语法:
@media :<sMedia> { sRules }
取值:
- <sMedia>:
 - 指定设备名称。请参阅附录:设备类型
 - {sRules}:
 - 样式表定义。
 
说明:
判断媒介(对象)类型来实现不同的展现。此特性让CSS可以更精确作用于不同的媒介类型,同一媒介的不同条件(分辨率、色数等等).
media_query: [only | not]? <media_type> [ and <expression> ]* expression: ( <media_feature> [: <value>]? ) media_type: all | aural | braille | handheld | print | projection | screen | tty | tv | embossed media_feature: width | min-width | max-width | height | min-height | max-height | device-width | min-device-width | max-device-width | device-height | min-device-height | max-device-height | device-aspect-ratio | min-device-aspect-ratio | max-device-aspect-ratio | color | min-color | max-color | color-index | min-color-index | max-color-index | monochrome | min-monochrome | max-monochrome | resolution | min-resolution | max-resolution | scan | grid
兼容性:
| 类型 |  Internet Explorer | 
				   Firefox | 
				   Chrome | 
				   Opera | 
				   Safari | 
				
|---|---|---|---|---|---|
| 版本 | (×)IE6 | (×)Firefox 2.0 | (√)Chrome 1.0.x | (√)Opera 9.63 | (√)Safari 3.1 | 
| (×)IE7 | (×)Firefox 3.0 | (√)Chrome 2.0.x | (√)Safari 4 | ||
| (×)IE8 | (√)Firefox 3.5 | ||||
示例:
    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>media queries</title>
</head>
<style>
div.example{background-color: #cee;}
@media all and (min-width: 640px) {
	div.example {
		background-color: #cff;
	}
}
@media screen and (max-width: 1100px) {
	div.example {
		background-color: #c00;
	}
}
</style>
<body>
<div class="example">
这是一个背景色例子 -_-!!!
</div>
</body>
</html>
 
			
Internet Explorer
Firefox
Chrome
Opera
Safari