:root{font-family:Noto Sans TC,Microsoft JhengHei,system-ui,sans-serif;color:#24312f;background:#fff;--teal:#145b55;--teal-dark:#173c38;--soft:#f3f7f6;--line:#dbe4e2;--muted:#6d7a77;--copper:#aa6840;--red:#b43a35}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{min-height:100vh;display:grid;grid-template-columns:250px minmax(0,1fr)}.sidebar{height:100vh;position:sticky;top:0;background:var(--teal-dark);color:#fff;padding:22px 15px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;align-items:center;gap:11px;padding:0 7px 20px;border-bottom:1px solid #ffffff20}.brand-mark{width:40px;height:40px;display:grid;place-items:center;background:#fff;color:var(--teal);font-weight:900;font-size:20px}.brand strong,.brand span{display:block}.brand span{font-size:12px;color:#b9ceca;margin-top:3px}.mobile-close{display:none}.sidebar nav{display:grid;gap:4px;padding-top:18px}.sidebar nav 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