<!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>
div {
width: 1000px;
height: 300px;
background-color: pink;
margin: 0 auto;
}
</style>
</head>
<body>
<!-- 版心: 网页的有效内容 -->
<!-- 版心居中 -->
<div>版心</div>
</body>
</html>html+css实战106-版心居中
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