.appmask{width:200%;height:200%;position:fixed;top:0;left:0;transform:translate(-50%, -50%);background-color:#000000;filter:opacity(.7);z-index:9999;display:none}.appdown{width:24.26668rem;height:32.106684rem;position:fixed;top:50%;left:50%;transform:translate(-50%, -50%);background:url("https://files.mijwed.com/activity/sem/sem20190717/20190718app/lijixz-bg.png") center center no-repeat no-repeat;background-size:cover;z-index:99999;overflow:hidden;display:none}.appdown .appbtn{width:18.666677rem;height:2.501335rem;margin:26.581348rem auto 0}.appdown .appbtn img{width:100%}.appdown .appclose{width:1.792001rem;height:1.792001rem;position:absolute;top:.448rem;right:.448rem;cursor:pointer}.appdown .appclose img{width:100%;height:100%}