:root{--bg:#0f1419;--fg:#e7e9ea;--muted:#8899a6;--card:#0b1014;--border:rgba(255,255,255,0.12);--accent:#1d9bf0;--accent-weak:rgba(29,155,240,0.15);--shadow:0 10px 30px rgba(0,0,0,0.35)}
@media (prefers-color-scheme: light){:root{--bg:#f7f9f9;--fg:#0f1419;--muted:#536471;--card:#ffffff;--border:rgba(0,0,0,0.12);--accent:#1d9bf0;--accent-weak:rgba(29,155,240,0.10);--shadow:0 10px 30px rgba(0,0,0,0.08)}}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:radial-gradient(90vw 60vh at 60% -20%,rgba(29,155,240,.15),transparent),var(--bg)}
.container{max-width:1040px;margin:0 auto;padding:24px}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand .logo{width:28px;height:28px;border-radius:8px;display:inline-grid;place-items:center;background:#0f1419;border:1px solid var(--border);box-shadow:var(--shadow)}
.nav a{color:var(--fg);text-decoration:none;opacity:.9}
.nav a:hover{opacity:1}
.lang{display:flex;align-items:center;gap:8px}
select{appearance:none;background:var(--card);border:1px solid var(--border);color:var(--fg);border-radius:10px;padding:8px 12px}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;margin-top:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:18px}
.hero h1{margin:0 0 10px;font-size:28px;letter-spacing:.2px}
.hero .subtitle{color:var(--muted)}
.cta{display:flex;gap:12px;margin-top:16px}
.btn{display:inline-block;border:none;border-radius:12px;padding:10px 14px;font-weight:700;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px var(--accent-weak)}
.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--fg)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:22px}
.feat{padding:14px;border-radius:14px;border:1px solid var(--border);background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.feat h3{margin:0 0 6px;font-size:14px}
.muted{color:var(--muted)}
.section{margin-top:36px}
.footer{margin-top:36px;padding:14px 0;color:var(--muted);border-top:1px solid var(--border)}
.list{display:grid;gap:10px}
.kbd{display:inline-block;border:1px solid var(--border);border-radius:8px;padding:2px 6px;background:var(--card)}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace}
.wide{grid-column:1/-1}
@media (max-width:920px){.hero{grid-template-columns:1fr}.grid{grid-template-columns:1fr}}