body{background:url(https://pacdn.m.stock.pingan.com/files/rmd-file/ae/09/ae09687357fe90b0ebc0522b27cffa5b.jpg) no-repeat top center;background-size:cover}#mantle{display:none;position:fixed;top:0;left:0;bottom:0;right:0;width:100%;height:100%;background:rgba(000,000,000,.6);z-index:111}#mantle>img{position:absolute;top:0;left:0;width:100%;z-index:222}.mod_tx{position:absolute;top:2rem;left:50%;transform:translateX(-50%);color:#FFF;z-index:333;font-size:.32rem;width:100%;text-align:center}