body.ui-style-5 {
  --primary-color: #1a73e8;
  --secondary-color: #34a853;
  --text-color: #333;
  --bg-color: #f5f5f5;
  --card-bg: #fff;
}

main { padding: 40px 0; min-height: calc(100vh - 200px); }
.hero { text-align: center; padding: 60px 20px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; border-radius: 8px; margin-bottom: 40px; }
.hero h1 { font-size: 32px; margin-bottom: 20px; }
.hero .intro { font-size: 16px; line-height: 1.8; max-width: 800px; margin: 0 auto; }

section { margin-bottom: 50px; }
section h2 { font-size: 28px; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 3px solid var(--primary-color); }

.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.video-card { background: var(--card-bg); padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: transform 0.3s; position: relative; }
.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 .meta { color: #666; font-size: 14px; margin-bottom: 10px; }
.video-card .desc { font-size: 14px; color: #555; line-height: 1.6; }
.video-card .rank { position: absolute; top: 10px; right: 10px; background: #ff6b6b; color: #fff; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; }

.more-link { text-align: center; margin-top: 30px; font-size: 16px; }

.list-page { background: #fff; padding: 40px; border-radius: 8px; }
.page-intro { font-size: 16px; margin-bottom: 30px; line-height: 1.8; color: #555; }
.video-list { display: flex; flex-direction: column; gap: 15px; }

.detail-page { background: #fff; padding: 40px; border-radius: 8px; }
.detail-page h1 { font-size: 36px; margin-bottom: 20px; color: var(--primary-color); }
.video-info { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 15px; margin-bottom: 30px; padding: 20px; background: #f9f9f9; border-radius: 8px; }
.info-item { font-size: 15px; }
.one-line, .summary, .review, .related { margin-bottom: 30px; }
.one-line h2, .summary h2, .review h2, .related h2 { font-size: 24px; margin-bottom: 15px; }
.one-line p, .summary p, .review p { font-size: 15px; line-height: 1.8; margin-bottom: 10px; }

footer { background: #333; color: #fff; padding: 30px 0; text-align: center; margin-top: 50px; }

@media (max-width: 767px) {
  .hero h1 { font-size: 24px; }
  .hero .intro { font-size: 14px; }
  .video-grid { grid-template-columns: 1fr; }
  .detail-page { padding: 20px; }
  .detail-page h1 { font-size: 28px; }
}