.zxkf {
    position: fixed;
    right: 0px;
    bottom: 50%;
    z-index: 99999;
    width: 80px;
}
.qqkf,.returnTop{width:80px; height:80px; background:#0093dd; cursor:pointer; text-align:center; display:block;}
.returnTop{background:#313131;}
.img{width:40px;  display:inline-block; margin-top:10px;}
.qqkf .img{width:50px;}
.returnTop .img{width:27px; margin-top:15px;}

a.kf_qq {
    display: block;
    position: absolute;
    z-index: 120;
    top: 0px;
    width: 100px;
    height: 70px;
 }