.main-content { padding: 40px 0; }
.page-title { font-size: 32px; font-weight: 700; margin-bottom: 20px; color: #2c3e50; text-align: center; }
.hero-section { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; padding: 60px 0; margin-bottom: 40px; }
.hero-section .page-title { color: #fff; font-size: 28px; }
.site-intro { background: rgba(255,255,255,0.95); color: #333; padding: 25px; border-radius: 8px; margin-top: 20px; line-height: 1.8; }
.site-intro a { color: #667eea; text-decoration: none; font-weight: 600; }
.site-intro a:hover { text-decoration: underline; }
.section-title { font-size: 26px; font-weight: 700; margin: 40px 0 25px; padding-bottom: 12px; border-bottom: 3px solid #667eea; color: #2c3e50; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 25px; margin-bottom: 30px; }
.video-card { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: all 0.3s; }
.video-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.15); transform: translateY(-3px); }
.video-title { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.video-title a { color: #2c3e50; text-decoration: none; }
.video-title a:hover { color: #667eea; }
.video-meta { display: flex; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.meta-item { background: #f0f0f0; padding: 4px 10px; border-radius: 4px; font-size: 13px; color: #666; }
.video-desc { color: #666; font-size: 14px; 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(0,0,0,0.08); transition: all 0.3s; }
.video-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.video-item h3 { font-size: 18px; margin-bottom: 8px; }
.video-item h3 a { color: #2c3e50; text-decoration: none; }
.video-item h3 a:hover { color: #667eea; }
.item-meta { color: #999; font-size: 13px; margin-bottom: 8px; }
.item-desc { color: #666; font-size: 14px; line-height: 1.6; }
.topic-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-bottom: 30px; }
.topic-item { background: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: all 0.3s; }
.topic-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.topic-item h3 { font-size: 20px; margin-bottom: 12px; }
.topic-item h3 a { color: #2c3e50; text-decoration: none; }
.topic-item h3 a:hover { color: #667eea; }
.topic-item p { color: #666; line-height: 1.7; }
.section-more { text-align: center; margin-top: 30px; }
.btn-more { display: inline-block; padding: 12px 30px; background: #667eea; color: #fff; text-decoration: none; border-radius: 6px; font-weight: 600; transition: all 0.3s; }
.btn-more:hover { background: #5568d3; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(102,126,234,0.4); }
.page-intro { background: #fff; padding: 25px; border-radius: 8px; margin-bottom: 30px; line-height: 1.8; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.list-container { display: flex; flex-direction: column; gap: 20px; }
.list-card { background: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: all 0.3s; position: relative; }
.list-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.list-card.has-rank { padding-left: 80px; }
.rank-badge { position: absolute; left: 25px; top: 50%; transform: translateY(-50%); width: 40px; height: 40px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; }
.card-title { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.card-title a { color: #2c3e50; text-decoration: none; }
.card-title a:hover { color: #667eea; }
.card-meta { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.meta-tag { background: #f0f0f0; padding: 5px 12px; border-radius: 4px; font-size: 13px; color: #666; }
.card-desc { color: #666; line-height: 1.7; margin-bottom: 10px; }
.card-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.tag { background: #e8eaf6; color: #667eea; padding: 4px 10px; border-radius: 4px; font-size: 12px; }
.card-summary { color: #888; font-size: 13px; line-height: 1.6; margin-top: 10px; padding-top: 10px; border-top: 1px solid #f0f0f0; }
.detail-article { background: #fff; padding: 40px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.detail-title { font-size: 32px; font-weight: 700; color: #2c3e50; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 3px solid #667eea; }
.detail-article section { margin-bottom: 35px; }
.detail-article h2 { font-size: 22px; font-weight: 600; color: #2c3e50; margin-bottom: 15px; }
.info-list { list-style: none; }
.info-list li { padding: 10px 0; border-bottom: 1px solid #f0f0f0; line-height: 1.7; }
.info-list li:last-child { border-bottom: none; }
.info-tag { background: #e8eaf6; color: #667eea; padding: 4px 10px; border-radius: 4px; font-size: 13px; margin-right: 8px; }
.highlight-text { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; padding: 20px; border-radius: 8px; font-size: 16px; line-height: 1.8; font-weight: 500; }
.detail-summary p { line-height: 2; color: #555; font-size: 15px; text-align: justify; }
.review-text { background: #f9f9f9; padding: 20px; border-radius: 8px; border-left: 4px solid #667eea; line-height: 1.8; color: #555; font-style: italic; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.related-card { background: #f9f9f9; padding: 18px; 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: #2c3e50; text-decoration: none; }
.related-card h3 a:hover { color: #667eea; }
.related-desc { color: #666; font-size: 13px; line-height: 1.6; }
@media (max-width: 768px) {
  .hero-section { padding: 40px 0; }
  .hero-section .page-title { font-size: 22px; }
  .site-intro, .page-intro { padding: 18px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
  .detail-article { padding: 25px 20px; }
  .detail-title { font-size: 24px; }
  .list-card.has-rank { padding-left: 70px; }
  .rank-badge { width: 35px; height: 35px; font-size: 16px; left: 20px; }
  .related-grid { grid-template-columns: 1fr; }
}