.site-header{
  position:sticky; top:0; z-index:50;
  background: rgba(11,15,25,.7);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}

.header-inner{
  height:56px;
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
}

.site-main{ padding:22px 0 44px; }

.site-footer{
  border-top:1px solid var(--line);
  padding:18px 0;
  color:var(--muted);
}