#back-to-top{position:fixed!important;bottom:10px;text-decoration:none;transition:opacity 0.2s ease-out;opacity:0;}#back-to-top.show{opacity:0.6;}#back-to-top a{background-color:#1A1A1A;width:50px;border:solid #666 1px;border-radius:3px;}.sp_icon{height:1.7em;width:1.7em;position:relative;top:-0.2em;}