.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.main-content { min-height: calc(100vh - 200px); }
.hero { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 60px 20px; text-align: center; }
.hero h1 { font-size: 32px; margin-bottom: 20px; }
.hero .intro { font-size: 16px; line-height: 1.8; max-width: 900px; margin: 0 auto; }
.section { padding: 40px 0; }
.section h2 { font-size: 28px; margin-bottom: 20px; color: #333; border-left: 4px solid #d32f2f; padding-left: 15px; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin-top: 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 { font-size: 18px; margin-bottom: 10px; }
.video-card h3 a { color: #333; }
.video-card h3 a:hover { color: #d32f2f; }
.meta { color: #666; font-size: 14px; margin: 8px 0; }
.oneline { color: #555; font-size: 14px; line-height: 1.6; }
.video-list { margin-top: 20px; }
.video-item { background: white; padding: 25px; margin-bottom: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); position: relative; }
.video-item h3 { font-size: 20px; margin-bottom: 12px; }
.video-item .rank { position: absolute; top: 20px; right: 20px; background: #d32f2f; color: white; padding: 5px 12px; border-radius: 20px; font-size: 14px; font-weight: bold; }
.video-item .date { color: #999; font-size: 14px; margin-bottom: 10px; display: inline-block; }
.review { color: #666; margin-top: 10px; font-style: italic; }
.detail-page { background: white; padding: 40px; border-radius: 8px; margin: 30px auto; }
.detail-page h1 { font-size: 32px; margin-bottom: 30px; color: #333; }
.info-box { background: #f9f9f9; padding: 20px; border-radius: 8px; margin-bottom: 30px; }
.info-box p { margin: 8px 0; line-height: 1.8; }
.content-section { margin: 30px 0; }
.content-section h2 { font-size: 24px; margin-bottom: 15px; color: #333; border-left: 4px solid #d32f2f; padding-left: 12px; }
.highlight { font-size: 18px; color: #d32f2f; font-weight: bold; line-height: 1.8; }
.summary { font-size: 16px; line-height: 1.8; color: #555; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; margin-top: 20px; }
.related-card { background: #f9f9f9; padding: 15px; border-radius: 8px; }
.related-card h3 { font-size: 16px; margin-bottom: 8px; }
.footer { background: #333; color: white; text-align: center; padding: 30px 20px; margin-top: 60px; }
.page-intro { font-size: 16px; line-height: 1.8; margin: 20px 0 30px; color: #555; }
.list-section p, .new-section p { margin: 15px 0; line-height: 1.8; }
.list-section a, .new-section a { color: #d32f2f; text-decoration: underline; }
@media (max-width: 768px) {
  .hero h1 { font-size: 24px; }
  .hero .intro { font-size: 14px; }
  .section h2 { font-size: 22px; }
  .video-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .detail-page { padding: 20px; }
  .detail-page h1 { font-size: 24px; }
}