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28px)}}:root{color-scheme:light;--ink:#111827;--ink-soft:#4b5563;--paper:#fff;--surface:#f4f6f9;--surface-strong:#e5e9f0;--line:#d5dbe3;--brand:#0e7490;--brand-strong:#155e75;--brand-soft:#e6f3f7;--signal:#c24c2c;--gold:#a36b0d;--dark:#0b1220;--dark-raised:#131d30;--dark-line:#24304a;--on-dark:#f3f6fa;--on-dark-soft:#c3ccd8;--on-dark-muted:#8b96a8;--on-dark-accent:#8ad8e8;--muted-control:#6b7280;--focus:#006fdd;--page:1200px;--page-wide:1280px;--gutter:20px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow:0 18px 50px #0b12201f;--shadow-soft:0 10px 30px #0b122012;font-synthesis:none;font-family:Segoe UI,Microsoft YaHei UI,Microsoft YaHei,Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{min-width:320px;color:var(--ink);background:var(--paper);margin:0;font-size:16px;line-height:1.65}img{max-width:100%;height:auto;display:block}a{color:inherit;text-underline-offset:3px;text-decoration-thickness:1px}button,a{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip-link{z-index:100;color:#fff;background:var(--focus);border-radius:4px;padding:8px 12px;position:fixed;top:8px;left:8px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.container{width:min(calc(100% - 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