1 #home {
  2     margin: 0 auto;
  3     width: 80%;/*原始65*/
  4     min-width: 980px;/*页面顶部的宽度*/
  5     background-color: rgba(245, 245, 245, 0.7);
  6     padding: 30px;
  7     margin-top: 50px;
  8     margin-bottom: 50px;
  9     box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
 10 }
 11 body {
 12     background: rgba(12, 100, 129, 1) url('https://images.cnblogs.com/cnblogs_com/Penn000/1013849/o_fr.jpg') fixed no-repeat;
 13     background-position: 50% 5%; 
 14     background-size: cover;