/* 基础字体和颜色设置 */
  body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    color: #c5c8d0;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    overflow-x: hidden;
  }
  h1, h2, h3, h4, h5, h6 {
    font-family: 'Futura', sans-serif;
    color: #4a76a8;
    font-weight: bold;
  }
  p {
    line-height: 1.6;
    margin: 15px 0;
  }
  /* 导航球 */
  .nav-ball {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: #4a76a8;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: transform 0.3s ease;
    z-index: 1000;
  }
  .nav-ball:hover {
    transform: scale(1.1);
  }
  /* 导航菜单 */
  .nav-menu {
    display: none;
    position: fixed;
    bottom: 90px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    z-index: 999;
  }
  .nav-ball.active + .nav-menu {
    display: block;
  }
  .nav-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .nav-menu ul li {
    margin: 10px 0;
  }
  .nav-menu ul li a {
    color: #c5c8d0;
    text-decoration: none;
    transition: color 0.3s ease;
  }
  .nav-menu ul li a:hover {
    color: #4a76a8;
  }
  /* 主容器 */
  .container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 20px;
    max-width: 1440px;
    margin: 0 auto;
  }
  /* 左侧3D背景图 */
  .left-panel {
    flex: 2;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center / cover;
    height: 100vh;
    position: relative;
  }
  /* 右侧文本框 */
  .right-panel {
    flex: 1;
    background: rgba(36, 36, 62, 0.8);
    padding: 20px;
    border-radius: 8px;
    margin-left: 20px;
    overflow-y: auto;
    height: 100vh;
  }
  /* 卡片样式 */
  .card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
  }
  /* 按钮样式 */
  .button {
    position: relative;
    overflow: hidden;
    background-color: #4a76a8;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    font-size: 16px;
    transition: background-color 0.3s ease;
  }
  .button:hover {
    background-color: #3b5a80;
  }
  .button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.5s ease;
  }
  .button:hover::before {
    width: 200px;
    height: 200px;
    opacity: 1;
  }
  /* 示例文章样式 */
  .sample-article {
    background: rgba(36, 36, 62, 0.8);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    overflow-y: auto;
    max-height: 400px;
  }
  .sample-article pre {
    background: #1e1e1e;
    padding: 10px;
    border-radius: 4px;
    overflow-x: auto;
  }
  .sample-article code {
    color: #c5c8d0;
    font-family: 'Courier New', Courier, monospace;
  }
  /* 表格样式 */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
  }
  table, th, td {
    border: 1px solid #4a76a8;
  }
  th, td {
    padding: 10px;
    text-align: left;
  }
  th {
    background: #4a76a8;
    color: white;
  }
  /* 响应式设计 */
  @media (max-width: 1440px) {
    .container {
      padding: 15px;
    }
  }
  @media (max-width: 1200px) {
    .container {
      flex-direction: column;
    }
    .left-panel, .right-panel {
      width: 100%;
      height: auto;
      margin: 0;
    }
    .right-panel {
      margin-top: 20px;
    }
  }
  @media (max-width: 1024px) {
    h1 {
      font-size: 2em;
    }
    h2 {
      font-size: 1.5em;
    }
  }
  @media (max-width: 768px) {
    .container {
      flex-direction: column;
    }
    .left-panel {
      height: 300px;
    }
    .right-panel {
      height: auto;
    }
  }
  @media (max-width: 480px) {
    h1 {
      font-size: 1.5em;
    }
    h2 {
      font-size: 1.2em;
    }
    .button {
      padding: 8px 16px;
      font-size: 14px;
    }
  }
  @media (max-width: 320px) {
    .left-panel {
      display: none;
    }
    .right-panel {
      margin: 0;
      padding: 15px;
    }
  }
  /* 动态粒子效果 */
  .particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
  }