footer .flex_row{display:-webkit-box;display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap}.back_to_top{border-style:solid;border-width:1px;bottom:100px;opacity:1;transform:none;visibility:visible}.footer-social-item a img{height:10px;width:auto}.footer-social-item a img.hover-img-icon,.footer-social-item.tyimg.hover-img a:hover img:first-child{display:none}.footer-social-item.tyimg.hover-img a:hover .hover-img-icon{display:block}