:root {
    --primary: linear-gradient(135deg, #1e3c72, #2a5298, #4b6cb7);
    --secondary: rgba(255, 255, 255, 0.2);
    --accent: linear-gradient(45deg, #ff8a00, #e52e71);
    --text: #ffffff;
    --bg: #0a192f;
    --card-bg: rgba(255, 255, 255, 0.1);
    --border: rgba(255, 255, 255, 0.3);
  }

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

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

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

  header {
    background: var(--primary);
    padding: 20px 0;
    position: relative;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  }

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

  .logo {
    font-size: 24px;
    font-weight: 700;
    background: var(--accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: center;
    backdrop-filter: blur(5px);
    border: 1px solid var(--border);
  }

  .hero {
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    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: 0.2;
  }

  .hero-content {
    text-align: center;
    z-index: 1;
    padding: 0 20px;
  }

  h1 {
    font-size: 48px;
    margin-bottom: 20px;
    background: var(--accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 30px;
  }

  .btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(229, 46, 113, 0.4);
  }

  .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(229, 46, 113, 0.6);
  }

  article {
    padding: 60px 0;
  }

  h2 {
    font-size: 32px;
    margin: 40px 0 20px;
    position: relative;
    display: inline-block;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
  }

  h3 {
    font-size: 24px;
    margin: 30px 0 15px;
    color: #4b6cb7;
  }

  p {
    margin-bottom: 20px;
    font-size: 17px;
  }

  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }

  .card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
  }

  .card:hover img {
    transform: scale(1.03);
  }

  pre {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    border-left: 4px solid #e52e71;
    font-family: 'Courier New', monospace;
    font-size: 15px;
    line-height: 1.5;
  }

  code {
    color: #ff8a00;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    border-radius: 10px;
    overflow: hidden;
  }

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

  th {
    background: rgba(30, 60, 114, 0.5);
    font-weight: 600;
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  }

  .gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
  }

  footer {
    background: var(--primary);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
  }

  .footer-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: #ff8a00;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 36px;
    }
    
    h2 {
      font-size: 28px;
    }
    
    h3 {
      font-size: 22px;
    }
    
    .card-grid {
      grid-template-columns: 1fr;
    }
    
    .hero {
      height: 400px;
    }
  }

  @media (max-width: 480px) {
    h1 {
      font-size: 28px;
    }
    
    h2 {
      font-size: 24px;
    }
    
    h3 {
      font-size: 20px;
    }
    
    .btn {
      padding: 12px 24px;
    }
    
    .hero p {
      font-size: 16px;
    }
  }