:root{--bg: #f6f7f9;--panel: #ffffff;--border: #e5e7eb;--text: #1f2937;--muted: #6b7280;--primary: #4f46e5;--primary-dark: #4338ca;--danger: #ef4444;--ok: #10b981;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}a{color:var(--primary)}.topbar{display:flex;align-items:center;justify-content:space-between;background:var(--panel);border-bottom:1px solid var(--border);padding:12px 24px;position:sticky;top:0;z-index:10}.topbar .brand{font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px}.topbar .brand .dot{width:22px;height:22px;border-radius:6px;background:var(--primary);display:inline-block}.container{max-width:1180px;margin:0 auto;padding:24px}.btn{border:1px solid var(--border);background:#fff;color:var(--text);padding:8px 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