:root {
    --primary: #0E1F3D;
    --secondary: #92F6C3;
    --accent: #FF9800;
    --bg: #F7F8FA;
    --text: #333333;
    --light: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  /* Header Styles */
  header {
    background: linear-gradient(135deg, var(--primary) 0%, #1A3A6A 100%);
    color: var(--light);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(to right, var(--secondary), #4CAF50);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
  }

  nav a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all 0.3s ease;
  }

  nav a:hover {
    color: var(--secondary);
  }

  nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--secondary);
    transition: width 0.3s ease;
  }

  nav a:hover::after {
    width: 100%;
  }

  /* Hero Section */
  .hero {
    padding: 150px 0 100px;
    background: linear-gradient(rgba(14, 31, 61, 0.8), rgba(14, 31, 61, 0.8)), 
                url('https://images.gptkong.com/demo/sample1.png');
    background-size: cover;
    background-position: center;
    color: var(--light);
    text-align: center;
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    animation: fadeIn 1s ease;
  }

  .hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
    opacity: 0.9;
  }

  /* Main Content */
  .main-content {
    padding: 80px 0;
  }

  .section {
    margin-bottom: 80px;
    background: var(--light);
    border-radius: 10px;
    padding: 40px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  }

  .section-title {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary);
    position: relative;
    padding-bottom: 15px;
  }

  .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--accent), var(--secondary));
    border-radius: 3px;
  }

  /* Article Styles */
  article {
    max-width: 900px;
    margin: 0 auto;
  }

  article h2 {
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--primary);
  }

  article h3 {
    font-size: 28px;
    margin: 40px 0 20px;
    color: var(--primary);
  }

  article p {
    margin-bottom: 20px;
    font-size: 18px;
  }

  /* Code Block Styles */
  pre {
    background: #282c34;
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #abb2bf;
    font-size: 16px;
    line-height: 1.5;
  }

  /* Image Gallery */
  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .gallery-item:hover img {
    transform: scale(1.1);
  }

  /* Footer */
  footer {
    background: var(--primary);
    color: var(--light);
    padding: 50px 0 20px;
    text-align: center;
  }

  .footer-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
    display: inline-block;
    background: linear-gradient(to right, var(--secondary), #4CAF50);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
  }

  .footer-links a {
    color: var(--light);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: var(--secondary);
  }

  .copyright {
    opacity: 0.7;
    font-size: 14px;
  }

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

  /* Responsive Styles */
  @media (max-width: 992px) {
    .hero h1 {
      font-size: 40px;
    }
    
    .hero p {
      font-size: 18px;
    }
    
    .section-title {
      font-size: 28px;
    }
  }

  @media (max-width: 768px) {
    nav ul {
      gap: 15px;
    }
    
    .hero {
      padding: 120px 0 80px;
    }
    
    .hero h1 {
      font-size: 32px;
    }
    
    article h2 {
      font-size: 28px;
    }
    
    article h3 {
      font-size: 24px;
    }
  }

  @media (max-width: 576px) {
    .header-container {
      flex-direction: column;
      gap: 15px;
    }
    
    nav ul {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .hero {
      padding: 100px 0 60px;
    }
    
    .section {
      padding: 30px 20px;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }