效果演示
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>测试</title>
<style>
.box1 {
width: 60%;
height: 180px;
background: #e0c89b;
margin-inline: auto;
margin-bottom: 50px;
outline: 2px dashed blue;
outline-offset: -10px;
}
.box2 {
width: 60%;
height: 180px;
background: #9ee3d7;
margin-inline: auto;
outline: 2px dashed blue;
outline-offset: 10px;
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
</body>
</html>
