.img-bg{position:fixed;top:0;bottom:0;z-index:1000;display:none;width:100%;left:0;background-color:rgba(0,0,0,0.8)}.img-bg .img-box{width:100%;position:relative;top:50%;transform:translatey(-50%)}.img-bg .icon-close{position:absolute;width:25px;height:25px;top:10px;right:10px}