盒模型常用的属性与盒子大小 -

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒模型</title>
</head>
<body>
    <div class="box">box</div>
</body>
</html>
<style>
    .box{
        width: 200px;
        height: 150px;
        border: 8px solid blue;
        padding: 20px;
        background-color: red;
        background-clip: content-box;
        margin: 10px;
        box-sizing: content-box;
        box-sizing: border-box;
    }
</style>