<html>
<head>
<style>
div {
border: 1px solid black;
margin-top: 100px;
margin-bottom: 100px;
margin-right: 150px;
margin-left: 80px;
background-color: lightblue;
}
</style>
</head>
<body>
<h2>使用单独的边距属性</h2>
<div>这个div元素的上外边距为100px,右外边距为150px,下外边距为100px,左外边距为80px。</div>
</body>
</html>