圣杯布局就是三栏布局，左右两栏固定，中间一栏自适应
image.png
image.png
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="练习.css">
<title>Document</title>
</head>
<body>
<div class="box">
<div class="center">ascsdcs.c,;cs,;s,c'asc,ascsdcs.c,;cs,;s,c'asc,
ascsdcs.c,;cs,;s,c'asc,ascsdcs.c,;cs,;s,c'asc,ascsdcs.c,;cs,;s,c'asc,
ascsdcs.c,;cs,;s,c'asc,ascsdcs.c,;cs,;s,c'asc,ascsdcs.c,;cs,;s,c'asc,
</div>
<div class="left">1</div>
<div class="right">2</div>
</div>
</body>
</html>
*{
margin: 0;
padding: 0;
list-style: none;
font: normal;
}
.box{
width: 800px;
min-width: 300px;
background: purple;
padding: 0 100px;
margin: 0 auto;
overflow: hidden;
}
.center{
width: 100%;
height: 100px;
background: blue;
float: left;
}
.left,.right{
width: 100px;
height: 100px;
background: red;
float: left;
}
.left{
margin-left: -100%;
position: relative;
left: -100px;
}
.right{
margin-left: -100px;
position: relative;
left: 100px;
}
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