.mask{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30}.mask .inner-container{width:700px;height:700px;top:50%;position:relative;left:50%;transform:translate(-50%,-50%);background:#fff;box-shadow:0 4px 10px rgba(0,0,0,.2)}.mask .inner-container .close-btn{position:absolute;width:22px;height:22px;font-size:22px;top:20px;right:20px;color:#999;z-index:10;cursor:pointer}