<!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>
.father {
position: relative;
width: 400px;
height: 400px;
background-color: pink;
}
.son {
/* 相对, 绝对 */
/* 父级相对定位; 子级绝对定位 -- 子绝父相 */
/* position: relative; */
/* position: absolute; */
/* right: 100px; */
width: 300px;
height: 300px;
background-color: skyblue;
}
.sun {
position: absolute;
/* left: 20px;
top: 30px; */
right: 20px;
bottom: 50px;
width: 200px;
height: 200px;
background-color: green;
}
/* 绝对定位查找父级的方式: 就近找定位的父级, 如果逐层查找不到这样的父级, 就以浏览器窗口为参照进行定位 */
</style>
</head>
<body>
<div class="father">
<div class="son">
<div class="sun"></div>
</div>
</div>
</body>
</html>