/* ============================================================
   京北国际航空 · 官网样式 V5
   设计语言参考 www.xyz-online.com：
   - 主色：深藏青 #0F3473 / 亮蓝 #0095FD
   - 大数字统计、卡片交互、磨砂玻璃、背景大图
   - 干净无图标，纯文字 + 图片
   ============================================================ */

:root{
  --navy:#0F3473;
  --navy2:#0d4f9e;
  --blue:#0095FD;
  --blue-soft:#e8f4ff;
  --ink:#3d4757;
  --muted:#7a8699;
  --line:#e6ecf3;
  --gray:#f4f7fb;
  --white:#fff;
  --shadow:0 10px 30px rgba(15,52,115,.08);
  --shadow-lg:0 24px 60px rgba(15,52,115,.16);
  --r-lg:20px;
  --r-md:14px;
  --wrap:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
.hide{display:none!important}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  color:var(--ink);
  background:var(--white);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.gray{background:var(--gray)}

/* ============ 顶部导航 ============ */
.main{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(15,52,115,.08);
}
.main .nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo img{height:46px;width:auto}
.logo b{display:block;font-size:21px;font-weight:800;color:var(--navy);line-height:1.2;letter-spacing:.5px;white-space:nowrap}
.logo small{display:block;font-size:13px;color:#5f6b80;letter-spacing:.5px;margin-top:3px;line-height:1.35}
.menu{display:flex;align-items:center;gap:6px}
.menu a{
  display:block;padding:9px 16px;border-radius:999px;
  font-size:15px;color:var(--ink);font-weight:600;
  transition:all .25s;
}
.menu a:hover{color:var(--navy);background:var(--blue-soft)}
.menu a.on{color:var(--white);background:var(--navy)}
.menu a.nav-cta{color:#fff;background:var(--blue);padding:10px 22px}
.menu a.nav-cta:hover{background:#0078d4}

/* 业务服务下拉菜单 */
.menu .menu-item{position:relative}
.menu .menu-item>a{display:block;padding:9px 16px;border-radius:999px;font-size:15px;color:var(--ink);font-weight:600;transition:all .25s;cursor:pointer}
.menu .menu-item>a:hover{color:var(--navy);background:var(--blue-soft)}
.menu .menu-item .dn{font-style:normal;font-size:10px;color:var(--muted);margin-left:2px}
.menu .dropdown{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(6px);
  min-width:160px;background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:0 18px 40px rgba(15,52,115,.16);padding:8px;
  opacity:0;visibility:hidden;transition:all .25s ease;z-index:120;
}
.menu .dropdown::before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}
.menu .menu-item:hover .dropdown,.menu .menu-item:focus-within .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.menu .dropdown a{display:block;padding:10px 18px;border-radius:10px;font-size:15px;color:var(--ink);font-weight:600;text-align:center;white-space:nowrap;transition:all .2s}
.menu .dropdown a:hover{background:var(--blue-soft);color:var(--navy)}

/* 移动端子菜单 */
.mm-group .mm-sub{display:none;padding:7px 6px 7px 26px;font-size:15px;color:var(--muted);border-bottom:1px solid #f2f5f9;font-weight:400}
.mm-group.open .mm-sub{display:block}
.mm-group .ar{transition:transform .3s ease}
.mm-group.open .ar{transform:rotate(90deg)}
.mm-group .mm-sub:hover{color:var(--blue)}
.mm-group>a{border-bottom:1px solid #f2f5f9}

/* 锚点滚动补偿（sticky 导航） */
.svc-card{scroll-margin-top:96px}

/* 汉堡按钮 */
.burger{display:none;width:31px;height:31px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:3.5px;z-index:110}
.burger span{display:block;width:14px;height:2px;background:var(--navy);border-radius:2px;transition:all .3s}
.burger.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* 移动端右侧抽屉 */
.mobile-mask{position:fixed;inset:0;background:rgba(15,52,115,.45);opacity:0;visibility:hidden;transition:all .3s;z-index:120}
.mobile-mask.show{opacity:1;visibility:visible}
.mobile-menu{
  position:fixed;top:0;right:-60%;width:50%;height:100%;z-index:130;overflow-y:auto;
  background:#fff;box-shadow:-12px 0 40px rgba(15,52,115,.18);
  transition:right .32s ease;display:flex;flex-direction:column;padding:22px;
}
.mobile-menu.open{right:0}
.mm-head{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:14px}
.mm-head img{height:40px}
.mm-head b{display:block;color:var(--navy);font-size:18px}
.mm-head small{color:var(--muted);font-size:11px;letter-spacing:1px}
.mobile-menu>a{display:flex;justify-content:space-between;align-items:center;padding:9px 6px;font-size:16px;font-weight:600;color:var(--ink);border-bottom:1px solid #f2f5f9}
.mm-row{display:flex;align-items:center;border-bottom:1px solid #f2f5f9}
.mm-row a{flex-shrink:0;display:block;padding:9px 6px;font-size:16px;font-weight:600;color:var(--ink)}
.mm-row .ar{flex:1;text-align:right;padding:9px 6px;font-size:20px;color:#c3ccd9;cursor:pointer;transition:transform .3s ease}
.mobile-menu>a.on{color:var(--blue)}
.mobile-menu>a.mm-cta{margin-top:12px;justify-content:center;background:var(--blue);color:#fff;border-radius:12px;border:none;padding:12px}
.mobile-menu .ar{color:#c3ccd9;font-size:20px}

