标准盒模型和怪异盒模型的差异

 .w3c{
            width: 100px;
            height: 100px;
            padding: 5px;
            margin: 5px;
            border: 5px solid black;
            background: lightcoral;
        }

    <div class="w3c">

    </div>

       .ie{
            width: 100px;
            height: 100px;
            padding: 5px;
            margin: 5px;
            border: 5px solid black;
            background: lightgreen;
            box-sizing: border-box;
        }

    <div class="ie">

    </div>