div, ul, li { margin: 0; padding: 0,200px,0,0; border: 0;}
ul, li { list-style-type: none;}
.nav { font-size: 12px; width: 980px; margin: 5px auto 0;  height: 33px; line-height: 33px; position: relative; z-index: 1;}
    .nav a { text-decoration: none; }
.navmain { height: 33px; padding: 0 130px; position: relative; }
#nav_all { height: 33px; float: center; line-height: 33px; position: relative; z-index: 222; }
    #nav_all li { text-align: center; float: left; }
        #nav_all li a { color: #FFF; display: inline-block; font-size: 18px; font-weight: bold; cursor: pointer; padding: 0 25px 0 0px; _padding: 0 2px; height: 33px; line-height: 30px; white-space: nowrap; }
            #nav_all li a:hover { background: url(imagesbird.png) center 25px no-repeat; height: 30px; line-height: 30px; border-bottom: 3px solid #FFF; overflow: hidden; text-decoration:none }
        #nav_all li ul { display: none; position: absolute; z-index: 99; width: 970px; left: -6px; top: 35px; }
    #nav_all ul li { background-image: none; line-height: 30px; 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: #639ACA; border-top: none; }