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@@ -0,0 +1,91 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta http-equiv="X-UA-Compatible" content="IE=edge">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ *{
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+ margin: 0;
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+ padding: 0;
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+ }
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+ h3{
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+ width: 980px;
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+ height: 50px;
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+ background: #ccc;
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+ text-align: center;
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+ line-height: 50px;
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+ margin: 0 auto 10px;
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+ }
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+ #content{
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+ width: 980px;
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+ margin: 10px auto;
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+ overflow: hidden;
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+
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+ }
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+ #left{
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+ width: 630px;
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+ height: 300px;
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+ background: red;
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+ float: left;
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+ }
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+ #right{
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+ width: 340px;
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+ height: 300px;
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+ background: blue;
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+ float: right;
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+ }
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+ #imgBox{
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+ width: 980px;
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+ height: 500px;
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+ background: url(img/1.jpg) 0 0 no-repeat;
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+ background-size: 100%;
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+ margin: 0 auto
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+ }
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+ @media screen and (max-width: 980px) {
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+ h3{
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+ width: 100%;
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+ }
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+ #content{
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+ width: 100%;
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+ }
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+ #left{
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+ width: 65%;
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+ }
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+ #right{
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+ width: 34%;
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+ }
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+ #imgBox{
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+ width: 100%;
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+ background-image: url(img/2.jpg);
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+ height: 0;
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+ padding-top: 56%;
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+ }
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+ }
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+ @media screen and (max-width: 480px) {
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+ #left{
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+ width: 100%;
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+ float: none;
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+ }
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+ #right{
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+ width: 100%;
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+ float: none;
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+ }
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+ #imgBox{
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+ background-image: url(img/3.jpg);
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+ }
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+ }
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+ </style>
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+</head>
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+<body>
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+ <h3>页眉</h3>
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+ <h3>导航</h3>
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+ <div id="imgBox"></div>
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+ <div id="content">
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+ <div id="left"></div>
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+ <div id="right"></div>
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+ </div>
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+ <h3>页尾</h3>
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+</body>
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+</html>
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zsydgithub