:root{--bg:#f5f6f8;--surface:#ffffff;--surface-muted:#fafbfc;--text:#15181e;--muted:#5c6472;--border:#e3e6eb;--brand:#2f5bff;--brand-soft:#eef2ff;--ok:#12805c;--ok-soft:#e9f7f1;--warn:#9a6100;--warn-soft:#fff6e5;--err:#b42318;--err-soft:#fef3f2;--radius:14px;--shadow:0 1px 2px rgba(16,24,40,0.04),0 8px 24px rgba(16,24,40,0.06)}html[data-theme=dark]{--bg:#0f1115;--surface:#171a20;--surface-muted:#1b1f27;--text:#e9ecf1;--muted:#9aa3b2;--border:#262b34;--brand:#8aa2ff;--brand-soft:#1c2340;--ok:#4ade9f;--ok-soft:#14251d;--warn:#e2b34a;--warn-soft:#2a2313;--err:#ff8b7d;--err-soft:#2b1a18;--shadow:0 1px 2px rgba(0,0,0,0.35),0 10px 28px rgba(0,0,0,0.35)}html[data-theme=dark] .topbar{background:rgba(23,26,32,.9)}html[data-theme=dark] .code-block{background:#0b0e14}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica 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