body {
color: #000;
background: url(https://images.cnblogs.com/cnblogs_com/SupersLWF/2033989/o_210920103146previewFix.jpg) fixed !important;
background-size:100% 100%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 12px;
//cursor: url('https://pic.cnblogs.com/face/1247197/20180330210354.png'),pointer;
}
#home{
    opacity: 0.65;
}
#top_nav{
    opacity: 0.00;
}