:root {
  --ink:#1d1d1f; --muted:#56565a; --paper:#fff; --gray:#f5f5f7;
  --border:#d2d2d7; --blue:#0066cc; --button:#0071e3;
  color-scheme:light; color:var(--ink); background:var(--paper);
  font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  scroll-behavior:smooth;
}
*{box-sizing:border-box}
body,p,h1,h2,h3,figure{margin:0}
a{color:inherit}
.wrap{width:min(calc(100% - clamp(36px,10vw,144px)),1140px);margin-inline:auto}
.skip{position:fixed;top:-80px;left:16px;z-index:2;padding:10px;background:white}
.skip:focus{top:10px}
:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
.header{background:var(--paper);border-bottom:1px solid #e7e7eb}
.nav,.footer{display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav{min-height:62px}
.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-size:20px;font-weight:700;letter-spacing:-.03em;white-space:nowrap}
.navlinks{display:flex;gap:clamp(14px,3vw,34px);font-size:14px}
.navlinks a{text-decoration:none}
.navlinks a:hover{color:var(--blue);text-decoration:underline}
.hero{background:var(--gray)}
.hero-layout{display:grid;grid-template-columns:1.12fr 1fr;gap:clamp(30px,6vw,90px);align-items:center;padding-block:clamp(54px,9vw,116px)}
h1,h2,h3{line-height:1.08;letter-spacing:-.04em;text-wrap:balance}
h1{font-size:clamp(42px,6.4vw,84px);font-weight:730}
h2{font-size:clamp(31px,4.5vw,50px);font-weight:700}
h3{font-size:22px}
.lead{font-size:clamp(17px,2vw,21px);color:var(--muted);margin:22px 0 25px;max-width:41ch}
.button{display:inline-flex;align-items:center;gap:8px;padding:11px 17px;border-radius:22px;color:white;background:var(--button);font-size:14px;font-weight:650;text-decoration:none}
.button:hover{background:#0066cc}
.flow{min-width:0;padding:clamp(16px,2.5vw,28px);border:1px solid #e0e0e5;border-radius:18px;background:var(--paper)}
.flow figcaption{font-size:17px;font-weight:650;line-height:1.3;margin-bottom:16px}
.flow ol{list-style:none;margin:0;padding:0}
.flow li:not(.connector){display:flex;gap:12px;align-items:center;padding:12px;border:1px solid #e1e1e6;border-radius:9px}
.flow li.stored{background:#eef6ff;border-color:#cbdff3}
.flow svg{width:22px;height:22px;flex:none;fill:none;stroke:var(--blue);stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}
.flow strong,.flow span{display:block}
.flow strong{font-size:14px;line-height:1.3;margin-bottom:3px}
.flow span,.connector{color:var(--muted);font-size:13px;line-height:1.4}
.connector{display:flex;align-items:center;gap:8px;min-height:28px;padding-left:19px}
.connector::before{content:"↓";color:var(--blue);font-weight:700}
.block{padding-block:clamp(48px,7vw,90px)}
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,4vw,48px);margin-top:30px}
.benefits>div{border-top:1px solid var(--border);padding-top:17px}
.block p{color:var(--muted);margin-top:12px;font-size:17px;max-width:62ch}
.rag{background:var(--gray)}
.rag-layout,.evaluation{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,6vw,80px);align-items:center}
.rag-note{background:var(--paper);padding:clamp(18px,3vw,32px);border-radius:13px}
.evaluation p{margin:0}
footer{border-top:1px solid #e7e7eb;background:var(--gray)}
.footer{padding-block:21px;font-size:13px;color:var(--muted)}
.footer .brand{font-size:17px;color:var(--ink)}
@media(max-width:730px){
  .hero-layout,.rag-layout,.evaluation{grid-template-columns:1fr}
  .hero-layout{gap:30px}
  .benefits{grid-template-columns:1fr}
}
@media(max-width:365px){
  .nav{align-items:flex-start;flex-direction:column;justify-content:center;padding-block:12px;gap:10px}
  .footer{align-items:flex-start;flex-direction:column}
}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}}