页脚组件

<footer class="bg-gray-200 dark:bg-gray-900 text-gray-800 dark:text-gray-200 p-8">
  <div class="container mx-auto grid grid-cols-1 md:grid-cols-3 gap-8">
    <div class="mb-6 md:mb-0">
      <h3 class="text-xl font-bold mb-4 text-purple-700 dark:text-purple-400">About Us</h3>
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      <h3 class="text-xl font-bold mb-4 text-green-700 dark:text-green-400">Categories</h3>
      <ul class="text-sm space-y-2">
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      <h3 class="text-xl font-bold mb-4 text-orange-700 dark:text-orange-400">Follow Us</h3>
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