代码示例：（标识：css_image_gallery_responsive）
<!DOCTYPE html>
<html>
<head>
<style>
div.gallery {
border: 1px solid #ccc;
}
div.gallery:hover {
border: 1px solid #777;
}
div.gallery 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>
</head>
<body>
<h1>响应式图片库</h1>
<h2>请调整窗口大小来查看效果。</h2>
<div class="responsive">
<div class="gallery">
<a target="_blank" href="/static/demo/images/tulip-yellow.jpg">
<img src="/static/demo/images/tulip-yellow.jpg" alt="黄色郁金香" width="600" height="400">
</a>
<div class="desc">在此处添加图像描述</div>
</div>
</div>
<div class="responsive">
<div class="gallery">
<a target="_blank" href="/static/demo/images/tulip-red.jpg">
<img src="/static/demo/images/tulip-red.jpg" alt="红色郁金香" width="600" height="400">
</a>
<div class="desc">在此处添加图像描述</div>
</div>
</div>
<div class="responsive">
<div class="gallery">
<a target="_blank" href="/static/demo/images/flower-1.jpg">
<img src="/static/demo/images/flower-1.jpg" alt="花花草草" width="600" height="400">
</a>
<div class="desc">在此处添加图像描述</div>
</div>
</div>
<div class="responsive">
<div class="gallery">
<a target="_blank" href="/static/demo/images/flower-2.jpg">
<img src="/static/demo/images/flower-2.jpg" alt="花花草草" width="600" height="400">
</a>
<div class="desc">在此处添加图像描述</div>
</div>
</div>
<div class="clearfix"></div>
<div style="padding:6px;">
<p>本例使用媒体查询来重新排列不同屏幕尺寸的图像：对于宽于 700 像素的屏幕，它将并排显示四幅图像；对于小于 700 像素的屏幕，将并排显示两幅图像。对于小于 500 像素的屏幕，图像将垂直堆叠（100％）。</p>
<p>您稍后将在我们的 CSS 教程中学到有关媒体查询和响应式 Web 设计的更多知识。</p>
</div>
</body>
</html>
