.marquee-banner{
    overflow:hidden;
    white-space:nowrap;
    height:40px; line-height:40px;
    background:#fff; color:#495057; font-size:14px; font-weight:500;
    padding:0; /* kein horizontales Padding am Container */
  }
  .marquee-banner .chunk{ display:inline-block; }
  .marquee-banner .sep{ display:inline-block; width:0; } /* Breite setzt JS */

@media only screen and (max-width: 979px) {
  .marquee-banner {
    height: 26px;
    line-height: 26px;
    font-size: 12px;
  }
}