.container { max-width: 1200px; margin: 0 auto; padding: 40px 20px; }
.hero { text-align: center; margin-bottom: 60px; padding: 60px 20px; background: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.hero h1 { font-size: 28px; color: #2c3e50; margin-bottom: 20px; line-height: 1.4; }
.hero .intro { font-size: 16px; color: #666; line-height: 1.8; max-width: 800px; margin: 0 auto; }
.hero .intro a { color: #3498db; text-decoration: underline; }

section { margin-bottom: 50px; }
section h2 { font-size: 24px; color: #2c3e50; margin-bottom: 25px; padding-bottom: 10px; border-bottom: 2px solid #3498db; }

.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.video-card { background: #fff; padding: 20px; border-radius: 6px; box-shadow: 0 2px 6px rgba(0,0,0,0.06); transition: transform 0.2s, box-shadow 0.2s; }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.video-card h3 { font-size: 18px; margin-bottom: 10px; }
.video-card h3 a { color: #2c3e50; }
.video-card h3 a:hover { color: #3498db; }
.video-card .meta { font-size: 13px; color: #999; margin-bottom: 8px; }
.video-card .tags { font-size: 12px; color: #666; margin-bottom: 10px; }
.video-card .oneline { font-size: 14px; color: #555; line-height: 1.6; }

.topic-list { display: grid; gap: 20px; }
.topic-item { background: #fff; padding: 20px; border-radius: 6px; border-left: 4px solid #e74c3c; }
.topic-item h3 { font-size: 18px; margin-bottom: 10px; }
.topic-item h3 a { color: #2c3e50; }
.topic-item h3 a:hover { color: #e74c3c; }
.topic-item p { font-size: 14px; color: #666; line-height: 1.6; }

.latest-list { background: #fff; padding: 30px; border-radius: 6px; }
.latest-list li { padding: 15px 0; border-bottom: 1px solid #eee; display: flex; justify-content: space-between; align-items: center; }
.latest-list li:last-child { border-bottom: none; }
.latest-list a { font-size: 16px; color: #2c3e50; flex: 1; }
.latest-list a:hover { color: #3498db; }
.latest-list .year { font-size: 14px; color: #999; }

.more-link { text-align: right; margin-top: 15px; }
.more-link a { color: #3498db; font-size: 15px; }
.more-link a:hover { text-decoration: underline; }

.all-link { text-align: center; padding: 30px; background: #fff; border-radius: 6px; }
.all-link a { font-size: 16px; color: #2ecc71; font-weight: bold; }
.all-link a:hover { text-decoration: underline; }

.list-page .page-intro { font-size: 15px; color: #666; line-height: 1.8; margin-bottom: 30px; padding: 20px; background: #fff; border-radius: 6px; }
.list-content { display: grid; gap: 20px; }
.list-item { background: #fff; padding: 25px; border-radius: 6px; box-shadow: 0 2px 6px rgba(0,0,0,0.06); display: flex; gap: 15px; }
.list-item .rank { font-size: 28px; font-weight: bold; color: #e74c3c; min-width: 60px; }
.list-item .date { font-size: 14px; color: #3498db; font-weight: bold; min-width: 60px; }
.list-item .item-main { flex: 1; }
.list-item h2 { font-size: 20px; margin-bottom: 10px; }
.list-item h2 a { color: #2c3e50; }
.list-item h2 a:hover { color: #3498db; }
.list-item .meta { font-size: 13px; color: #999; margin-bottom: 8px; }
.list-item .tags { font-size: 12px; color: #666; margin-bottom: 10px; }
.list-item .summary { font-size: 14px; color: #555; line-height: 1.6; margin-bottom: 8px; }
.list-item .review { font-size: 14px; color: #777; line-height: 1.6; font-style: italic; border-left: 3px solid #3498db; padding-left: 12px; }

.detail-page article { background: #fff; padding: 40px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.detail-page h1 { font-size: 32px; color: #2c3e50; margin-bottom: 30px; border-bottom: 3px solid #3498db; padding-bottom: 15px; }
.detail-page section { margin-bottom: 30px; }
.detail-page section h2 { font-size: 20px; color: #34495e; margin-bottom: 15px; border-bottom: 1px solid #ddd; padding-bottom: 8px; }
.info-list { display: grid; gap: 10px; }
.info-list li { font-size: 15px; color: #555; line-height: 1.6; }
.oneline-box p, .summary-box p, .review-box p { font-size: 15px; color: #555; line-height: 1.8; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }
.related-card { padding: 15px; border: 1px solid #e0e0e0; border-radius: 6px; transition: all 0.2s; }
.related-card:hover { border-color: #3498db; box-shadow: 0 2px 6px rgba(52,152,219,0.2); }
.related-card h3 { font-size: 16px; margin-bottom: 8px; }
.related-card h3 a { color: #2c3e50; }
.related-card h3 a:hover { color: #3498db; }
.related-card .meta { font-size: 12px; color: #999; margin-bottom: 6px; }
.related-card .oneline { font-size: 13px; color: #666; line-height: 1.5; }

footer { text-align: center; padding: 30px 20px; color: #999; font-size: 14px; }

nav .active { background: #3498db; color: #fff !important; }

@media (max-width: 768px) {
  .container { padding: 20px 15px; }
  .hero { padding: 40px 15px; margin-bottom: 40px; }
  .hero h1 { font-size: 22px; }
  .hero .intro { font-size: 15px; }
  section h2 { font-size: 20px; }
  .video-grid { grid-template-columns: 1fr; }
  .detail-page article { padding: 25px 15px; }
  .detail-page h1 { font-size: 24px; }
  .related-grid { grid-template-columns: 1fr; }
  .list-item { flex-direction: column; }
  .list-item .rank, .list-item .date { min-width: auto; }
}