SOURCE

<div id="box1">
			<div id="text">
				学习CSS很重要
			</div>
		</div>
		<div id="box2">
			盒子模型需要认真理解
		</div>

body{
				margin: 0;
				padding: 0;
			}
			#box1{
				background-color: #9cf;
				margin: 20px;
				border: 10px solid #039;
				padding: 40px;
				width: 200px;
			}
			#text{
				background-color: #fc0;
				height: 100px;
			}
			#box2{
				background-color: #ccc;
				margin: 5px;
				height: 100px;
				padding-left: 30px;
			}