/* ============ 首页首屏 Hero（三图轮播） ============ */
.hero{
  position:relative;min-height:620px;overflow:hidden;
  background:#0b2452;
}
.hero-slides,.hero-slide{position:absolute;inset:0}
.hero-slide{
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.2s ease;
}
.hero-slide.active{opacity:1}
.hero-dots{position:absolute;bottom:22px;left:0;right:0;display:flex;justify-content:center;gap:10px;z-index:5}
.hero-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.55);cursor:pointer;transition:all .3s}
.hero-dots span.on{background:#fff;width:26px;border-radius:20px}
.hero .wrap{position:relative;z-index:2;padding-top:70px;padding-bottom:90px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 18px;border-radius:999px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);
  font-size:13px;letter-spacing:2px;margin-bottom:26px;backdrop-filter:blur(6px);
}
.hero-badge i{width:8px;height:8px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px rgba(0,149,253,.3)}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.22;font-weight:800;letter-spacing:1px}
.hero h1 .hl{color:#5bc0ff}
.hero .sub{max-width:640px;margin-top:22px;font-size:16px;color:#d6e4f8;line-height:1.9}
.hero .btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 32px;border-radius:999px;font-size:15px;font-weight:700;
  transition:all .25s;cursor:pointer;border:1px solid transparent;
}
.btn.amber{background:var(--blue);color:#fff;box-shadow:0 12px 28px rgba(0,149,253,.38)}
.btn.amber:hover{background:#0078d4;box-shadow:0 12px 28px rgba(0,149,253,.38)}
.btn.ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn.ghost:hover{background:#fff;color:var(--navy)}
.btn.blue{background:var(--blue);color:#fff}
.btn.blue:hover{background:#0078d4}
.btn.outline{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn.outline:hover{background:var(--navy);color:#fff}
.hero .mini{margin-top:30px;font-size:13px;color:#9fbbe4;letter-spacing:.5px}

/* ============ 数据统计（大数字） ============ */
.stats-band{position:relative;background:var(--white);overflow:hidden}
.stats-band .deco{position:absolute;inset:0;pointer-events:none}
.stats-band .wrap{position:relative;z-index:2;display:grid;grid-template-columns:repeat(5,1fr);gap:10px;padding-top:64px;padding-bottom:64px}
.stat{text-align:center;padding:14px 8px}
.stat b{
  display:block;font-size:clamp(30px,3.6vw,54px);font-weight:800;color:var(--navy);
  line-height:1.15;font-family:"Arial Narrow",Arial,"Microsoft YaHei",sans-serif;letter-spacing:-1px;
}
.stat b em{font-style:normal;font-size:.55em;color:var(--blue);font-weight:800;margin-left:2px}
.stat span{display:block;margin-top:8px;font-size:14px;color:var(--muted);letter-spacing:1px}
.stat+.stat{border-left:1px dashed var(--line)}

/* ============ 区块标题（xyz 风格） ============ */
.section-head{margin-bottom:46px;text-align:center}
.section-head .tag{
  display:inline-block;font-size:12px;letter-spacing:4px;color:var(--blue);
  margin-bottom:10px;font-weight:700;
}
.section-head h2{
  font-size:clamp(26px,3.4vw,44px);font-weight:800;color:var(--navy);line-height:1.25;
  padding-bottom:18px;position:relative;margin-bottom:8px;
}
.section-head h2::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:56px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--blue),#5bc0ff);
}
.section-head.left{text-align:left}
.section-head.left h2::after{left:0;transform:none}
.section-head p{color:var(--muted);font-size:15px;margin-top:10px}

