响应式导航栏实现方法详解

<nav class="navbar">
  <div class="logo">Logo</div>
  <ul class="nav-links">
    <li><a href="#">首页</a></li>
    <li><a href="#">关于</a></li>
    <li><a href="#">服务</a></li>
    <li><a href="#">联系</a></li>
  </ul>
</nav>

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #333;
  padding: 1rem;
}

.logo {
  color: white;
  font-size: 1.5rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: white;
  text-decoration: none;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    text-align: center;
  }

  .nav-links {
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
  }

  .logo {
    margin-bottom: 0.5rem;
  }
}

<button class="menu-btn">☰</button>

.menu-btn {
  display: none;
}

@media (max-width: 768px) {
  .menu-btn {
    display: block;
    background: none;
    border: 1px solid white;
    color: white;
    padding: 0.5rem 1rem;
    cursor: pointer;
  }
}