Minimalist Captcha 组件

<div class="flex items-center justify-center min-h-screen bg-gray-100 dark:bg-gray-900 p-4">
  <div class="w-full max-w-sm rounded-lg shadow-md bg-white dark:bg-gray-800 p-6 sm:p-8 border border-gray-200 dark:border-gray-700">
    <h2 class="text-2xl font-semibold text-center text-gray-800 dark:text-gray-100 mb-6">
      Are you human?
    </h2>

    <div class="flex flex-col items-center gap-4 mb-6">
      <div class="w-full h-20 bg-gray-200 dark:bg-gray-700 rounded-md overflow-hidden flex items-center justify-center p-2">
        <img src="https://picsum.photos/250/80?random=1" alt="Captcha image" class="w-full h-full object-cover rounded-sm border border-gray-300 dark:border-gray-600">
      </div>
      <button type="button" class="flex items-center text-sm font-medium text-gray-600 dark:text-gray-300 hover:text-gray-800 dark:hover:text-gray-100 focus:outline-none focus:ring-2 focus:ring-gray-500 focus:ring-offset-2 dark:focus:ring-offset-gray-800 rounded-md py-1 px-2">
        <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004 11m7 11v-5h.582m-15.356-2A8.001 8.001 0 0120 13l-2.199-1.857L20 13c-.161 4.545-3.535 8-7.794 8A7.962 7.962 0 014 12.01