.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.main-content { min-height: calc(100vh - 200px); padding: 20px 0; }

.hero { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; padding: 60px 20px; text-align: center; margin-bottom: 40px; }
.hero-title { font-size: 32px; margin-bottom: 20px; line-height: 1.4; }
.hero-desc { font-size: 16px; line-height: 1.8; max-width: 800px; margin: 0 auto 20px; opacity: 0.95; }
.hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.hero-tags .tag { background: rgba(255,255,255,0.2); padding: 6px 16px; border-radius: 20px; font-size: 14px; }

.section-title { font-size: 28px; margin-bottom: 30px; padding-bottom: 10px; border-bottom: 3px solid #e53935; display: inline-block; }

.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin-bottom: 40px; }
.video-card { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: transform 0.3s, box-shadow 0.3s; position: relative; }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
.video-title { font-size: 18px; margin-bottom: 10px; font-weight: 600; }
.video-title a { color: #333; }
.video-title a:hover { color: #e53935; }
.video-meta { font-size: 14px; color: #666; margin-bottom: 10px; }
.video-meta span:not(:last-child)::after { content: " / "; }
.video-desc { font-size: 14px; line-height: 1.6; color: #555; margin-bottom: 15px; }
.video-review { font-size: 13px; line-height: 1.6; color: #777; font-style: italic; margin-top: 10px; padding-top: 10px; border-top: 1px dashed #ddd; }
.btn-more { display: inline-block; padding: 8px 20px; background: #e53935; color: #fff; border-radius: 4px; font-size: 14px; transition: background 0.3s; }
.btn-more:hover { background: #c62828; }

.rank-badge { position: absolute; top: 10px; right: 10px; width: 40px; height: 40px; background: linear-gradient(135deg, #ff6b6b, #ee5a6f); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: bold; box-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.date-badge { position: absolute; top: 10px; right: 10px; background: #4CAF50; color: #fff; padding: 4px 12px; border-radius: 4px; font-size: 12px; font-weight: bold; }

.entrance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-bottom: 40px; }
.entrance-card { background: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: all 0.3s; text-align: center; }
.entrance-card:hover { transform: translateY(-4px); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
.entrance-card h3 { font-size: 20px; margin-bottom: 15px; }
.entrance-card h3 a { color: #e53935; }
.entrance-card p { font-size: 14px; color: #666; line-height: 1.6; }

.video-list { display: flex; flex-direction: column; gap: 20px; }
.video-item { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: all 0.3s; }
.video-item:hover { transform: translateX(4px); box-shadow: 0 2px 12px rgba(0,0,0,0.15); }
.video-item h3 { font-size: 18px; margin-bottom: 8px; }
.video-item h3 a { color: #333; }
.video-item h3 a:hover { color: #e53935; }
.video-summary { font-size: 14px; color: #555; line-height: 1.6; margin-top: 8px; }

.topic-group { margin-bottom: 50px; }
.topic-group-title { font-size: 24px; margin-bottom: 20px; color: #e53935; padding-left: 15px; border-left: 4px solid #e53935; }

.page-header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; padding: 50px 20px; text-align: center; margin-bottom: 40px; }
.page-header h1 { font-size: 32px; margin-bottom: 15px; }
.page-desc { font-size: 16px; line-height: 1.8; max-width: 800px; margin: 0 auto; opacity: 0.95; }

.detail-page { background: #fff; margin: 20px auto; padding: 40px; border-radius: 8px; box-shadow: 0 2px 16px rgba(0,0,0,0.1); max-width: 900px; }
.detail-header { text-align: center; padding-bottom: 30px; border-bottom: 2px solid #eee; margin-bottom: 30px; }
.detail-header h1 { font-size: 36px; margin-bottom: 10px; color: #333; }
.subtitle { font-size: 16px; color: #666; }

.detail-info, .detail-oneline, .detail-summary, .detail-review, .detail-related { margin-bottom: 40px; }
.detail-info h2, .detail-oneline h2, .detail-summary h2, .detail-review h2, .detail-related h2 { font-size: 24px; margin-bottom: 20px; color: #e53935; padding-bottom: 10px; border-bottom: 2px solid #eee; }

.info-list { display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; font-size: 16px; line-height: 1.8; }
.info-list dt { font-weight: 600; color: #666; }
.info-list dd { color: #333; }

.tags-box { margin-top: 15px; }
.tags-box strong { color: #666; margin-right: 10px; }
.tag { display: inline-block; background: #f0f0f0; padding: 4px 12px; border-radius: 4px; font-size: 13px; margin: 4px; color: #555; }

.highlight { font-size: 18px; line-height: 1.8; color: #333; background: #fff9e6; padding: 20px; border-left: 4px solid #ffc107; border-radius: 4px; }

.summary-content p { font-size: 16px; line-height: 1.8; color: #444; margin-bottom: 15px; text-indent: 2em; }

.review-content { font-size: 16px; line-height: 1.8; color: #555; background: #f9f9f9; padding: 20px; border-radius: 4px; font-style: italic; }

.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.related-card { background: #f9f9f9; padding: 20px; border-radius: 8px; transition: all 0.3s; }
.related-card:hover { background: #f0f0f0; transform: translateY(-2px); }
.related-card h3 { font-size: 16px; margin-bottom: 8px; }
.related-card h3 a { color: #333; }
.related-card h3 a:hover { color: #e53935; }
.related-meta { font-size: 13px; color: #666; margin-bottom: 8px; }
.related-desc { font-size: 13px; color: #555; line-height: 1.6; }

.site-footer { background: #333; color: #fff; padding: 30px 20px; text-align: center; margin-top: 60px; }
.site-footer p { font-size: 14px; opacity: 0.8; }

@media (max-width: 768px) {
  .hero { padding: 40px 15px; }
  .hero-title { font-size: 24px; }
  .hero-desc { font-size: 14px; }
  .section-title { font-size: 22px; }
  .video-grid { grid-template-columns: 1fr; gap: 15px; }
  .entrance-grid { grid-template-columns: 1fr; }
  .detail-page { padding: 20px; margin: 10px; }
  .detail-header h1 { font-size: 28px; }
  .page-header h1 { font-size: 24px; }
  .info-list { grid-template-columns: 1fr; gap: 8px; }
  .info-list dt { font-weight: 600; }
}