.weixin {
    position: relative;
    }
    
    .weixin img.qrcode {
    position: absolute;
    z-index: 99;
    top: -135px;
    right: -28px;
    width: 12.5rem;
    max-width: none;
    height: 12.5rem;
    transform: scale(0);
    transform-origin: top right;
    opacity: 0;
    border: .3125rem solid #0085ba;
    border-radius: .25rem;
    -webkit-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
    transition: all .4s ease-in-out;
    
    }
    
    .weixin:hover img.qrcode {
    transform: scale(1);
    opacity: 1;
    }