/* 文章内容更窄，更像文档 */
.post-content {
    max-width: 860px;
    margin: 0 auto;
  }
  
  /* 标题更清晰 */
  .post-content h1, .post-content h2, .post-content h3 {
    letter-spacing: 0.2px;
  }
  
  /* 段落更好读 */
  .post-content p {
    line-height: 1.85;
    font-size: 16px;
  }