body {
    font-family: Verdana,Arial,Helvetica,sans-serif;
    font-size: 12px;
    line-height: 1.5;
    margin: 35px 5px 5px 5px;
    padding: 0;
    background-color: #bbb;
    background: url(//images.cnblogs.com/cnblogs_com/fcouds/1404236/o_20170629082745_mSBuT.jpg) fixed;

    background-repeat:no-repeat;
    background-size:100% 100%;
    background-attachment: fixed;" 
}

#home {
    margin: 0 auto;
    opacity: 0.8;
    width: 65%;
    min-width: 950px;
    background-color: #fff;
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}