效果：
代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Document</title>
<style type="text/css">
/* 去掉默认样式，设置新的样式 */
.select-style{
position: relative;
display: inline-block;
}
.select-style select{
display:inline-block;
box-sizing:border-box;
background:none;
border:1px solid #222;
outline:none;
-webkit-appearance:none;
padding:5px 15px 5px 5px;
line-height:inherit;
color:inherit;
cursor:pointer;
font-size:14px;
position:relative;
z-index:3;
height:100%;
border-radius:2px;
}
.select-style:after{
content:'*';
color:red;
position:absolute;
top: 0;
bottom:0;
right:5px;
height:100%;
padding:5px 0;
}
.select-style select option{
color:#222;
}
.select-style select option:hover{
background:#535353;
color:#fff;
}
.select-style select option:checked{
background:#535353;
color:#fff;
}
</style>
</head>
<body>
<!-- html 布局 -->
<span class="select-style">
<select>
<option>option 1</option>
<option>option 2</option>
<option>option 3</option>
<option>option 4</option>
<option>option 5</option>
</select>
</span>
</body>
</html>
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