:root{
  --bg:#f4f7fb;
  --surface:#ffffff;
  --surface-soft:#f8fbff;
  --text:#172033;
  --muted:#637083;
  --border:#dbe4ef;
  --accent:#2563eb;
  --accent-hover:#1d4ed8;
  --safe:#18864b;
  --shadow:0 14px 40px rgba(31,46,74,.08);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI",system-ui,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 50% -20%, #e8f2ff 0, transparent 38rem),
    var(--bg);
  line-height:1.6;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{
  position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(140%) blur(16px);
  background:rgba(244,247,251,.86);
  border-bottom:1px solid rgba(219,228,239,.9);
}
.nav{
  width:min(1100px,calc(100% - 36px));
  margin:auto;height:66px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(145deg,#eff6ff,#d9eaff);
  border:1px solid #cbdcf3;
  display:grid;place-items:center;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9);
}
.mark svg{width:19px;height:19px}
.nav-links{display:flex;gap:22px;align-items:center;font-size:14px}
.nav-links a{color:#4b5870}
.nav-links a:hover{color:var(--text);text-decoration:none}
.container{width:min(980px,calc(100% - 36px));margin:auto}
.hero{padding:94px 0 70px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  color:#4f5e73;background:rgba(255,255,255,.72);
  border:1px solid var(--border);
  border-radius:999px;padding:7px 12px;font-size:13px;font-weight:600;
}
h1,h2,h3{line-height:1.12;letter-spacing:-.03em;margin:0}
h1{font-size:clamp(42px,7vw,72px);max-width:870px;margin:20px auto 20px}
h2{font-size:clamp(30px,4vw,42px)}
h3{font-size:20px}
.lead{
  max-width:720px;margin:0 auto;
  font-size:clamp(18px,2.2vw,22px);color:var(--muted)
}
.actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:30px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 18px;border-radius:12px;
  border:1px solid var(--border);font-weight:600;font-size:15px
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);border-color:var(--accent);color:white}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:white;color:var(--text)}
.section{padding:64px 0}
.section.compact{padding:40px 0}
.section-heading{max-width:720px;margin-bottom:28px}
.section-heading p{color:var(--muted);font-size:18px;margin:12px 0 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow)
}
.card p{color:var(--muted);margin:9px 0 0}
.product-card{display:grid;grid-template-columns:84px 1fr;gap:22px;align-items:center}
.photo-icon{
  width:84px;height:84px;border-radius:22px;
  background:#f7fbff;border:1px solid #cfdeef;
  display:grid;place-items:center
}
.photo-icon svg{width:46px;height:46px}
.meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:16px
}
.pill{
  border:1px solid var(--border);background:#fafcff;color:#526078;
  border-radius:999px;padding:5px 10px;font-size:12px;font-weight:600
}
.safe{
  margin-top:20px;padding:14px 16px;
  border-radius:12px;border:1px solid #cdebd9;
  background:#f3fbf6;color:#1f7045;font-weight:600
}
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{
  counter-increment:step;background:var(--surface);border:1px solid var(--border);
  border-radius:16px;padding:22px
}
.step:before{
  content:counter(step);display:grid;place-items:center;
  width:30px;height:30px;border-radius:9px;background:#edf4ff;color:#275db7;
  font-weight:700;margin-bottom:18px
}
.step p{color:var(--muted);margin:7px 0 0;font-size:14px}
.notice{
  border-left:3px solid #9bbbe8;
  background:#f7faff;border-radius:0 14px 14px 0;
  padding:18px 20px;color:#4c5a70
}
.prose{max-width:800px;margin:0 auto}
.prose h1{font-size:46px;margin:0 0 16px;text-align:left}
.prose h2{font-size:26px;margin:42px 0 12px}
.prose h3{margin:26px 0 8px}
.prose p,.prose li{color:#4f5d72}
.prose ul{padding-left:20px}
.prose .updated{font-size:14px;color:#7c8797;margin-bottom:34px}
.footer{
  margin-top:60px;padding:34px 0 42px;border-top:1px solid var(--border);
  color:#778397;font-size:13px
}
.footer-inner{display:flex;gap:20px;justify-content:space-between;align-items:flex-start}
.footer-links{display:flex;flex-wrap:wrap;gap:18px}
.footer a{color:#647187}
.kicker{font-size:14px;font-weight:700;color:#55647b;text-transform:uppercase;letter-spacing:.09em}
.small{font-size:14px;color:var(--muted)}
@media (max-width:780px){
  .nav{height:auto;padding:14px 0;align-items:flex-start}
  .nav-links{gap:12px;flex-wrap:wrap;justify-content:flex-end}
  .hero{padding:68px 0 46px}
  .grid,.grid.two,.steps{grid-template-columns:1fr}
  .product-card{grid-template-columns:1fr}
  .photo-icon{width:70px;height:70px}
  .footer-inner{flex-direction:column}
}
@media (max-width:520px){
  .nav-links a:nth-child(1){display:none}
  h1{font-size:40px}
  .container,.nav{width:min(100% - 26px,980px)}
  .card{padding:21px}
}