/* ============ 首页：业务卡片（xyz idx2 磨砂玻璃风格） ============ */
.services{
  padding:96px 0 110px;position:relative;
  background:var(--gray) url('../img/service-bg.jpg?v=59') center/cover no-repeat;
}
.services::before{
  content:"";position:absolute;top:0;left:0;right:0;height:240px;z-index:1;
  background:linear-gradient(180deg,#f4f7fb 0%,rgba(244,247,251,.88) 32%,rgba(244,247,251,0) 100%);
}
.services .wrap{position:relative;z-index:2}
.svc-row{display:flex;gap:18px;align-items:stretch;justify-content:center}
.svc-card{
  flex:0 0 270px;max-width:270px;position:relative;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid #fff;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  box-shadow:var(--shadow);
  transition:all .4s ease;cursor:pointer;
  min-height:480px;display:flex;flex-direction:column;
}
.svc-card .bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:0;visibility:hidden;transition:opacity .45s ease,visibility .45s ease;
}
.svc-card .shade{
  position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,30,66,.05) 0%,rgba(10,30,66,.72) 100%);
  opacity:0;visibility:hidden;transition:opacity .45s ease,visibility .45s ease;
}
.svc-body{position:relative;z-index:2;padding:44px 30px 30px;display:flex;flex-direction:column;flex:1;transition:color .3s}
.svc-num{font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:700;margin-bottom:auto}
.svc-card h3{font-size:24px;font-weight:800;color:var(--navy);margin:18px 0 12px;transition:color .3s}
.svc-card .svc-desc{font-size:14px;color:var(--muted);line-height:1.85;transition:color .3s}
.svc-tags{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px;transition:opacity .3s}
.svc-tags span{
  font-size:12px;padding:5px 12px;border-radius:999px;background:var(--blue-soft);color:var(--navy);
}
.svc-full{
  position:absolute;inset:0;z-index:3;padding:40px 32px;display:flex;flex-direction:column;justify-content:flex-end;
  opacity:0;visibility:hidden;transform:translateY(14px);transition:all .45s ease;
}
.svc-full h3{font-size:26px;font-weight:800;color:#fff;margin-bottom:12px}
.svc-full p{font-size:14px;color:#e8f1fd;line-height:1.9}
.svc-full .go{margin-top:18px;display:inline-flex;align-items:center;gap:6px;color:#5bc0ff;font-weight:700;font-size:14px}
.svc-card.active{flex:1 1 auto;max-width:none}
.svc-card.active .bg,.svc-card.active .shade{opacity:1;visibility:visible}
.svc-card.active .svc-body{color:#fff}
.svc-card.active .svc-num{color:#5bc0ff}
.svc-card.active .svc-desc,.svc-card.active .svc-tags{opacity:0;visibility:hidden}
.svc-card.active .svc-full{opacity:1;visibility:visible;transform:none}
.svc-card:hover .bg,.svc-card:hover .shade{opacity:1;visibility:visible}
.svc-card:hover .svc-desc,.svc-card:hover .svc-tags{opacity:0;visibility:hidden}
.svc-card:hover .svc-full{opacity:1;visibility:visible;transform:none}

/* ============ 学习中心卡片 ============ */
.study-cats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.scat{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:#fff;box-shadow:var(--shadow);
  padding:34px 28px 30px;border:1px solid var(--line);
  transition:all .3s;display:block;
}
.scat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--blue),#5bc0ff);opacity:0;transition:opacity .3s;
}
.scat:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.scat:hover::before{opacity:1}
.scat b{display:block;font-size:20px;font-weight:800;color:var(--navy);margin-bottom:8px}
.scat p{font-size:13.5px;color:var(--muted);line-height:1.8;min-height:74px}
.scat .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:700;color:var(--blue)}
.scat .go i{transition:transform .3s;font-style:normal}
.scat:hover .go i{transform:translateX(4px)}
.scat .sc-count{
  position:absolute;top:26px;right:24px;font-size:34px;font-weight:800;
  color:var(--blue-soft);font-family:"Arial Narrow",Arial,sans-serif;
}

