body{
     color:#000;
    background-color:#e6e6e6;
    font-size:12px;
    min-height:101%;  
 background:url(https://images.cnblogs.com/cnblogs_com/bo-box/1638532/o_2001290211081.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);
}