.site-nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background 0.4s ease,box-shadow 0.4s ease,padding 0.3s ease}.site-nav__topbar{background:var(--navy-dark);padding:0.4rem clamp(1.5rem,5vw,4rem);display:flex;justify-content:flex-end;align-items:center;gap:2rem;font-size:0.75rem;color:rgba(255,255,255,0.55);font-family:var(--font-alt);letter-spacing:0.04em;transition:height 0.3s ease,opacity 0.3s ease}.site-nav__topbar a{color:rgba(255,255,255,0.55);transition:color 0.2s}.site-nav__topbar a:hover{color:var(--yellow)}.site-nav__topbar-item{display:flex;align-items:center;gap:0.4rem}.site-nav__topbar-item svg{width:12px;height:12px}.site-nav__main{background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:0 clamp(1.5rem,5vw,4rem);display:flex;align-items:center;justify-content:space-between;height:68px;border-bottom:1px solid var(--gray-200);transition:height 0.3s ease,box-shadow 0.3s ease}.site-nav.scrolled .site-nav__main{height:56px;box-shadow:0 4px 24px rgba(26,58,107,0.1)}.site-nav.scrolled .site-nav__topbar{height:0;opacity:0;overflow:hidden;padding:0}.nav-logo{display:flex;align-items:center}.nav-logo img{height:52px;width:auto;min-width:220px;max-width:280px;object-fit:contain;object-position:left center;transition:height 0.3s,min-width 0.3s}.site-nav.scrolled .nav-logo img{height:44px;min-width:180px;max-width:240px}.nav-links{display:flex;align-items:center;gap:0}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:0.3rem;padding:0 1.1rem;height:68px;font-family:var(--font-alt);font-size:0.82rem;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;color:var(--gray-800);transition:color var(--transition);white-space:nowrap}.site-nav.scrolled .nav-link{height:56px}.nav-link::after{content:'';position:absolute;bottom:0;left:1.1rem;right:1.1rem;height:3px;background:var(--yellow);transform:scaleX(0);transition:transform 0.3s ease}.nav-link:hover,.nav-link.active{color:var(--navy)}.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}.nav-link svg{width:12px;height:12px;transition:transform 0.2s}.nav-item:hover .nav-link svg{transform:rotate(180deg)}.nav-dropdown{position:absolute;top:100%;left:0;min-width:260px;background:var(--white);box-shadow:0 16px 48px rgba(26,58,107,0.15);border-top:3px solid var(--yellow);border-radius:0 0 var(--radius-lg) var(--radius-lg);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity 0.25s ease,transform 0.25s ease,visibility 0.25s;z-index:100}.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown__section{padding:1rem 0}.nav-dropdown__title{padding:0.4rem 1.4rem;font-size:0.65rem;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;color:var(--yellow-dk);font-family:var(--font-alt)}.nav-dropdown a{display:flex;align-items:center;gap:0.6rem;padding:0.6rem 1.4rem;font-family:var(--font-alt);font-size:0.82rem;font-weight:500;color:var(--gray-600);transition:background 0.2s,color 0.2s,padding-left 0.2s}.nav-dropdown a::before{content:'';display:block;width:4px;height:4px;background:var(--yellow);border-radius:50%;flex-shrink:0;opacity:0;transition:opacity 0.2s}.nav-dropdown a:hover{background:var(--gray-100);color:var(--navy);padding-left:1.8rem}.nav-dropdown a:hover::before{opacity:1}.nav-dropdown__divider{height:1px;background:var(--gray-200);margin:0.5rem 0}.nav-cta{margin-left:1.5rem;padding:0.65rem 1.4rem;background:var(--navy);color:var(--white)!important;font-family:var(--font-alt);font-size:0.78rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;border-radius:var(--radius);transition:background var(--transition),transform var(--transition);white-space:nowrap}.nav-cta:hover{background:var(--yellow);color:var(--navy-dark)!important;transform:translateY(-1px)}.nav-cta::after{display:none!important}.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}.nav-toggle span{display:block;width:24px;height:2px;background:var(--navy);transition:var(--transition)}.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle.open span:nth-child(2){opacity:0}.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}@media (max-width:1100px){.nav-links{display:none}.nav-toggle{display:flex}.nav-links.open{display:flex;flex-direction:column;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--navy-dark);padding:5rem 2rem 2rem;overflow-y:auto;z-index:999;gap:0}.nav-links.open .nav-item{width:100%}.nav-links.open .nav-link{color:var(--white);height:auto;padding:1rem 0;font-size:1.2rem;border-bottom:1px solid rgba(255,255,255,0.08)}.nav-links.open .nav-link::after{display:none}.nav-links.open .nav-dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:rgba(255,255,255,0.05);border-top:none;border-radius:0;border-left:3px solid var(--yellow);margin:0.5rem 0 0.5rem 1rem}.nav-links.open .nav-dropdown a{color:rgba(255,255,255,0.7)}.nav-links.open .nav-dropdown a:hover{color:var(--yellow);background:transparent}.nav-links.open .nav-cta{margin:1.5rem 0 0;text-align:center;display:block;padding:1rem}.site-nav__topbar{display:none}}@media (max-width:480px){.site-nav__main{padding:0 1rem;height:58px}.nav-logo img{height:38px;min-width:160px;max-width:200px}.nav-toggle{padding:6px}.nav-links.open{padding:4.5rem 1.25rem 2rem}.nav-links.open .nav-link{font-size:1rem;padding:0.85rem 0}.nav-links.open .nav-cta{padding:0.85rem;font-size:0.82rem}}.nav-link--patent{color:var(--yellow)!important;font-weight:700!important}.nav-link--patent:hover{color:var(--yellow-lt)!important}.nav-link--patent.active{color:var(--yellow)!important}.nav-link--patent::after{background:var(--yellow)!important}