:root{--ink:#263740;--muted:#718089;--paper:#f6f7f8;--red:#a53a35;--wood:#e2c195;--line:#987044;--serif:'KaiTi','STKaiti','Noto Serif SC','SimSun',serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 'Microsoft YaHei',system-ui,sans-serif}button,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #568ca0;outline-offset:4px}.app{max-width:1140px;padding:0 42px;margin:auto}header{height:110px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dce1e4}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font:700 28px var(--serif);letter-spacing:4px}.seal{display:grid;place-items:center;border:2px solid var(--red);color:var(--red);width:42px;height:46px;font-size:28px;border-radius:4px}.brand-small{font:12px 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