/* 全局样式 */
  body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #0d1b2a, #1b263b, #415a77);
    color: #ffffff;
    overflow-x: hidden;
  }

  a {
    color: #00ffea;
    text-decoration: none;
    rel: nofollow;
  }

  a:hover {
    text-decoration: underline;
  }

  /* 固定导航栏 */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.9);
    display: flex;
    justify-content: space-around;
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  }

  .nav-item {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: #ffffff;
    cursor: pointer;
    transition: background 0.3s ease, color 0.3s ease;
    padding: 10px 20px;
    border-radius: 5px;
  }

  .nav-item:hover, .nav-item.active {
    background: #00ffea;
    color: #000000;
  }

  /* 主内容区 */
  .main-content {
    padding: 100px 20px 50px 20px;
    max-width: 1200px;
    margin: 0 auto;
  }

  /* 标题样式 */
  h1, h2, h3, h4 {
    font-family: 'Roboto Bold', sans-serif;
    color: #ff6ec7;
    text-align: center;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
  }

  /* 文章样式 */
  article {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    margin-bottom: 40px;
  }

  article h2 {
    color: #ff6ec7;
  }

  article p {
    line-height: 1.6;
    margin-bottom: 15px;
  }

  article ul {
    list-style: disc inside;
    margin-bottom: 15px;
  }

  article li {
    margin-bottom: 10px;
  }

  /* 代码块样式 */
  pre {
    background: #1b263b;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  code {
    color: #00ffea;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
  }

  /* 示例数据展示 */
  .example-data {
    background: rgba(26, 26, 26, 0.8);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 40px;
  }

  .example-data h3 {
    color: #00ffea;
    margin-bottom: 15px;
  }

  .example-data ul {
    list-style: none;
    padding: 0;
  }

  .example-data li {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
  }

  .example-data img {
    width: 50px;
    height: 50px;
    margin-right: 15px;
    border-radius: 5px;
    flex-shrink: 0;
  }

  /* 图片网格 */
  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 15px;
    margin-bottom: 40px;
  }

  .image-grid img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
  }

  .image-grid img:hover {
    transform: scale(1.05);
  }

  /* 提示语 */
  .reference-note {
    text-align: center;
    font-size: 16px;
    color: #ff6ec7;
    margin-bottom: 30px;
  }

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

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

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

    .nav-item {
      margin-bottom: 10px;
    }
  }

  @media (max-width: 768px) {
    .main-content {
      padding: 120px 15px 40px 15px;
    }

    .image-grid {
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
  }

  @media (max-width: 480px) {
    .nav-item {
      padding: 8px 16px;
      font-size: 14px;
    }

    .example-data li {
      flex-direction: column;
      align-items: flex-start;
    }

    .example-data img {
      margin-bottom: 10px;
    }
  }

  @media (max-width: 320px) {
    .nav-item {
      padding: 6px 12px;
      font-size: 12px;
    }

    .example-data li {
      padding: 8px;
    }

    .reference-note {
      font-size: 14px;
    }
  }

  /* 动画效果 */
  .fade-in {
    animation: fadeIn 1s ease-in-out;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .grid-item:hover .info-card {
    display: block;
  }

  .info-card {
    display: none;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px;
    border-radius: 5px;
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
    color: #ffffff;
  }

  .grid-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
  }

  .grid-item img {
    width: 100%;
    height: auto;
    display: block;
  }

  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
  }

  .grid-item:hover {
    transform: scale(1.05);
    transition: transform 0.3s ease;
  }