:root{--bg: #f6f7fb;--surface: #ffffff;--text: #1a2233;--muted: #6b7487;--border: #dde1ea;--primary: #2f6fed;--primary-text: #ffffff;--danger: #d64545;--warn-bg: #fff7e0;--warn-border: #e8c96a;--ok: #2e9e5b;--code-bg: #eef1f7;font-family:Segoe UI,system-ui,-apple-system,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #12151c;--surface: #1b2029;--text: #e8ebf2;--muted: #97a0b3;--border: #303747;--primary: #5b8cff;--danger: #ff6b6b;--warn-bg: #3a3320;--warn-border: #8a7a3a;--ok: #4cc47e;--code-bg: #262c38}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.app{min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.logo{font-size:1.15rem;margin:0;cursor:pointer}.content{max-width:980px;margin:0 auto;padding:24px 20px 80px}h2{margin:0 0 6px}h3{margin:0 0 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