:root{--bg:#050816;--panel:#0b1127;--text:#f4f7ff;--muted:#9aa8c7;--cyan:#00d8ff;--violet:#8b3dff;--line:rgba(151,180,255,.16)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.65;overflow-x:hidden}.grid{position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 70%);opacity:.24}.shell{width:min(1180px,calc(100% - 40px));margin:auto}.nav{height:88px;display:flex;align-items:center;justify-content:space-between;position:relative;z-index:5;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font-weight:800;letter-spacing:.12em}.brand img{width:38px;height:38px;object-fit:contain}.nav 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