/* ===== 中飞领航官网 · 航空科技蓝主题 ===== */
:root{
  --navy:#0A2540;
  --navy-2:#0B3D91;
  --blue:#2E8BFF;
  --blue-light:#5BA8FF;
  --cyan:#38E1FF;
  --gray:#6B7A90;
  --bg:#F4F8FD;
  --white:#fff;
  --ink:#0E1B2C;
  --ink-soft:#46566B;
  --line:#E3ECF6;
  --shadow:0 18px 50px rgba(10,37,64,.12);
  --shadow-sm:0 8px 24px rgba(10,37,64,.08);
  --radius:18px;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{position:relative}

/* 顶部电话条 */
.topbar{background:linear-gradient(90deg,var(--navy),var(--navy-2));color:#cfe2ff;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cfe2ff}
.topbar .tb-phone{color:#fff;font-weight:700;letter-spacing:.5px}
.topbar .tb-phone:hover{color:var(--cyan)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;color:var(--navy)}
.brand .logo{width:38px;height:38px;flex:none}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--gray);letter-spacing:1px}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:15px;color:var(--ink-soft);font-weight:600;position:relative;padding:6px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--blue);transition:width .25s}
.nav-links a:hover{color:var(--blue)}
.nav-links a:hover::after{width:100%}
.nav-cta{display:inline-flex;align-items:center;gap:7px;background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff;padding:10px 20px;border-radius:30px;font-weight:700;font-size:14px;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:3px;background:var(--navy);border-radius:3px;transition:.3s}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:30px;font-weight:700;font-size:16px;cursor:pointer;border:0;transition:transform .2s,box-shadow .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff;box-shadow:0 12px 30px rgba(46,139,255,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(46,139,255,.5)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.22);transform:translateY(-3px)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{transform:translateY(-3px);box-shadow:var(--shadow)}

/* Hero */
.hero{background:radial-gradient(1200px 600px at 75% -10%,rgba(46,139,255,.35),transparent 60%),radial-gradient(900px 500px at 10% 110%,rgba(56,225,255,.18),transparent 55%),linear-gradient(160deg,#06182E 0%,#0A2540 45%,#0B3D91 100%);color:#fff;overflow:hidden;padding:84px 0 96px}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(180deg,transparent,#000 30%,#000 70%,transparent);opacity:.6}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero .tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);padding:7px 16px;border-radius:30px;font-size:13px;color:#bfe0ff;margin-bottom:22px}
.hero .tag b{color:var(--cyan)}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 .hl{background:linear-gradient(120deg,var(--cyan),var(--blue-light));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:#c7d8ee;max-width:520px;margin-bottom:32px}
.hero .actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-art{position:relative;min-height:320px}
.hero-art svg{width:100%;height:auto;filter:drop-shadow(0 20px 50px rgba(46,139,255,.45))}
/* Hero 信息卡片：公司简介 / 锦旗 / 创始人 */
.hero-cards{display:flex;flex-direction:column;gap:14px;max-width:460px;margin-left:auto}
.hcard{display:flex;gap:14px;align-items:flex-start;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:16px 18px;backdrop-filter:blur(10px);box-shadow:0 14px 40px rgba(4,20,45,.45);transition:transform .25s,border-color .25s}
.hcard:hover{transform:translateY(-3px);border-color:rgba(94,168,255,.55)}
.hcard .hicon{flex:0 0 42px;height:42px;display:flex;align-items:center;justify-content:center;font-size:21px;background:linear-gradient(135deg,#2E8BFF,#38E1FF);border-radius:12px;box-shadow:0 6px 18px rgba(46,139,255,.5)}
.hcard .havatar{flex:0 0 58px;width:58px;height:74px;object-fit:cover;object-position:top;border-radius:12px;border:2px solid rgba(94,168,255,.7);box-shadow:0 6px 18px rgba(4,20,45,.5)}
.hcard .hbody h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:5px;letter-spacing:.5px}
.hcard .hbody p{color:#b9d2f2;font-size:13px;line-height:1.65;margin:0}
.hcard .hbody p b{color:#fff}
.hcard .htimeline{display:block;margin-top:8px;color:#7fd4ff;font-size:12px;letter-spacing:.3px}
.hcard:nth-child(2){transform:translateX(-14px)}
.hcard:nth-child(2):hover{transform:translateX(-14px) translateY(-3px)}
.hero-mini{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-mini .m{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:12px 18px;backdrop-filter:blur(6px)}
.hero-mini .m b{display:block;font-size:22px;color:#fff}
.hero-mini .m span{font-size:12px;color:#9fc0e6}

