body {
      font-size:15px;
       padding:0;
       margin:0;
     font-family:"微软雅黑","宋体",Arial;
       background:#205424 url(https://img.xjh.me/random_img.php?type=bg&ctype=nature&return=302) no-repeat top center fixed;
       min-width:1200px;
  }