/* ============ 关于（首页分栏） ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding:40px 24px}
.split .pic{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.split .pic img{width:100%;height:100%;object-fit:cover;min-height:340px}
.split .pic video{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;min-height:340px;display:block;background:#000}
.split .pic .pic-gif{display:none;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;min-height:340px}
.split .pic .pic-ctl{position:absolute;right:12px;bottom:12px;display:flex;gap:8px;z-index:2}
.split .pic .pic-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.92);color:#0f3473;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:2;box-shadow:0 8px 30px rgba(0,0,0,.3);transition:transform .2s,opacity .2s}
.split .pic .pic-play:hover{transform:translate(-50%,-50%) scale(1.06)}
.split .pic .pic-play svg{width:26px;height:26px;margin-left:3px}
.split .pic .pic-play.hide{display:none}
.split .pic .pic-ctl button{width:27px;height:27px;border-radius:50%;background:transparent;border:1.5px solid rgba(255,255,255,.92);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:all .2s;opacity:.9}
.split .pic .pic-ctl button:hover{background:rgba(255,255,255,.18);opacity:1}
.split .pic .pic-ctl button svg{width:13px;height:13px}
.split .pic .pic-ctl .ic-on{display:none}
/* 视频放大弹窗 */
.video-modal{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px}
.video-modal .vm-box{position:relative;width:min(94vw,1500px)}
.video-modal video{width:100%;display:block;aspect-ratio:16/9;object-fit:contain;background:#000;border-radius:12px;box-shadow:0 24px 70px rgba(0,0,0,.55)}
.video-modal .vm-close{position:absolute;top:-54px;right:0;width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.12);border:1.5px solid rgba(255,255,255,.85);color:#fff;font-size:24px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}
.video-modal .vm-close:hover{background:rgba(255,255,255,.28)}
.split .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--blue);font-weight:700}
.split .more i{font-style:normal;transition:transform .3s}
.split .more:hover i{transform:translateX(4px)}
.split p{margin-bottom:14px;color:var(--ink)}

/* ============ 新闻动态 ============ */
.news-main{display:grid;grid-template-columns:1.15fr 1fr;gap:44px;align-items:center;padding:8px 0}
.news-feature{
  position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg);
  display:block;min-height:400px;
}
.news-feature img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.news-feature .nf-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,30,66,0) 30%,rgba(10,30,66,.82) 100%)}
.news-feature .nf-txt{position:absolute;left:26px;right:26px;bottom:24px;color:#fff}
.news-feature .nf-cat{
  display:inline-block;font-size:12px;letter-spacing:2px;padding:5px 12px;border-radius:999px;
  background:var(--blue);color:#fff;margin-bottom:12px;
}
.news-feature h3{font-size:21px;font-weight:800;line-height:1.5}
.news-feature p{font-size:13.5px;color:#d7e4f6;margin-top:8px;line-height:1.8}
.news-list{display:flex;flex-direction:column}
.news-card{cursor:pointer}
.news-card .news-img{margin-bottom:14px;border-radius:14px;overflow:hidden}
.news-card .news-img img{width:100%;max-height:340px;object-fit:cover}
.news-head{display:flex;gap:8px;margin-bottom:8px}
.news-body{display:none;margin-top:16px;padding:18px 20px;background:var(--gray);border-radius:14px;font-size:15px;line-height:2.1;color:var(--ink);white-space:pre-wrap;font-family:"SimSun","Songti SC","Noto Serif SC",serif}
.news-body.open{display:block}
/* 新闻详情页 */
.news-detail{max-width:860px;margin:0 auto;padding-top:10px}
.news-detail .d-back{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-size:14px;font-weight:700;cursor:pointer;margin-bottom:22px;background:none;border:none;font-family:inherit}
.news-detail h1{font-size:clamp(22px,3vw,30px);font-weight:800;color:var(--navy);text-align:center;line-height:1.55;margin-bottom:16px}
.news-detail .d-meta{display:flex;justify-content:center;gap:12px;align-items:center;margin-bottom:26px}
.news-detail .d-cat{font-size:13px;color:var(--navy);font-weight:400;font-family:"SimSun","Songti SC",serif;background:none;padding:0;letter-spacing:1px}
.news-detail .d-date{font-size:13px;color:var(--muted);font-family:"SimSun","Songti SC",serif}
.news-detail .d-img{width:100%;max-height:420px;object-fit:cover;border-radius:16px;margin-bottom:26px;box-shadow:var(--shadow)}
.news-detail .d-content{font-family:"SimSun","Songti SC","Noto Serif SC",serif;font-size:16px;line-height:2.2;color:var(--ink);white-space:pre-wrap}
.news{
  padding:22px 6px;border-bottom:1px solid var(--line);display:block;transition:all .25s;
}
.news:first-child{padding-top:4px}
.news:hover h3{color:var(--blue)}
.news .n-cat{
  display:inline-block;font-size:13px;letter-spacing:1px;color:var(--navy);
  margin-bottom:8px;font-weight:400;font-family:"SimSun","Songti SC","Noto Serif SC",serif;
}
.news h3{font-size:16.5px;font-weight:700;color:var(--navy);line-height:1.6;transition:color .25s}
.news p{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.9;font-family:"SimSun","Songti SC","Noto Serif SC",serif}
.news .n-date{font-size:12.5px;color:#aab6c8;margin-top:8px;font-family:"SimSun","Songti SC",serif}
.news-more{text-align:center;margin-top:44px}

