CAPTCHA 组件

<div class="flex items-center justify-center min-h-screen p-4 bg-gray-100 dark:bg-gray-900 font-sans tracking-wide">
  <div class="w-full max-w-md bg-white dark:bg-gray-800 rounded-lg shadow-xl overflow-hidden transform transition-all duration-300 ease-in-out hover:shadow-2xl sm:p-5 p-4">
    <div class="flex items-center justify-between mb-6">
      <h2 class="text-2xl font-bold text-gray-800 dark:text-white capitalize">I'm not a robot</h2>
      <svg class="h-8 w-8 text-indigo-600 dark:text-indigo-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
      </svg>
    </div>

    <div class="grid grid-cols-3 gap-3 mb-6">
      <img src="https://picsum.photos/id/237/100/100" alt="Image Grid 1" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/238/100/100" alt="Image Grid 2" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/239/100/100" alt="Image Grid 3" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/240/100/100" alt="Image Grid 4" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/241/100/100" alt="Image Grid 5" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/242/100/100" alt="Image Grid 6" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/243/100/100" alt="Image Grid 7" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/244/100/100" alt="Image Grid 8" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
      <img src="https://picsum.photos/id/245/100/100" alt="Image Grid 9" class="w-full h-auto aspect-square object-cover rounded-md border-2 border-transparent hover:border-indigo-500 dark:hover:border-indigo-400 cursor-pointer transition-all duration-200 ease-in-out">
    </div>

    <p class="mb-6 text-gray-600 dark:text-gray-300 text-sm md:text-base">Please select all squares with <span class="font-semibold text-indigo-700 dark:text-indigo-400">vehicles</span>.</p>

    <div class="flex justify-end">
      <button class="px-6 py-2 bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white font-semibold rounded-full shadow-md hover:shadow-lg transition-all duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:ring-opacity-75">
        Verify
      </button>
    </div>

    <div class="flex items-center justify-between text-xs mt-6 text-gray-500 dark:text-gray-400">
      <a href="#" class="underline hover:text-indigo-600 dark:hover:text-indigo-400 transition">Privacy</a>
      <a href="#" class="underline hover:text-indigo-600 dark:hover:text-indigo-400 transition">Terms</a>
    </div>
  </div>
</div>