div, ul, li { margin: 0; padding: 0; border: 0; }
ul, li { list-style-type: none; text-transform: capitalize; }
.nav { font-size: 12px; width: 1264px; margin: 0px auto 0;  height: 46px; line-height: 46px; position: relative; z-index: 1; }
    .nav a { text-decoration: none; }
.navmain { height: 46px; padding: 0; background: #FFF url(../images/nav-bg.jpg) repeat-x 0 top; position: relative; }
#nav_all { height: 46px; float: left; line-height: 46px; position: relative; z-index: 222; }
    #nav_all li { text-align: center; float: left; background: url(../images/cd_line.jpg) no-repeat right top; }
        #nav_all li a {
 color: #000;
 display: inline-block;
 font-size: 16px;
 cursor: pointer;
 height: 46px;
 line-height: 46px;
 white-space: nowrap;
 font-family: "微软雅黑";

 width: 135px;
 padding-top: 0;
 padding-right: 0px;
 padding-bottom: 0;
 padding-left: 0px;
 text-align: center;
}
            #nav_all li a:hover { height: 46px; line-height: 46px; overflow: hidden; }
        #nav_all li ul { display: none; position: absolute; z-index: 99; width: 1264px; left:0px; top: 46px; height:80px; padding:10px 0; background-image:url(../images/bj.jpg); display:black; background:#3c8abb; filter:alpha(opacity:50); opacity:0.8; -moz-opacity:0.7;-khtml-opacity: 0.7;}
    #nav_all ul li { background-image: none; line-height: 28px; height: 28px; padding-top: 0px; padding: 0; }
        #nav_all ul li a { background-image: none; padding: 0px 10px; margin: 0px; font-size: 14px; height: 28px; line-height: 28px; color: #fff; font-weight: normal; border: none; }
            #nav_all ul li a:hover { background-image: none; padding: 0px 10px; margin: 0px auto; height: 28px; line-height: 28px; color: #FFF; background: #639ACA; border-top: none; }