#back_close{
    background: url(https://game.gtimg.cn/images/dfm/cp/m20260210red/back_close.png) center center no-repeat;
    background-size: 100% 100%;
    position: absolute;
    left: 0.3rem;
    top: 0.45rem;
    height: 0.4rem;
    width: 1rem;
    z-index: 9999;
}