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                                  CSS3 多媒体查询实例本章节我们将为大家演示一些多媒体查询实例。 开始之前我们先制作一个电子邮箱的链接列表。HTML 代码如下: 
	
		
			| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | <!DOCTYPE html> <html> <head> <style> ul {     list-style-type: none; } ul li a {     color: green;     text-decoration: none;     padding: 3px;     display: block; } </style> </head> <body> <ul>   <li><a data-email="johndoe@example.com" href="mailto:johndoe@example.com">John Doe</a></li >   <li><a data-email="marymoe@example.com" href="mailto:marymoe@example.com">Mary Moe</a></li >   <li><a data-email="amandapanda@example.com" href="mailto:amandapanda@example.com">Amanda Panda</a>< /li> </ul> </body> </html> |  注意 data-email 属性。在 HTML 中我们可以使用带 data- 前缀的属性来存储信息。 520 到 699px 宽度 - 添加邮箱图标当浏览器的宽度在 520 到 699px, 邮箱链接前添加邮件图标: 
	
		
			| 1 2 3 4 5 6 | @media screen and (max-width: 699px) and (min-width: 520px) {     ul li a {         padding-left: 30px;         background: url(email-icon.png) left center no-repeat;     } } |  700 到 1000px - 添加文本前缀信息当浏览器的宽度在 700 到 1000px, 会在邮箱链接前添加 "Email: ": 
	
		
			| 1 2 3 4 5 6 7 | @media screen and (max-width: 1000px) and (min-width: 700px) {     ul li a:before {         content: "Email: ";         font-style: italic;         color: #666666;     } } |  大于 1001px 宽度 - 添加邮件地址当浏览器的宽度大于 1001px 时,会在链接后添加邮件地址接。 我们会使用 data- 属性来为每个人名后添加邮件地址: 
	
		
			| 1 2 3 4 5 6 7 8 | @media screen and (min-width: 1001px) {     ul li a:after {         content: " (" attr(data-email) ")";         font-size: 12px;         font-style: italic;         color: #666666;     } } |  大于 1151px 宽度 - 添加图标当浏览器的宽度大于 1001px 时,会在人名前添加图标。 实例中,我们没有编写额外的查询块,我们可以在已有的查询媒体后使用逗号分隔来添加其他媒体查询 (类似 OR 操作符): 
	
		
			| 1 2 3 4 5 6 | @media screen and (max-width: 699px) and (min-width: 520px), (min-width: 1151px) {     ul li a {         padding-left: 30px;         background: url(email-icon.png) left center no-repeat;     } } |  代码 
	
		
			| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | <!DOCTYPE html> <html> <head>     <style>         ul {             list-style-type: none;         }         ul li a {             color: green;             text-decoration: none;             padding: 3px;             display: block;         }         @media screen and (max-width: 699px) and (min-width: 520px) {             ul li a {                 padding-left: 30px;                 background: url(email-icon.png) left center no-repeat;             }         }         @media screen and (max-width: 1000px) and (min-width: 700px) {             ul li a:before {                 content: "Email: ";                 font-style: italic;                 color: #666666;             }         }         @media screen and (min-width: 1001px) {             ul li a:after {                 content: " (" attr(data-email) ")";                 font-size: 12px;                 font-style: italic;                 color: #666666;             }         }         @media screen and (max-width: 699px) and (min-width: 520px), (min-width: 1151px) {             ul li a {                 padding-left: 30px;                 background: url(email-icon.png) left center no-repeat;             }         }     </style> </head> <body>     <ul>         <li><a data-email="johndoe@example.com" href="mailto:johndoe@example.com">John Doe</a></li>3         <li><a data-email="marymoe@example.com" href="mailto:marymoe@example.com">Mary Moe</a></li>         <li><a data-email="amandapanda@example.com" href="mailto:amandapanda@example.com">Amanda Panda</a></li>     </ul> </body> </html> |  
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