.footer .wechat-icon, .footer .linkedin-icon {
        display: inline-block;}
.footer .wechat-icon:hover .wechat-qrcode, .footer .linkedin-icon:hover .linkedin-qrcode{
        display: block;}
.footer .wechat-qrcode, .footer .linkedin-qrcode {
        width: 150px;
        height: 150px;
        position: absolute;
        z-index:22;
        border: 2px solid silver;
        display: none;}
.footer .wechat-qrcode {
        background: url(../ISESS/cn/images/home/wechat.qrcode.jpg) no-repeat 0px 0px;
        margin: -160px 0 0 -5px;}
.footer .linkedin-qrcode {
        background: url(../ISESS/cn/images/home/linkedin.qrcode.jpg) no-repeat 0px 0px;
        margin: -160px 0 0 -5px;}