:root{--ink: #1d1d1f;--muted: #6e6e73;--bg: #f5f5f7;--card: #ffffff;--line: #e8e8ed;--blue: #0071e3;--green: #1e7a3c;--radius: 20px;--shadow: 0 1px 3px rgba(0,0,0,.06);--shadow-lift: 0 8px 24px rgba(0,0,0,.08);--ease: cubic-bezier(.22, 1, .36, 1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.page{max-width:1024px;margin:0 auto;padding:0 24px 64px;animation:fadeUp .5s var(--ease) both}.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:24px;margin:0 -24px;padding:12px 24px;background:#f5f5f7d9;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid 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