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HomeWeb Front-endHTML TutorialCSS3 @media 查询_html/css_WEB-ITnose

### 定义和使用使用 @media 查询,你可以针对不同的媒体类型定义不同的样式。@media 可以针对不同的屏幕尺寸设置不同的样式,特别是如果你需要设置设计响应式的页面,@media 是非常有用的。当你重置浏览器大小的过程中,页面也会根据浏览器的宽度和高度重新渲染页面。### 浏览器支持表格中的数字表示支持 @media 规则的第一个浏览器的版本号。![输入图片说明](https://static.oschina.net/uploads/img/201603/02172257_ik4C.png "在这里输入图片标题")### CSS 语法```@media mediatype and|not|only (media feature) {    CSS-Code;}```你也可以针对不同的媒体使用不同 stylesheets :```<link rel="stylesheet" media="mediatype and|not|only (media feature)" href="mystylesheet.css">```### 媒体类型(mediatype)|值	  |描述||-|-||all	  |用于所有设备||aural	  |已废弃。用于语音和声音合成器||braille  |	已废弃。 应用于盲文触摸式反馈设备||embossed |	已废弃。 用于打印的盲人印刷设备||handheld |	已废弃。 用于掌上设备或更小的装置,如PDA和小型电话||print	  |用于打印机和打印预览||projection|	已废弃。 用于投影设备||screen	  |用于电脑屏幕,平板电脑,智能手机等。||speech	|应用于屏幕阅读器等发声设备||tty	|已废弃。 用于固定的字符网格,如电报、终端设备和对字符有限制的便携设备||tv	|已废弃。 用于电视和网络电视|### 媒体功能(media feature)|值|	描述||-|-||aspect-ratio|	定义输出设备中的页面可见区域宽度与高度的比率||color|	定义输出设备每一组彩色原件的个数。如果不是彩色设备,则值等于0||color-index|	定义在输出设备的彩色查询表中的条目数。如果没有使用彩色查询表,则值等于0||device-aspect-ratio|	定义输出设备的屏幕可见宽度与高度的比率。||device-height|	定义输出设备的屏幕可见高度。||device-width	|定义输出设备的屏幕可见宽度。||grid|	用来查询输出设备是否使用栅格或点阵。||height|	定义输出设备中的页面可见区域高度。||max-aspect-ratio|	定义输出设备的屏幕可见宽度与高度的最大比率。||max-color|	定义输出设备每一组彩色原件的最大个数。||max-color-index|	定义在输出设备的彩色查询表中的最大条目数。||max-device-aspect-ratio|	定义输出设备的屏幕可见宽度与高度的最大比率。||max-device-height|	定义输出设备的屏幕可见的最大高度。||max-device-width|	定义输出设备的屏幕最大可见宽度。||max-height	|定义输出设备中的页面最大可见区域高度。||max-monochrome	|定义在一个单色框架缓冲区中每像素包含的最大单色原件个数。||max-resolution	|定义设备的最大分辨率。||max-width	|定义输出设备中的页面最大可见区域宽度。||min-aspect-ratio|	定义输出设备中的页面可见区域宽度与高度的最小比率。||min-color	|定义输出设备每一组彩色原件的最小个数。||min-color-index|	定义在输出设备的彩色查询表中的最小条目数。||min-device-aspect-ratio|	定义输出设备的屏幕可见宽度与高度的最小比率。||min-device-width|	定义输出设备的屏幕最小可见宽度。||min-device-height|	定义输出设备的屏幕的最小可见高度。||min-height|	定义输出设备中的页面最小可见区域高度。||min-monochrome|	定义在一个单色框架缓冲区中每像素包含的最小单色原件个数||min-resolution|	定义设备的最小分辨率。||min-width	|定义输出设备中的页面最小可见区域宽度。||monochrome	|定义在一个单色框架缓冲区中每像素包含的单色原件个数。如果不是单色设备,则值等于0||orientation	|定义输出设备中的页面可见区域高度是否大于或等于宽度。||resolution	|定义设备的分辨率。如:96dpi, 300dpi, 118dpcm||scan	|定义电视类设备的扫描工序。||width	|定义输出设备中的页面可见区域宽度。|

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