.page-top-btn{bottom:10px;opacity:0;pointer-events:none;position:fixed;right:10px;-webkit-transform:translateY(10px);-ms-transform:translateY(10px);transform:translateY(10px);-webkit-transition:opacity .3s ease,-webkit-transform .3s ease;transition:opacity .3s ease,-webkit-transform .3s ease;transition:opacity .3s ease,transform .3s ease;transition:opacity .3s ease,transform .3s ease,-webkit-transform .3s ease;z-index:100}.page-top-btn.is-visible{opacity:1;pointer-events:auto;-webkit-transform:translateY(0);-ms-transform:translateY(0);transform:translateY(0)}.page-top-btn a{-webkit-box-align:center;-ms-flex-align:center;align-items:center;background:#666;border-radius:50%;color:#fff;display:-moz-flex;display:-ms-flex;display:-o-flex;display:-webkit-box;display:-ms-flexbox;display:flex;height:50px;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;width:50px}