.float{height:60px;font-size:30px;right:40px;color:#fff;position:fixed;bottom:40px;text-align:center;background-color:#25d366;box-shadow:2px 2px 3px #999;border-radius:50px;width:60px;z-index:100}.float:hover{animation:shake 1s;animation-iteration-count:infinite;text-decoration:none;color:#fff;background-color:#1ab152}.my-float{margin-top:16px}