/* ============ 合作单位（三排无缝滚动，每排7个） ============ */
.brand-band{padding:64px 0;background:#fff}
.brand-band .section-head{margin-bottom:36px}
.brand-marquee{overflow:hidden;max-width:1240px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.brand-row{display:flex;width:max-content;animation:brandScroll 45s linear infinite}
.brand-row.reverse{animation-direction:reverse}
.brand-marquee:hover .brand-row{animation-play-state:paused}
.brand-row span{
  display:inline-flex;align-items:center;justify-content:center;
  width:138px;height:84px;padding:0;margin-right:14px;border-radius:14px;
  border:1px solid var(--line);background:#fff;overflow:hidden;
  transition:all .25s;flex-shrink:0;
}
.brand-row span:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.brand-row img{width:110px;height:48px;object-fit:contain}
@keyframes brandScroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (max-width:560px){.brand-row{animation-duration:30s}}

/* ============ 报名引导 CTA ============ */
.cta-band{
  position:relative;color:#fff;text-align:center;padding:96px 0;overflow:hidden;
  background:#0b2452 url('../img/cta-bg.jpg') center/cover no-repeat;
}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,28,64,.86),rgba(10,28,64,.82))}
.cta-band .wrap{position:relative;z-index:2}
.cta-band h2{font-size:clamp(24px,3.2vw,36px);font-weight:800;margin-bottom:14px;letter-spacing:1px}
.cta-band p{color:#c3d7f4;margin-bottom:30px;font-size:15px}
.cta-band .btn{padding:15px 46px;font-size:16px}

/* ============ 页脚 ============ */
footer{background:#0a1c40;color:#9fb0cc;padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:40px;padding-bottom:48px}
.f-logo{display:flex;align-items:center;gap:12px;color:#fff;font-size:20px;font-weight:800;margin-bottom:16px}
.f-logo img{height:42px}
footer p{font-size:13.5px;line-height:2;color:#8ba0c2}
.foot-links h5{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:1px}
.foot-brand{text-align:center}
.foot-brand .f-logo{justify-content:center}
.foot-contact{text-align:center}
.foot-links a{display:block;font-size:13.5px;color:#8ba0c2;padding:5px 0;transition:color .25s}
.foot-links a:hover{color:#5bc0ff}
.copy{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;
  font-size:12.5px;color:#5f7399;
}

/* ============ 回到顶部 ============ */
#topBtn{
  position:fixed;right:22px;bottom:26px;z-index:90;
  width:44px;height:44px;border-radius:12px;border:none;cursor:pointer;
  background:var(--navy);color:#fff;font-size:18px;box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;
}
#topBtn.show{opacity:1;visibility:visible;transform:none}
#topBtn:hover{background:var(--blue)}

/* ============ 内页通用 ============ */
.page-hero{
  position:relative;padding:74px 0 66px;color:#fff;text-align:center;overflow:hidden;
  background:linear-gradient(120deg,#0a1c40 0%,#0d4f9e 60%,#0a3a86 100%);
}
.page-hero::after{
  content:"";position:absolute;right:-80px;top:-120px;width:340px;height:340px;border-radius:50%;
  border:44px solid rgba(0,149,253,.14);
}
.page-hero::before{
  content:"";position:absolute;left:-70px;bottom:-140px;width:280px;height:280px;border-radius:50%;
  border:36px dashed rgba(0,149,253,.12);
}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:clamp(26px,3.4vw,40px);font-weight:800;letter-spacing:1px}
.page-hero p{color:#bcd2f2;margin-top:12px;font-size:15px}
.page-hero .crumb{display:inline-block;margin-top:18px;font-size:12px;letter-spacing:3px;color:#7fa9e0}
.page-hero .crumb b{color:#5bc0ff}

