响应式导航栏模板

HTML

<nav class="navbar">
  <div class="nav-container">
    <a href="/" class="nav-logo">
      <img src="logo.svg" alt="Logo" height="32">
    </a>

    <button class="nav-toggle" aria-label="切换菜单">
      <span></span>
      <span></span>
      <span></span>
    </button>

    <ul class="nav-menu">
      <li><a href="/" class="active">首页</a></li>
      <li class="dropdown">
        <a href="/services">服务 ▾</a>
        <ul class="dropdown-menu">
          <li><a href="/web-design">网页设计</a></li>
          <li><a href="/hosting">主机托管</a></li>
          <li><a href="/seo">SEO 优化</a></li>
        </ul>
      </li>
      <li><a href="/about">关于</a></li>
      <li><a href="/blog">博客</a></li>
      <li><a href="/contact" class="nav-cta">联系我们</a></li>
    </ul>
  </div>
</nav>

CSS

/* 基础样式 */
.navbar {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  text-decoration: none;
  color: #333;
  padding: 8px 16px;
  border-radius: 6px;
  transition: background .2s;
}

.nav-menu a:hover,
.nav-menu a.active {
  background: #f0f0f0;
  color: #4F46E5;
}

.nav-cta {
  background: #4F46E5;
  color: #fff !important;
}

.nav-cta:hover {
  background: #4338CA !important;
}

/* 下拉菜单 */
.dropdown { position: relative; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  border-radius: 8px;
  min-width: 180px;
  list-style: none;
  padding: 8px;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #333;
  transition: transform .3s;
}

/* 移动端 */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
  }

  .nav-menu.active { display: flex; }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    padding-left: 16px;
  }
}

JavaScript

document.addEventListener('DOMContentLoaded', () => {
  const toggle = document.querySelector('.nav-toggle');
  const menu = document.querySelector('.nav-menu');

  toggle.addEventListener('click', () => {
    menu.classList.toggle('active');
    toggle.setAttribute('aria-expanded',
      toggle.getAttribute('aria-expanded') === 'false' ? 'true' : 'false'
    );
  });

  // 点击菜单外关闭
  document.addEventListener('click', (e) => {
    if (!e.target.closest('.navbar')) {
      menu.classList.remove('active');
    }
  });
});

功能特性

• ✅ 粘性导航（Sticky Header）
• ✅ 移动端汉堡菜单
• ✅ 下拉菜单（子导航）
• ✅ 当前页面高亮（.active）
• ✅ 点击外部关闭菜单
• ✅ ARIA 无障碍标签
• ✅ CTA 按钮样式