.nav{width:100%;position:absolute;top:140px;z-index:5;background:rgba(0,0,0,0.0);border-bottom:1px solid rgba(255,255,255,0.5);box-sizing: border-box;}
.nav .nav_list{width:1230px; margin:auto;height:45px;display:flex;}
.nav li{float:left; width:100%;position:relative;background:rgba(0,0,0,0.0); margin:0;flex:1;}/*===102,0,102,0.8=*/
.nav li a{float:left;display:block; width:100%;text-align:center; line-height:1.2;color:#fff;}
.nav li a:hover{text-decoration:none;color:#808080;}
.nav li a span{float:left;display:block; width:100%; height:45px; line-height:45px;cursor:pointer; font-family:"Microsoft YaHei";text-align:center;font-size:18px;text-shadow:2px 2px 2px rgba(0,0,0,1.0);}
.nav li a.selected{color:#fff;font-weight:bold;}
.nav li a.selected2{ background:3789be;color:#fff;}/*===一级当前栏目样式=*/
/*========以下二级导航样式=*/
.nav li.selected .submenu{display:block;}
.nav li .submenu{display:none;position:absolute;top:45px;left:0px;background:rgba(255,255,255,0.8); box-sizing: border-box; border-right:1px solid #ddd;border-bottom:1px solid #ddd;border-left:1px solid #ddd;overflow:hidden;}
.nav li .submenu{width:100%;}
.nav li .submenu{ z-index:999;}
.nav li .submenu li{float:left;padding:0;background:none;font-size:14px;border-bottom:1px solid #ddd;}
.nav li .submenu li a{float:none;padding:12px 5px;box-sizing: border-box;text-align: center; font-family:"Microsoft YaHei";background:none; color:#333; }
.nav li .submenu li a:hover{font-weight:normal; color:#3789be; text-decoration:none;background:rgba(255,255,255,1.0);}