/* 基础重置 */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  /* Body 样式 */
  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #FF7F50, #FF4500);
    color: #333;
    line-height: 1.6;
    padding: 20px;
    animation: aurora-move 15s linear infinite;
    background-size: 400% 400%;
  }

  /* 头部样式 */
  header {
    text-align: center;
    padding: 30px 0;
  }

  header h1 {
    font-size: 3em;
    color: white;
    margin-bottom: 10px;
  }

  header p {
    font-size: 1.5em;
    color: #fff3e0;
  }

  /* 通知栏样式 */
  .notification {
    text-align: center;
    padding: 15px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    margin: 20px auto;
    max-width: 800px;
    font-size: 1.2em;
    color: #555;
  }

  /* 主内容容器 */
  main {
    max-width: 1200px;
    margin: 0 auto;
  }

  /* 卡片容器样式 */
  .card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
  }

  /* 单个卡片样式 */
  .card {
    background: linear-gradient(to bottom, #FF7F50, #FF4500);
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    width: 300px;
    padding: 20px;
    color: white;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .card:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
  }

  .card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 15px;
  }

  .card h3 {
    font-size: 1.5em;
    margin-bottom: 10px;
  }

  .card p {
    font-size: 1em;
    margin-bottom: 8px;
  }

  .card strong {
    display: block;
    margin-bottom: 5px;
    color: #ffe4b5;
  }

  /* 示例文章样式 */
  .sample-article {
    background: rgba(255, 255, 255, 0.85);
    padding: 30px;
    border-radius: 10px;
    margin-top: 40px;
  }

  .sample-article h2 {
    font-size: 2.5em;
    margin-bottom: 15px;
    color: #FF7F50;
  }

  .sample-article h3 {
    font-size: 2em;
    margin-top: 25px;
    color: #FF4500;
  }

  .sample-article h4 {
    font-size: 1.5em;
    margin-top: 20px;
    color: #FFA07A;
  }

  .sample-article ul {
    list-style: disc inside;
    margin-bottom: 20px;
    padding-left: 20px;
  }

  .sample-article li {
    margin-bottom: 10px;
  }

  .sample-article code {
    background: #f4f4f4;
    padding: 2px 4px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    color: #d6336c;
  }

  .sample-article pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  .sample-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
  }

  .sample-article th, .sample-article td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
  }

  .sample-article th {
    background-color: #FF7F50;
    color: white;
  }

  /* 链接样式 */
  a {
    color: #FFD700;
    text-decoration: none;
  }

  a:hover {
    text-decoration: underline;
  }

  /* 动画关键帧 */
  @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) {
    .card {
      width: 28%;
    }
  }

  @media (max-width: 1200px) {
    .card {
      width: 30%;
    }
  }

  @media (max-width: 1024px) {
    .card {
      width: 45%;
    }
  }

  @media (max-width: 768px) {
    .card {
      width: 45%;
    }
  }

  @media (max-width: 480px) {
    .card {
      width: 90%;
    }
  }

  @media (max-width: 320px) {
    .card {
      width: 100%;
    }
  }