.mb_head{display:none;}
.pc_head{width:100%;width:100%;z-index:9999;position:sticky;top:0;left:0;background:#fff;}
.pc_head .ctt{position:relative;display:flex;align-items:center;justify-content:space-between;width:90%;}
.pc_top{width:20%;}
.pc_logo{width:250px;}
.pc_logo a{display:block;}
.pc_logo a img{width:100%;display:block;}

.pc_nav{width:75%}
.pc_nav ul{display:flex;justify-content:space-between;}
.pc_nav ul li{display:flex;align-items:center;position:relative;width:16.6%}
.pc_nav ul li:after{display: inline-block;width: 1px; height: 17px;background: #e4e4e4;content: "";position: absolute;right: 0px;}
.pc_nav ul li a{text-align:center;width:100%;font-size:20px;font-weight:500;display:block;padding:40px 0px;position:relative;}
.pc_nav ul li:last-child:after{display:none;}
.pc_nav ul li a:hover{font-weight:700;color:#2f91ab}
.pc_nav ul li a.nav_active{font-weight:700;color:#2f91ab}
.rolling_ban{background: linear-gradient(90deg, #0553cb, #003c67);display: flex;width: 100%;overflow: hidden;display:block;width:100%;overflow:hidden;padding:20px 0}
.rolling_ban p{white-space:nowrap;color:#fff;font-weight:200;font-size:40px;animation:marquee 40s linear infinite; text-align:center;}
/*@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
} */

@media screen and (max-width:1800px){
  .pc_head .ctt{width:1400px;}
  .pc_top{width:200px}
  .pc_logo{width:100%}
  .pc_nav{width:1100px}
  .pc_nav ul li a{font-size:17px;}
}

@media screen and (max-width:799px){
  .pc_head{display:none;}
  .hd_btn{display:none;} 
  .rolling_ban{padding:10px 0}
    .rolling_ban p{font-size:11px}
  .mb_head{display:block;position:fixed;top:0;left:0;z-index:99999;width:100%;background:#fff;}
  .mb_top{display:flex;align-items:center;justify-content:space-between;padding:15px 0;width:90%;margin:0 auto;}
  .mb_nav{cursor:pointer;width:25px;}
  .mb_nav img{width:100%}
  .mb_logo{width:200px;}
  .mb_logo img{width:100%}
  .mb_call{width:40px;}
  .mb_call img{width:100%}
  .all_nav{z-index:99999;top:0;right:-100%;width:70%;height:100vh;background:rgba(0,0,0,0.9);padding:60px 0;position:absolute;transition:all .5s;}
  .all_nav_open{right:0;}
  .all_nav ul{width:90%;margin:0 auto;margin-top:40px;}
  .all_nav ul li{padding:15px 0;}
  .all_nav ul li a{color:#fff;font-size:16px;text-align:center;display:block;}
  .all_nav_close{cursor:pointer;position:absolute;top:35px;right:35px;width:20px;}
  .all_nav_close img{display:block;width:100%;}
  
  .nav_user{width:80%;margin:0 auto;padding-top:30px;}
  .nav_user a{margin-top:10px;color:#fff;display:block;border:1px solid #fff;padding:15px 0;font-size:14px;text-align:Center;}
}