:root{
  --flame:#FF6B35;
  --flame-light:#FF8A3D;
  --amber:#FFC53D;
  --indigo:#4F46E5;
  --indigo-light:#6366F1;
  --ink:#1E293B;
  --muted:#64748B;
  --bg:#FFFBF7;
  --bg-soft:#FFF4EC;
  --card:#FFFFFF;
  --border:#F0E6DD;
  --shadow:0 10px 30px rgba(255,107,53,.10);
  --shadow-soft:0 4px 16px rgba(30,41,59,.06);
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;}

/* ===== Nav ===== */
.nav{background:rgba(255,251,247,.85);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;}
.nav-inner{max-width:1120px;margin:0 auto;padding:12px 22px;display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand img{width:40px;height:40px;display:block;}
.brand-name{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:.5px;}
.brand-name b{color:var(--flame);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{margin-left:6px;padding:8px 14px;text-decoration:none;color:var(--muted);font-size:15px;border-radius:999px;transition:all .18s;}
.nav-links a:hover{color:var(--flame);background:var(--bg-soft);}
.nav-cta{margin-left:10px;background:var(--flame);color:#fff;padding:9px 20px;border-radius:999px;font-weight:700;font-size:14px;text-decoration:none;transition:transform .15s,box-shadow .15s;}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,107,53,.35);}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(125deg,#FF7A3D 0%,#FF5A2D 42%,#4F46E5 100%);color:#fff;padding:96px 22px 104px;text-align:center;}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 18% 22%,rgba(255,255,255,.18),transparent 42%),radial-gradient(circle at 82% 78%,rgba(99,102,241,.35),transparent 46%);pointer-events:none;}
.hero-inner{position:relative;max-width:780px;margin:0 auto;z-index:1;}
.hero-badge{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);padding:6px 16px;border-radius:999px;font-size:13px;letter-spacing:1px;margin-bottom:22px;}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;letter-spacing:1px;}
.hero h1 .hl{color:#FFE08A;}
.subtitle{font-size:18px;margin:22px auto 0;max-width:620px;opacity:.94;}
.hero-actions{margin-top:36px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.btn-primary{display:inline-block;background:#fff;color:var(--flame);padding:14px 32px;border-radius:999px;font-weight:700;font-size:16px;text-decoration:none;transition:transform .15s;}
.btn-primary:hover{transform:translateY(-2px);}
.btn-ghost{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.5);color:#fff;padding:14px 32px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;transition:background .15s;}
.btn-ghost:hover{background:rgba(255,255,255,.22);}

/* ===== Stats ===== */
.stats{max-width:1120px;margin:-44px auto 0;padding:0 22px;position:relative;z-index:2;}
.stats-inner{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;}
.stat{padding:24px 18px;text-align:center;border-right:1px solid var(--border);}
.stat:last-child{border-right:none;}
.stat-num{font-size:30px;font-weight:800;color:var(--flame);line-height:1.1;}
.stat-label{font-size:13px;color:var(--muted);margin-top:6px;}

/* ===== Sections ===== */
.container{max-width:1120px;margin:0 auto;padding:72px 22px;}
.section-head{text-align:center;max-width:680px;margin:0 auto 44px;}
.section-head .eyebrow{display:inline-block;color:var(--flame);font-weight:700;font-size:14px;letter-spacing:1px;margin-bottom:8px;}
.section-head h2{font-size:34px;font-weight:800;letter-spacing:.5px;}
.section-head p{color:var(--muted);font-size:16px;margin-top:12px;}

/* ===== Course cards ===== */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;}
.path-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:22px;margin-bottom:22px;}
.path-note{font-size:13px;color:var(--muted);text-align:center;background:var(--bg-soft);border:1px dashed var(--border);border-radius:14px;padding:14px 18px;line-height:1.7;}
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:32px 28px;transition:box-shadow .22s,transform .22s;position:relative;overflow:hidden;}
.card:hover{box-shadow:var(--shadow);transform:translateY(-4px);}
.card-icon{width:58px;height:58px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
.card-icon svg{width:30px;height:30px;}
.icon-fire{background:var(--bg-soft);}
.icon-code{background:#EEF0FF;}
.icon-brain{background:#FFF8E6;}
.card h3{font-size:21px;margin-bottom:10px;font-weight:700;}
.card p{color:var(--muted);font-size:15px;}
.card .tag{display:inline-block;margin-top:16px;font-size:12px;color:var(--flame);background:var(--bg-soft);padding:4px 12px;border-radius:999px;}

