:root{
  --primary:#4f46e5;
  --primary-2:#06b6d4;
  --ink:#0f172a;
  --muted:#64748b;
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --line:#e2e8f0;
  --radius:16px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.gradient-text{
  background:linear-gradient(120deg,var(--primary),var(--primary-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.8);backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--primary-2));display:grid;place-items:center;color:#fff;font-weight:900}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:var(--muted);font-weight:600;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.btn{
  display:inline-block;padding:12px 22px;border-radius:999px;font-weight:700;
  background:linear-gradient(120deg,var(--primary),var(--primary-2));color:#fff;
  box-shadow:0 8px 20px rgba(79,70,229,.35);transition:transform .15s,box-shadow .2s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(79,70,229,.45)}
.btn.ghost{background:#fff;color:var(--primary);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--primary)}

/* Hero */
.hero{padding:96px 0 72px;background:
  radial-gradient(900px 400px at 80% -10%,rgba(6,182,212,.18),transparent),
  radial-gradient(800px 400px at 0% 0%,rgba(79,70,229,.16),transparent);}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.15;letter-spacing:-.02em;font-weight:850}
.hero p.lead{margin:22px 0 30px;font-size:19px;color:var(--muted);max-width:640px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}

/* Sections */
section.block{padding:80px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:820;letter-spacing:-.01em}
.section-head p{color:var(--muted);margin-top:12px;font-size:17px}
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:transform .18s,box-shadow .2s,border-color .2s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-size:22px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

/* Stats */
.stats{background:linear-gradient(120deg,var(--primary),var(--primary-2));color:#fff;border-radius:24px;padding:48px 32px;text-align:center}
.stats .grid{margin-top:8px}
.stat .num{font-size:clamp(30px,4vw,44px);font-weight:850}
.stat .lbl{opacity:.92;margin-top:6px}

/* CTA band */
.cta-band{background:var(--bg-soft);border:1px solid var(--line);border-radius:24px;padding:56px 32px;text-align:center}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:820}
.cta-band p{color:var(--muted);margin:14px 0 26px}

/* Footer */
.site-footer{background:var(--ink);color:#cbd5e1;padding:48px 0 32px;margin-top:40px}
.site-footer a{color:#cbd5e1}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.site-footer ul{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:14px}
.site-footer .copy{border-top:1px solid #1e293b;margin-top:32px;padding-top:20px;font-size:13px;color:#94a3b8}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
form .field{margin-bottom:18px}
form label{display:block;font-weight:600;margin-bottom:7px;font-size:14px}
form input,form textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--ink);
}
form input:focus,form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.15)}
.info-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.info-card p{color:var(--muted);margin-bottom:10px}
.info-card strong{color:var(--ink)}

/* Responsive */
@media (max-width:860px){
  .grid.cols-3,.grid.cols-2,.contact-grid,.site-footer .cols{grid-template-columns:1fr}
  .nav-links{display:none}
  .hero{padding:64px 0 48px}
  section.block{padding:56px 0}
}