:root{--bg:#F5F7FA;--blue:#2F6BFF;--orange:#FF6A3D;--green:#22C55E;--red:#EF4444;--text:#111827;--muted:#6B7280;--card:#FFFFFF;--border:#E5E7EB;--shadow:0 12px 32px rgba(17,24,39,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#fff 0,#F5F7FA 360px,#F5F7FA 100%);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.62}a{color:inherit;text-decoration:none}.site-header{height:80px;display:flex;align-items:center;justify-content:space-between;gap:22px;padding:10px clamp(16px,4vw,58px);border-bottom:1px solid var(--border);background:rgba(255,255,255,.92);backdrop-filter:blur(14px);position:sticky;top:0;z-index:50;box-shadow:0 4px 20px rgba(17,24,39,.04)}.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:950;white-space:nowrap;color:var(--blue)}.brand img{height:50px;max-width:220px;width:auto;object-fit:contain}.site-header 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