/* ===== Features ===== */
.features{background:var(--bg-soft);}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:26px;}
.feature{display:flex;gap:16px;align-items:flex-start;}
.feature .f-dot{flex-shrink:0;width:44px;height:44px;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-soft);}
.feature .f-dot svg{width:22px;height:22px;}
.feature h4{font-size:17px;margin-bottom:5px;font-weight:700;}
.feature p{color:var(--muted);font-size:14px;}

/* ===== About ===== */
.about{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;}
.about-text-wrap p{color:var(--muted);font-size:16px;margin-bottom:16px;}
.about-text-wrap .lead{font-size:19px;color:var(--ink);font-weight:600;line-height:1.6;}
.about-visual{background:linear-gradient(135deg,#FF7A3D,#4F46E5);border-radius:24px;padding:40px;color:#fff;text-align:center;box-shadow:var(--shadow);}
.about-visual .av-quote{font-size:22px;font-weight:700;line-height:1.5;}

/* ===== CTA band ===== */
.cta-band{background:linear-gradient(120deg,#4F46E5,#FF6B35);border-radius:24px;padding:56px 40px;text-align:center;color:#fff;margin:0 auto;max-width:1120px;box-shadow:var(--shadow);}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:14px;}
.cta-band p{font-size:17px;opacity:.92;margin-bottom:28px;}
.cta-band .btn-white{display:inline-block;background:#fff;color:var(--indigo);padding:14px 36px;border-radius:999px;font-weight:700;font-size:16px;text-decoration:none;transition:transform .15s;}
.cta-band .btn-white:hover{transform:translateY(-2px);}

/* ===== Footer ===== */
.footer{background:#1E293B;color:#94A3B8;padding:44px 22px 30px;margin-top:72px;}
.footer-inner{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;}
.footer-brand img{width:40px;height:40px;}
.footer-links{display:flex;gap:22px;flex-wrap:wrap;}
.footer-links a{color:#94A3B8;text-decoration:none;font-size:14px;}
.footer-links a:hover{color:#fff;}
.footer-bottom{max-width:1120px;margin:24px auto 0;padding-top:20px;border-top:1px solid #334155;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.footer-bottom .beian{color:#94A3B8;text-decoration:none;transition:color .15s;}
.footer-bottom .beian:hover{color:#fff;text-decoration:underline;}

@media(max-width:860px){
  .about{grid-template-columns:1fr;gap:28px;}
  .stats-inner{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:none;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--border);}
}
/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:4px 22px;transition:box-shadow .2s,border-color .2s;}
.faq-item[open]{box-shadow:var(--shadow-soft);border-color:var(--flame-light);}
.faq-item summary{cursor:pointer;list-style:none;font-weight:700;font-size:17px;color:var(--ink);padding:16px 0;display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"";flex-shrink:0;width:18px;height:18px;background:var(--flame);clip-path:polygon(50% 20%,100% 50%,50% 80%,0 50%);transition:transform .2s;}
.faq-item[open] summary::after{transform:rotate(90deg);}
.faq-item p{color:var(--muted);font-size:15px;padding:0 0 18px;line-height:1.7;margin:0;}

@media(max-width:600px){
  .hero h1{font-size:32px;}
  .subtitle{font-size:15px;}
  .section-head h2{font-size:26px;}
  .nav-links a{padding:8px 10px;font-size:14px;}
  .nav-cta{display:none;}
}

/* ===== Booking Modal ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(30,41,59,.72);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:20px;z-index:100;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;}
.modal-overlay.active{opacity:1;visibility:visible;}
.modal-card{background:#fff;border-radius:22px;padding:28px 26px 24px;max-width:440px;width:100%;text-align:center;box-shadow:0 24px 60px rgba(30,41,59,.25);position:relative;transform:translateY(16px);transition:transform .25s;}
.modal-overlay.active .modal-card{transform:translateY(0);}
.modal-card h3{font-size:22px;font-weight:800;color:var(--ink);margin-bottom:8px;}
.modal-card p{color:var(--muted);font-size:14px;margin-bottom:18px;line-height:1.5;}
.modal-card img{width:100%;max-width:280px;height:auto;border-radius:12px;border:1px solid var(--border);display:block;margin:0 auto;}
.modal-card .modal-note{display:block;margin-top:14px;font-size:13px;color:var(--muted);}
.modal-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:28px;color:var(--muted);cursor:pointer;line-height:1;padding:0;width:36px;height:36px;border-radius:50%;transition:background .15s,color .15s;}
.modal-close:hover{background:var(--bg-soft);color:var(--ink);}

@media(max-width:480px){
  .modal-card{padding:24px 18px 20px;}
  .modal-card img{max-width:240px;}
}