:root {
    --primary-dark: #0D2C54;
    --primary-light: #8300FF;
    --secondary: #EAEAEA;
    --accent: #14F1F8;
    --text-dark: #333;
    --text-light: #fff;
    --transition: all 0.3s ease;
  }

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

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

  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    background-attachment: fixed;
    overflow-x: hidden;
  }

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

  .header {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    overflow: hidden;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(20, 241, 248, 0.1), transparent 70%);
    z-index: -1;
  }

  .header-content {
    max-width: 800px;
    padding: 40px;
    background: rgba(13, 44, 84, 0.7);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.5s;
  }

  @keyframes fadeInUp {
    to {
      transform: translateY(0);
      opacity: 1;
    }
  }

  h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 3px;
    background: linear-gradient(to right, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--secondary);
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(13, 44, 84, 0.9);
    color: var(--accent);
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 0.9rem;
    z-index: 1000;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  }

  .main-content {
    background-color: rgba(234, 234, 234, 0.95);
    padding: 80px 0;
    position: relative;
  }

  .main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center;
    background-size: cover;
    opacity: 0.1;
    z-index: -1;
  }

  article {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }

  h2 {
    font-family: 'Orbitron', sans-serif;
    color: var(--primary-light);
    font-size: 2rem;
    margin: 40px 0 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(to right, var(--accent), transparent);
  }

  h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--primary-dark);
    font-size: 1.5rem;
    margin: 30px 0 15px;
    letter-spacing: 1px;
  }

  p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-dark);
  }

  pre {
    background: var(--primary-dark);
    color: var(--secondary);
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    margin: 30px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    position: relative;
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent), var(--primary-light));
    border-radius: 10px 0 0 10px;
  }

  code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .image-card {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .image-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
  }

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

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
  }

  th {
    background-color: var(--primary-dark);
    color: var(--secondary);
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
  }

  tr:nth-child(even) {
    background-color: rgba(20, 241, 248, 0.1);
  }

  tr:hover {
    background-color: rgba(20, 241, 248, 0.2);
  }

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

  .nav-link {
    width: 12px;
    height: 12px;
    margin: 10px 0;
    background-color: rgba(234, 234, 234, 0.5);
    border-radius: 50%;
    transition: var(--transition);
    cursor: pointer;
  }

  .nav-link.active {
    background-color: var(--accent);
    transform: scale(1.3);
  }

  .footer {
    background-color: var(--primary-dark);
    color: var(--secondary);
    padding: 50px 0;
    text-align: center;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2rem;
    }
    
    .header {
      height: 60vh;
    }
    
    article {
      padding: 20px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      display: none;
    }
  }