<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.c1{
200px;
height: 200px;
border: 10px solid red;
/*padding(内间距)/margin(外间距):top bottom left right*/
padding: 50px 50px 50px 50px;
margin-bottom: 20px;
}
.c2{
200px;
height: 200px;
display: inline-block;
}
.c3{
200px;
height: 200px;
background-color: yellow;
display: inline-block;
margin: -5px;
}
</style>
</head>
<body>
<div class="c1">huchangxi</div>
<div class="c2"></div>
<div class="c3"></div>
</body>
</html>