css3 @media 实现响应式布局_html/css_WEB-ITnose

<link rel="stylesheet" media="screen and (max-width: 1024px)" href="middle.css" /><link rel="stylesheet" media="screen and (max-width: 600px)" href="small.css" />

.first {background-color: white;}.second {background-color: black;}@media screen and (max-width: 800px) { /*当屏幕尺寸小于800px时，应用下面的CSS样式*/    .first {background-color: green;}    .second {background-color: skyblue;}}@media screen and (max-width: 480px) { /*当屏幕尺寸小于480px时，应用下面的CSS样式*/    .first {background-color: yellow;}    .second {background-color: red;}}