:root{--bg:#fffaf2;--ink:#1f2933;--muted:#5f6c7b;--line:#e7dccb;--panel:#ffffff;--mint:#8bd7c1;--coral:#ff8d7a;--blue:#75a7ff;--sun:#ffd36b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.6}a{color:inherit}.site-shell{min-height:100vh}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:rgba(255,250,242,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.nav{display:flex;justify-content:space-between;width:min(1120px,calc(100% - 32px));margin:0 auto;padding:12px 0;gap:24px}.brand,.nav{align-items:center}.brand{display:inline-flex;gap:10px;font-size:18px;font-weight:800;text-decoration:none}.brand-logo{width:58px;height:40px;object-fit:contain}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:2px solid 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