/* 特性块（关于/学习中心） */
.feats{display:flex;flex-wrap:wrap;justify-content:center;gap:22px;margin-top:44px}
/* 2x2 大卡片（内容较多的场景，如关于页核心优势） */
.feats2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:44px}
@media (max-width:860px){.feats2{grid-template-columns:1fr}}
.feat{
  flex:0 0 calc(25% - 17px);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--shadow);transition:all .3s;
}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.feat b{display:block;font-size:18px;color:var(--navy);margin-bottom:10px}
.feat p{font-size:13.5px;color:var(--muted);line-height:1.85}
.fi{
  width:46px;height:46px;border-radius:12px;margin-bottom:16px;
  background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;
  font-size:16px;font-weight:800;display:flex;align-items:center;justify-content:center;
  font-family:"Arial Narrow",Arial,sans-serif;letter-spacing:1px;
}

/* 流程卡片（关于） */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow);transition:all .3s;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.c-img{
  height:120px;display:flex;align-items:center;justify-content:center;
  font-size:34px;font-weight:800;color:var(--white);
  background:linear-gradient(135deg,#0d4f9e,var(--blue));
  font-family:"Arial Narrow",Arial,sans-serif;
}
.c-body{padding:24px 26px 28px;flex:1}

/* 培养流程步骤列表 */
.steps{max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.step{display:flex;gap:20px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px 26px;box-shadow:var(--shadow);transition:all .3s}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.st-no{flex-shrink:0;width:54px;height:54px;border-radius:15px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;font-size:19px;font-weight:800;display:flex;align-items:center;justify-content:center;font-family:"Arial Narrow",Arial,sans-serif;letter-spacing:1px;box-shadow:0 8px 18px rgba(15,52,115,.22)}
.st-body b{display:block;font-size:17px;color:var(--navy);margin-bottom:8px}
.st-body p{font-size:14.5px;color:var(--muted);line-height:1.95}
@media (max-width:640px){.step{gap:14px}.st-no{width:42px;height:42px;font-size:15px}.st-body b{font-size:15px}.st-body p{font-size:13.5px}}

/* 发展历程轮播 */
.timeline{position:relative;max-width:980px;margin:0 auto;overflow:hidden}
.tl-track{display:flex;transition:transform .55s ease}
.tl-slide{flex:0 0 100%;padding:0 8px}
.tl-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:36px 42px;
  box-shadow:var(--shadow);min-height:200px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
}
.tl-year{font-size:42px;font-weight:800;color:var(--blue);font-family:"Arial Narrow",Arial,sans-serif;margin-bottom:16px;letter-spacing:3px}
.tl-text{font-size:15px;color:var(--ink);line-height:2.1;text-align:justify}
.tl-dots{display:flex;justify-content:center;gap:10px;margin-top:22px}
.tl-dots span{width:10px;height:10px;border-radius:50%;background:#c9d6e8;cursor:pointer;transition:all .3s}
.tl-dots span.on{background:var(--blue);width:26px;border-radius:20px}
.c-body b{display:block;font-size:17px;color:var(--navy);margin-bottom:10px}
.c-body p{font-size:13.5px;color:var(--muted);line-height:1.85}
.c-body .go{display:inline-flex;align-items:center;gap:6px;margin-top:12px;color:var(--blue);font-weight:700;font-size:14px}

/* 特性块（关于/学习中心） */

/* 岗位列表 */
.pos-filter{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:36px}
.pos-filter button{
  padding:9px 22px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--ink);cursor:pointer;transition:all .25s;font-weight:600;
}
.pos-filter button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.pos-filter button:hover{border-color:var(--blue);color:var(--blue)}
.pos-list{display:flex;flex-direction:column;gap:16px;max-width:960px;margin:0 auto}
.pos{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow);transition:all .3s;
}
.pos-head{padding:24px 28px;cursor:pointer;display:flex;flex-direction:column;gap:10px;align-items:center;text-align:center}
.pos-head h3{font-size:19px;font-weight:800;color:var(--navy);text-align:center}
.pos-tags{display:flex;flex-wrap:wrap;gap:10px}
.pos-tags .tg{font-size:12.5px;color:var(--muted);background:var(--gray);padding:5px 12px;border-radius:999px}
.pos-body{max-height:0;overflow:hidden;transition:max-height .4s ease}
.pos.open .pos-body{max-height:1400px}
.pos-body-in{padding:4px 28px 28px;border-top:1px dashed var(--line);margin-top:4px;text-align:center}
.pos-body .blk{margin-top:18px}
.pos-body .blk h4{font-size:14px;color:var(--blue);margin-bottom:8px;letter-spacing:1px;text-align:center}
.pos-body .blk ul li{font-size:14px;color:var(--ink);padding:3px 0;text-align:center}
.pos-body .blk ul li::before{display:none}
.pos-body .pos-foot{font-size:13.5px;color:var(--muted);margin-top:16px;text-align:center}
.pos-body .btn{margin-top:18px;margin-left:auto;margin-right:auto}

