:root{--bg:#090b1c;--panel:rgba(23,28,57,.78);--line:rgba(164,182,255,.15);--text:#f5f7ff;--muted:#98a3ca;--cyan:#51e5ff;--violet:#8a63ff;--mint:#59f5c2}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 75% 10%,#25245b 0,transparent 29%),radial-gradient(circle at 12% 85%,#103d5b 0,transparent 28%),var(--bg);color:var(--text);font:15px/1.5 "Microsoft YaHei",system-ui,sans-serif}.shell{display:grid;grid-template-columns:236px minmax(0,1fr);min-height:100vh}.side{position:relative;padding:28px 18px;border-right:1px solid var(--line);background:rgba(6,8,24,.58);backdrop-filter:blur(18px)}.brand{display:flex;gap:11px;align-items:center;margin:0 10px 42px;color:var(--text);font-size:21px;font-weight:800;text-decoration:none}.spark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));color:#111435;box-shadow:0 0 25px #5b68ff88}.nav{display:grid;gap:8px}.nav 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