body {
    color: #000;
    background: #fff;
    font-family: Verdana,Arial,Helvetica,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background: url(https://images.cnblogs.com/cnblogs_com/zhouxiaosong/1483849/o_bg-recurrent3.jpg) top center #000;
}