body {
    color: #CFE8CB;

    background:url(https://images.cnblogs.com/cnblogs_com/hdming/1480475/o_231225153613_gray.png) fixed;
    background-position:center;
    background-size:cover;
    background-repeat: no-repeat;
    font-family: "微软雅黑" , "PTSans" , "Arial" ,sans-serif;
    font-size: 14px;
    min-height: 101%;
}