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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: #ffffff;
    line-height: 1.6;
    padding: 20px;
  }

  .container {
    max-width: 1200px;
    margin: auto;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
  }

  h1, h2, h3, h4 {
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
    margin-bottom: 20px;
  }

  h1 {
    font-size: 2.5em;
    text-align: center;
    margin-bottom: 40px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1em;
  }

  ul, ol {
    margin-left: 20px;
    margin-bottom: 20px;
  }

  code {
    background: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 5px;
    display: block;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
  }

  table, th, td {
    border: 1px solid #ffffff;
  }

  th, td {
    padding: 10px;
    text-align: left;
  }

  a {
    color: #00e6e6;
    text-decoration: none;
    position: relative;
  }

  a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #00e6e6;
    transition: width 0.3s;
    position: absolute;
    bottom: -5px;
    left: 0;
  }

  a:hover::after {
    width: 100%;
  }

  img {
    max-width: 100%;
    border-radius: 10px;
    margin-bottom: 20px;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
  }

  .tooltip {
    position: relative;
    display: inline-block;
    cursor: pointer;
  }

  .tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }

  .tooltip:hover::after {
    opacity: 1;
  }

  .highlight {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 5px;
    border-radius: 3px;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2em;
    }

    .container {
      padding: 20px;
    }
  }

  @media (max-width: 480px) {
    body {
      padding: 10px;
    }

    h1 {
      font-size: 1.8em;
    }

    p, li {
      font-size: 1em;
    }
  }

  /* 动画效果 */
  .fade-in {
    animation: fadeIn 2s ease-in-out;
  }

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

  /* 按钮样式 */
  .btn {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    color: #fff;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background 0.3s;
    text-decoration: none;
  }

  .btn:hover {
    background: linear-gradient(45deg, #0072ff, #00c6ff);
  }