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代码编辑器：

<!DOCTYPE html>
<meta charset="utf-8"><link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> 
<style>
div.img {
    border: 1px solid #ccc;
}
div.img:hover {
    border: 1px solid #777;
}
div.img img {
    width: 100%;
    height: auto;
}
div.desc {
    padding: 15px;
    text-align: center;
}
* {
    box-sizing: border-box;
}
.responsive {
    padding: 0 6px;
    float: left;
    width: 24.99999%;
}
@media only screen and (max-width: 700px){
    .responsive {
        width: 49.99999%;
        margin: 6px 0;
    }
}
@media only screen and (max-width: 500px){
    .responsive {
        width: 100%;
    }
}
.clearfix:after {
    content: "";
    display: table;
    clear: both;
}
</style>
<h2 style="text-align:center">响应式图片相册</h2>
<div class="responsive">
  <div class="img">
    <a target="_blank" href="img_fjords.jpg">
      <img src="/static/i/css/img_fjords.jpg" alt="Trolltunga Norway" width="300" height="200">
    </a>
    <div class="desc">Add a description of the image here</div>
  </div>
</div>
<div class="responsive">
  <div class="img">
    <a target="_blank" href="img_forest.jpg">
      <img src="/static/i/css/img_forest.jpg" alt="Forest" width="600" height="400">
    </a>
    <div class="desc">Add a description of the image here</div>
  </div>
</div>
<div class="responsive">
  <div class="img">
    <a target="_blank" href="img_lights.jpg">
      <img src="/static/i/css/img_lights.jpg" alt="Northern Lights" width="600" height="400">
    </a>
    <div class="desc">Add a description of the image here</div>
  </div>
</div>
<div class="responsive">
  <div class="img">
    <a target="_blank" href="img_mountains.jpg">
      <img src="/static/i/css/img_mountains.jpg" alt="Mountains" width="600" height="400">
    </a>
    <div class="desc">Add a description of the image here</div>
  </div>
</div>
<div class="clearfix"></div>
<div style="padding:6px;">
  
  <h4>重置浏览器大小查看效果</h4>
</div>
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代码编辑器：

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