/* 通用区块 */
.section{padding:84px 0}
.section.alt{background:#fff}
.section-head{text-align:center;max-width:720px;margin:0 auto 52px}
.section-head .eyebrow{display:inline-block;color:var(--blue);font-weight:700;letter-spacing:2px;font-size:13px;margin-bottom:12px;text-transform:uppercase}
.section-head h2{font-size:34px;font-weight:800;color:var(--navy);letter-spacing:-.5px;margin-bottom:14px}
.section-head p{color:var(--ink-soft);font-size:16px}

/* 卖点卡片 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cfe0f7}
.card .ic{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),var(--navy-2));margin-bottom:18px}
.card .ic svg{width:28px;height:28px}
.card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--ink-soft);font-size:14.5px}

/* 课程 */
.course{display:flex;flex-direction:column;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s}
.course:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.course .top{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:26px 28px}
.course .top .lv{font-size:12px;letter-spacing:2px;color:var(--cyan);font-weight:700}
.course .top h3{font-size:22px;margin:6px 0 4px}
.course .top p{font-size:13px;color:#bcd4f0}
.course .body{padding:24px 28px 28px;flex:1;display:flex;flex-direction:column}
.course ul{margin:0 0 18px}
.course li{display:flex;gap:10px;padding:7px 0;font-size:14.5px;color:var(--ink-soft);border-bottom:1px dashed var(--line)}
.course li:last-child{border-bottom:0}
.course li svg{flex:none;width:18px;height:18px;margin-top:3px;color:var(--blue)}
.course .meta{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.course .meta .price{font-size:20px;font-weight:800;color:var(--navy)}
.course .meta .price small{font-size:12px;color:var(--gray);font-weight:500}

/* 优势/数据条 */
.stats{background:linear-gradient(135deg,var(--navy),var(--navy-2));border-radius:24px;padding:42px 30px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;color:#fff;box-shadow:var(--shadow)}
.stats .s{text-align:center}
.stats .s b{display:block;font-size:40px;font-weight:800;background:linear-gradient(120deg,var(--cyan),var(--blue-light));-webkit-background-clip:text;background-clip:text;color:transparent}
.stats .s span{font-size:14px;color:#bcd4f0}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;position:relative;box-shadow:var(--shadow-sm)}
.step .n{counter-increment:s;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:16px}
.step .n::before{content:counter(s)}
.step h4{color:var(--navy);font-size:17px;margin-bottom:8px}
.step p{color:var(--ink-soft);font-size:14px}

/* 学员 */
.student{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s}
.student:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.student .quote{font-size:15px;color:var(--ink);line-height:1.8;position:relative;padding-left:18px}
.student .quote::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:4px;background:linear-gradient(var(--blue),var(--cyan))}
.student .who{display:flex;align-items:center;gap:12px;margin-top:18px}
.student .ava{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.student .who b{color:var(--navy);font-size:15px}
.student .who span{display:block;font-size:12.5px;color:var(--gray)}

