:root{--ink:#181d26;--muted:#667085;--blue:#1b61c9;--blue-soft:#eef5ff;--green:#16865b;--green-soft:#eaf8f2;--amber:#b76a13;--amber-soft:#fff5e5;--red:#b42318;--red-soft:#fff0ee;--line:#e2e8f0;--surface:#fff;--canvas:#f5f8fc;--shadow:0 8px 28px rgba(15,48,106,.08);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--ink);font-family:"Aptos","Segoe UI Variable","Segoe UI",system-ui,sans-serif;letter-spacing:.01em}.topbar{height:72px;padding:0 max(20px,calc((100vw - 1240px)/2));display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none}.brand-mark,.login-badge{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 3px 10px rgba(27,97,201,.28)}.brand 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