:root{--bg:#f7f8f6;--card:#fff;--ink:#14201b;--muted:#5a6862;--brand:#128c5e;--brand-2:#25d366;--line:#e3e8e5}
@media (prefers-color-scheme:dark){:root{--bg:#0e1512;--card:#16201c;--ink:#e8efeb;--muted:#9aaba3;--line:#25332d}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--brand)}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
nav{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:1.2rem;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--brand);color:#fff;font-size:.95rem}
nav .links a{margin-left:20px;text-decoration:none;color:var(--muted);font-size:.95rem}
nav .links a.cta{color:var(--brand);font-weight:700}
@media (max-width:640px){nav .links a:not(.cta){display:none}}
.hero{padding:72px 0 56px}
.hero h1{font-size:clamp(2rem,5.5vw,3.4rem);line-height:1.1;margin:0 0 16px;max-width:760px}
.hero p{font-size:1.15rem;color:var(--muted);max-width:620px;margin:0 0 28px}
.btn{display:inline-block;padding:13px 22px;border-radius:999px;font-weight:700;text-decoration:none;background:var(--brand);color:#fff}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);margin-left:8px}
section{padding:56px 0;border-top:1px solid var(--line)}
h2{font-size:1.7rem;margin:0 0 8px}
.lead{color:var(--muted);margin:0 0 28px;max-width:640px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.card h3{margin:0 0 6px;font-size:1.1rem}
.card p{margin:0;color:var(--muted)}
.tag{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--brand);margin-bottom:8px}
ol.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
ol.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
ol.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;margin-bottom:10px}
.chat{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;max-width:420px;display:flex;flex-direction:column;gap:8px}
.msg{padding:9px 13px;border-radius:14px;max-width:85%;font-size:.95rem}
.msg.in{background:color-mix(in srgb,var(--muted) 14%,transparent);align-self:flex-start}
.msg.out{background:color-mix(in srgb,var(--brand-2) 28%,transparent);align-self:flex-end}
.split{display:grid;gap:32px;grid-template-columns:1fr 1fr;align-items:center}
@media (max-width:760px){.split{grid-template-columns:1fr}}
footer{padding:32px 0 48px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--muted)}
.doc{padding:48px 0 64px;max-width:760px}
.doc h1{font-size:2rem;margin:0 0 4px}
.doc h2{font-size:1.25rem;margin:32px 0 8px}
.doc .meta{color:var(--muted);margin:0 0 24px}