.mask{width:100%;height:100%;background-color:rgba(242,242,242,.5);position:fixed;left:0;top:0;text-align:center;display:-webkit-flex;display:flex;-webkit-align-items:center;align-items:center;-webkit-justify-content:center;justify-content:center}
.mask>div{border:1px solid #d0d0d0;font-size:0.28rem;padding:15px 15px;max-width:150px;color:#494a5f;background:url(../images/loading.gif) no-repeat 5px 15px;padding-left:25px;background-color:#fff;word-wrap:break-word;margin:0 auto}
.scroll-off{position:fixed;overflow-y:hidden}