效果展示：

话不多说，直接上代码

<p><img class="demo" src="../../img/pageimg/qyyw_icon1.png"></p>

@keyframes bouncing{
   0%  {transform: rotate(0deg)}
   100%{transform: rotate(360deg)}
}
.demo:hover{
   animation: bouncing 0.5s Linear 0s 1 alternate both;
}