.nav { font-size: 12px; width: 613px; margin: 0px auto 0; height: 36px; line-height: 36px; position: relative; z-index: 1; }
    .nav a { text-decoration: none; }
.navmain { height: 36px; padding: 0 5px; position: relative; }
#nav_all { height: 36px; float: left; line-height: 36px; position: relative; z-index: 222; }
    #nav_all li { text-align: center; float: left; }
        #nav_all li a { color: #000; display: inline-block; font-size: 13px; font-weight: bold; cursor: pointer; padding: 0 20px 0 20px; _padding: 0 8px; height: 36px; line-height: 36px; white-space: nowrap; }
            #nav_all li a:hover { height: 32px; line-height: 32px; border-top: 4px solid #639ACA; overflow: hidden; color:#004b90 }
        #nav_all li ul { display: none; position: absolute; z-index: 99; width: 980px; left: -6px; top: 36px; }
    #nav_all ul li { background-image: none; line-height: 32px; height: 32px; padding-top: 0px; padding: 0; }
        #nav_all ul li a { background-image: none; padding: 0px 10px; margin: 0px; height: 32px; line-height: 32px; color: #fff; font-weight: normal; background: #639ACA; border: none; }
            #nav_all ul li a:hover { background-image: none; padding: 0px 10px; margin: 0px auto; height: 32px; line-height: 32px; color: #FFF; background: #004b90; border-top: none; }