假设点击.bkt或者.brand均可以让页面滚动到顶部

const bkt = () => {
  let bktElements = document.querySelectorAll(".bkt,.brand");
  for (const bktEL of bktElements) {
    bktEL.addEventListener("click", (e) => {
      e.preventDefault();
      window.scrollTo({
        top: 0,
        behavior: "smooth",
      });
      return false;
    });
  }
};
window.addEventListener("DOMContentLoaded", bkt);