.nav{width:1230px;height:80px; background:rgba(255,255,255,0.0);}
.nav .logo a{width:276px;height:53px; margin:15px 0 0 0;background: url(../images/logo.png) no-repeat; float:left;}
.nav .nav_list{ width:900px;margin:auto;height:80px;display:flex;float: right;}
.nav li{float:left; width:100%;position:relative;relative;flex:1;}
.nav li.last{background:none;}
.nav li a{float:left;display:block; width:100%;text-align:center; line-height:1.2; }
.nav li a:hover{background:rgba(0,102,204,0.7);color: #06C; text-decoration:none;}
.nav li a span{float:left;display:block; width:100%; height:80px; line-height:80px;cursor:pointer; font-family:"Microsoft YaHei";text-align:center; color:#fff; font-size:18px;}
.nav li a.selected{ background:rgba(0,102,204,0.5); color: #06C;}
.nav li a.selected2{ background:rgba(0,102,204,0.7); color: #06C;}/*===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:80px;left:0px; background:rgba(255,255,255,1.0);}
.nav li .submenu{width:100%;}
.nav li .submenu{ z-index:999;}
.nav li .submenu li{float:left;padding:0;background:none;}
.nav li .submenu li a{float:none;padding:15px 5px;box-sizing: border-box;text-align: center; font-family:"Microsoft YaHei";background:none; color: #666; }
.nav li .submenu li a:hover{background:rgba(0,102,204,0.7);font-weight:normal; color:#fff; text-decoration:none;}