:root{--ink:#28231d;--muted:#7b7165;--paper:#f5f1e9;--panel:#fffdf8e6;--line:#e2dbcf;--amber:#b35d1c;--amber-dark:#7d3e11;--amber-soft:#f8e6cd;--green:#47745b;--shadow:0 18px 50px #47321c17}*{box-sizing:border-box}html,body{min-height:100%}body{background:radial-gradient(circle at 8% 4%, #e0ad6729, transparent 25rem), radial-gradient(circle at 94% 92%, #698b701a, transparent 28rem), var(--paper);color:var(--ink);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}button,input,select{font:inherit}button{color:inherit}.app-shell{min-height:100vh;padding:20px}.topbar{align-items:center;gap:12px;max-width:1540px;height:66px;margin:0 auto 16px;display:flex}.brand-mark{background:linear-gradient(145deg,#d47c31,#8b4315);border-radius:14px 14px 14px 5px;place-items:center;width:42px;height:42px;display:grid;transform:rotate(-3deg);box-shadow:0 9px 22px #9a4c1638}.brand-mark:before,.brand-mark:after,.brand-mark 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