<!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>css</title>
<style>
.father {
/* 父盒子相对定位 */
position: relative;
width: 90px;
height: 90px;
background-color: red;
}
.son {
/* 子盒子绝对定位 */
position: absolute;
right: -8px;
top:-8px;
width: 20px;
height: 20px;
background-color: green;
}
</style>
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
</body>
</html>
运行图片：
标签：盒子,color,子绝,width,background,父相 From： https://www.cnblogs.com/huguo/p/17286525.html