#home {
     margin: 0 auto;
       width: 80%;/*原始65*/
       min-width: 980px;/*页面顶部的宽度*/
      background-color: rgba(245, 245, 245, 0.7);
       padding: 30px;
       margin-top: 50px;
      margin-bottom: 50px;
       box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
  }
  body {
     background: rgba(12, 100, 129, 1) url('https://attach.bbs.miui.com/forum/201406/29/002350y098au8440ja80gm.jpg') fixed no-repeat;
     background-position: 50% 5%;
      background-size: cover;
  }
 #navList a:hover {
      color: white;
     background-color: #8BC34A;
      text-decoration: none;
      text-shadow: 0px 0px 1px #8BC34A;
  }