原始CSS美化select下拉框option示例代码

<h2>Cars Select</h2>
<div class="select">
	<select name="cars">
		<option value="volvo">Volvo</option>
		<option value="saab">Saab</option>
		<option value="opel" selected>Opel</option>
		<option value="audi">Audi</option>
	</select>
</div><style>
body {
	font-size: 20px;
	color: #090;
	background-color: #eee;
	text-align: center;
}
.select {
	display: inline-block;
	width: 300px;
	position: relative;
	vertical-align: middle;
	padding: 0;
	overflow: hidden;
	background-color: #fff;
	color: #555;
	border: 1px solid #aaa;
	text-shadow: none;
	border-radius: 4px;	
	transition: box-shadow 0.25s ease;
	z-index: 2;
}
 
.select:hover {
	box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}
 
.select:before {
	content: "";
	position: absolute;
	width: 0;
	height: 0;
	border: 10px solid transparent;
	border-top-color: #ccc;
	top: 14px;
	right: 10px;
	cursor: pointer;
	z-index: -2;
}
.select select {
	cursor: pointer;
	padding: 10px;
	width: 100%;
	border: none;
	background: transparent;
	background-image: none;
	-webkit-appearance: none;
	-moz-appearance: none;
}
 
.select select:focus {
	outline: none;
}
</style>