:root{
  --blue-50:#eff6ff; --blue-100:#dbeafe; --blue-600:#2563eb; --blue-700:#1d4ed8;
  --blue-800:#1e40af; --blue-900:#1e3a8a;
  --yellow-400:#facc15; --yellow-500:#eab308; --yellow-900:#713f12;
  --green-500:#22c55e; --purple-500:#a855f7;
  --gray-50:#f9fafb; --gray-100:#f3f4f6; --gray-200:#e5e7eb; --gray-500:#6b7280;
  --gray-600:#4b5563; --gray-700:#374151; --gray-900:#111827;
  --brand:#1d4ed8; --accent:#facc15;
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--gray-900);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:12px;
  font-weight:700;font-size:15px;cursor:pointer;transition:.2s;border:none}
.btn-white{background:#fff;color:var(--blue-700)}
.btn-yellow{background:var(--yellow-400);color:var(--yellow-900)}
.btn-blue{background:var(--blue-700);color:#fff}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 25px rgba(0,0,0,.12)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--gray-200)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--blue-800)}
.logo .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue-700),var(--blue-500));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:900}
.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:8px 14px;border-radius:9px;font-size:15px;font-weight:600;color:var(--gray-700)}
.nav a:hover{background:var(--blue-50);color:var(--blue-700)}
.nav .btn{margin-left:6px}
.menu-btn{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--blue-800)}
@media(max-width:860px){
  .nav{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    padding:10px 20px 20px;border-bottom:1px solid var(--gray-200);display:none;box-shadow:0 10px 20px rgba(0,0,0,.08)}
  .nav.open{display:flex}
  .nav a{padding:12px 8px}
  .menu-btn{display:block}
}

/* Hero */
.hero{position:relative;min-height:540px;background:
   linear-gradient(115deg, rgba(15,23,42,.80) 0%, rgba(29,78,216,.64) 55%, rgba(37,99,235,.42) 100%),
   url('../assets/img/hero-caochang.jpg');
  background-size:cover;background-position:center;overflow:hidden;display:flex;align-items:center;color:#fff}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 82% 18%, rgba(255,255,255,.12), transparent 42%)}
.hero .container{position:relative;z-index:2;padding:60px 20px}
.hero .badge{display:inline-flex;align-items:center;gap:6px;background:var(--yellow-400);color:var(--yellow-900);
  font-weight:700;font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:34px;line-height:1.25;font-weight:900;margin-bottom:14px}
.hero p.sub{font-size:18px;color:#e0ecff;max-width:580px;margin-bottom:14px}
.hero .addr{font-size:14px;color:#cfe0ff;margin-bottom:24px}
.hero .cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;gap:30px;margin:6px 0 26px}
.hero-stats .hs{display:flex;flex-direction:column}
.hero-stats b{font-size:30px;font-weight:900;color:#fff;line-height:1}
.hero-stats span{font-size:13px;color:#cfe0ff;margin-top:7px}

/* Sections */
section{padding:64px 0}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:28px;font-weight:900;color:var(--gray-900)}
.sec-head p{color:var(--gray-600);font-size:16px;margin-top:8px}
.bg-gray{background:#eef3fb}

/* Feature grid */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}
.card{border:1px solid var(--gray-200);border-radius:16px;padding:22px;background:#fff;transition:.2s}
.card:hover{box-shadow:0 10px 30px rgba(0,0,0,.08);border-color:#bfdbfe}
.icon-box{width:52px;height:52px;border-radius:13px;background:var(--blue-50);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card h3{font-size:18px;font-weight:800;margin-bottom:6px}
.card .sub{color:var(--blue-600);font-weight:600;font-size:13px;margin-bottom:6px}
.card p{color:var(--gray-600);font-size:14px}

/* Base intro split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
@media(max-width:860px){.split{grid-template-columns:1fr}}
.split img{border-radius:18px;box-shadow:0 14px 40px rgba(0,0,0,.12)}
.tag{display:inline-block;background:var(--green-500);color:#fff;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px}

