.container {
  background: white;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.site-intro {
  margin-bottom: 3rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 8px;
  line-height: 1.8;
}

section {
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: #2c3e50;
  border-left: 4px solid #667eea;
  padding-left: 1rem;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.video-card {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.2);
}

.video-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.video-card .meta {
  color: #7f8c8d;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.video-card .oneline {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.6;
}

.video-list {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1rem;
}

.video-item {
  padding: 1rem;
  border-bottom: 1px solid #e0e0e0;
}

.video-item:last-child {
  border-bottom: none;
}

.video-item a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #333;
  gap: 1rem;
}

.video-item .title {
  font-weight: 500;
  flex: 1;
}

.video-item .tags {
  color: #7f8c8d;
  font-size: 0.9rem;
}

.more-link {
  text-align: right;
  margin-top: 1rem;
}

.more-link a {
  color: #667eea;
  font-weight: 500;
  font-size: 1rem;
}

.page-desc {
  margin-bottom: 2rem;
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 6px;
  line-height: 1.8;
}

.video-list-page {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.video-item-full {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  transition: box-shadow 0.3s;
}

.video-item-full:hover {
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
}

.rank {
  font-size: 2rem;
  font-weight: bold;
  color: #667eea;
  min-width: 3rem;
  text-align: center;
}

.item-content {
  flex: 1;
}

.item-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.item-content .meta {
  color: #7f8c8d;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.item-content .oneline {
  color: #555;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.item-content .review {
  color: #666;
  font-style: italic;
  line-height: 1.6;
  padding-left: 1rem;
  border-left: 3px solid #667eea;
}

.detail-page h1 {
  font-size: 2.2rem;
  margin-bottom: 2rem;
  color: #2c3e50;
}

.basic-info {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.info-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.8rem;
}

.info-list li {
  line-height: 1.8;
}

.oneline-section p,
.summary-section p,
.review-section p {
  line-height: 1.8;
  color: #555;
  font-size: 1rem;
}

.review-section {
  background: #fff9e6;
  border-radius: 8px;
  padding: 1.5rem;
  border-left: 4px solid #ffc107;
}

.related-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid #e0e0e0;
}

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

  .video-grid {
    grid-template-columns: 1fr;
  }

  .video-item a {
    flex-direction: column;
    align-items: flex-start;
  }

  .info-list {
    grid-template-columns: 1fr;
  }

  h2 {
    font-size: 1.3rem;
  }

  .detail-page h1 {
    font-size: 1.8rem;
  }
}