:root {
    --primary: #0066cc;
    --secondary: #00cc99;
    --accent: #ff6600;
    --light: #f5f9ff;
    --dark: #001a33;
    --text: #333333;
    --text-light: #666666;
  }

  @font-face {
    font-family: 'TechFont';
    src: local('Montserrat'), local('Arial');
  }

  body {
    font-family: 'TechFont', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, var(--light) 0%, #e6f0ff 100%);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
  }

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

  .header {
    background: linear-gradient(90deg, var(--primary) 0%, #004d99 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
  }

  .header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent) 0%, #ff9933 100%);
  }

  .header h1 {
    font-size: 2.5rem;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: fadeIn 1s ease-out;
  }

  .header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 1rem auto 0;
  }

  .notice {
    background: rgba(255, 255, 255, 0.9);
    color: var(--dark);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 800px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
  }

  article {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    padding: 2.5rem;
    margin: 2rem 0;
    position: relative;
    overflow: hidden;
  }

  article::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
  }

  h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
  }

  h3 {
    color: var(--dark);
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
  }

  p {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 1.5rem;
    line-height: 1.7;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
  }

  .image-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 10px;
  }

  .image-card:hover::after {
    opacity: 1;
  }

  pre {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    border-left: 4px solid var(--primary);
    font-size: 0.95rem;
    line-height: 1.5;
  }

  code {
    font-family: 'Courier New', monospace;
    color: #333;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
  }

  th {
    background-color: var(--primary);
    color: white;
  }

  tr:nth-child(even) {
    background-color: #f9f9f9;
  }

  tr:hover {
    background-color: #f1f7ff;
  }

  .nav-dots {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 100;
  }

  .nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .nav-dot:hover, .nav-dot.active {
    background: var(--primary);
    transform: scale(1.3);
  }

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

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2rem;
    }
    
    .header p {
      font-size: 1rem;
    }
    
    article {
      padding: 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-dots {
      display: none;
    }
  }