:root {
  --primary: #0099FF;
  --secondary: #FF6700;
  --text-primary: #1a1a1a;
  --text-secondary: #666;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --border-color: #e0e0e0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --radius-sm: 4px;
  --radius-md: 8px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
}

.ui-style-11 {
  --primary: #0099FF;
  --secondary: #FF6700;
}

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

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

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

.site-header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: nowrap;
}

.site-nav a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.site-nav a:hover {
  background: var(--bg-secondary);
  color: var(--primary);
}

.site-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-sm);
}

.section-hot,
.section-top,
.section-latest {
  margin-bottom: var(--spacing-xl);
}

.section-hot h2,
.section-top h2,
.section-latest h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-weight: 600;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.video-card {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.video-cover {
  position: relative;
  width: 100%;
  padding-top: 150%;
  background: var(--bg-secondary);
  overflow: hidden;
}

.video-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-info {
  padding: var(--spacing-sm);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.video-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.video-one-line {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.page-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 700;
}

.page-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.video-list-section {
  margin-bottom: var(--spacing-xl);
}

.video-player-section {
  margin-bottom: var(--spacing-xl);
}

.video-player {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
}

.video-player-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.player-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.player-play-btn:hover {
  transform: translate(-50%, -50%) scale(1.1);
  background: rgba(255, 255, 255, 1);
}

.player-play-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-left: 4px;
}

.video-detail-header {
  margin-bottom: var(--spacing-lg);
}

.video-detail-header h1 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.video-detail-info {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.video-detail-info h2 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-sm);
}

.info-item {
  display: flex;
  gap: var(--spacing-xs);
}

.info-label {
  font-weight: 600;
  color: var(--text-primary);
}

.info-value {
  color: var(--text-secondary);
}

.video-detail-section {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.video-detail-section h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 600;
}

.video-detail-section p {
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.related-videos {
  margin-top: var(--spacing-xl);
}

.related-videos h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
  color: var(--text-secondary);
}

.site-intro {
  background: var(--bg-secondary);
  padding: var(--spacing-xl) var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.site-intro h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-weight: 700;
}

.site-intro p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 900px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .site-nav {
    width: 100%;
    justify-content: space-around;
    gap: 0.25rem;
  }

  .site-nav a {
    padding: var(--spacing-xs) 0.5rem;
    font-size: 0.875rem;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-sm);
  }

  .video-cover {
    padding-top: 150%;
  }

  .video-info {
    padding: var(--spacing-xs);
  }

  .video-title {
    font-size: 0.9375rem;
  }

  .page-header h1 {
    font-size: 1.75rem;
  }

  .page-header p {
    font-size: 1rem;
  }

  .site-intro h1 {
    font-size: 1.75rem;
  }

  .site-intro p {
    font-size: 1rem;
  }

  .player-play-btn {
    width: 60px;
    height: 60px;
  }

  .player-play-icon {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .site-nav a {
    font-size: 0.8125rem;
    padding: 0.375rem 0.375rem;
  }

  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}