.bja-site-header{--bja-blue-950:#041a46;--bja-blue-800:#073f95;--bja-cyan-500:#12a9ba;position:relative;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:clamp(1.1rem,2.2vw,2.4rem);height:7.2rem;min-height:0;padding:1rem clamp(1.25rem,4.7vw,4.8rem);background:hsla(0,0%,100%,.94);border-bottom:1px solid rgba(7,45,91,.07);box-shadow:0 10px 28px rgba(20,72,112,.055);backdrop-filter:blur(18px);font-family:var(--font-sans,system-ui,-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif)}.bja-brand{display:inline-flex;align-items:center;gap:.9rem;min-width:fit-content;text-decoration:none;color:inherit}.bja-brand-logo{display:block;width:clamp(5.5rem,7.4vw,7rem);height:auto}.bja-brand-logo img{width:100%;height:auto;object-fit:contain;filter:drop-shadow(0 8px 14px rgba(5,30,76,.12))}.bja-brand-copy{display:grid;gap:.1rem}.bja-brand-name{color:var(--bja-blue-950);font-size:clamp(1.55rem,2.25vw,2.2rem);font-weight:900;line-height:1.05}.bja-brand-name,.bja-brand-tagline{letter-spacing:.08em;white-space:nowrap}.bja-brand-tagline{color:#38577f;font-size:.74rem;font-weight:700}.bja-main-nav{display:flex;align-items:center;justify-content:center;gap:clamp(1rem,2.1vw,2.45rem);flex:1;color:var(--bja-blue-950);font-size:clamp(.92rem,1.06vw,1.08rem);font-weight:800}.bja-main-nav a{position:relative;padding:.35rem 0;white-space:nowrap;text-decoration:none;color:inherit}.bja-main-nav a:after{position:absolute;right:0;bottom:0;left:0;height:2px;background:linear-gradient(90deg,var(--bja-cyan-500),var(--bja-blue-800));transform:scaleX(0);transform-origin:center;transition:transform .18s ease;content:""}.bja-main-nav a:focus-visible:after,.bja-main-nav a:hover:after{transform:scaleX(1)}.bja-header-cta{display:inline-flex;align-items:center;justify-content:center;gap:.95rem;min-height:3.3rem;min-width:10.8rem;padding:.75rem 1.35rem;border-radius:.78rem;font-weight:900;letter-spacing:.02em;color:#fff;background:linear-gradient(135deg,#0049a8,#052766);box-shadow:0 12px 24px rgba(1,58,147,.22);text-decoration:none;transition:transform .18s ease,box-shadow .18s ease}.bja-header-cta:focus-visible,.bja-header-cta:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(1,58,147,.28)}@media (max-width:768px){.bja-site-header{flex-wrap:wrap;height:auto;padding:.8rem 1rem;gap:.6rem}.bja-main-nav{width:100%;overflow-x:auto;flex-wrap:nowrap;justify-content:flex-start;-webkit-overflow-scrolling:touch;padding:.4rem 0}.bja-header-cta{min-width:auto;padding:.55rem 1rem;min-height:2.6rem}}