.site-header{position:sticky;top:0;z-index:50;height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 6vw;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(0,0,0,.06)}.brand{display:flex;align-items:center;gap:12px;font-weight:900;font-size:20px}.brand-mark{width:44px;height:44px;display:grid;place-items:center;background:var(--orange);color:white;border-radius:50%;box-shadow:0 12px 30px rgba(249,115,22,.35)}.nav{display:flex;align-items:center;gap:26px;font-weight:800}.nav a{color:#333}.nav a.active,.nav a:hover{color:var(--orange)}.mobile-menu-btn{display:none;background:#111;color:white;border:0;border-radius:12px;padding:10px 13px;font-size:20px}@media(max-width:900px){.nav{display:none;position:absolute;top:78px;left:0;width:100%;background:white;padding:18px 6vw;flex-direction:column;align-items:flex-start;border-bottom:1px solid #eee}.nav.open{display:flex}.mobile-menu-btn{display:block}}@media(max-width:580px){.site-header{height:70px;padding:0 18px}.brand span:last-child{font-size:16px}}