:root {
    --primary: #212530;
    --secondary: #00CFFF;
    --accent: #009ACD;
    --bg-light: #F8F9FA;
    --text-dark: #333;
    --text-light: #fff;
    --transition: all 0.3s ease;
  }

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

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

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

  .header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-light);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .header::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;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
  }

  .title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: floatText 3s ease-in-out infinite;
    text-shadow: 0 0 10px rgba(0, 207, 255, 0.5);
  }

  @keyframes floatText {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  .subtitle {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .notice {
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 8px;
    display: inline-block;
    margin-top: 30px;
    backdrop-filter: blur(5px);
  }

  .navbar {
    position: sticky;
    top: 0;
    background: rgba(33, 37, 48, 0.95);
    color: var(--text-light);
    display: flex;
    justify-content: center;
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  }

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

  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: var(--transition);
  }

  .nav-links a:hover {
    color: var(--secondary);
    background: rgba(255, 255, 255, 0.1);
  }

  .article-container {
    padding: 60px 0;
  }

  article {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
  }

  article h2 {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    border-radius: 2px;
  }

  article h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin: 40px 0 20px;
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    line-height: 1.8;
  }

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

  .image-card {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

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

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

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

  pre {
    background: var(--primary);
    color: var(--secondary);
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 30px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    font-family: 'Courier New', monospace;
    line-height: 1.5;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0, 207, 255, 0.1);
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--secondary);
  }

  .footer {
    background: var(--primary);
    color: var(--text-light);
    padding: 60px 0;
    text-align: center;
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer p {
    margin-bottom: 20px;
    opacity: 0.8;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
  }

  .footer-links a {
    color: var(--secondary);
    text-decoration: none;
    transition: var(--transition);
  }

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

  @media (max-width: 768px) {
    .title {
      font-size: 2.5rem;
    }
    
    .subtitle {
      font-size: 1.2rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.5rem;
    }
  }

  @media (max-width: 480px) {
    .title {
      font-size: 2rem;
    }
    
    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }