3D设计标题

<header class="bg-white shadow-lg dark:bg-gray-800">
  <div class="container mx-auto px-6 py-4">
    <div class="flex items-center justify-between">
      <div class="text-xl font-semibold text-gray-700 dark:text-white">3D Header</div>
      <div class="hidden md:block">
        <nav>
          <a href="#" class="text-gray-600 hover:text-gray-800 dark:text-gray-300 dark:hover:text-white px-4">Home</a>
          <a href="#" class="text-gray-600 hover:text-gray-800 dark:text-gray-300 dark:hover:text-white px-4">About</a>
          <a href="#" class="text-gray-600 hover:text-gray-800 dark:text-gray-300 dark:hover:text-white px-4">Contact</a>
        </nav>
      </div>
    </div>
  </div>
</header>