<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box1{
width: 200px;
height: 200px;
background-color: orange;
}
.box2{
width: 200px;
height: 200px;
background-color: red;
/* 隐藏，彻底放弃了位置 */
/* display: none; */
/* 隐藏，不放弃位置 */
visibility: hidden;
}
.box3{
width: 200px;
height: 200px;
background-color: blue;
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
</body>
</html>