@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Roboto:wght@300;400;500&display=swap');
  
  :root {
    --primary-70: #f5f5dc;
    --primary-25: #808000;
    --accent-5: #dda0dd;
    --secondary: #add8e6;
    --dark: #654321;
    --light: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    background: var(--primary-70);
    overflow-x: hidden;
  }
  
  .wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  header {
    background: linear-gradient(135deg, var(--primary-70) 0%, var(--primary-25) 100%);
    padding: 2rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  
  header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
  }
  
  .header-content {
    position: relative;
    z-index: 1;
  }
  
  h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    color: var(--dark);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .subtitle {
    font-size: 1.2rem;
    color: var(--dark);
    max-width: 800px;
    margin: 0 auto 2rem;
  }
  
  .notice {
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 8px;
    display: inline-block;
    margin-top: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  nav {
    background: rgba(128, 128, 0, 0.9);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }
  
  .nav-container {
    display: flex;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
  }
  
  .nav-link {
    color: var(--light);
    text-decoration: none;
    padding: 0.5rem 1.5rem;
    margin: 0 0.5rem;
    font-weight: 500;
    transition: var(--transition);
    border-radius: 4px;
    position: relative;
  }
  
  .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
  }
  
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-5);
    transition: var(--transition);
  }
  
  .nav-link:hover::after {
    width: 80%;
  }
  
  main {
    padding: 3rem 0;
  }
  
  article {
    background: rgba(255, 255, 255, 0.9);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
  }
  
  h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }
  
  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-25), var(--accent-5));
    border-radius: 3px;
  }
  
  h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    color: var(--dark);
    margin: 2rem 0 1rem;
  }
  
  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
  }
  
  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
  }
  
  .image-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }
  
  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }
  
  .image-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
  }
  
  .image-caption {
    padding: 1.5rem;
    text-align: center;
  }
  
  pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }
  
  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-5), var(--secondary));
    border-radius: 8px 0 0 8px;
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
  }
  
  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
  }
  
  th {
    background-color: var(--primary-25);
    color: var(--light);
    font-weight: 500;
  }
  
  tbody tr:nth-child(even) {
    background-color: rgba(128, 128, 0, 0.05);
  }
  
  tbody tr:hover {
    background-color: rgba(128, 128, 0, 0.1);
  }
  
  footer {
    background: linear-gradient(135deg, var(--primary-25), var(--dark));
    color: var(--light);
    padding: 3rem 0;
    text-align: center;
  }
  
  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 1.5rem 0;
  }
  
  .footer-link {
    color: var(--light);
    text-decoration: none;
    margin: 0 1rem;
    transition: var(--transition);
  }
  
  .footer-link:hover {
    color: var(--accent-5);
  }
  
  .copyright {
    margin-top: 1.5rem;
    opacity: 0.8;
  }
  
  @media (max-width: 768px) {
    h1 {
      font-size: 2.2rem;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    h3 {
      font-size: 1.5rem;
    }
    
    article {
      padding: 2rem;
    }
    
    .nav-container {
      flex-wrap: wrap;
    }
    
    .nav-link {
      margin: 0.25rem;
      padding: 0.5rem 1rem;
    }
  }
  
  @media (max-width: 480px) {
    h1 {
      font-size: 1.8rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    article {
      padding: 1.5rem;
    }
    
    pre {
      padding: 1rem;
      font-size: 0.8rem;
    }
  }
  
  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .fade-in {
    animation: fadeIn 0.8s ease forwards;
  }
  
  .delay-1 {
    animation-delay: 0.2s;
  }
  
  .delay-2 {
    animation-delay: 0.4s;
  }
  
  .delay-3 {
    animation-delay: 0.6s;
  }
  
  /* Gradient animation */
  .gradient-text {
    background: linear-gradient(90deg, var(--primary-25), var(--accent-5), var(--secondary));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientShift 5s ease infinite;
  }
  
  @keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  /* Floating elements */
  .floating {
    animation: floating 6s ease-in-out infinite;
  }
  
  @keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
  }