.back2Top{position:fixed;padding:15px 25px;background-color:rgba(116,135,146,.6901960784);border:1px solid #748792;color:#fff;border-radius:5px;bottom:15px;right:15px;cursor:pointer;font-size:2em;font-weight:700;z-index:99;visibility:hidden;opacity:0;transition:visibility 0s,opacity .25s linear}.back2Top.show{visibility:visible;opacity:1}