/*背景图*/
body{
    background-image: url("https://images.cnblogs.com/cnblogs_com/Yogurt-harry/1763830/o_20051302205720200513101817.jpg");
    background-position: initial;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-origin: initial;
    background-clip: initial;
    height:100%;
    width:100%;
    }

/*公告栏时钟*/
#clockdiv {

text-align: left;

}