三角

这样....可以画个三角

.filters .select::after {
		content: "";
		position: relative;
		display: inline-block;
		width: 0;
		height: 0;
		border-width: 5px;
		border-style: solid;
		border-color: #999999 transparent transparent transparent;
		right: -3px;
		top: 3px;
	}