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@@ -0,0 +1,74 @@
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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 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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+ header, nav, footer {
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+ width: 100%;
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+ height: 80px;
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+ font-size: 24px;
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+ font-weight: bold;
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+ text-align: center;
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+ line-height: 80px;
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+ background: #ccc;
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+ margin-top: 10px;
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+ }
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+ .part1 {
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+ width: 100%;
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+ height: 150px;
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+ background: #f00;
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+ }
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+ .part2 {
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+ width: 100%;
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+ height: 150px;
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+ background: #00f;
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+ }
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+ @media screen and (max-width: 758px) {
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+ .picture {
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+ width: 100%;
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+ height: 300px;
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+ background: url("./images/3.jpg") no-repeat center center;
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+ }
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+ }
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+ @media screen and (min-width:768px) and (max-width: 1000px) {
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+ .picture {
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+ width: 100%;
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+ height: 500px;
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+ background: url("./images/1.jpg") no-repeat center center;
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+ margin-top: 10px;
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+ }
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+ .main {
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+ display: flex;
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+ }
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+ .part1 {
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+ flex: 3;
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+ }
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+ .part2 {
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+ flex: 2;
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+ margin-left: 15px;
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+ }
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+ }
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+ @media screen and (min-width: 1001px) {
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+ .picture {
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+ width: 100%;
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+ height: 500px;
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+ background: url("./images/2.jpg") no-repeat center center;
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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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+ <div>
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+ <header>页眉</header>
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+ <nav>导航</nav>
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+ <div class="picture"></div>
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+ <div class="main">
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+ <div class="part1"></div>
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+ <div class="part2"></div>
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+ </div>
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+ <footer>页尾</footer>
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+ </div>
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+</body>
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+</html>
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