/* Courses */
.course{border:2px solid var(--gray-200);border-radius:18px;padding:24px;transition:.2s;cursor:pointer}
.course.green{border-color:#bbf7d0}.course.green:hover{border-color:var(--green-500)}
.course.purple{border-color:#e9d5ff}.course.purple:hover{border-color:var(--purple-500)}
.course .lvl{display:inline-block;background:var(--green-500);color:#fff;font-size:12px;font-weight:700;padding:3px 11px;border-radius:999px;margin-bottom:10px}
.course.purple .lvl{background:var(--purple-500)}
.course h3{font-size:20px;font-weight:800;margin-bottom:8px}
.course ul{list-style:none;margin:10px 0 14px}
.course li{display:flex;gap:8px;font-size:14px;color:var(--gray-600);margin-bottom:6px}
.course li svg{flex:none;margin-top:3px}
.course .price{font-weight:900;font-size:22px;color:var(--blue-700)}
.course .price.free{color:var(--green-500)}
.course .price.tbd{color:var(--blue-700);font-size:15px;font-weight:700;background:var(--blue-50);display:inline-block;padding:5px 14px;border-radius:999px}
.course .more{margin-top:12px;padding-top:12px;border-top:1px solid var(--gray-100);font-size:14px;color:var(--gray-600)}

/* Steps */
.steps{display:flex;flex-wrap:wrap;justify-content:center;gap:18px}
.step{width:150px;text-align:center}
.step .num{width:56px;height:56px;border-radius:50%;background:var(--blue-600);color:#fff;font-weight:900;
  font-size:22px;display:flex;align-items:center;justify-content:center;margin:0 auto 10px;box-shadow:0 8px 18px rgba(37,99,235,.3)}
.step h4{font-size:15px;font-weight:700}
.step p{font-size:12px;color:var(--gray-500)}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--gray-200);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:18px 20px;font-size:16px;font-weight:700;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--gray-900)}
.faq-q .chev{transition:.2s;color:var(--gray-400);flex:none}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;color:var(--gray-600);font-size:15px}
.faq-item.open .faq-a{max-height:600px;padding:0 20px 18px}

/* Partners */
.partners{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.partners .p{background:#fff;border:1px solid var(--gray-200);border-radius:12px;padding:16px 24px;font-weight:700;color:var(--gray-700)}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--blue-900),var(--blue-700));color:#fff;text-align:center;padding:56px 20px}
.cta-band h2{font-size:26px;font-weight:900;margin-bottom:10px;color:#fff}
.cta-band p{font-size:17px;margin-bottom:24px;color:#dbeafe}
.cta-band .btn{background:var(--yellow-400);color:var(--yellow-900)}

/* Contact form */
.form-wrap{max-width:480px;margin:0 auto;background:#fff;border-radius:18px;box-shadow:0 16px 40px rgba(0,0,0,.1);padding:28px}
.form-wrap label{display:block;font-size:14px;font-weight:700;margin:14px 0 6px}
.form-wrap input,.form-wrap select,.form-wrap textarea{width:100%;padding:12px 14px;border:1px solid var(--gray-300,#d1d5db);
  border-radius:11px;font-size:15px;font-family:inherit}
.form-wrap input:focus,.form-wrap select:focus,.form-wrap textarea:focus{outline:none;border-color:var(--blue-600);box-shadow:0 0 0 3px var(--blue-100)}
.form-wrap .hint{font-size:12px;color:var(--gray-500);text-align:center;margin-top:10px}
.form-note{background:var(--blue-50);border:1px solid var(--blue-100);border-radius:12px;padding:14px 16px;font-size:14px;color:var(--blue-800);text-align:center;max-width:480px;margin:0 auto 20px}

