html, body {
    margin: 0;
    padding: 0;
  }
  
  html {
    font-size: 15px;
    background-image:url("../images/bj1.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
   
  }
  
  body {
    width: 70%;
    min-width: 800px;
    margin: 0 auto;
  }
  
  /* || 排版 */
  
  
  /* || 标题布局 */