两栏布局 LazyGreedy
这种布局使用一个浮动列于没有限定宽度创建一个两列布局。在这个例子中左侧边栏是懒惰，因为它需要的，因为它不仅占用了尽可能多的空间。以另一种说法是，左侧边栏是“收缩包装。” 正确的内容栏是贪婪，因为它占用了所有的剩余空间。
HTML：
<div class="sidebar">
<h1>Sidebar</h1>
<img src="http://lorempixel.com/150/200/" />
</div>
<div class="content">
<h1>Content</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec odio. Praesent libero. Sed cursus ante dapibus diam. Sed nisi. Nulla quis sem at nibh elementum imperdiet. Duis sagittis ipsum. Praesent mauris. Fusce nec tellus sed augue semper porta. Mauris massa. Vestibulum lacinia arcu eget nulla. </p>
<p>Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Curabitur sodales ligula in libero. Sed dignissim lacinia nunc. Curabitur tortor. Pellentesque nibh. Aenean quam. In scelerisque sem at dolor. Maecenas mattis. Sed convallis tristique sem. Proin ut ligula vel nunc egestas porttitor. Morbi lectus risus, iaculis vel, suscipit quis, luctus non, massa. Fusce ac turpis quis ligula lacinia aliquet. Mauris ipsum. Nulla metus metus, ullamcorper vel, tincidunt sed, euismod in, nibh. </p>
</div>
CSS：
.sidebar {
/* `display:table;` shrink-wraps the column */
display:table;
float:left;
background-color:blue;
}
.content {
/* `overflow:hidden;` prevents `.content` from flowing under `.sidebar` */
overflow:hidden;
background-color:yellow;
}