:root{--bg:#09090b;--panel:#131316;--card:#18181b;--line:#27272a;--txt:#fafafa;--mut:#a1a1aa;--pri:#25d366;--prih:#1eb856;--ok:#22c55e;--warn:#f59e0b}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--txt);line-height:1.6}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}.narrow{max-width:760px}
.nav{position:sticky;top:0;z-index:10;background:rgba(9,9,11,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:28px;height:62px}
.brand{display:flex;align-items:center;gap:10;font-weight:700;font-size:18px;color:var(--txt);text-decoration:none}
.logo{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9px;background:var(--pri);font-weight:800}
.links{display:flex;gap:22px;margin-left:auto}.links a{color:var(--mut);text-decoration:none;font-size:14px}.links a:hover{color:var(--txt)}
.btn{display:inline-block;background:var(--pri);color:#fff;text-decoration:none;padding:12px 24px;border-radius:9px;font-weight:600;font-size:15px;border:0;cursor:pointer}
.btn:hover{background:var(--prih)}.btn-sm{padding:8px 16px;font-size:14px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}.btn.ghost:hover{border-color:var(--pri)}
.hero{padding:72px 0 60px;background:radial-gradient(700px 340px at 80% 10%,rgba(37,211,102,.16),transparent)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.status{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--mut);border:1px solid var(--line);border-radius:99px;padding:5px 14px;margin-bottom:20px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--warn);animation:pulse 1.6s infinite}
.dot.ok{background:var(--ok);animation:none}.dot.bad{background:#ef4444;animation:none}
@keyframes pulse{50%{opacity:.35}}
h1{font-size:clamp(34px,5vw,54px);line-height:1.08;margin:0 0 18px}.accent{color:#4ade80}
.lede{color:var(--mut);font-size:17px;max-width:34em}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 18px}.cta.center{justify-content:center;margin-top:34px}
.meta{color:var(--mut);font-size:13px}.sep{margin:0 8px}
.hero-art{display:grid;gap:16px}
.phone{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:16px;max-width:300px}
.phone-bar{width:90px;height:5px;border-radius:99px;background:var(--line);margin:0 auto 14px}
.chat{display:grid;gap:8px;margin-bottom:14px}
.bubble{margin:0;padding:9px 13px;border-radius:14px;font-size:13.5px;max-width:88%}
.bubble.in{background:var(--card);border:1px solid var(--line);justify-self:start}
.bubble.out{background:var(--pri);color:#062d1a;justify-self:end}
.qr{width:120px;height:120px;margin:0 auto;border-radius:10px;background:repeating-conic-gradient(#e4e4e7 0 25%,#09090b 0 50%) 0 0/24px 24px;border:6px solid #e4e4e7}
.term{background:#0c0c0e;border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:13px}
.term-bar{display:flex;gap:6px;padding:10px 14px;border-bottom:1px solid var(--line)}
.term-bar i{width:11px;height:11px;border-radius:50%;background:var(--line)}
.term pre{margin:0;padding:16px;overflow-x:auto;color:#d4d4d8}.ok{color:var(--ok)}
.section{padding:64px 0}.section.alt{background:#0e0e11;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{font-size:30px;margin:0 0 10px}.sub{color:var(--mut);margin:0 0 30px;max-width:44em}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{margin:0 0 8px;font-size:17px}.card p{margin:0;color:var(--mut);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.n{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--pri);font-weight:700;margin-bottom:12px}
.step h3{margin:0 0 8px}.step p{margin:0;color:var(--mut);font-size:14.5px}
.codeblock{background:#0c0c0e;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.code-head{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line);color:var(--mut);font-size:13px}
.copy{background:transparent;border:1px solid var(--line);color:var(--txt);border-radius:7px;padding:5px 12px;cursor:pointer;font-size:13px}
.copy:hover{border-color:var(--pri)}
.codeblock pre{margin:0;padding:18px;overflow-x:auto;font-size:13.5px;color:#d4d4d8}
.endpoints{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.endpoints span{font-size:13px;color:var(--mut);border:1px solid var(--line);border-radius:99px;padding:5px 14px}
.endpoints b{color:#4ade80}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600}details p{color:var(--mut);margin:10px 0 0;font-size:15px}
footer{border-top:1px solid var(--line);padding:26px 0;color:var(--mut);font-size:14px}
.foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.foot a{color:var(--mut);text-decoration:none}.foot a:hover{color:var(--txt)}
@media(max-width:860px){.hero-in{grid-template-columns:1fr}.grid,.steps{grid-template-columns:1fr}.links{display:none}}