:root {
    --primary-dark: #0f2027;
    --primary-mid: #203a43;
    --primary-light: #2c5364;
    --accent-blue: #0072ff;
    --accent-cyan: #00c6ff;
    --accent-purple: #fc00ff;
    --text-dark: #333333;
    --text-light: #ffffff;
    --card-bg: #ffffff;
    --section-bg: #f8fafc;
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
  }

  body {
    background-color: var(--section-bg);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  .header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-mid), var(--primary-light));
    color: var(--text-light);
    padding: 40px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    animation: flow 10s linear infinite;
  }

  @keyframes flow {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
  }

  h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
  }

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

  .notice {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 5px;
    margin-top: 20px;
    display: inline-block;
    font-size: 0.9rem;
  }

  .navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background: rgba(15, 32, 39, 0.95);
    color: var(--text-light);
    display: flex;
    justify-content: center;
    padding: 15px 0;
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .main-content {
    padding: 40px 0;
  }

  article {
    background-color: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 40px;
    margin-bottom: 40px;
  }

  h2 {
    color: var(--primary-dark);
    font-size: 1.8rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
  }

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

  h3 {
    color: var(--primary-mid);
    font-size: 1.4rem;
    margin: 30px 0 15px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.05rem;
  }

  pre {
    background: #2d3748;
    border-radius: 10px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    position: relative;
  }

  code {
    color: #e2e8f0;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .decor-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

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

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    margin: 20px 0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

  .footer {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-mid));
    color: var(--text-light);
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
  }

  @media (max-width: 768px) {
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 25px;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    .header {
      padding: 30px 0;
    }
    
    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    
    article {
      padding: 20px;
    }
    
    pre {
      padding: 15px;
    }
  }