.center_img{position:fixed;top:-15%;bottom:0;left:0;right:0;margin:auto;max-width:565px;max-height:377px;text-align:center}.center_img img{max-width:90%;height:auto}.center_img .txt{position:absolute;margin-top:-40px;left:50%;transform:translate(-50%)}.center_img .txt span{color:#7b95db}.center_img .back_btn{position:absolute;margin-top:40px;left:50%;transform:translate(-50%)}