body {
  min-height: 100vh;
}

.main-container {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #222;
  line-height: 1.3;
}

h2 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
  color: #333;
  border-bottom: 2px solid #0066cc;
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.2rem;
  margin: 1rem 0 0.5rem;
  color: #444;
}

.site-intro {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 6px;
  margin: 1.5rem 0;
  line-height: 1.8;
}

.site-intro p {
  margin-bottom: 0.8rem;
}

.site-intro p:last-child {
  margin-bottom: 0;
}

section {
  margin: 2.5rem 0;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.video-grid li {
  background: #fafafa;
  padding: 1.2rem;
  border-radius: 6px;
  border: 1px solid #e0e0e0;
  transition: all 0.3s;
}

.video-grid li:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

.video-grid h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.video-grid p {
  color: #666;
  font-size: 0.95rem;
  line-height: 1.6;
}

.video-list {
  margin: 1.5rem 0;
}

.video-list li {
  padding: 0.8rem 0;
  border-bottom: 1px solid #f0f0f0;
  line-height: 1.8;
}

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

.video-list-page {
  margin: 2rem 0;
}

.video-item {
  background: #fafafa;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  border: 1px solid #e0e0e0;
  position: relative;
}

.video-item .rank-num {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: #0066cc;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.9rem;
}

.video-item h3 {
  margin-top: 0;
  padding-right: 3rem;
}

.video-meta {
  color: #888;
  font-size: 0.9rem;
  margin: 0.5rem 0;
}

.video-desc {
  color: #666;
  line-height: 1.6;
  margin-top: 0.8rem;
}

.page-intro {
  background: #f8f9fa;
  padding: 1.2rem;
  border-radius: 6px;
  margin: 1.5rem 0;
  line-height: 1.8;
  color: #555;
}

.video-detail section {
  margin: 2rem 0;
}

.video-info ul {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 6px;
}

.video-info li {
  padding: 0.6rem 0;
  line-height: 1.6;
}

.video-oneline p,
.video-summary p,
.video-review p {
  line-height: 1.8;
  color: #555;
  margin-bottom: 1rem;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.related-list li {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid #e8e8e8;
}

.related-list h3 {
  margin-top: 0;
  font-size: 1rem;
}

.related-list p {
  color: #666;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-top: 0.5rem;
}

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

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.3rem;
  }

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

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