#home {
    opacity: 0.70;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
body {
    color: #000;
    background: url(https://images.cnblogs.com/cnblogs_com/wjhsmart/1817159/o_2007300516461.jpg
) fixed;
    background-size: 100%;
    background-repeat: no-repeat;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
}