.info-section {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 6px;
  margin: 1.5rem 0;
  border-left: 4px solid #2a5298;
}

.info-section p {
  margin: 0.5rem 0;
  line-height: 1.8;
}

.highlight {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
}

.highlight h2 {
  color: white;
  margin-top: 0;
  font-size: 1.3rem;
  border-bottom: 2px solid rgba(255,255,255,0.3);
  padding-bottom: 0.5rem;
}

.summary, .review {
  margin: 2rem 0;
  padding: 1.5rem;
  background: #fefefe;
  border-radius: 6px;
  border: 1px solid #e8e8e8;
}

.summary h2, .review h2 {
  color: #1e3c72;
  font-size: 1.3rem;
  margin-top: 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2a5298;
}

.related {
  margin: 2rem 0;
}

.related h2 {
  color: #1e3c72;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2a5298;
}

.intro-section {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
  line-height: 1.8;
  border-left: 4px solid #2a5298;
}

.hot-section, .latest-section, .nav-links {
  margin: 2.5rem 0;
}

.hot-section h2, .latest-section h2, .nav-links h2 {
  color: #1e3c72;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2a5298;
}

.meta {
  color: #666;
  font-size: 0.9rem;
  margin: 0.3rem 0;
}

.tags {
  color: #888;
  font-size: 0.85rem;
  font-style: italic;
}

.intro {
  background: #f0f4f8;
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  border-left: 3px solid #2a5298;
  line-height: 1.7;
}

.list-card, .rank-card, .topic-card, .latest-card {
  position: relative;
}

.rank-number {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.topic-group {
  margin: 2rem 0;
  padding: 1.5rem;
  background: #f9f9f9;
  border-radius: 8px;
  border: 1px solid #e5e5e5;
}

.topic-title {
  color: #1e3c72;
  font-size: 1.4rem;
  margin: 0 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2a5298;
}

.date-label {
  color: #888;
  font-size: 0.85rem;
  margin-top: 0.5rem;
  font-style: italic;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  background: #f5f5f5;
  color: #666;
  margin-top: 3rem;
  border-top: 1px solid #e0e0e0;
}

@media (max-width: 768px) {
  .container {
    padding: 0 0.5rem;
    margin: 1rem auto;
  }

  .card {
    padding: 0.8rem;
  }

  .rank-number {
    font-size: 1.2rem;
    padding: 0.2rem 0.6rem;
  }

  .info-section, .summary, .review {
    padding: 1rem;
  }

  .highlight {
    padding: 1rem;
  }
}