lovecoding
/
VIP22


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      margin: 0;
      padding: 0;
    }
    h3{
      width: 980px;
      height: 50px;
      background: #ccc;
      text-align: center;
      line-height: 50px;
      margin: 0 auto 10px;
    }
    #content{
      width: 980px;
      margin: 10px auto;
      overflow: hidden;

    }
    #left{
      width: 630px;
      height: 300px;
      background: red;
      float: left;
    }
    #right{
      width: 340px;
      height: 300px;
      background: blue;
      float: right;
    }
    #imgBox{
      width: 980px;
      height: 500px;
      background: url(img/1.jpg) 0 0 no-repeat;
      background-size: 100%;
      margin: 0 auto
    }
    @media screen and (max-width: 980px) {
      h3{
        width: 100%;
      }
      #content{
        width: 100%;
      }
      #left{
        width: 65%;
      }
      #right{
        width: 34%;
      }
      #imgBox{
        width: 100%;
        background-image: url(img/2.jpg);
        height: 0;
        padding-top: 56%;
      }
    }
    @media screen and (max-width: 480px) {
      #left{
        width: 100%;
        float: none;
      }
      #right{
        width: 100%;
        float: none;
      }
      #imgBox{
        background-image: url(img/3.jpg);
      }
    }
  </style>
</head>
<body>
  <h3>页眉</h3>
  <h3>导航</h3>
  <div id="imgBox"></div>
  <div id="content">
    <div id="left"></div>
    <div id="right"></div>
  </div>
  <h3>页尾</h3>
</body>
</html>