.nav { font-size: 12px; WIDTH: 688px;  height: 38px;line-height: 38px;  }
.nav a { text-decoration: none; }
.navmain { height: 38px; padding: 0 5px;}
#nav_all { height: 38px; float: left; line-height: 38px; position: relative; z-index: 222; }
#nav_all li { text-align: center; float: left; }
#nav_all li a { color: #424242; display: inline-block; font-size: 14px; font-weight: bold; cursor: pointer;  height: 38px; line-height: 38px; white-space: nowrap; width:113px; }
#nav_all li a:hover { background: url(../images/nav_bj.jpg) bottom no-repeat; height: 38px; line-height: 38px; color:#1f7ac9;}
#nav_all li ul { display: none; position: absolute; z-index: 99; width: 980px; left: -6px; top: 39px; }
#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: #5d5f5a; font-weight:bolder; background: #ddf3fe; border: none;filter:alpha(opacity=80);opacity:0.8;}
#nav_all ul li a:hover { background-image: none; padding: 0px 10px; margin: 0px auto; height: 32px; line-height: 32px; color: #FFF; background: #2e8cd4; border-top: none; }