.loading{
    width: 100%;
    height: 100%;
    position: fixed;
    top:0;
    left: 0;
    z-index:100;
    background: #fff;
}
.loading .pic{
    width: 280px;
    height: 100px;
    background: url("../image/wgv_m.gif");
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
}