.bg_flash {
    position: absolute;
    left: 50%;
    top: 0;
    width: 1920px;
    margin-left: -960px;
    z-index: 1;
}
.bg_flash div {
    height: 821px;
}
.ym_bg_left {
    left: 0;
    z-index: 2;
   position: absolute;
    top: 0;
        background: url(../images/ice.png) no-repeat 0 0;
}
.ym_bg_right {
    right: 0;
    z-index: 1;
        position: absolute;
    top: 0;
    width: 1920px;
}
.yc {
    position: absolute;
    top: 0;
    width: 1920px;
    background: url(../images/hot.jpg?v=2016112501) no-repeat scroll 0 1px;
}
.per_ice {
    position: absolute;
    bottom: 0;
    left: -50px;
    z-index: 3;
}
.per_hot {
    position: absolute;
    bottom: 0;
    left: 1170px;
    z-index: 3;
}