document.addEventListener("click", async (event) => {
  const button = event.target.closest("[data-copy]");
  if (!button) return;
  const value = button.getAttribute("data-copy") || "";
  try {
    await navigator.clipboard.writeText(value);
    const original = button.textContent;
    button.textContent = "已复制";
    setTimeout(() => {
      button.textContent = original;
    }, 1200);
  } catch {
    window.prompt("复制下面的内容", value);
  }
});