#main1{
	position: relative;
	margin: 0px auto 0px auto;
	top: 20px;
	width: 1100px;
	height: 900px;
	background-color: #aaffaa;
}
#network_img{
	position: absolute;
	top: 60px;
	left: 60px;
	width: 740px;
}
#pic1, #pic2, #pic3{
	position: absolute;
	left: 820px;
	width: 284px;
}
#pic1{top: 60px;}
#pic2{top: 270px;}
#pic3{top: 450px;}
li{
	left: 20px;
	width: 760px;
	font-size: 24px;
	line-height: 36px;
}