#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50}.main .btn{position:fixed;z-index:1000;width:50px;height:50px;border-radius:50%;box-shadow:0 0 15px rgba(0,0,0,.5);border:2px solid #38cd7f;right:20px;transition:all .2s;opacity:0;display:flex;align-items:center;justify-content:center}.main .btn:hover{opacity:1}.main .btn:active{transform:scale(1.2)}.main .btn-isshow{bottom:120px;background-color:#fff}.main .btn-refresh{bottom:60px;background-color:#ff0}.main .btn-copy{bottom:180px;background-color:0}