利用content为伊特元素追加三个小点

<span class="seven"></span>
<style type="text/css">
	.seven:after{
		 50px;
		height: 30px;
		display: inline-block;
		background-color: #188eee;
		content: '...';
		color: #fff;
		font-size: 30px;
		letter-spacing: 5px;
		text-align: center;
		line-height: 14px;
	}
</style>