columns属性在CSS多列中是比较常用的，columns属性是一个简写属性，用于设置列宽和列数。
语法
columns: column-width column-count;
属性值：
column-width 列的宽度。
column-count 列数。
浏览器支持：
示例：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>CSS columns属性</title>
<style>
body {
font: 14px/1.5 georgia, serif, sans-serif;
}
p {
margin: 0;
padding: 5px 10px;
background: #eee;
}
h1 {
margin: 10px 0;
font-size: 16px;
}
.test {
width: 628px;
border: 10px solid #000;
-moz-columns: 200px 3;
-webkit-columns: 200px 3;
columns: 200px 3;
}
.test2 {
border: 10px solid #000;
-moz-columns: 200px;
-webkit-columns: 200px;
columns: 200px;
}
</style>
</head>
<body>
<h1>列数及列宽固定:</h1>
<div>
<p>
This module describes multi-column layout in CSS. By using functionality described in this document,
style sheets can declare that the content of an element is to be laid out in multiple columns.
</p>
<p>
On the Web, tables have also been used to describe multi-column layouts. The main benefit of using
CSS-based columns is flexibility; content can flow from one column to another, and the number of
columns can vary depending on the size of the viewport. Removing presentation table markup from
documents allows them to more easily be presented on various output devices including speech
synthesizers and small mobile devices.
</p>
</div>
<h1>列宽固定，根据容器宽度液态分布列数:</h1>
<div>
<p>
This module describes multi-column layout in CSS. By using functionality described in this document,
style sheets can declare that the content of an element is to be laid out in multiple columns.
</p>
<p>On the Web, tables have also been used to describe multi-column layouts. The main benefit of
using CSS-based columns is flexibility; content can flow from one column to another, and the number
of columns can vary depending on the size of the viewport. Removing presentation table markup
from documents allows them to more easily be presented on various output devices including speech
synthesizers and small mobile devices.
</p>
</div>
</body>
</html>效果图：
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