/* Root variables for color scheme */
  :root {
    --main-color: #0074D9; /* 科技蓝 */
    --secondary-color: #7F00FF; /* 灵感紫 */
    --accent-color: #FFDC00; /* 亮黄色 */
    --background-color: #f5f5f5;
    --text-color: #ffffff;
    --secondary-text-color: #333333;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --font-family: 'Roboto', sans-serif;
  }

  /* Global Styles */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #e0eafc, #cfdef3);
    color: var(--secondary-text-color);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
  }

  a {
    color: var(--main-color);
    text-decoration: none;
    transition: color var(--transition-speed);
  }

  a:hover {
    color: var(--accent-color);
  }

  /* Container */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
  }

  /* Article Styles */
  article {
    display: flex;
    flex-direction: column;
    gap: 40px;
  }

  article h2, article h3, article h4 {
    font-weight: bold;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
  }

  article h2 {
    font-size: 2em;
    color: var(--main-color);
    border-bottom: 3px solid var(--accent-color);
  }

  article h3 {
    font-size: 1.75em;
    color: var(--secondary-color);
  }

  article h4 {
    font-size: 1.5em;
    color: var(--main-color);
  }

  article p {
    font-size: 1em;
    color: var(--secondary-text-color);
  }

  /* Section Blocks */
  .section {
    background: #ffffff;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
  }

  .section:nth-child(odd) {
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
  }

  .section::before {
    content: '';
    position: absolute;
    height: 4px;
    width: 100px;
    background: linear-gradient(to right, var(--main-color), var(--accent-color));
    bottom: 0;
    left: 20px;
    border-radius: 2px;
  }

  /* Image Styles */
  .section img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  }

  .section img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
  }

  /* Prompt Style */
  .prompt {
    text-align: center;
    font-size: 1.2em;
    color: var(--main-color);
    margin-top: 20px;
    padding: 10px;
    border: 2px dashed var(--accent-color);
    border-radius: var(--border-radius);
    background: #fffbea;
  }

  /* Responsive Layout */
  @media (max-width: 768px) {
    .section {
      padding: 20px;
    }

    article h2 {
      font-size: 1.75em;
    }

    article h3 {
      font-size: 1.5em;
    }

    article p {
      font-size: 0.95em;
    }
  }

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

    .section::before {
      width: 60px;
      left: 10px;
    }

    article h2 {
      font-size: 1.5em;
    }

    article h3 {
      font-size: 1.25em;
    }

    .prompt {
      font-size: 1em;
    }
  }

  /* Button Styles */
  button {
    background-color: var(--main-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    font-size: 1em;
  }

  button:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
  }

  /* Decorative Elements */
  .decorative {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
  }

  .decorative img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 50%;
    transition: transform var(--transition-speed);
  }

  .decorative img:hover {
    transform: rotate(10deg);
  }

  /* Footer Style */
  footer {
    text-align: center;
    padding: 20px;
    color: var(--secondary-text-color);
    font-size: 0.9em;
  }