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

.hero { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 60px 20px; text-align: center; }
.hero h1 { font-size: 28px; margin-bottom: 20px; }
.hero .intro { font-size: 16px; line-height: 1.8; max-width: 800px; margin: 0 auto; }

section { padding: 40px 0; }
section h2 { font-size: 24px; margin-bottom: 10px; color: #2c3e50; }
.section-desc { color: #666; margin-bottom: 30px; line-height: 1.8; }
.section-desc a { color: #3498db; text-decoration: underline; }

.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.video-card { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: transform 0.3s; }
.video-card:hover { transform: translateY(-5px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.video-card h3, .video-card h4 { font-size: 18px; margin-bottom: 10px; }
.video-card h3 a, .video-card h4 a { color: #2c3e50; }
.video-card h3 a:hover, .video-card h4 a:hover { color: #3498db; }
.video-card .meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; font-size: 13px; color: #666; }
.video-card .meta span { background: #f0f0f0; padding: 2px 8px; border-radius: 3px; }
.video-card p { font-size: 14px; color: #666; line-height: 1.6; }

.video-list .list-item { background: white; padding: 20px; margin-bottom: 15px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.08); }
.video-list .list-item h3, .video-list .list-item h4 { font-size: 18px; margin-bottom: 10px; }
.video-list .list-item h3 a, .video-list .list-item h4 a { color: #2c3e50; }
.video-list .list-item h3 a:hover, .video-list .list-item h4 a:hover { color: #3498db; }
.video-list .list-item .meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; font-size: 13px; color: #666; }
.video-list .list-item .meta span { background: #f0f0f0; padding: 2px 8px; border-radius: 3px; }
.video-list .list-item p { font-size: 14px; color: #666; line-height: 1.6; }

.entry-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.entry-card { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); text-align: center; transition: all 0.3s; }
.entry-card:hover { transform: translateY(-5px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.entry-card h3 { font-size: 20px; margin-bottom: 15px; }
.entry-card h3 a { color: #2c3e50; }
.entry-card h3 a:hover { color: #3498db; }
.entry-card p { font-size: 14px; color: #666; line-height: 1.6; }

.page-header { margin-bottom: 40px; }
.page-header h1 { font-size: 28px; color: #2c3e50; margin-bottom: 15px; }
.page-header .page-desc { font-size: 16px; color: #666; line-height: 1.8; }

.group { margin-bottom: 40px; }
.group-title { font-size: 22px; color: #2c3e50; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid #3498db; }

.ranking-list { background: white; padding: 20px; border-radius: 8px; }
.ranking-item { display: flex; gap: 20px; padding: 20px; border-bottom: 1px solid #f0f0f0; }
.ranking-item:last-child { border-bottom: none; }
.rank-number { font-size: 32px; font-weight: 700; color: #3498db; min-width: 50px; }
.rank-content { flex: 1; }
.rank-content h3 { font-size: 18px; margin-bottom: 10px; }
.rank-content h3 a { color: #2c3e50; }
.rank-content h3 a:hover { color: #3498db; }
.rank-content .meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; font-size: 13px; color: #666; }
.rank-content .meta span { background: #f0f0f0; padding: 2px 8px; border-radius: 3px; }
.rank-content p { font-size: 14px; color: #666; line-height: 1.6; }

.topic-group { margin-bottom: 50px; }
.topic-title { font-size: 22px; color: #2c3e50; margin-bottom: 20px; padding-left: 15px; border-left: 4px solid #3498db; }

.latest-list { background: white; border-radius: 8px; overflow: hidden; }
.latest-item { display: flex; gap: 20px; padding: 20px; border-bottom: 1px solid #f0f0f0; }
.latest-item:last-child { border-bottom: none; }
.latest-date { font-size: 18px; font-weight: 600; color: #3498db; min-width: 80px; }
.latest-content { flex: 1; }
.latest-content h3 { font-size: 18px; margin-bottom: 10px; }
.latest-content h3 a { color: #2c3e50; }
.latest-content h3 a:hover { color: #3498db; }
.latest-content .meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; font-size: 13px; color: #666; }
.latest-content .meta span { background: #f0f0f0; padding: 2px 8px; border-radius: 3px; }
.latest-content .summary { font-size: 14px; color: #666; line-height: 1.6; }

.detail { background: white; padding: 40px; border-radius: 8px; margin-bottom: 40px; }
.detail h1 { font-size: 32px; color: #2c3e50; margin-bottom: 30px; }
.detail-info { background: #f8f9fa; padding: 20px; border-radius: 6px; margin-bottom: 30px; }
.detail-info .info-row { display: flex; padding: 8px 0; border-bottom: 1px solid #e9ecef; }
.detail-info .info-row:last-child { border-bottom: none; }
.detail-info .label { font-weight: 600; color: #495057; min-width: 80px; }
.detail-info span:last-child { color: #666; flex: 1; }
.detail .section { margin-bottom: 30px; }
.detail .section h2 { font-size: 22px; color: #2c3e50; margin-bottom: 15px; }
.detail .highlight { font-size: 16px; color: #3498db; font-weight: 500; line-height: 1.8; padding: 15px; background: #f0f8ff; border-radius: 6px; }
.detail .summary, .detail .review { font-size: 15px; color: #333; line-height: 1.8; }

.related { background: white; padding: 40px; border-radius: 8px; }
.related h2 { font-size: 24px; color: #2c3e50; margin-bottom: 30px; }

footer { background: #2c3e50; color: white; padding: 30px 20px; text-align: center; margin-top: 60px; }
footer p { font-size: 14px; }

nav .active { background: #3498db; color: white; }

@media (max-width: 767px) {
  .hero { padding: 40px 15px; }
  .hero h1 { font-size: 22px; }
  .hero .intro { font-size: 14px; }

  .container { padding: 15px; }
  section { padding: 30px 0; }
  section h2 { font-size: 20px; }

  .video-grid { grid-template-columns: 1fr; gap: 15px; }
  .entry-grid { grid-template-columns: 1fr; }

  .ranking-item { flex-direction: column; gap: 10px; padding: 15px; }
  .rank-number { font-size: 24px; }

  .latest-item { flex-direction: column; gap: 10px; padding: 15px; }
  .latest-date { min-width: auto; }

  .detail { padding: 20px; }
  .detail h1 { font-size: 24px; }
  .detail .section h2 { font-size: 18px; }

  .related { padding: 20px; }
  .related h2 { font-size: 20px; }

  .page-header h1 { font-size: 22px; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
}