/* 全局样式 */
body {
  min-height: 100vh;
}

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

/* 首页 Hero */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 60px 40px;
  border-radius: 12px;
  margin-bottom: 40px;
  text-align: center;
}

.hero h1 {
  font-size: 2em;
  margin-bottom: 20px;
  line-height: 1.3;
}

.hero .intro {
  font-size: 1.1em;
  line-height: 1.8;
  opacity: 0.95;
}

/* 模块 */
.module {
  background: white;
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.module h2 {
  font-size: 1.8em;
  margin-bottom: 20px;
  color: #1a1a1a;
  border-left: 4px solid #667eea;
  padding-left: 15px;
}

.module p {
  margin-bottom: 20px;
  color: #666;
}

.module a {
  color: #667eea;
  text-decoration: underline;
}

/* 视频网格 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.video-card {
  background: #fafafa;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.video-card .rank {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #ff6b6b;
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85em;
  font-weight: bold;
}

.video-card h3 {
  font-size: 1.3em;
  margin-bottom: 10px;
  color: #1a1a1a;
}

.video-card h3 a {
  color: inherit;
  transition: color 0.3s;
}

.video-card h3 a:hover {
  color: #667eea;
}

.video-card .meta {
  font-size: 0.9em;
  color: #999;
  margin-bottom: 10px;
}

.video-card .desc {
  font-size: 0.95em;
  color: #666;
  line-height: 1.6;
}

/* 列表页 */
.list-page {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.list-page h1 {
  font-size: 2em;
  margin-bottom: 15px;
  color: #1a1a1a;
}

.list-page .page-desc {
  font-size: 1.05em;
  color: #666;
  margin-bottom: 30px;
  line-height: 1.8;
}

.video-list {
  display: grid;
  gap: 20px;
}

/* 详情页 */
.detail {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.detail h1 {
  font-size: 2.2em;
  margin-bottom: 30px;
  color: #1a1a1a;
  border-bottom: 3px solid #667eea;
  padding-bottom: 15px;
}

.detail h2 {
  font-size: 1.6em;
  margin: 30px 0 15px;
  color: #333;
}

.detail section {
  margin-bottom: 30px;
}

.info p {
  margin-bottom: 10px;
  font-size: 1.05em;
  line-height: 1.8;
}

.info strong {
  color: #555;
  min-width: 80px;
  display: inline-block;
}

.highlight {
  background: #f0f4ff;
  padding: 20px;
  border-radius: 8px;
  border-left: 4px solid #667eea;
}

.highlight p {
  font-size: 1.15em;
  color: #444;
  line-height: 1.8;
}

.summary p, .review p {
  font-size: 1.05em;
  line-height: 1.9;
  color: #444;
  text-align: justify;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.related-item {
  background: #fafafa;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
  transition: transform 0.3s;
}

.related-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.related-item h4 {
  font-size: 1.2em;
  margin-bottom: 10px;
}

.related-item h4 a {
  color: #1a1a1a;
  transition: color 0.3s;
}

.related-item h4 a:hover {
  color: #667eea;
}

.related-item p {
  font-size: 0.95em;
  color: #666;
  line-height: 1.6;
}

/* 响应式 */
@media (max-width: 768px) {
  main {
    padding: 15px;
  }

  .hero {
    padding: 40px 20px;
  }

  .hero h1 {
    font-size: 1.5em;
  }

  .module, .list-page, .detail {
    padding: 20px;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .related-list {
    grid-template-columns: 1fr;
  }
}

/* UI 风格变体 */
.ui-style-0 { --primary: #667eea; }
.ui-style-1 { --primary: #f093fb; }
.ui-style-2 { --primary: #4facfe; }
.ui-style-3 { --primary: #43e97b; }
.ui-style-4 { --primary: #fa709a; }
.ui-style-5 { --primary: #30cfd0; }
.ui-style-6 { --primary: #a8edea; }
.ui-style-7 { --primary: #ff9a9e; }
.ui-style-8 { --primary: #fbc2eb; }
.ui-style-9 { --primary: #ffecd2; }
.ui-style-10 { --primary: #fcb69f; }
.ui-style-11 { --primary: #ffeaa7; }
.ui-style-12 { --primary: #dfe6e9; }
.ui-style-13 { --primary: #74b9ff; }
.ui-style-14 { --primary: #fd79a8; }
.ui-style-15 { --primary: #fdcb6e; }