#archive-banner{
  position: fixed; /* ← 포인트 */
  top: 0; left: 0; right: 0;
  z-index: 99999;
  background-color: #d9534f;
  color: #fff;
  text-align: center;
  padding: 10px;
  font-weight: 600;
  font-size: 15px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

/* 배너 높이만큼 페이지 전체 위쪽 여백 */
body { padding-top: var(--archive-banner-h, 0px); }