*{
	margin: 0px;
	padding: 0px;
}

#introduce{
	width: 1000px;
	height: 680px;
	background-color: #f4f4f4;
	margin: auto;
}

h1{
	font-size: 2em;
	text-align: center;
}

li{
	list-style: none;
	font-size: 1em;
}

#pic1{
	margin-left: 60px;
	float: left;
	width: 361px;
	height: 237px;
}

#pic2{
	margin-left: 300px;
	float: left;
	width: 169px;
	height: 237px;
}

#pic-describe{
	text-align: center;
	font-size: 13px;
}