body {
min-height: 101%;
background: url(//images.cnblogs.com/cnblogs_com/wangxirui/1818136/o_200731082013a148efaf58be66288d6ed0e0d9cff18e.jpg) fixed
}
#home {
margin: 0 auto;
opacity: 0.8;
width: 65%;
min-width: 1080px;
background-color: #fff;
padding: 30px;
margin-top: 50px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}