:root{--blue:#0058A3;--yellow:#FFDA1A;--bg:#ffffff;--ink:#111827;--muted:#6B7280;--surface:#F3F4F6;--radius:18px;--shadow:0 10px 20px rgba(0,0,0,.06)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Roboto,Noto Sans Thai,system-ui,-apple-system,Segoe UI,Arial,Helvetica Neue,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}img{max-width:100%;display:block}a{color:var(--blue);text-decoration:none}.container{width:min(1100px,92%);margin-inline:auto}.header{position:sticky;top:0;z-index:30;background:#fff;backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid #e5e7eb;transition:transform .3s ease}.header.hide{transform:translateY(-100%)}.header .wrap{display:flex;align-items:center;justify-content:space-between;padding:12px 0}.brand{display:flex;align-items:center;gap:12px}.brand img{height:40px}.brand .name{font-weight:800;letter-spacing:.2px}nav ul{display:flex;list-style:none;gap:22px;margin:0;padding:0}nav 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