150 lines
4.6 KiB
JavaScript
150 lines
4.6 KiB
JavaScript
// ========================================
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// 导航栏滚动效果
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// ========================================
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const navbar = document.getElementById('navbar');
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let lastScroll = 0;
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window.addEventListener('scroll', () => {
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const currentScroll = window.pageYOffset;
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// 添加滚动时的阴影效果
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if (currentScroll > 50) {
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navbar.style.boxShadow = '0 4px 20px rgba(0, 0, 0, 0.1)';
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} else {
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navbar.style.boxShadow = '0 2px 10px rgba(0, 0, 0, 0.05)';
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}
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lastScroll = currentScroll;
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});
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// ========================================
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// 移动端汉堡菜单
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// ========================================
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const hamburger = document.getElementById('hamburger');
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const navMenu = document.getElementById('navMenu');
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const navLinks = document.querySelectorAll('.nav-link');
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hamburger.addEventListener('click', () => {
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hamburger.classList.toggle('active');
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navMenu.classList.toggle('active');
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});
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// 点击导航链接后关闭菜单
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navLinks.forEach(link => {
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link.addEventListener('click', () => {
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hamburger.classList.remove('active');
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navMenu.classList.remove('active');
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});
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});
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// ========================================
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// 平滑滚动到锚点
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// ========================================
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document.querySelectorAll('a[href^="#"]').forEach(anchor => {
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anchor.addEventListener('click', function (e) {
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e.preventDefault();
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const target = document.querySelector(this.getAttribute('href'));
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if (target) {
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const offsetTop = target.offsetTop - 80; // 减去导航栏高度
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window.scrollTo({
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top: offsetTop,
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behavior: 'smooth'
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});
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}
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});
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});
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// ========================================
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// 滚动时导航链接高亮
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// ========================================
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const sections = document.querySelectorAll('section[id]');
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function highlightNavigation() {
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const scrollY = window.pageYOffset;
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sections.forEach(section => {
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const sectionHeight = section.offsetHeight;
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const sectionTop = section.offsetTop - 100;
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const sectionId = section.getAttribute('id');
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const navLink = document.querySelector(`.nav-link[href="#${sectionId}"]`);
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if (navLink) {
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if (scrollY > sectionTop && scrollY <= sectionTop + sectionHeight) {
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navLink.classList.add('active');
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} else {
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navLink.classList.remove('active');
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}
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}
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});
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}
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window.addEventListener('scroll', highlightNavigation);
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// ========================================
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// 卡片进入视口时的动画效果
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// ========================================
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const observerOptions = {
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threshold: 0.1,
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rootMargin: '0px 0px -50px 0px'
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};
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const observer = new IntersectionObserver((entries) => {
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entries.forEach(entry => {
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if (entry.isIntersecting) {
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entry.target.style.opacity = '1';
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entry.target.style.transform = 'translateY(0)';
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}
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});
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}, observerOptions);
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// 观察所有卡片元素
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document.querySelectorAll('.card').forEach(card => {
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card.style.opacity = '0';
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card.style.transform = 'translateY(30px)';
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card.style.transition = 'opacity 0.6s ease-out, transform 0.6s ease-out';
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observer.observe(card);
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});
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// ========================================
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// 页面加载完成后的初始化
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// ========================================
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window.addEventListener('load', () => {
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// 添加页面加载完成的类，用于触发初始动画
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document.body.classList.add('loaded');
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// 立即执行一次高亮检查
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highlightNavigation();
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});
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// ========================================
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// 图片懒加载（可选优化）
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// ========================================
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if ('IntersectionObserver' in window) {
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const imageObserver = new IntersectionObserver((entries, observer) => {
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entries.forEach(entry => {
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if (entry.isIntersecting) {
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const img = entry.target;
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if (img.dataset.src) {
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img.src = img.dataset.src;
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img.removeAttribute('data-src');
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observer.unobserve(img);
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}
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}
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});
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});
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// 可以将来为实际图片添加 data-src 属性实现懒加载
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}
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// ========================================
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// 响应式处理 - 窗口大小改变时重置菜单
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// ========================================
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window.addEventListener('resize', () => {
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if (window.innerWidth > 768) {
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hamburger.classList.remove('active');
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navMenu.classList.remove('active');
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}
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});
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