.container{max-width:1120px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:rgba(11,18,32,.7);backdrop-filter:saturate(180%) blur(10px);z-index:10;border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:48px;width:auto;border-radius:4px;cursor:pointer;}
.lang{display:flex;align-items:center;gap:8px}
.lang button{background:transparent;border:1px solid var(--border);color:var(--muted);padding:6px 10px;border-radius:10px;cursor:pointer}
.lang button.active{color:var(--text);border-color:var(--primary)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 16px;border-radius:12px;border:1px solid var(--border);background:linear-gradient(180deg, #1b253a, #111827);color:var(--text);font-weight:600;box-shadow:var(--shadow)}
.btn.primary{background:linear-gradient(180deg, #2563eb, #1d4ed8)}
.btn.ghost{background:transparent}