/*顶部导航宽度为：1200px时样式*/
#center_box .main{ padding-top: 10px; width: 1200px; margin: 0px auto; background: #fff;}
#header .top .cen_box{ width: 1200px;}
#header .center{width: 1200px;}
#header .center .right_box{ margin-left: 90px;}
#nav_box .nav_center ul{width: 1200px;}
#nav_box .nav_list li{ width: 133px;}