.banner-slide-container-mobile { display: none; } @media (max-width: 768px) { .banner-slide-container-mobile { display: block; } } document.addEventListener('DOMContentLoaded', function() { let index = 0; const banners = document.querySelectorAll('.banner-slide-container-mobile .banner-slide-item-mobile'); const total = banners.length; if (total { banner.style.display = (idx === i) ? 'block' : 'none'; }); } setInterval(() => { index = (index + 1) % total; showBanner(index); }, 4000); showBanner(index); });