​x
 
<!DOCTYPE html>
<html>
<head>
<style> 
select {
  width: 100%;
  padding: 16px 20px;
  border: none;
  border-radius: 4px;
  background-color: #f1f1f1;
}
</style>
</head>
<body>
​
<p>有样式的选择菜单：</p>
​
<form>
  <select id="country" name="country">
  <option value="au">Australia</option>
  <option value="ca">Canada</option>
  <option value="usa">USA</option>
  </select>
</form>
​
</body>
</html>
​