.n_about{width:100%; height:auto; overflow:hidden; display:block; margin-top:30px}
.n_about_l{width:570px; float:left; height:auto; overflow:hidden}
.n_about_r{width:570px; float:right; height:auto; overflow:hidden}
.n_wh{width:1160px; padding:30px; background-color:#f2f2f2; height:auto; overflow:hidden; margin-top:60px}
.n_wh_l{width:240px; float:left}
.n_wh_r{width:900px; float:right}
.n_wh_r ul li{width:370px; float:left; margin-left:20px; margin-top:25px}
.n_wh_r ul li span{font:bold 18px/30px "微软雅黑"; color:#c40202; display:block}