/* 主内容区样式 */
.main-content {
  flex: 1;
  max-width: 1200px;
  overflow-x: hidden;
  margin: 0 auto;
}
.main-content h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  border-bottom: none;
}
.main-content > p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}
/* 文档大类区块 */
.category-section {
  margin-bottom: 4rem;
  scroll-margin-top: 2rem; /* 锚点跳转时留出顶部空间 */
}
.category-section h2 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  align-items: center;
}
.category-section h2::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 24px;
  background-color: var(--primary-color);
  margin-right: 0.75rem;
  border-radius: 3px;
}
/* 文档列表网格 */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
/* 文档卡片 */
.doc-card {
  display: block;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-color);
  background: var(--bg-color);
  transition: all 0.3s ease;
}
.doc-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
  transform: translateY(-2px);
}
.doc-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}
.doc-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}
/* 响应式适配 */
@media (max-width: 768px) {
  body {
    flex-direction: column;
  }
  .main-content {
    margin-left: 0;
    padding: 2rem 1.5rem;
  }
  .doc-grid {
    grid-template-columns: 1fr;
  }
}