<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
div.father {
background: #fffebb;
text-align: center;
font-family: Cambria, "Hoefler Text", "Liberation Serif", Times, "Times New Roman", "serif";
font-size: 12px;
padding: 10px;
border: 1px solid #000;
height: 40px;
}
div.son {
background: #a2d2ff;
margin-top: 30px;
margin-bottom: 0px;
padding: 15px;
border: 1px dashed #004993;
}
</style>
</head>
<body>
<div class="father">
<div class="son">子div</div>
</div>
</body>
</html>
