:root{--bg:#090a0d;--panel:#121419;--panel2:#181b21;--gold:#c7a35a;--gold2:#f1d28d;--text:#f7f4ed;--muted:#9c9b96;--line:#2b2c30;--danger:#d36b62}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:17px}button,input,textarea,select{font:inherit}button{cursor:pointer}.shell{min-height:100vh;display:grid;grid-template-columns:300px 1fr}.sidebar{position:sticky;top:0;height:100vh;background:linear-gradient(180deg,#101116,#090a0d);border-right:1px solid #24252a;padding:28px 22px;display:flex;flex-direction:column}.brand{display:flex;gap:14px;align-items:center;padding-bottom:24px;border-bottom:1px solid var(--line)}.brand img{width:64px;height:50px;object-fit:contain;background:#fff;border-radius:8px}.brand strong{display:block;font-size:18px}.brand small{color:var(--gold);font-size:10px;letter-spacing:1.8px}nav{overflow:auto;padding:12px 0}nav 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