/*pc head */
.head{position:fixed;z-index:9999;top:0;left:0;width:100%;transition:all .5s;background:#fff;}
.mb_head{display:none;}
.login{width:100%;background:#f3991f}
.login ul{display:flex;justify-content:right;gap: 0 20px;width:1600px;margin:0 auto;}
.login ul li{}
.login ul li a{opacity:1;display:block;padding:20px 0;font-size:14px;font-weight:500;color:#fff}
.head .ctt{width:1600px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;position:relative;}
.logo{width:250px;}
.logo a{display:block;width:100%;}
.logo a img{width:100%;}
.nav{width:calc(100% - 500px);}
.nav ul{display:flex;justify-content:space-between;}
.nav ul li{position:relative;}
.nav ul li a{text-align:center;display:block;font-size:18px;padding:40px 0;font-weight:500;transition:all .5s;}
.nav ul li:hover a{color:#171c61 !important;font-weight:600}
.nav ul li a.nav_active{color:#171c61 !important;font-weight:bold;}


@media screen and (max-width:1600px){
  .login ul{width:90%}
  .head .ctt{width:90%}
  .logo{width:200px}
  .nav {width: calc(100% - 300px);}
  .nav ul li a{font-size:16px;}
}

@media screen and (max-width:1200px){
  .head{display:none}
  .logo{width:auto;position:relative;top:0;left:0;transform:translate(0,0);}
  .logo a{filter:none;width:200px;}
  .logo a img{filter:none;}
  .mb_head{box-shadow:0 5px 10px rgba(0,0,0,0.1);display:block;position:fixed;top:0;left:0;z-index:99999;background:#fff;width:100%;}
  .mb_hd_top{padding:20px 0;width:90%;margin:0 auto;display:flex;align-items:center;justify-content:space-between;}
  .nav_btn{cursor:pointer;}
  .nav_btn span{width:24px;height:2px;background:#000;margin-bottom:6px;display:block;}
  .nav_btn span:nth-child(2){width:17px;}
  .nav_btn span:last-child{width:22px;margin-bottom:0;} .all_nav_list{position:fixed;top:0;right:-80%;width:80%;height:100vh;z-index:999;padding:40px;transition:all .5s;        background: rgb(21 59 107 / 80%);backdrop-filter: blur(10px);}
  .all_nav_list_show{right:0;}
  .all_nav_top{display:flex;justify-content:space-between;align-items:center;margin-bottom:35px;}
  .all_nav_logo{width:130px;filter:invert(1)  brightness(10) grayscale(1);opacity:0.4;} .all_nav_close{display:block;cursor:pointer;margin-left:auto;width:15px;}
  .all_nav_list ul{width:100%;}
  .all_nav_list ul li{}
  .all_nav_list ul li a{font-size:16px;color:#fff;padding:15px 10px;border-bottom:1px solid rgba(255,255,255,0.2);font-weight:400;display:block;}
  .all_nav_list ul li:last-child a{border:0;}
.all_nav_bg{background:rgba(0,0,0,0.5);position:fixed;top:0;left:0;width:100%;height:100vh;z-index:999;display:none;}
  .all_nav_list_show{}
  .all_nav_bg_show{}
  .login ul{width:90%}
  .login ul li a {padding: 8px 0;font-size: 12px;}
  .mb_call{display:flex;align-items:center;gap:0 10px;position:absolute;bottom:50px;left:30px;}
  .mb_call img{width:22px}
  .mb_call a{font-size:20px;color:#fff;font-weight:bold;letter-spacing:0;}
}

@media screen and (max-width:499px){
  .all_nav_list{padding:30px;}
  .all_nav_list ul li a{padding:10px}
}