@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@700&family=Montserrat:wght@400;500&display=swap');
  
  :root {
    --primary-dark: #121212;
    --primary-blue: #2C3E50;
    --accent-green: #27AE60;
    --accent-gray: #AEB3B9;
    --gradient-dark: linear-gradient(135deg, #1A1A1A 0%, #000000 100%);
    --gradient-accent: linear-gradient(90deg, #27AE60 0%, #1ABC9C 100%);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--accent-gray);
    background: var(--gradient-dark);
    overflow-x: hidden;
    min-height: 100%;
  }

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

  /* Header Styles */
  .header {
    background: var(--primary-blue);
    padding: 20px 0;
    position: relative;
    z-index: 100;
    box-shadow: var(--shadow-lg);
  }

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

  .logo {
    font-family: 'Roboto', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-green);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .logo img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
  }

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

  .nav-link {
    color: var(--accent-gray);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
  }

  .nav-link:hover {
    color: var(--accent-green);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-green);
    transition: var(--transition);
  }

  .nav-link:hover::after {
    width: 100%;
  }

  /* Hero Section */
  .hero {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
  }

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

  .hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
  }

  .hero-title {
    font-family: 'Roboto', sans-serif;
    font-size: 48px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 20px;
    color: var(--accent-gray);
    margin-bottom: 40px;
  }

  .hero-badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 500;
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  /* Main Content */
  .main {
    padding: 60px 0;
  }

  .article-container {
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 60px;
  }

  article h2 {
    font-family: 'Roboto', sans-serif;
    font-size: 32px;
    color: var(--accent-green);
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background: var(--accent-green);
  }

  article h3 {
    font-family: 'Roboto', sans-serif;
    font-size: 24px;
    color: white;
    margin: 40px 0 20px;
  }

  article p {
    margin-bottom: 20px;
    font-size: 16px;
  }

  /* Code Blocks */
  pre {
    background: #1A1A1A;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 4px solid var(--accent-green);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #F8F8F2;
    font-size: 14px;
  }

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

  .gallery-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
  }

  .gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
  }

  .gallery-item:hover img {
    transform: scale(1.05);
  }

  /* Table Styles */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: #1A1A1A;
    border-radius: 10px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #2C3E50;
  }

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

  tr:hover {
    background: rgba(39, 174, 96, 0.1);
  }

  /* Footer */
  .footer {
    background: #1A1A1A;
    padding: 40px 0;
    text-align: center;
  }

  .footer-text {
    color: var(--accent-gray);
    font-size: 14px;
  }

  /* Responsive Adjustments */
  @media (max-width: 992px) {
    .hero-title {
      font-size: 36px;
    }
    
    .hero-subtitle {
      font-size: 18px;
    }
  }

  @media (max-width: 768px) {
    .nav {
      gap: 15px;
    }
    
    .hero-title {
      font-size: 32px;
    }
    
    .article-container {
      padding: 30px;
    }
  }

  @media (max-width: 576px) {
    .header-container {
      flex-direction: column;
      gap: 20px;
    }
    
    .nav {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .hero-title {
      font-size: 28px;
    }
    
    .article-container {
      padding: 20px;
    }
  }