/* Markdown 标题美化样式：h1~h6 */

h1 {
    font-size: 2.2em;
    font-weight: bold;
    margin-top: 2em;
    margin-bottom: 1em;
    color: #222;
  }
  
  h2 {
    font-size: 1.8em;
    font-weight: bold;
    margin-top: 1.8em;
    margin-bottom: 0.9em;
    color: #333;
  }
  
  h3 {
    font-size: 1.5em;
    font-weight: bold;
    margin-top: 1.6em;
    margin-bottom: 0.8em;
    color: #444;
  }
  
  h4 {
    font-size: 1.3em;
    font-weight: bold;
    margin-top: 1.4em;
    margin-bottom: 0.7em;
    color: #444;
  }
  
  h5 {
    font-size: 1.2em;
    font-weight: bold;
    margin-top: 1.2em;
    margin-bottom: 0.6em;
    color: #555;
  }
  
  h6 {
    font-size: 1.1em;
    font-weight: bold;
    margin-top: 1em;
    margin-bottom: 0.5em;
    color: #666;
  }