.distribution-posters{position:relative}.pic{width:4rem;height:4rem;top:50vh;left:50%;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}.pic,.preserve{position:absolute}.preserve{width:100%;top:4.5rem;left:0;color:#666;text-align:center;margin-top:.4rem}.preserve .line{width:4.2rem;height:.01rem;background-color:#666}.preserve .tip{margin:0 .3rem}.qrcode_box #qrcode{text-align:center;margin:0 auto}