.cst-scroll-top{bottom:30px;cursor:pointer;height:27px;opacity:0;position:fixed;right:30px;transform:translateY(10px);transition:all .3s ease;visibility:hidden;width:27px;z-index:9999}.cst-scroll-top img{display:block;height:auto;width:100%}.cst-scroll-top.show{opacity:1;transform:translateY(0);visibility:visible}