案例：Foundation案例     状态：可编辑再运行    进入竖版
 运行结果　
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<!DOCTYPE html>
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<html>
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<head>
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  <title>Foundation 实例</title>
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  <meta charset="utf-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="/css/foundation5.5.3/foundation.min.css">
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  <script src="/js/bootstrap/jquery.min.js"></script>
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  <script src="/js/foundation5.5.3/foundation.min.js"></script>
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  <script src="/js/foundation5.5.3/modernizr.js"></script>
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</head>
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<body style="padding:20px">
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​
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<!-- Tiny Dropdown: max-width is 200px -->
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<a href="#" data-dropdown="id01" class="button dropdown">Tiny</a>
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<ul id="id01" data-dropdown-content class="f-dropdown tiny">
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  <li><a href="#">Link 1</a></li>
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  <li><a href="#">Link 2</a></li>
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  <li><a href="#">Link 3</a></li>
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</ul>
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<br>
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​
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<!-- Small Dropdown: max-width is 300px  -->
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<a href="#" data-dropdown="id02" class="button dropdown">Small</a>
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<ul id="id02" data-dropdown-content class="f-dropdown small">
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  <li><a href="#">Link 1</a></li>
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  <li><a href="#">Link 2</a></li>
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  <li><a href="#">Link 3</a></li>
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</ul>
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<br>
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​
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<!-- Medium Dropdown: max-width is 500px  -->
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<a href="#" data-dropdown="id03" class="button dropdown">Medium</a>
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<ul id="id03" data-dropdown-content class="f-dropdown medium">
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  <li><a href="#">Link 1</a></li>
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  <li><a href="#">Link 2</a></li>
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  <li><a href="#">Link 3</a></li>
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</ul>
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<br>
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​
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<!-- Large Dropdown: max-width is 800px  -->
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<a href="#" data-dropdown="id04" class="button dropdown">Large</a>
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<ul id="id04" data-dropdown-content class="f-dropdown large">
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  <li><a href="#">Link 1</a></li>
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  <li><a href="#">Link 2</a></li>
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  <li><a href="#">Link 3</a></li>
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</ul>
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<br>