ul.product-cats li {
    list-style: none;
    margin-left: 0;
    margin-bottom: 4.236em;
    text-align: center;
    position: relative;
}
ul.product-cats li img {
    margin: 0 auto; 
}
h3:after{
    background:none !important;
    display:inline !important;
}
body.single-product a.button.wc-backward {
background: url("http://www.nhadepstore.com/docs/2015/03/fav_icon.png") no-repeat transparent;
color: #17A89F;
text-decoration: underline;
box-shadow: none;
padding-left: 55px !important;
}
 
@media screen and (min-width:768px) {
 
    ul.product-cats {
        margin-left: 0;
        clear: both;
    }
    ul.product-cats li {
        width: 29.4117647059%;
        float: left;
        margin-right: 5.8823529412%;
    }
    ul.product-cats li:nth-of-type(3) {
        margin-right: 0;
    }
     
}