const title = document.getElementById("title");
const description = document.getElementById("description");
const badge = document.getElementById("badge");

title.textContent = "今天已完成 DOM 练习";
description.textContent = "已经练习了元素选择、文本修改和样式切换。";
description.style.color = "#2563eb";
badge.textContent = "已完成";
badge.classList.add("done");