#home {
opacity: 0.80;
margin: 0 auto;

}
body {
color: #000;
background: url(https://images.cnblogs.com/cnblogs_com/xuedine/1567727/o_星空1.gif)fixed;
background-size: 120%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 12px;
min-height: 100%;

}