*,body,html{margin:0;padding:0}.mask{width:100vw;height:100vh;position:fixed;top:0;background:rgba(0,0,0,.5)}.mask .mask-img{position:absolute;top:10px;right:10px;width:60vw}.wx_top{width:100vw;position:fixed;top:0}.wx_bottom{width:172px;height:46px}.flexRowCenter{width:100vw;display:flex;align-items:center;justify-content:center;position:fixed;bottom:120px}