/* Footer */
.footer{background:var(--gray-900);color:var(--gray-400);padding:48px 0 28px}
.footer .container{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media(max-width:760px){.footer .container{grid-template-columns:1fr}}
.footer h3{color:#fff;font-size:17px;margin-bottom:12px}
.footer a{color:#93c5fd}
.footer a:hover{color:#bfdbfe}
.footer .bottom{border-top:1px solid #374151;margin-top:28px;padding-top:18px;text-align:center;font-size:13px;color:#9ca3af}

/* Tiku */
.tiku-layout{max-width:760px;margin:0 auto}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.chip{padding:8px 14px;border-radius:999px;border:1px solid var(--gray-200);background:#fff;font-size:14px;cursor:pointer;color:var(--gray-600)}
.chip.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}
.q-card{background:#fff;border:1px solid var(--gray-200);border-radius:16px;padding:20px;margin-bottom:16px}
.q-card .q-title{font-weight:700;font-size:15px;margin-bottom:12px}
.q-card .q-title .qidx{color:var(--blue-600);margin-right:6px}
.opt{width:100%;text-align:left;padding:11px 14px;border:1px solid var(--gray-200);border-radius:11px;margin-bottom:8px;
  font-size:14px;cursor:pointer;transition:.15s;background:#fff;color:var(--gray-700)}
.opt:hover{border-color:#bfdbfe;background:var(--gray-50)}
.opt.correct{border-color:var(--green-500);background:#f0fdf4;color:#15803d;font-weight:600}
.opt.wrong{border-color:#fca5a5;background:#fef2f2;color:#dc2626;font-weight:600}
.opt.chosen{border-color:var(--blue-500);background:var(--blue-50)}
.q-meta{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:13px;color:var(--gray-500)}
.q-analysis{margin-top:10px;padding-top:10px;border-top:1px solid var(--gray-100);font-size:14px;color:var(--gray-600);display:none}
.q-card.revealed .q-analysis{display:block}
.q-fav{cursor:pointer;color:var(--gray-500)}
.q-fav.on{color:var(--yellow-500)}
.pager{display:flex;justify-content:center;align-items:center;gap:14px;margin-top:18px}
.pager button{padding:9px 18px;border:1px solid var(--gray-200);border-radius:10px;background:#fff;cursor:pointer;font-size:14px}
.pager button:disabled{opacity:.4;cursor:not-allowed}
.stat-bar{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;margin:10px 0 4px;font-size:14px;color:var(--gray-600)}
.stat-bar b{color:var(--blue-700)}
.tiku-tabs{display:flex;gap:4px;background:#fff;border:1px solid var(--gray-100);border-radius:12px;padding:4px;width:fit-content;margin:0 auto 8px}
.tiku-tabs button{padding:9px 18px;border-radius:9px;border:none;background:none;font-weight:600;font-size:14px;cursor:pointer;color:var(--gray-600)}
.tiku-tabs button.active{background:var(--blue-600);color:#fff}

/* 图片画廊（实训场地） */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.gallery figure{margin:0;background:#fff;border:1px solid var(--gray-200);border-radius:16px;overflow:hidden}
.gallery img{width:100%;aspect-ratio:16/10;object-fit:cover}
.gallery figcaption{padding:12px 16px;font-size:14px;color:var(--gray-600)}
@media(max-width:720px){.gallery{grid-template-columns:1fr}}
.page-title{padding:48px 0 8px;text-align:center}
.page-title h1{font-size:28px;font-weight:900}
.page-title p{color:var(--gray-500);margin-top:6px}
.breadcrumb{font-size:14px;color:var(--gray-500);margin:20px 0 0}
.breadcrumb a{color:var(--blue-600)}
.bg-blue-soft{background:#eef4ff}
.map-wrap{background:#fff;border-radius:16px;padding:16px;box-shadow:0 6px 22px rgba(30,64,175,.10)}
.map-wrap svg{width:100%;height:auto;display:block}