栅格系统
Document
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
[class^=col] {
float: left;
}
.col25 {
width: 25%;
background-color: aqua;
}
.col50 {
width: 50%;
background-color: blue;
}
.col75 {
width: 75%;
background-color: red;
}
</style>
</head>
<body>
<div>
<h2>1</h2>
<div class="col25">A</div>
<div class="col25">A</div>
<div class="col25">A</div>
<div class="col25">A</div>
<h2>2</h2>
<div class="col25">A</div>
<div class="col25">A</div>
<div class="col50">B</div>
<h2>3</h2>
<div class="col25">A</div>
<div class="col50">B</div>
<div class="col25">A</div>
<h2>4</h2>
<div class="col50">B</div>
<div class="col25">A</div>
<div class="col25">A</div>
<h2>5</h2>
<div class="col75">C</div>
<div class="col25">A</div>
<h2>6</h2>
<div class="col25">A</div>
<div class="col75">C</div>
</div>
</body> </html>
1
A
A
A
A
2
A
A
B
3
A
B
A
4
B
A
A
5
C
A
6
A
C
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