.index_left_mid{ float:left; width:725px;}
.top2_left{ float:left; width:272px;}
.top2_mid,.main_mid{ float:right; width:437px;}
.top2_right{ float:right; width:272px;}
.clearfix{clear:both;}
.content{margin:20px 51px 0;width:900px;overflow:hidden;}
.normal{width:900px !important;}