版权声明：哼！坏人！这是我辛辛苦苦码的！ https://blog.csdn.net/DurianPudding/article/details/87936216
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>流式布局</title>
<style>
.main {
width: 200px;
height: 150px;
background-color: black;
display: flex;
flex-flow: row wrap;
align-content: flex-start;
}
.item {
/*
假如需要并排放置两个带边框的框，可通过将 box-sizing 设置为 "border-box"。
这可令浏览器呈现出带有指定宽度和高度的框，并把边框和内边距放入框中。
*/
box-sizing: border-box;
background-color: white;
height: 50px;
border: 1px solid red;
/*
宽度占比25%，不伸缩
*/
flex: 0 0 25%;
}
</style>
</head>
<body>
<h2>流式布局</h2>
<p>每行的项目数固定，会自动分行</p>
<div class="main">
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
</div>
</body>
</html>