/* 报名表单 */
.apply-tip{
  background:var(--blue-soft);border:1px solid #c9e6ff;border-radius:var(--r-md);
  padding:16px 22px;font-size:14px;color:var(--navy);margin-bottom:26px;line-height:1.8;
}
.form-card{
  max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:40px 44px;box-shadow:var(--shadow);
}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.f-item{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.f-item.full{grid-column:1/-1}
.f-item label{font-size:14px;font-weight:700;color:var(--navy)}
.f-item label em{color:var(--blue);font-style:normal}
.f-item input,.f-item select,.f-item textarea{
  border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14.5px;
  font-family:inherit;color:var(--ink);background:#fbfcfe;transition:all .25s;outline:none;
}
.f-item input:focus,.f-item select:focus,.f-item textarea:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,149,253,.1)}
.f-item textarea{resize:vertical;min-height:90px}
.submit{width:100%;padding:14px;border:none;border-radius:12px;background:var(--blue);color:#fff;font-size:16px;font-weight:800;cursor:pointer;transition:all .25s;letter-spacing:2px}
.submit:hover{background:#0078d4}
.form-ok{display:none;text-align:center;padding:40px 0}
.ok-ic{width:64px;height:64px;border-radius:50%;background:var(--blue-soft);color:var(--blue);font-size:30px;line-height:64px;margin:0 auto 16px;font-weight:800}
.form-ok h3{color:var(--navy);font-size:22px;margin-bottom:8px}
.form-ok p{color:var(--muted);font-size:14px}
/* 报名成功邀请码展示 */
.form-invite{margin-top:20px;padding:18px;border:2px dashed var(--blue);border-radius:14px;background:#f4faff}
.form-invite .fi-label{font-size:13px;color:var(--gray);margin-bottom:8px}
.form-invite .fi-code{font-size:26px;font-weight:800;letter-spacing:3px;color:var(--navy);font-family:Consolas,Menlo,monospace;margin-bottom:6px}
.form-invite .fi-tip{font-size:12px;color:var(--gray);line-height:1.7}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .svc-card{flex-basis:230px;max-width:230px;min-height:440px}
  .svc-card h3{font-size:20px}
  .svc-body{padding:34px 22px 24px}
  .svc-full{padding:30px 24px}
  .study-cats{grid-template-columns:repeat(2,1fr)}
  .news-main{grid-template-columns:1fr;gap:30px}
  .news-feature{min-height:320px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .menu{display:none}
  .burger{display:flex}
  .stats-band .wrap{grid-template-columns:repeat(2,1fr);gap:6px;padding-top:48px;padding-bottom:48px}
  .stat:nth-child(3){border-left:none}
  .stat+.stat{border-left:none}
  .stat{border-bottom:1px dashed var(--line);padding:18px 4px}
  .stat:nth-child(n+4){border-bottom:none}
  .svc-row{flex-direction:column}
  .svc-card,.svc-card.active{flex:none;max-width:none;min-height:auto}
  .svc-card .bg,.svc-card .shade{opacity:1;visibility:visible}
  .svc-card .svc-full{opacity:1;visibility:visible;transform:none}
  .svc-card .svc-desc,.svc-card .svc-tags{opacity:0;visibility:hidden}
  .svc-card{min-height:300px}
  .svc-card .svc-body{justify-content:flex-end}
  .services{padding:60px 0 70px}
  .split{grid-template-columns:1fr;gap:30px;padding:20px 24px}
  /* 手机端视频：完整 16:9 显示，不强制高度不裁切 */
  .split .pic video,.split .pic img,.split .pic .pic-gif{min-height:0}
  .split .pic video{aspect-ratio:16/9}
  .f-row{grid-template-columns:1fr}
  .form-card{padding:28px 22px}
  .cards3{grid-template-columns:1fr}
  /* 功能卡：横向（编号徽章左 + 文字右） */
  .feats{gap:12px}
  .feat{flex:0 0 100%;display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;padding:16px}
  .feat .fi{flex-shrink:0;margin-bottom:0;width:40px;height:40px;border-radius:10px;font-size:14px}
  .feat b{flex:1;font-size:16px;margin-bottom:0;min-width:0}
  .feat p{flex:0 0 100%;font-size:13px;line-height:1.8;margin-top:2px}
  /* 核心优势卡（feats2）：横向 */
  .feats2{gap:12px}
  .feats2 .feat{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;padding:16px}
  .feats2 .feat .fi{flex-shrink:0;margin-bottom:0;width:40px;height:40px;border-radius:10px;font-size:14px}
  .feats2 .feat b{flex:1;font-size:16px;margin-bottom:0;min-width:0}
  .feats2 .feat p{flex:0 0 100%;font-size:13px;line-height:1.8;margin-top:2px}
  /* 学习中心卡：编号+标题横排，内容换行在下面 */
  .study-cats{grid-template-columns:1fr}
  .scat{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;padding:16px 18px}
  .scat .sc-count{position:static;font-size:30px;width:44px;flex-shrink:0;text-align:center}
  .scat b{flex:1;font-size:17px;margin-bottom:0;min-width:0}
  .scat p{flex:0 0 100%;min-height:0;font-size:13px;margin-top:2px}
  .scat .go{margin-top:6px;font-size:13px}
  .hero{min-height:0;aspect-ratio:16/9}
  .hero .wrap{padding-top:56px;padding-bottom:64px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  /* 手机端页脚居中 */
  footer{text-align:center}
  footer .f-logo{justify-content:center}
  footer .f-logo img{height:40px}
  footer p{font-size:13px}
}
@media (max-width:480px){
  .btn{padding:12px 24px}
}

