// default 模板脚本：Banner 简单轮播
(function () {
  var items = document.querySelectorAll('.yz-banner-item');
  if (items.length === 0) return;
  var idx = 0;
  items[0].classList.add('active');
  if (items.length === 1) return;
  setInterval(function () {
    items[idx].classList.remove('active');
    idx = (idx + 1) % items.length;
    items[idx].classList.add('active');
  }, 4000);
})();