:root{--bg:#071421;--panel:#0b1e30;--panel2:#0e263b;--line:#214057;--text:#edf6fb;--muted:#93adbd;--cyan:#38c8df;--blue:#4c8dff;--amber:#ffbd59;--red:#fa7878;--green:#62d69b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 Inter,"Microsoft YaHei",sans-serif}.shell{min-height:100vh;display:grid;grid-template-columns:232px 1fr}.side{border-right:1px solid var(--line);padding:25px 16px;display:flex;flex-direction:column;background:#081927}.brand{display:flex;gap:11px;color:var(--text);text-decoration:none;font-size:21px;font-weight:700;align-items:center;padding:0 9px 29px}.brand small{display:block;font-size:11px;color:var(--muted);font-weight:400}.brand-mark{color:var(--cyan);font-size:34px;line-height:22px}nav{display:grid;gap:5px}nav button{border:0;background:transparent;color:#afc1cc;text-align:left;padding:11px 12px;border-radius:7px;font:inherit;cursor:pointer}nav button:hover,nav button.active{background:#123149;color:#fff}nav 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