.el-back-top{background-color:rgba(0,0,0,.45);position:fixed;right:100px;bottom:150px;width:40px;height:40px;border-radius:20px;cursor:pointer;-webkit-transition:.3s;transition:.3s;-webkit-box-shadow:0 0 6px rgba(0,0,0,.12);box-shadow:0 0 6px rgba(0,0,0,.12);z-index:5}.el-back-top:hover{background-color:rgba(0,0,0,.65)}.el-back-top i{color:#fff;display:block;line-height:40px;text-align:center;font-size:30px}.back-top-fade-enter,.back-top-fade-leave-active{-webkit-transform:translateY(-30px);transform:translateY(-30px);opacity:0}