.nav{ width:1230px; height:55px; margin:0; z-index:3; background:rgba(153,0,0,1.0);position:absolute;top:150px;left:50%;margin:0 0 0 -615px;}
.nav .nav_list{width:1230px; margin:auto;height:55px;display:flex;}
.nav li{float:left; width:100%;position: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:#C00; text-decoration:none;}
.nav li a span{float:left;display:block; width:100%; height:55px; line-height:55px;cursor:pointer; font-family:"Microsoft YaHei";text-align:center; color:#fff; font-size:18px;}
.nav li a.selected{ background: #C00; color:#fff;}
.nav li a.selected2{ background:#C00; 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:55px;left:0px; background:rgba(0,0,0,0.6);}
.nav li .submenu{width:100%;}
.nav li .submenu{ z-index:999;}
.nav li .submenu li{float:left;padding:0;background:none; font-size:16px;}
.nav li .submenu li a{float:none;padding:13px 8px;box-sizing: border-box;text-align: center; font-family:"Microsoft YaHei";background:none; color:#fff; line-height:1.3;}
.nav li .submenu li a:hover{background:#C00;font-weight:normal; color:#fff; text-decoration:none;}