:root{color-scheme:dark;--bg:#0c1720;--side:#09131b;--card:#142633;--line:#294453;--accent:#7bd6fa;--muted:#8ca4b4;--text:#e4edf3}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 'Segoe UI','Microsoft YaHei',sans-serif}body[data-theme=purple]{--bg:#141321;--side:#0f101a;--card:#201f35;--line:#3c3758;--accent:#b6a0ff}body[data-theme=mint]{--bg:#101b19;--side:#0b1413;--card:#182b25;--line:#2b493f;--accent:#91e5bf}aside{position:fixed;top:0;bottom:0;left:0;width:240px;padding:35px 24px;background:var(--side);border-right:1px solid var(--line);overflow:auto}.brand{display:flex;gap:14px;align-items:center;font-weight:700;font-size:25px;color:var(--text);text-decoration:none}.brand b{display:grid;place-items:center;width:54px;height:54px;background:var(--accent);color:#0d2836;border-radius:15px;font-size:34px}.brand small{display:block;font-size:9px;letter-spacing:.8px;color:var(--muted)}.tagline{font-size:13px;margin:28px 0 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