<!DOCTYPE html>
<html>
<head>
<meta chatset="utf-8">
<title>flex 布局</title>
</head>
<style>
* { margin: 0; padding: 0;}
ul {
display: flex;
flex-flow: column wrap;
align-content: flex-start;
height: 440px;
background: teal;
}
li {
width: 200px;
height: 200px;
background: yellowgreen;
list-style:none;
margin: 10px;
font-size: 100px;
display: inline-flex;
justify-content: center;
align-items: center;
}
</style>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
</ul>
</body>
</html>
效果图
