:root{--brand:#4f46e5;--brand-dark:#4338ca;--brand-light:#eef2ff;--grad:linear-gradient(135deg,#6366f1,#8b5cf6);--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#fff;--bg-soft:#f8fafc;--bg-dark:#0b1020;--radius:16px;--shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.08);--shadow-md:0 4px 6px rgba(15,23,42,.05),0 10px 30px rgba(15,23,42,.08);--shadow-lg:0 20px 50px rgba(79,70,229,.2);--maxw:1160px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}img,svg{display:block;max-width:100%}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}section{padding:84px 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