.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* Hero Section */
.hero { text-align: center; padding: 60px 20px; background: linear-gradient(135deg, #e74c3c, #c0392b); color: white; border-radius: 10px; margin-bottom: 40px; }
.hero h1 { font-size: 32px; margin-bottom: 15px; }
.subtitle { font-size: 16px; opacity: 0.9; }

/* Intro Section */
.intro { background: white; padding: 30px; border-radius: 10px; margin-bottom: 40px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); line-height: 1.8; }

/* Section */
.section { margin-bottom: 50px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.section-header h2 { font-size: 24px; color: #333; }
.more-link { color: #e74c3c; font-size: 14px; }
.more-link:hover { text-decoration: underline; }

/* Card Grid */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.card { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: transform 0.3s, box-shadow 0.3s; }
.card:hover { transform: translateY(-5px); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card h3 a { color: #333; }
.card h3 a:hover { color: #e74c3c; }
.card .meta { font-size: 13px; color: #666; margin-bottom: 10px; }
.card .desc { font-size: 14px; color: #777; line-height: 1.6; }

/* Topic List */
.topic-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 15px; }
.topic-item { display: block; background: white; padding: 20px; border-radius: 8px; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: all 0.3s; }
.topic-item:hover { background: #e74c3c; color: white; transform: translateY(-3px); }

/* Page Header */
.page-header { text-align: center; padding: 40px 20px; margin-bottom: 30px; }
.page-header h1 { font-size: 32px; color: #333; margin-bottom: 10px; }
.page-header p { font-size: 16px; color: #666; }

/* List Section */
.list-section { background: white; border-radius: 10px; padding: 30px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.list-item { padding: 20px 0; border-bottom: 1px solid #eee; display: flex; gap: 20px; }
.list-item:last-child { border-bottom: none; }
.list-item.ranked { position: relative; }
.list-item .rank { font-size: 24px; font-weight: bold; color: #e74c3c; min-width: 40px; }
.list-item h3 { font-size: 20px; margin-bottom: 8px; }
.list-item h3 a { color: #333; }
.list-item h3 a:hover { color: #e74c3c; }
.list-item .meta { font-size: 13px; color: #666; margin-bottom: 8px; }
.list-item .summary { font-size: 14px; color: #777; line-height: 1.6; }

/* Detail Page */
.detail-content { background: white; padding: 40px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.detail-content h1 { font-size: 32px; color: #333; margin-bottom: 30px; padding-bottom: 15px; border-bottom: 2px solid #e74c3c; }
.detail-content h2 { font-size: 22px; color: #333; margin: 30px 0 15px; }
.info-list { list-style: none; line-height: 2; }
.info-list li { font-size: 15px; }
.info-list strong { color: #555; margin-right: 10px; }
.highlight { font-size: 16px; line-height: 1.8; background: #f8f9fa; padding: 20px; border-left: 4px solid #e74c3c; border-radius: 4px; }
.summary-section p, .review-section p { font-size: 15px; 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: #f8f9fa; padding: 15px; border-radius: 8px; transition: all 0.3s; }
.related-card:hover { background: #e9ecef; }
.related-card h3 { font-size: 16px; margin-bottom: 8px; }
.related-card h3 a { color: #333; }
.related-card h3 a:hover { color: #e74c3c; }
.related-card .meta { font-size: 12px; color: #666; margin-bottom: 6px; }
.related-card .desc { font-size: 13px; color: #777; }

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 40px 15px; }
  .hero h1 { font-size: 24px; }
  .container { padding: 15px; }
  .card-grid { grid-template-columns: 1fr; }
  .topic-list { grid-template-columns: 1fr; }
  .detail-content { padding: 20px; }
  .detail-content h1 { font-size: 24px; }
  .list-item { flex-direction: column; gap: 10px; }
}