div, ul, li{margin: 0;padding: 0;border: 0;}
ul, li{list-style-type: none;text-transform: capitalize;}
.nav{width: 100%;height: 42px;line-height: 42px;z-index: 1;color: #FFF;background: #3F4C6C;}
.nav a{text-decoration: none;}
.navmain{height: 42px;position: relative;width: 1000px;margin: 0 auto;}
#nav_all{height: 42px;float: left;line-height: 42px;position: relative;z-index: 222;}
#nav_all li{width: 140px;text-align: center;font-weight: normal;float: left;border-left: 1px solid #777;}
#nav_all li .nav_aa{display: block;height: 42px;line-height: 42px;color: #FFF;font-size: 14px;white-space: nowrap;border-left: 1px solid #222;}
/*#nav_all li .nav_aa:hover{background: url(../images/bird.gif) center 33px no-repeat;font-weight: bold;}*/
#nav_all li .nav_aa:hover{background: url(../images/bird.gif) center 33px no-repeat; font-weight:bold;}
#nav_all li ul{display: none;position: absolute;z-index: 99;width: 1006px;height: 250px;left: -6px;top: 42px;background: #FFF;border-bottom: 4px solid #c00;padding-top: 10px;box-shadow: 0 10px 10px rgba(51,51,51,0.4);}

#nav_all ul li{line-height: 24px;float: left;text-align: left;width: 220px;padding-left: 30px; border-left:1px solid #ddd;}
#nav_all ul li a{display: block;font-size: 13px;height: 24px;line-height: 24px;color: #3F4C6C;}
#nav_all ul li a:hover{color: #FF0000;text-decoration: underline;}