:root{--ink:#0b1220;--slate:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f5f8ff;--card:#ffffff;--blue:#2563eb;--blue-strong:#1d4ed8;--blue-soft:#eaf1ff;--blue-100:#dbe7ff;--sky:#3b82f6;--teal:#0ea5a4;--p1:#f54927;--p2:#faa18f;--p-ok:#d2e6d0;--p-best:#7ec492;--bu-a:#3aa3d8;--bu-b:#5a6b78;--bu-c:#0ea5a4;--shadow:0 1px 2px rgba(15,23,42,.06), 0 12px 30px rgba(37,99,235,.08);--shadow-lg:0 24px 60px rgba(15,23,42,.14);--radius:18px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:radial-gradient(1100px 520px at 12% -10%,#e8f0ff,#e8f0ff00 60%),radial-gradient(900px 500px at 100% 0%,#eef5ff,#eef5ff00 55%),var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}a{color:inherit;text-decoration:none}.wrap{max-width:1180px;margin:0 auto;padding:0 24px}header.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(160%) 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