.main{text-align:center;letter-spacing:.2em;cursor:pointer;position:relative;overflow:hidden;background:var(--themeColor);color:#fff}.main .mod{border-radius:50%;background:var(--clickColor);position:absolute;-webkit-animation:bian .3s linear 1 both;animation:bian .3s linear 1 both}@-webkit-keyframes bian{0%{opacity:1;-webkit-transform:scale(1);transform:scale(1)}to{opacity:0;-webkit-transform:scale(18);transform:scale(18)}}@keyframes bian{0%{opacity:1;-webkit-transform:scale(1);transform:scale(1)}to{opacity:0;-webkit-transform:scale(18);transform:scale(18)}}