#wachat a {
    position: fixed;
    height: 60px;
    width: 60px;
    z-index: 9999;
    margin-top: -25px;
    cursor: pointer;
    color: #fff;
    text-align: center;
    margin: 0 auto 0 auto;
    -webkit-transition: All .5s ease;
    -moz-transition: All .5s ease;
    -o-transition: All .5s ease;
    -ms-transition: All .5s ease;
    transition: All .5s ease;
    right: 13px;
    bottom: 60px;
}

#wachat a img{
	width: 60px;
}