:root{--background:#ffffff;--surface:#f5f5f7;--text:#1d1d1f;--muted:#6e6e73;--line:#e5e5e7;--accent:#0071e3}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--background);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}section{scroll-margin-top:90px}.site-header{height:78px;padding:0 6%;display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);position:-webkit-sticky;position:sticky;top:0;z-index:100;border-bottom:1px solid var(--line)}.brand,.footer-brand{font-size:23px;font-weight:800;letter-spacing:-1.5px}.brand{display:flex;align-items:center;flex-shrink:0}.site-header .brand-logo{display:block;width:105px;height:30px;object-fit:contain;object-position:left 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