.btm-zan {width: 100%;text-align: center;}
.btm-zan .zan {background: url(../img/zan.png) center no-repeat;background-size: 50px;width: 50px;height: 50px;margin: 0 auto;display: block;}
.btm-zan .hover {background: url(../img/yizan.png) center no-repeat;background-size: 50px;width: 50px;height: 50px;margin: 0 auto;display: block;}
.btm-zan .zan span {color: #0c0c0c;margin-top: 55px;display: inline-block;}
.btn-zan a:hover {color:#FFF;}