.head{position:fixed;width:100%;background:#fff;z-index:9999;}
.head.active{background:#fff;}
.sub_page .head{background:#fff}
.head:before{content:"";position:absolute;width:100%;top:-100%;background:#003668;height:100%;z-index:-1}

.hd_bottom_back:before{top:0;}
.hd_bottom_back .logo img{filter:invert(1) brightness(10)}
.hd_bottom_back  .nav ul li a{color:#fff;}
.hd_bottom_back .all_nav a strong{background:#fff;}

.hd_top_ban{display:flex;position:relative;z-index:999}
.hd_top_box{width:50%;}
.hd_top_box:nth-child(1){background:#001d47}
.hd_top_box:nth-child(2){background:#1d5f9a}
.hd_top_box p{line-height:0;font-family: 'GMarketSans';font-weight:500;text-align:center;padding:10px 0;}
.hd_top_box p img{position:relative;top:-1px;margin:0 6px;height:16px;}
.hd_top{}
.hd_top .ctt{width:90%;display:flex;justify-content:space-between;align-items:center;}
.logo{width:260px;}
.logo a{display:block;}
.logo img{width:100%}

.logo_box{display:flex;align-items:center;}
.nav{margin:0 auto;}
.nav > ul{display:flex;width:100%;justify-content:center}
.nav > ul > li{position:Relative;z-index:99;}
.nav > ul > li > a{display:block;text-align:center;font-size:17px;font-weight:500;padding:30px 45px;}

.nav > ul > li:before{content:"";position:absolute;z-index:-1;width:100%;height: 427px;
background: rgba(0, 0, 0, .2);top:-427px;transition:all .2s;}
.nav > ul > li:hover:before{top:0;}
.sub_nav{display:none;position:absolute;width:100%;top:100px;left:0;z-index:100;height:330px}
.sub_nav.active{display:block;}
.sub_nav > li {}
.sub_nav > li > a{text-align:center;margin-top:11px;font-weight:600;font-size:16px;display:block;}
.nav_2dep{margin-top:7px;}


.hd_bottom{display:none;border-top:1px solid rgba(255,255,255,.2);position:relative;overflow:hidden;z-index:0;}

.hd_about_sym{position: absolute;width: 25%;right: -5%;bottom: -30%;opacity: .2;z-index: -1;opacity:0;transition:all .5s;}
.hd_bottom .ctt{width:90%;display:flex;align-items:flex-start;}
.hd_bottom .ctt>div{border-right:1px solid rgba(255,255,255,.2);padding:50px 30px;}
.hd_bottom .ctt>div:last-child{border-right:0;}

.hd_about{width:320px;flex-shrink:0;border-top:1px solid rgba(255,255,255,.2);}
.hd_about_img{width:160px;border-radius:100px;display:block;}
.hd_about_txt h4{line-height:1.3;font-weight:300;}
.hd_about_txt h4 b{font-weight:700;}
.hd_about_txt p{line-height:1.7;}
.hd_about_link{display:flex;justify-content:space-between;}
.hd_about_link a{display:block;width:48%;padding:12px 0;text-align:center;border-radius:100px;background:#fff;color:#003668;font-weight:700;}



.all_nav{margin-left:20px;}
.all_nav a{}
.all_nav a strong{display:block;width:25px;height:2px;background:#000;margin-bottom:7px;}
.all_nav a strong:last-child{margin-bottom:0;}

.all_nav_wrap{display:none;background:#003668;width:100%;height:100%;position:fixed;z-index:999999;top:0;left:0;padding:100px 0;}
.all_nav_wrap img{cursor:pointer;position:absolute;top:50px;right:50px;width:20px;transform:rotate(45deg);}
.all_nav_wrap .ctt{padding-right:100px;overflow-y:auto;height: calc(100vh - 200px);scrollbar-color: rgba(255,255,255,0.4) transparent;}

.all_nav_wrap .ctt::-webkit-scrollbar {width: 3px;}
.all_nav_wrap .ctt::-webkit-scrollbar-track {background:rgba(255,255,255,0.4)}
.all_nav_wrap .ctt::-webkit-scrollbar-thumb {background: rgba(255,255,255,0.4);border-radius: 10px;transition: background 0.3s;}
.all_nav_wrap .ctt::-webkit-scrollbar-thumb:hover {background: rgba(255,255,255,0.7);}

.all_nav_list{border-bottom:1px solid rgba(255,255,255,0.3);padding:40px 5px;}
.all_nav_list:last-child{border:0;}
.all_nav_list h2{color:#fff;margin-bottom:25px;}
.all_nav_list > ul{display:flex;}
.all_nav_block{flex-wrap:wrap}
.all_nav_block > li{width:100%;display:flex;align-items:center;padding-bottom:5px;}
.all_nav_block > li > a{width:200px;}
.all_nav_list > ul > li{}
.all_nav_list > ul > li > a{display:block;color:#fff;font-size:18px;font-weight:bold;margin-right:40px;}
.all_nav_list > ul > li > a:hover{color:#77f9ff;}
.navInLink{color:#77f9ff !important}
.all_nav_2dep{display:flex;gap: 0 30px;}
.all_nav_2dep li{}
.all_nav_2dep li a{color:#fff;font-size:16px;opacity:0.8;padding:7px 0;font-weight:600;display:block;padding-bottom:5px;}
.all_nav_2dep li a:hover{opacity:1;}


@media screen and (max-width:1700px){
  .logo{width:220px}
  .nav > ul > li > a{padding:30px 20px}
}



@media screen and (max-width:1600px){
  .hd_bottom .ctt{width:100%;}
  .hd_bottom .ctt > div{padding:40px 30px;}
  .hd_about h4{font-size:16px;}
  .hd_nav ul li a{font-size:15px;}
  .hd_num{font-size:22px;}
  .nav > ul > li:before{height:392px;top:-392px}
}
@media screen and (max-width:1400px){
  .hd_top .ctt{width:1400px}
  .hd_bottom .ctt{width:1400px}
  
}

@media screen and (max-width:768px){
  .hd_top_ban{flex-wrap:wrap}
  .hd_top_box{width:100%}
  .hd_top_box p img{height:13px;top:0;}
  .hd_top_box p{padding:5px 0;font-size: 13px;}
  .hd_top .ctt{width:90%;padding:15px 0}
  .nav{display:none;}
  .logo{width:200px;}
  .all_nav a strong{margin-bottom:5px;width:20px}
  .all_nav a strong:nth-child(1){width:20px;}
  .all_nav a strong:nth-child(2){width:14px;}
  
  .all_nav_wrap{padding:50px 0;}
  .all_nav_wrap .ctt{padding-right:30px;height: calc(100vh - 100px);}
  .all_nav_wrap img{width:20px;}
  .all_nav_list{padding:20px 30px}
  .all_nav_list > ul{flex-wrap:wrap}
  .all_nav_list > ul > li{width:100%;}
  .all_nav_list h2{font-size:18px}
  .all_nav_list > ul > li > a{font-size:15px;padding-bottom:8px;margin-right:0;}
  .all_nav_block > li{flex-wrap:wrap;margin-top:25px;}
  .all_nav_block > li:first-child{margin-top:0;}
  .all_nav_block > li > a{width:100%;}
  .all_nav_2dep{flex-wrap:wrap;gap:0;width:100%;}
  .all_nav_2dep li{width:50%;}
  .all_nav_2dep li a{font-size:13px;}
}