.btn-back-to-top{position:fixed;bottom:40px;right:40px;z-index:12;width:60px;height:60px;visibility:hidden;opacity:0;background:#f26522;color:#fff;border:2px solid #ff5824}
.btn-back-to-top.show{visibility:visible;opacity:1}
.btn-back-to-top:hover{background:#fff;border-color:#ff5824;color:#ff5824}
.btn-back-to-top:after{box-shadow:0 0 0 2px #7e5cdd;-moz-box-shadow:0 0 0 2px #7e5cdd;-webkit-box-shadow:0 0 0 2px #7e5cdd;left:0;opacity:0;-khtml-opacity:0;-webkit-opacity:0;-moz-opacity:0;padding:0;top:0;transform:scale(0.9);-webkit-transform:scale(0.9);-ms-transform:scale(0.9);-o-transform:scale(0.9);-moz-transform:scale(0.9);z-index:-1;position:absolute;content:"";right:0;bottom:0;border-radius:50%}
.btn-back-to-top:hover:after{animation:1.3s ease-out 3ms normal none 1 running sonarEffect;-webkit-animation:1.3s ease-out 3ms normal none 1 running sonarEffect;-moz-animation:1.3s ease-out 3ms normal none 1 running sonarEffect;-o-animation:1.3s ease-out 3ms normal none 1 running sonarEffect;animation-iteration-count:infinite}
@keyframes sonarEffect{0{opacity:.3;-khtml-opacity:.3;-webkit-opacity:.3;-moz-opacity:.3}
40%{box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);-moz-box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);-webkit-box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);opacity:.5;-khtml-opacity:.5;-webkit-opacity:.5;-moz-opacity:.5}
100%{box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);-moz-box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);-webkit-box-shadow:0 0 0 2px rgba(255,255,255,0.1),0 0 10px 10px #ff5824,0 0 0 10px rgba(255,255,255,0.5);opacity:0;-khtml-opacity:0;-webkit-opacity:0;-moz-opacity:0;transform:scale(1.5);-webkit-transform:scale(1.5);-ms-transform:scale(1.5);-o-transform:scale(1.5);-moz-transform:scale(1.5)}
}
@media(max-width:767px){.btn-back-to-top{width:40px;height:40px;bottom:30px;right:30px}
}