body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #ffffff;
  color: #333333;
  margin: 0;
  padding: 20px 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  }
  /* 主标题 (H1) */
  h1 {
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  color: #1a1a1a;
  margin-bottom: 12px;
  margin-top: 10px;
  }
  /* 副标题/章节标题 (H2) */
  h2 {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a1a;
  margin-top: 32px;
  margin-bottom: 12px;
  border-left: 4px solid #57A9FB;
  padding-left: 10px;
  line-height: 1.4;
  }
  /* 小标题 (H3/H4) */
  h3, h4 {
  font-size: 16px;
  font-weight: 600;
  color: #333333;
  margin-top: 20px;
  margin-bottom: 8px;
  }
  /* 正文段落 */
  p {
  font-size: 15px;
  color: #444444;
  margin-bottom: 16px;
  text-align: justify;
  }
  /* 强调文字/加粗 */
  strong, b {
  font-weight: 600;
  color: #1a1a1a;
  }
  /* 列表样式 */
  ul, ol {
  padding-left: 20px;
  margin-bottom: 16px;
  }
  li {
  font-size: 15px;
  color: #444444;
  margin-bottom: 8px;
  line-height: 1.6;
  }
  /* 链接样式 */
  a {
  color: #57A9FB;
  text-decoration: none;
  word-break: break-all;
  }
  /* 链接点击态 */
  a:active {
  opacity: 0.7;
  }
  /* 引用/特殊说明块 */
  blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background-color: #f5f7fa;
  border-radius: 8px;
  font-size: 14px;
  color: #666666;
  border-left: none;
  }
  /* 表格样式 (如果有) */
  table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 14px;
  }
  th, td {
  border: 1px solid #eeeeee;
  padding: 8px;
  text-align: left;
  }
  th {
  background-color: #f8f8f8;
  font-weight: 600;
  }