:root{--bg:#060817;--panel:#0c1128;--text:#eef4ff;--muted:#9aaccd;--brand:#46d7ff;--violet:#8a5cff;--line:rgba(255,255,255,.12);--card:rgba(255,255,255,.065)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% 0%,rgba(70,215,255,.18),transparent 32%),radial-gradient(circle at 80% 12%,rgba(138,92,255,.22),transparent 30%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,92vw);margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(6,8,23,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 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