/* 报名表单 */
.signup-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:36px;box-shadow:var(--shadow)}
.form-card h3{font-size:22px;color:var(--navy);margin-bottom:6px}
.form-card .sub{color:var(--ink-soft);font-size:14px;margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;font-family:inherit;color:var(--ink);background:#FBFDFF;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 4px rgba(46,139,255,.12)}
.field textarea{resize:vertical;min-height:88px}
.form-note{font-size:12.5px;color:var(--gray);margin-top:4px}
.form-ok{display:none;background:#E8FBF0;border:1px solid #B6ECCB;color:#1c7a45;border-radius:12px;padding:14px 16px;font-size:14.5px;margin-bottom:16px}
.form-ok.show{display:block}
.qr{background:linear-gradient(160deg,#06182E,#0B3D91);border-radius:24px;padding:34px;color:#fff;text-align:center;box-shadow:var(--shadow)}
.qr h3{font-size:20px;margin-bottom:8px}
.qr p{font-size:13.5px;color:#bcd4f0;margin-bottom:20px}
.qr .box{width:180px;height:180px;margin:0 auto 16px;background:#fff;border-radius:16px;display:flex;align-items:center;justify-content:center}
.qr .box svg{width:150px;height:150px}
.qr .phone{font-size:22px;font-weight:800;color:#fff;letter-spacing:1px}
.qr .phone small{display:block;font-size:12px;color:#9fc0e6;font-weight:500;letter-spacing:0}

/* CTA 横幅 */
.cta-band{background:radial-gradient(800px 400px at 80% 0,rgba(56,225,255,.25),transparent 60%),linear-gradient(135deg,var(--navy),var(--navy-2));border-radius:26px;padding:56px 44px;text-align:center;color:#fff;box-shadow:var(--shadow)}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:14px}
.cta-band p{color:#c7d8ee;font-size:16px;margin-bottom:28px;max-width:560px;margin-left:auto;margin-right:auto}

/* 页脚 */
.footer{background:var(--navy);color:#9fb6d4;padding:56px 0 26px;margin-top:0}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:36px}
.footer .brand{color:#fff;margin-bottom:14px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer a{display:block;color:#9fb6d4;font-size:14px;padding:5px 0;transition:color .2s}
.footer a:hover{color:var(--cyan)}
.footer .desc{font-size:13.5px;line-height:1.8;max-width:300px}
.footer .bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#7d97ba}
.footer .bottom a{display:inline;color:#7d97ba}

/* 悬浮电话 */
.fab{position:fixed;right:22px;bottom:22px;z-index:60;display:flex;align-items:center;gap:10px;background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff;padding:14px 20px;border-radius:40px;font-weight:700;box-shadow:0 14px 34px rgba(46,139,255,.5);transition:transform .2s}
.fab:hover{transform:scale(1.05)}
.fab svg{width:22px;height:22px}
.fab .fab-txt small{display:block;font-size:10px;font-weight:500;color:#cfe2ff}
@media(max-width:520px){.fab .fab-txt{display:none}}

/* 滚动揭示动画 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media(max-width:980px){
  .hero .wrap{grid-template-columns:1fr}
  .hero-art{order:-1;min-height:auto}
  .hero-cards{margin:0 auto}
  .hcard:nth-child(2){transform:none}
  .hcard:nth-child(2):hover{transform:translateY(-3px)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .signup-grid{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-links{position:fixed;top:106px;right:18px;left:18px;background:#fff;flex-direction:column;gap:0;padding:14px;border-radius:16px;box-shadow:var(--shadow);transform:scaleY(0);transform-origin:top;opacity:0;transition:.25s;z-index:40}
  .nav-links.open{transform:scaleY(1);opacity:1}
  .nav-links a{padding:13px 6px;border-bottom:1px solid var(--line);width:100%}
  .nav-toggle{display:flex}
  .hero h1{font-size:33px}
  .section-head h2{font-size:26px}
  .grid-3,.grid-4,.grid-2,.steps{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr}
  .topbar .wrap{font-size:12px}
  .cta-band{padding:40px 22px}
}