let currentPage = 1;
showPage(currentPage);

function showPage(page) {
    const pages = document.querySelectorAll('.page');
    pages.forEach(p => p.classList.remove('active')); // 隐藏所有页面
    document.getElementById(`page${page}`).classList.add('active'); // 显示当前页面
}

function nextPage(page) {
    currentPage = page;
    showPage(currentPage);
}

function prevPage(page) {
    currentPage = page;
    showPage(currentPage);
}