:root{--bg:#f5f8fc;--card:#fff;--text:#0f172a;--muted:#667085;--line:#dce5f0;--blue:#1769ff;--blue2:#0f55d8;--navy:#0b1930;--shadow:0 18px 45px rgba(15,23,42,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#f8fbff 0,#f4f7fb 100%);font-family:Inter,system-ui,sans-serif;color:var(--text)}a{text-decoration:none;color:inherit}.topbar{height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 max(4vw,28px);background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid #e5ebf3;position:sticky;top:0;z-index:30}.brand{display:flex;align-items:center;gap:11px}.brandmark{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:var(--blue);color:#fff;font-size:22px;box-shadow:0 8px 18px rgba(23,105,255,.25)}.brand strong{display:block;font-size:16px}.brand span{display:block;font-size:11px;color:var(--muted);margin-top:2px}.topbar 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