/* 业务服务箭头：展开朝下、收起复原（无旋转动画） */
.mm-row .ar{font-size:0;transition:none}
.mm-row .ar::after{content:'\203A';font-size:20px;display:inline-block}
.mm-group.open .mm-row .ar{transform:none}
.mm-group.open .mm-row .ar::after{content:'\2304'}

/* ============ 手机端清爽页脚（参考欣亚中风格） ============ */
@media (max-width:768px){
  footer{padding:44px 0 0}
  .foot-grid{display:flex;flex-direction:column;gap:24px;padding-bottom:26px}
  .foot-brand{text-align:center}
  .foot-brand .f-logo{justify-content:center;font-size:18px}
  .foot-brand .f-logo img{height:36px}
  .foot-brand p{display:none}
  .foot-links{display:flex;flex-wrap:wrap;justify-content:center}
  .foot-links h5{flex:0 0 100%;font-size:13px;color:#8ba0c2;margin-bottom:8px;letter-spacing:2px}
  .foot-links a{width:33.33%;padding:6px 0;font-size:13px;color:#9fb0cc;text-align:center}
  /* 隐藏学习中心链接列（信息与官网导航重复，保持清爽） */
  .foot-grid > div:nth-child(3){display:none}
  .foot-contact{text-align:center}
  .foot-contact p{font-size:13px}
  .foot-contact p:first-of-type{font-size:16px;font-weight:700;color:#fff}
  .copy{font-size:11.5px;padding-bottom:18px;color:#7f92ad}
}

/* ============ 交互增强（2026-08-19） ============ */
/* A. 滚动显现 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}
/* B. 数字滚动 */
.num{font-variant-numeric:tabular-nums}
/* C. 轮播进度条 */
.hero-progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(255,255,255,.18);z-index:5}
.hero-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,#5bc0ff,var(--blue))}
.hero-progress.paused i{transition:none!important}
/* 汉堡菜单交互柔化 */
.mobile-menu a,.mm-row a,.mm-row .ar{-webkit-tap-highlight-color:transparent;transition:background-color .22s ease,color .22s ease}
.mobile-menu>a:active,.mm-row a:active,.mm-row .ar:active{background:rgba(0,149,253,.08)}
.mobile-menu>a:hover,.mm-row a:hover,.mm-row .ar:hover{background:rgba(0,149,253,.05)}
.mobile-menu>a.on{color:var(--blue);background:rgba(0,149,253,.06)}

/* ============ 大胆交互（首页/关于我们） ============ */
/* 轮播 Ken Burns：当前图缓慢放大 */
.hero-slide.active{animation:kenburns 6.5s ease-out forwards}
@keyframes kenburns{from{transform:scale(1)}to{transform:scale(1.08)}}
.hero-slide{backface-visibility:hidden}
/* 标题逐字入场 */
.w-anim{display:inline-block;opacity:0;transform:translateY(18px);animation:wUp .6s cubic-bezier(.22,.9,.35,1) forwards;white-space:pre}
@keyframes wUp{to{opacity:1;transform:none}}
/* 卡片 3D 倾斜（仅桌面指针设备） */
@media (pointer:fine){
  .tilt{transform-style:preserve-3d;will-change:transform}
}
/* 培养流程步骤强化 */
.step{transition:transform .3s ease,box-shadow .3s ease}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.st-no{transition:transform .3s ease}
.step:hover .st-no{transform:scale(1.12)}