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

  /* 颜色变量定义 */
  :root {
    --primary-color: #0A66C2;
    --secondary-color: #F5F5F5;
    --accent-color: #FFD700;
    --text-color: #333333;
    --background-gradient: radial-gradient(circle, rgba(10, 102, 194, 0.8), transparent);
    --font-body: 'Roboto', sans-serif;
    --font-heading: 'Poppins', sans-serif;
  }

  /* 全局样式 */
  body {
    font-family: var(--font-body);
    background-color: var(--secondary-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
  }

  /* 顶部导航栏 */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--secondary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }

  .navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 15px 0;
  }

  .navbar ul li {
    margin: 0 20px;
  }

  .navbar ul li a {
    text-decoration: none;
    color: var(--primary-color);
    font-family: var(--font-heading);
    font-size: 16px;
    transition: color 0.3s;
  }

  .navbar ul li a:hover {
    color: var(--accent-color);
  }

  /* 主要内容区域 */
  .container {
    max-width: 1200px;
    margin: 100px auto 50px;
    padding: 20px;
  }

  /* 文章样式 */
  article {
    background: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin-bottom: 40px;
  }

  article h2, article h3, article h4 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    margin-bottom: 20px;
  }

  article h2 {
    font-size: 28px;
  }

  article h3 {
    font-size: 24px;
  }

  article h4 {
    font-size: 20px;
  }

  article p {
    margin-bottom: 15px;
    font-size: 16px;
  }

  article pre {
    background: #f0f0f0;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 15px;
  }

  article code {
    font-family: 'Courier New', Courier, monospace;
    color: #d63384;
  }

  /* 示例展示 */
  .example-section {
    background: var(--secondary-color);
    padding: 40px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin-bottom: 40px;
  }

  .example-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 26px;
  }

  .example-section p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 20px;
  }

  /* 卡片布局 */
  .cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }

  .card {
    background: var(--secondary-color);
    width: 300px;
    border-radius: 15px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.2);
  }

  .card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }

  .card-content {
    padding: 20px;
  }

  .card-title {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
  }

  .card-description {
    font-size: 16px;
    color: #555555;
  }

  /* 按钮样式 */
  .btn {
    display: inline-block;
    background: var(--accent-color);
    color: var(--secondary-color);
    padding: 10px 30px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    font-family: var(--font-heading);
    text-decoration: none;
  }

  .btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  }

  .btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

  /* 图标样式 */
  .icon {
    width: 50px;
    height: 50px;
    fill: var(--accent-color);
    transition: fill 0.3s;
  }

  .icon:hover {
    fill: var(--primary-color);
  }

  /* 图片画廊 */
  .gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
  }

  .gallery img {
    width: 320px;
    height: 320px;
    object-fit: cover;
    border-radius: 10px;
  }

  /* 页脚样式 */
  footer {
    text-align: center;
    padding: 20px;
    background: var(--secondary-color);
    border-top: 1px solid #e0e0e0;
    font-size: 14px;
    color: #777777;
  }

  /* 响应式设计 */
  @media (max-width: 1440px) {
    .container {
      max-width: 1000px;
    }
  }

  @media (max-width: 1200px) {
    .container {
      max-width: 900px;
    }
  }

  @media (max-width: 1024px) {
    .cards {
      flex-direction: column;
      align-items: center;
    }

    .card {
      width: 80%;
    }
  }

  @media (max-width: 768px) {
    .navbar ul {
      flex-direction: column;
      align-items: center;
    }

    .navbar ul li {
      margin: 10px 0;
    }

    .gallery img {
      width: 100%;
      height: auto;
    }
  }

  @media (max-width: 480px) {
    .card img {
      height: 150px;
    }

    .card-content {
      padding: 15px;
    }

    .card-title {
      font-size: 18px;
    }

    .card-description {
      font-size: 14px;
    }

    .btn {
      padding: 8px 20px;
      font-size: 14px;
    }

    article h2 {
      font-size: 24px;
    }

    article h3 {
      font-size: 20px;
    }

    article h4 {
      font-size: 18px;
    }

    article p {
      font-size: 14px;
    }

    .example-section h2 {
      font-size: 22px;
    }

    .example-section p {
      font-size: 16px;
    }
  }

  @media (max-width: 320px) {
    .navbar ul li a {
      font-size: 14px;
    }

    .card img {
      height: 120px;
    }

    .card-title {
      font-size: 16px;
    }

    .card-description {
      font-size: 12px;
    }

    .btn {
      padding: 6px 15px;
      font-size: 12px;
    }

    article h2 {
      font-size: 20px;
    }

    article h3 {
      font-size: 18px;
    }

    article h4 {
      font-size: 16px;
    }

    article p {
      font-size: 12px;
    }

    .example-section h2 {
      font-size: 20px;
    }

    .example-section p {
      font-size: 14px;
    }
  }

  /* 动画效果 */
  @keyframes aurora-move {
    0% {
      background-position: 0% 50%;
    }
    50% {
      background-position: 100% 50%;
    }
    100% {
      background-position: 0% 50%;
    }
  }

  .animated-background {
    background: var(--background-gradient);
    animation: aurora-move 15s linear infinite;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
  }