:root{--ink: #101828;--ink-soft: #475467;--muted: #667085;--line: #e4e7ec;--line-soft: #f0f2f5;--surface: #ffffff;--surface-sunk: #f7f9f8;--accent: #008060;--accent-strong: #004c3f;--accent-tint: #e6f3ef;--warn-tint: #fdf3e6;--warn-ink: #8a5a00;--radius: 14px;--radius-sm: 9px;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .04);--shadow-lg: 0 24px 48px -24px rgba(16, 24, 40, .18);--maxw: 1120px}@media(prefers-color-scheme:dark){:root{--ink: #f5f6f7;--ink-soft: #c3c8cf;--muted: #98a2b3;--line: #2a3140;--line-soft: #212836;--surface: #151a24;--surface-sunk: #10141c;--accent: #2eb88a;--accent-strong: #7fe3c0;--accent-tint: #12312a;--warn-tint: #33270f;--warn-ink: #f0c274;--shadow-lg: 0 24px 48px -24px rgba(0, 0, 0, .6)}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--surface);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 88%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft)}.nav__inner{display:flex;align-items:center;gap:28px;height:64px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:650;font-size:17px;letter-spacing:-.01em}.brand:hover{text-decoration:none}.brand__mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(145deg,var(--accent),var(--accent-strong));display:grid;place-items:center;flex:none}.nav__links{display:flex;gap:22px;margin-left:auto;align-items:center}.nav__links a:not(.btn){color:var(--ink-soft);font-size:15px}.nav__links a:not(.btn):hover{color:var(--ink);text-decoration:none}@media(max-width:720px){.nav__links a.is-optional{display:none}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:560;font-family:inherit;cursor:pointer;transition:transform .06s ease,background .15s ease,border-color .15s ease;white-space:nowrap}.btn:hover{text-decoration:none}.btn:active{transform:translateY(1px)}.btn--primary{background:var(--accent);color:#fff}.btn--primary:hover{background:var(--accent-strong);color:#fff}.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}.btn--ghost:hover{background:var(--surface-sunk);color:var(--ink)}.btn--sm{padding:8px 14px;font-size:14px}.hero{position:relative;overflow:hidden;padding:84px 0 64px;background:radial-gradient(900px 420px at 50% -180px,var(--accent-tint),transparent 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var(--accent-tint)}.faq{max-width:720px;margin:0 auto;display:grid;gap:14px}.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);padding:16px 18px}.faq summary{cursor:pointer;font-weight:580;font-size:15.5px;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";float:right;color:var(--muted);font-weight:400}.faq details[open] summary:after{content:"−"}.faq p{color:var(--ink-soft);font-size:15px;margin:12px 0 0}.footer{border-top:1px solid var(--line-soft);padding:34px 0;color:var(--muted);font-size:14px}.footer__inner{display:flex;flex-wrap:wrap;gap:14px 24px;align-items:center}.footer__links{margin-left:auto;display:flex;gap:20px;flex-wrap:wrap}.footer__links a{color:var(--ink-soft)}.prose{max-width:720px;margin:0 auto;padding:56px 24px 72px}.prose h1{font-size:clamp(28px,4vw,38px);font-weight:680}.prose h2{font-size:21px;font-weight:640;margin:38px 0 10px}.prose 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