body {
    color: #000;
    background: #fff;
    font-family: Verdana,Arial,Helvetica,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background: url(https://www.cnblogs.com/images/cnblogs_com/trnanks/1437905/o_13132164612323.jpg) top center #000;
}


#home {
opacity: 0.80;
    margin: 0 auto;
    width: 980px;
}