.hy-mask{position:fixed;left:0;top:0;bottom:0;right:0;opacity:0;-webkit-transition:opacity .5s;transition:opacity .5s;background-color:rgba(0,0,0,.6);display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.hy-mask-slot{width:0;height:0;background:#fff;z-index:2;position:fixed}