:root{--ink:#17211b;--muted:#68736c;--line:#dce3de;--paper:#fff;--bg:#f4f7f5;--green:#176b45;--green-dark:#0e5134;--amber:#a8660d;--red:#a73a32;--blue:#2e5f91}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}button,input,select{font:inherit;color:inherit}a{color:inherit;text-decoration:none}.topbar{height:64px;background:#13241c;color:#fff;display:flex;align-items:center;padding:0 28px;gap:38px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px}.brand-mark{display:grid;place-items:center;width:32px;height:32px;background:#e6f1e9;color:#155c3d;font-weight:800;border-radius:6px}.brand-mark.large{width:48px;height:48px;font-size:22px}.topbar nav{display:flex;align-self:stretch}.nav-link{display:flex;align-items:center;padding:0 18px;color:#bac8c0;border-bottom:3px solid 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