:root{--ink:#0f2742;--blue:#1773d1;--green:#33a36b;--bg:#f6f8fb;--line:#dfe5ec;--muted:#617084}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.55}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:space-between;padding:14px 6vw;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;text-decoration:none}.brand img{display:block;width:230px;max-width:42vw;height:54px;object-fit:contain;object-position:left center}nav{display:flex;gap:26px}nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:14px}select{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px}main section{padding:84px 8vw}.hero{min-height:72vh;display:flex;flex-direction:column;justify-content:center;max-width:1120px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--blue);margin-bottom:12px}.hero h1{font-size:clamp(48px,7vw,92px);line-height:.98;max-width:950px;margin:0 0 26px}.lead{font-size:clamp(18px,2vw,25px);max-width:850px;color:#42526a}.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-block;padding:14px 20px;border-radius:10px;text-decoration:none;font-weight:750}.primary{background:var(--ink);color:#fff}.secondary{border:1px solid var(--ink);color:var(--ink)}.problem,.truth,.pilot{background:var(--bg);display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}.problem h2,.truth h2,.drawing h2,.trace h2,#how h2,.pilot h2,.demo h2{font-size:clamp(32px,4vw,54px);line-height:1.05;margin:0 0 20px}.problem p,.truth p,.drawing p,.pilot p,.demo p{font-size:19px;color:#485a70}.flow{display:flex;align-items:center;gap:10px;margin-top:38px;overflow:auto;padding-bottom:8px}.step{min-width:170px;border:1px solid var(--line);border-radius:14px;padding:20px;background:#fff}.step span{display:block;font-size:12px;color:var(--green);font-weight:800;margin-bottom:8px}.arrow{font-size:28px;color:#93a1b1}.demo{display:grid;grid-template-columns:1.05fr .95fr;gap:52px}.change-card{margin-top:28px;border:1px solid var(--line);border-radius:16px;padding:22px;display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center}.change-card small{display:block;color:var(--muted);font-weight:800}.change-card strong,.change-card em{display:block}.change-card em{font-style:normal;color:var(--muted);font-size:14px}.change-arrow{font-size:28px}.impact-card{background:var(--ink);color:#fff;border-radius:18px;padding:28px}.impact-card h3{margin-top:0}.impact-card ul{list-style:none;padding:0;margin:0}.impact-card li{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-top:1px solid rgba(255,255,255,.16)}.impact-card b{font-size:12px;color:#ffd166}.impact-card .ok b{color:#7bdca7}.formula{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}.formula span{background:var(--bg);padding:12px 16px;border-radius:10px;border:1px solid var(--line)}.trace-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}.trace-grid div{border:1px solid var(--line);border-radius:12px;padding:18px}.quote{font-size:clamp(24px,3vw,38px);font-weight:750;max-width:900px;margin-top:56px}.pilot{align-items:center}.pilot .btn{justify-self:start}footer{padding:28px 8vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted)}.footer-link{color:var(--ink);text-decoration:none}.footer-link:hover{text-decoration:underline}@media(max-width:800px){nav{display:none}.brand img{width:180px;max-width:60vw;height:46px}main section{padding:58px 6vw}.hero{min-height:68vh}.problem,.truth,.pilot,.demo{grid-template-columns:1fr;gap:28px}.flow{align-items:stretch}.step{min-width:145px}.change-card{grid-template-columns:1fr}.change-arrow{transform:rotate(90deg);justify-self:center}.trace-grid{grid-template-columns:1fr 1fr}footer{flex-direction:column;gap:6px}}

.btn, select { min-height: 44px; }
.impact-card li span { min-width: 0; }
.impact-card li b { text-align: right; flex: 0 0 auto; }
@media(max-width:520px){
  .topbar{padding:10px 5vw}
  .brand img{width:165px;max-width:62vw;height:42px}
  .hero h1{font-size:clamp(42px,13vw,58px)}
  .lead{font-size:18px}
  .cta-row{display:grid;grid-template-columns:1fr}
  .btn{text-align:center;width:100%}
  .impact-card{padding:22px}
  .impact-card li{align-items:flex-start}
  .impact-card li b{max-width:44%;line-height:1.25}
  .trace-grid{grid-template-columns:1fr}
  footer{font-size:14px}
}