:root{--bg:#f7f9fc;--surface:#fff;--text:#172033;--muted:#667085;--line:#e5e9f0;--primary:#2563eb;--primary-dark:#1d4ed8;--soft:#eef4ff;--success:#15803d;--danger:#b42318;--shadow:0 10px 35px rgba(16,24,40,.08);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.container{width:min(1120px,calc(100% - 32px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:800;letter-spacing:-.04em;font-size:20px}.brand span{color:var(--primary)}.nav-links{display:flex;align-items:center;gap:4px}.nav-links a{padding:9px 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