:root{--bg:#ffffff;--bg-sunken:#f6f6f5;--bg-raised:#ffffff;--bg-invert:#0a0e1c;--text:#111111;--text-secondary:#5b5f66;--text-tertiary:#8b9098;--text-on-invert:#f4f6fb;--hairline:#e6e6e3;--hairline-strong:#d9d9d5;--accent:#2f6bff;--accent-ink:#1d4ed8;--grad-from:#12d9f5;--grad-mid:#2f6bff;--grad-to:#7b3bff;--radius-sm:10px;--radius:16px;--radius-lg:24px;--radius-pill:999px;--measure:1120px;--gutter:24px;--shadow-card:0 1px 2px rgba(17,17,17,0.04),0 8px 28px rgba(17,17,17,0.06);--shadow-lift:0 2px 6px rgba(17,17,17,0.06),0 20px 60px rgba(17,17,17,0.1)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#101114;--bg-sunken:#17181c;--bg-raised:#1c1e23;--bg-invert:#06080f;--text:#f5f6f7;--text-secondary:#a8adb5;--text-tertiary:#7c828b;--hairline:#2a2d33;--hairline-strong:#383c44;--accent:#6c95ff;--accent-ink:#9ab4ff;--shadow-card:0 1px 2px rgba(0,0,0,0.4),0 8px 28px rgba(0,0,0,0.35);--shadow-lift:0 2px 6px rgba(0,0,0,0.45),0 20px 60px rgba(0,0,0,0.5)}}:root[data-theme=dark]{--bg:#101114;--bg-sunken:#17181c;--bg-raised:#1c1e23;--bg-invert:#06080f;--text:#f5f6f7;--text-secondary:#a8adb5;--text-tertiary:#7c828b;--hairline:#2a2d33;--hairline-strong:#383c44;--accent:#6c95ff;--accent-ink:#9ab4ff;--shadow-card:0 1px 2px rgba(0,0,0,0.4),0 8px 28px rgba(0,0,0,0.35);--shadow-lift:0 2px 6px rgba(0,0,0,0.45),0 20px 60px rgba(0,0,0,0.5)}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans),-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang TC","Noto Sans 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solid rgba(255,255,255,.14)}.privacy-item h4{font-size:16.5px;display:flex;align-items:center;gap:9px}.privacy-item h4 svg{color:var(--grad-from)}.privacy-item p{margin-top:8px;font-size:14.5px;line-height:1.62;color:rgba(244,246,251,.66)}.privacy-actions{position:relative;margin-top:42px;display:flex;flex-wrap:wrap;gap:12px}.privacy-panel .btn-primary{background:#fff;color:#0a0e1c}.privacy-panel .btn-secondary{color:#fff;border-color:rgba(255,255,255,.28)}.faq{margin-top:40px;border-top:1px solid var(--hairline)}.faq details{border-bottom:1px solid var(--hairline)}.faq summary{cursor:pointer;list-style:none;padding:22px 44px 22px 0;font-size:17px;font-weight:600;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"";position:absolute;right:8px;top:30px;width:10px;height:10px;border-right:1.6px solid var(--text-tertiary);border-bottom:1.6px solid var(--text-tertiary);transform:rotate(45deg);transition:transform .2s ease}.faq details[open] summary:after{transform:rotate(-135deg);top:34px}.faq-answer{padding:0 8px 24px 0;font-size:15.5px;line-height:1.7;color:var(--text-secondary);max-width:68ch}.faq-answer p+p{margin-top:12px}.cta{text-align:center;padding-block:clamp(72px,9vw,120px)}.cta h2{font-size:clamp(30px,4.6vw,50px)}.cta p{margin:18px auto 0;max-width:54ch;color:var(--text-secondary);font-size:18px}.cta-actions{margin-top:32px;display:flex;justify-content:center;flex-wrap:wrap;gap:12px}.site-footer{border-top:1px solid var(--hairline);background:var(--bg-sunken);padding-block:56px 40px}.footer-grid{display:grid;grid-gap:36px;gap:36px;grid-template-columns:minmax(220px,1.3fr) repeat(auto-fit,minmax(150px,1fr))}.footer-brand p{margin-top:14px;max-width:34ch;font-size:14.5px;color:var(--text-secondary)}.footer-col h5{margin:0 0 14px;font-size:12.5px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--text-tertiary)}.footer-col ul{margin:0;padding:0;list-style:none;display:grid;grid-gap:10px;gap:10px}.footer-col a{font-size:15px;color:var(--text-secondary)}.footer-col a:hover{color:var(--text)}.footer-base{margin-top:44px;padding-top:22px;border-top:1px solid var(--hairline);display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;font-size:13.5px;color:var(--text-tertiary)}.doc-header{padding-block:clamp(48px,6vw,80px) 28px;border-bottom:1px solid var(--hairline)}.doc-header h1{font-size:clamp(32px,4.6vw,46px)}.doc-meta{margin-top:18px;display:flex;flex-wrap:wrap;gap:6px 20px;font-size:14px;color:var(--text-tertiary)}.doc-body{padding-block:12px 96px}.callout{margin:28px 0;padding:20px 22px;border:1px solid var(--hairline);border-left:3px solid var(--accent);border-radius:var(--radius);background:var(--bg-sunken);font-size:15.5px;line-height:1.68}.callout strong{color:var(--text)}.toc{margin:30px 0 8px;padding:22px 24px;border:1px solid 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