拟构标头组件

<header class="bg-white dark:bg-gray-800 shadow-lg border-b border-gray-300 dark:border-gray-700 p-4">
    <div class="container mx-auto flex justify-between items-center">
        <div class="flex items-center space-x-4">
            <img src="https://picsum.photos/50/50" alt="Logo" class="rounded-full shadow-md">
            <h1 class="text-2xl font-bold text-gray-900 dark:text-white">ShopName</h1>
        </div>
        <nav class="flex space-x-4">
            <a href="#" class="text-gray-600 dark:text-gray-300 hover:text-gray-800 dark:hover:text-gray-200">Home</a>
            <a href="#" class="text-gray-600 dark:text-gray-300 hover:text-gray-800 dark:hover:text-gray-200">Products</a>
            <a href="#" class="text-gray-600 dark:text-gray-300 hover:text-gray-800 dark:hover:text-gray-200">About Us</a>
            <a href="#" class="text-gray-600 dark:text-gray-300 hover:text-gray-800 dark:hover:text-gray-200">Contact</a>
        </nav>
        <div class="relative">
            <img src="https://randomuser.me/api/portraits/men/1.jpg" alt="User Avatar" class="w-8 h-8 rounded-full shadow-md">
            <span class="absolute top-0 right-0 bg-red-500 rounded-full h-2 w-2 border-2 border-white dark:border-gray-800"></span>
        </div>
    </div>
</header>