:root{--bg:#f7f7fb;--surface:#fff;--text:#16162a;--muted:#5c5c75;--border:#e3e3ee;--brand:#5b4cf0;--brand-strong:#4638d4;--brand-soft:#eeecff;--ok:#12805c;--ok-soft:#e3f6ee;--err:#b3261e;--err-soft:#fdecea;--radius:14px;--shadow:0 1px 2px #16162a0d, 0 8px 24px #16162a0f}@media (prefers-color-scheme:dark){:root{--bg:#0f0f1a;--surface:#191928;--text:#ececf5;--muted:#a3a3bd;--border:#2c2c42;--brand:#8b7fff;--brand-strong:#a399ff;--brand-soft:#25224a;--ok:#5fd3a6;--ok-soft:#12332a;--err:#ff8a80;--err-soft:#3b1a18;--shadow:none}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}a{color:var(--brand)}a:hover{color:var(--brand-strong)}img{max-width:100%}.wrap{width:100%;max-width:880px;margin:0 auto;padding:0 16px}.site-header{border-bottom:1px solid var(--border);background:var(--surface)}.site-header 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