/* 基础样式重置 */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  /* 页面背景设置 */
  body {
    font-family: 'Poppins', sans-serif;
    background: radial-gradient(circle, rgba(0, 8, 139, 0.9), transparent);
    color: #FFFFFF;
    line-height: 1.6;
    padding: 20px;
  }

  /* 标题样式 */
  h1, h2, h3, h4 {
    font-family: 'Roboto Mono', monospace;
    color: #FFFFFF;
    margin-bottom: 20px;
  }

  h1 {
    font-size: 2.5rem;
    text-align: center;
    margin-top: 20px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
  }

  h2 {
    font-size: 2rem;
    margin-top: 40px;
    border-bottom: 2px solid #9400D3;
    padding-bottom: 10px;
  }

  h3 {
    font-size: 1.75rem;
    margin-top: 30px;
    color: #4B0082;
  }

  h4 {
    font-size: 1.5rem;
    margin-top: 25px;
    color: #00CED1;
  }

  /* 段落样式 */
  p {
    margin-bottom: 20px;
    text-indent: 2em;
  }

  /* 列表样式 */
  ul, ol {
    margin-bottom: 20px;
    padding-left: 40px;
  }

  li {
    margin-bottom: 10px;
  }

  /* 代码块样式 */
  pre {
    background: #2F4F4F;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  code {
    font-family: 'Courier New', Courier, monospace;
    color: #FFD700;
    font-size: 1rem;
  }

  /* 按钮样式 */
  .button {
    background-color: #4B0082;
    color: #FFFFFF;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-decoration: none;
    display: inline-block;
    margin-right: 10px;
  }

  .button:hover {
    background-color: #9400D3;
  }

  /* 卡片容器 */
  .card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 40px;
  }

  /* 单个卡片样式 */
  .card {
    background: rgba(75, 0, 130, 0.8);
    border: 1px solid #4B0082;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeIn 1s ease-in-out;
  }

  .card:hover {
    transform: scale(1.05) rotate(1deg);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
  }

  /* 卡片标题 */
  .card-title {
    font-family: 'Roboto Mono', monospace;
    font-size: 1.25rem;
    margin-bottom: 10px;
    color: #FFD700;
  }

  /* 卡片描述 */
  .card-description {
    font-size: 1rem;
    margin-bottom: 15px;
    color: #FFFFFF;
  }

  /* 背景元素 */
  .background-decor {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center;
    background-size: cover;
    opacity: 0.1;
    z-index: -1;
    animation: aurora-move 15s linear infinite;
  }

  /* 关键帧动画 */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  /* 响应式设计 */
  @media (max-width: 1440px) {
    h1 {
      font-size: 2.2rem;
    }
    h2 {
      font-size: 1.8rem;
    }
    h3 {
      font-size: 1.6rem;
    }
    h4 {
      font-size: 1.3rem;
    }
  }

  @media (max-width: 1200px) {
    .card-container {
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
  }

  @media (max-width: 1024px) {
    h1 {
      font-size: 2rem;
    }
    .card-container {
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 1.8rem;
    }
    h2 {
      font-size: 1.6rem;
    }
    .card-container {
      grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
  }

  @media (max-width: 480px) {
    h1 {
      font-size: 1.5rem;
    }
    h2 {
      font-size: 1.4rem;
    }
    .card-container {
      grid-template-columns: 1fr;
    }
    .button {
      padding: 8px 16px;
      font-size: 0.9rem;
    }
  }

  @media (max-width: 320px) {
    h1 {
      font-size: 1.3rem;
    }
    h2 {
      font-size: 1.2rem;
    }
    .card-description {
      font-size: 0.9rem;
    }
  }