.m_back{
	clear:both;
	background:url(images/background/main_bg2.png) repeat-y #e6ffd2 top center;
}
.top_photo{
	width:1100px;
	margin:0px auto;
	background:url(images/photo/project.png) no-repeat top center;
}
.l_menu{
	width:235px;
	float:left;
}
.l_menu dl{
	margin-top:120px;
}
.l_banner{
	margin-top:30px
}
.top_r_block{
	width:840px;
	float:right;
	margin-top:280px;
	text-align:left;
}
.news_li{
	padding: 10px 0px 10px 0px;
	border-bottom: 1px dotted #777777;
	width:840px;
}
.news_dl{
	padding:0px 0px;
}
.news_dl dt{
	padding: 0px 0px 0px 30px;
	text-align:left;
}
.news_dl dd{
	padding: 0px 0px 0px 40px;
	text-align:left;
}