:root{--bg:#0b0f17;--bg2:#111827;--card:#151d2b;--card2:#1a2334;--line:#24304a;--text:#e6ecf5;--muted:#93a2bd;--dim:#6b7a96;--gold:#f5b83d;--berkeley:#fdb515;--blue:#5ea3ff;--purple:#a78bfa;--green:#34d399;--red:#f87171;--pink:#f472b6;--teal:#2dd4bf}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:radial-gradient(1200px 600px at 80% -10%,#1b2a4a 0%,transparent 60%),radial-gradient(900px 500px at 10% 0%,#221a3a 0%,transparent 55%),var(--bg);color:var(--text);line-height:1.6}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:1120px;margin:0 auto;padding:0 22px}header.nav{position:sticky;top:0;z-index:50;background:#0b0f17d9;backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;gap:18px;padding:12px 22px;max-width:1120px;margin:0 auto}.nav 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