/* Header dùng chung cho các trang nội dung NSVINA */
.siteHeader{position:sticky;top:0;z-index:1000;background:rgba(12,14,18,.97);border-bottom:1px solid rgba(255,190,45,.28);backdrop-filter:blur(10px)}
.siteHeaderInner{max-width:1200px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:24px}
.siteBrand{display:flex;align-items:center;flex:0 0 auto;text-decoration:none}
.siteBrand img{display:block;width:150px;max-height:48px;object-fit:contain}
.siteNav{margin-left:auto;display:flex;align-items:center;justify-content:flex-end;gap:6px;flex-wrap:wrap}
.siteNav a{color:#d9e2ef;text-decoration:none;font-weight:700;font-size:14px;line-height:1;padding:11px 12px;border-radius:8px;transition:.18s ease}
.siteNav a:hover,.siteNav a.active{color:#ffd04a;background:rgba(255,190,45,.10)}
@media (max-width:760px){.siteHeaderInner{align-items:flex-start;gap:10px;padding:8px 10px}.siteBrand img{width:105px;max-height:38px}.siteNav{gap:2px}.siteNav a{font-size:11px;padding:8px 7px}}
@media (max-width:520px){.siteHeaderInner{display:block}.siteBrand{justify-content:center;margin-bottom:6px}.siteNav{justify-content:center}.siteNav a{font-size:10.5px;padding:7px 6px}}