px;
  color: var(--gold);
  text-shadow: 0 4px 30px rgba(255, 215, 0, 0.4);
  letter-spacing: 3px;
  font-weight: 800;
}

.hero .subtitle {
  font-size: 1.6rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 300;
}

.hero .subtitle-cn {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border: none;
  border-radius: 30px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
  color: #000;
}

.btn-primary:hover {
  box-shadow: 0 10px 30px rgba(255, 215, 0, 0.4);
  color: #000;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 2px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* Quick Nav Cards */
.quick-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: -80px auto 60px;
  max-width: 1000px;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.nav-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 30px 20px;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
  cursor: pointer;
}

.nav-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.nav-card-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.nav-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 6px;
}

.nav-card-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 80px 20px;
}

.section-dark {
  background: var(--dark-1);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--gold);
  margin-bottom: 16px;
}

.section-title p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Feature Cards */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px 30px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.3rem;
  color: var(--cyan);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.about-text h3 {
  font-size: 1.8rem;
  color: var(--gold);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Footer */
.footer {
  background: var(--dark-1);
  padding: 60px 20px 30px;
  border-top: 1px solid var(--card-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto 40px;
}

.footer-brand h3 {
  font-size: 1.5rem;
  color: var(--gold);
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-links h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Page Header */
.page-header {
  padding: 140px 20px 60px;
  text-align: center;
  background: linear-gradient(135deg, rgba(10, 10, 20, 0.95) 0%, rgba(15, 52, 96, 0.9) 100%);
}

.page-header h1 {
  font-size: 3rem;
  color: var(--gold);
  margin-bottom: 16px;
}

.page-header p {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

/* Content Sections */
.content-section {
  padding: 60px 20px;
}

.content-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.content-card h3 {
  font-size: 1.5rem;
  color: var(--cyan);
  margin-bottom: 20px;
}

.content-card p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.content-card ul {
  color: var(--text-secondary);
  margin-left: 20px;
  margin-bottom: 16px;
}

.content-card li {
  margin-bottom: 8px;
}

/* Portal Embed */
.portal-embed {
  width: 100%;
  min-height: 800px;
  border: none;
  border-radius: 20px;
  background: var(--card-bg);
}

/* Responsive */
@media (max-width: 900px) {
  .quick-nav {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -60px;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .navbar .container {
    position: relative;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 20, 0.98);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--card-border);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: block;
  }
  
  /* Mobile dropdown */
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0 0 0 20px;
    display: none;
  }
  
  .nav-dropdown.open .dropdown-menu {
    display: block;
  }
  
  .nav-dropdown > a::after {
    content: '▸';
  }
  
  .nav-dropdown.open > a::after {
    content: '▾';
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero .subtitle {
    font-size: 1.2rem;
  }
  
  .page-header h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .quick-nav {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

/* Admin links - hidden by default */
.admin-link {
  display: none !important;
}
.admin-link.show {
  display: block !important;
}