:root{--ink:#17201c;--muted:#6e7772;--line:#dfe5e1;--paper:#fff;--canvas:#f3f5f3;--green:#1e5b45;--green-dark:#174635;--gold:#b27a26;--red:#a64646;--blue:#386f91;box-sizing:border-box;font-family:"Microsoft YaHei",Arial,sans-serif;color:var(--ink)}*{box-sizing:inherit}body{margin:0;background:var(--canvas);font-size:14px}button,input,select,textarea{font:inherit}button{letter-spacing:0}.hidden{display:none!important}.topbar{position:sticky;top:0;z-index:50;height:68px;display:grid;grid-template-columns:220px 1fr 235px;align-items:stretch;padding:0 32px;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;flex-direction:column;justify-content:center;color:var(--ink);text-decoration:none}.brand strong{font-size:16px}.brand small,.user-area small{margin-top:3px;color:var(--muted);font-size:10px}.topbar nav{display:flex;justify-content:center}.topbar nav button{position:relative;padding:0 14px;border:0;border-bottom:3px solid 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