:root{--bg:#07111b;--surface:#0d1d2a;--surface2:#122739;--text:#f4f8fb;--muted:#a8bdc8;--line:rgba(173,221,231,.14);--aqua:#6ff7d0;--orange:#ffb45b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 15% 0%,#14374a 0,#07111b 40%),#07111b;color:var(--text);font:16px/1.7 Arial,"Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}.topbar{position:sticky;top:0;z-index:10;background:rgba(7,17,27,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:76px;display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;white-space:nowrap}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--aqua),#3fc1ff);display:grid;place-items:center;color:#09202a;box-shadow:0 0 28px 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