/* UI Style 7 - Modern Blue Theme */

:root {
  --primary: #3498db;
  --secondary: #2c3e50;
  --accent: #e74c3c;
  --bg-light: #ecf0f1;
  --text-dark: #2c3e50;
  --border: #bdc3c7;
}

body.ui-style-7 {
  font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
}

body.ui-style-7 header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
}

body.ui-style-7 .logo {
  color: #fff;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

body.ui-style-7 nav a {
  color: #fff;
  font-weight: 500;
}

body.ui-style-7 nav a:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

body.ui-style-7 .hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.ui-style-7 .video-card,
body.ui-style-7 .list-item,
body.ui-style-7 .latest-card {
  border-left: 3px solid var(--primary);
}

body.ui-style-7 .video-card:hover,
body.ui-style-7 .list-item:hover,
body.ui-style-7 .latest-card:hover {
  border-left-color: var(--accent);
}

body.ui-style-7 .more-link {
  background: var(--primary);
  box-shadow: 0 4px 6px rgba(52, 152, 219, 0.3);
}

body.ui-style-7 .more-link:hover {
  background: var(--secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(44, 62, 80, 0.3);
}

body.ui-style-7 .section h2 {
  border-left-color: var(--primary);
  color: var(--secondary);
}

body.ui-style-7 .detail-container {
  border-top: 4px solid var(--primary);
}

body.ui-style-7 .info-item {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-left: 2px solid var(--primary);
}

body.ui-style-7 .related-card {
  border: 2px solid var(--border);
  transition: all 0.3s ease;
}

body.ui-style-7 .related-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 20px rgba(52, 152, 219, 0.2);
}

body.ui-style-7 .ranking-item {
  border-left: 3px solid transparent;
}

body.ui-style-7 .ranking-item:hover {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(231, 76, 60, 0.05) 0%, transparent 100%);
}

body.ui-style-7 .rank-number {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.ui-style-7 .topic-section {
  border-top: 3px solid var(--primary);
}

body.ui-style-7 .topic-item {
  background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
  border-left: 2px solid var(--primary);
}

body.ui-style-7 .topic-item:hover {
  background: linear-gradient(135deg, #bbdefb 0%, #90caf9 100%);
  transform: translateX(5px);
}

/* Responsive enhancements */
@media (max-width: 768px) {
  body.ui-style-7 .hero h1 {
    font-size: 24px;
  }

  body.ui-style-7 .section h2 {
    font-size: 22px;
  }

  body.ui-style-7 .video-grid,
  body.ui-style-7 .latest-grid {
    grid-template-columns: 1fr;
  }
}

/* Animation enhancements */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body.ui-style-7 .video-card,
body.ui-style-7 .list-item,
body.ui-style-7 .latest-card {
  animation: fadeInUp 0.5s ease-out;
}

/* Scroll behavior */
html {
  scroll-behavior: smooth;
}