<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
#parent{
background-color: red;
width: 300px;
height: 300px;
/*解决方式 1、为父盒子添加 overflow：hidden
2、为父盒子添加padding
3、为父盒子添加border
*/
overflow: hidden;
}
#child{
background-color: blueviolet;
width: 150px;
height: 150px;
margin: 0px auto;
/*居中*/
margin-top: 75px;
}
</style>
<title>嵌套的盒子</title>
</head>
<body>
<div id="parent">
<div id="child">
</div>
</div>
</body>
</html>
