:root {
    --primary-color: #0A2647;
    --background-color: #1E273D;
    --neon-blue: #3B82F6;
    --neon-purple: #9D27B0;
    --accent-color: #00FFD1;
    --text-color: #FFFFFF;
    --card-bg: rgba(10, 38, 71, 0.8);
    --section-spacing: 80px;
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  }

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

  body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
      radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 20%),
      radial-gradient(circle at 90% 80%, rgba(157, 39, 176, 0.1) 0%, transparent 20%);
  }

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

  .header {
    text-align: center;
    padding: 60px 0 40px;
    position: relative;
  }

  .header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
  }

  .header h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.8);
  }

  .notice {
    background: rgba(0, 255, 209, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 15px;
    margin: 30px 0;
    border-radius: 0 5px 5px 0;
    font-size: 0.9rem;
  }

  article {
    padding: 40px 0;
  }

  article h2 {
    font-size: 1.8rem;
    margin: var(--section-spacing) 0 30px;
    position: relative;
    padding-bottom: 15px;
    color: var(--neon-blue);
  }

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

  article p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s;
  }

  .image-card:hover img {
    transform: scale(1.05);
  }

  .image-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(10, 38, 71, 0.7), transparent);
    pointer-events: none;
  }

  pre {
    background: rgba(10, 38, 71, 0.7);
    border-left: 4px solid var(--neon-blue);
    border-radius: 0 5px 5px 0;
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: "CSS";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--neon-blue);
    color: white;
    padding: 2px 10px;
    font-size: 0.8rem;
    border-radius: 0 0 0 5px;
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-color);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
    background: rgba(10, 38, 71, 0.5);
    border-radius: 10px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  th {
    background-color: var(--primary-color);
    color: var(--neon-blue);
    font-weight: 500;
  }

  tr:hover {
    background-color: rgba(59, 130, 246, 0.1);
  }

  .highlight {
    color: var(--neon-blue);
    font-weight: 500;
  }

  .accent {
    color: var(--neon-purple);
    font-weight: 500;
  }

  .navigation {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 100;
  }

  .nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s;
  }

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

  .footer {
    text-align: center;
    padding: 40px 0;
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2rem;
    }
    
    article h2 {
      font-size: 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .navigation {
      display: none;
    }
  }

  /* Animations */
  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-10px);
    }
  }

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% {
      opacity: 1;
    }
    50% {
      opacity: 0.5;
    }
  }

  .pulsing {
    animation: pulse 2s ease-in-out infinite;
  }