:root{--brand:#0f5e8c;--brand-dark:#0a4568;--accent:#1f9d63;--ink:#1a2733;--muted:#5b6b7a;--bg:#ffffff;--soft:#f4f7fa;--line:#e4eaf0}
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
  a{color:var(--brand);text-decoration:none}
  .container{max-width:1120px;margin:0 auto;padding:0 24px}
  /* header */
  header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:68px}
  .logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--ink)}
  .logo .mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem}
  .nav-links{display:flex;gap:28px;align-items:center}
  .nav-links a{color:var(--muted);font-size:.95rem;font-weight:500}
  .nav-links a:hover{color:var(--brand)}
  .btn{display:inline-block;background:var(--brand);color:#fff;padding:11px 22px;border-radius:8px;font-weight:600;font-size:.95rem;border:none;cursor:pointer}
  .btn:hover{background:var(--brand-dark)}
  /* hero */
  .hero{background:linear-gradient(160deg,#f0f6fb 0%,#e7f2f8 100%);border-bottom:1px solid var(--line);padding:72px 0 64px}
  .hero h1{font-size:2.4rem;line-height:1.2;font-weight:800;max-width:720px;margin-bottom:18px}
  .hero h1 span{color:var(--brand)}
  .hero p{color:var(--muted);font-size:1.12rem;max-width:620px;margin-bottom:28px}
  .hero .actions{display:flex;gap:14px;flex-wrap:wrap}
  .btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--line)}
  .btn.secondary:hover{background:var(--soft)}
  /* section */
  section{padding:64px 0}
  .section-title{font-size:1.7rem;font-weight:700;margin-bottom:10px}
  .section-sub{color:var(--muted);max-width:640px;margin-bottom:36px}
  .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
  .card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px;transition:transform .15s ease,box-shadow .15s ease}
  .card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(15,94,140,.10)}
  .card .icon{width:46px;height:46px;border-radius:10px;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:16px}
  .card h3{font-size:1.08rem;margin-bottom:8px}
  .card p{color:var(--muted);font-size:.95rem}
  /* about */
  .about{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .about .cols{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:start}
  .stats{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;text-align:center}
  .stat .num{font-size:1.7rem;font-weight:800;color:var(--brand)}
  .stat .lbl{color:var(--muted);font-size:.88rem}
  /* contact */
  .contact-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
  .contact-item{border:1px solid var(--line);border-radius:12px;padding:22px}
  .contact-item .k{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:6px}
  .contact-item .v{font-weight:600}
  footer{background:var(--ink);color:#c6d2dc;padding:36px 0;font-size:.88rem}
  footer .foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center}
  footer a{color:#c6d2dc}
  footer .req{color:#7e8d9b;font-size:.8rem;margin-top:8px}
  @media(max-width:720px){.nav-links{display:none}.hero h1{font-size:1.8rem}.about .cols{grid-template-columns:1fr}}