:root {
    --primary-color: #f5f5dc;
    --secondary-color: #d2b48c;
    --accent-color: #1e90ff;
    --text-color: #333;
    --highlight-color: #ff7f50;
    --dark-accent: #b87333;
    --light-accent: #a0d6b4;
  }

  @import url('https://fonts.googleapis.com/css2?family=Raleway:wght@400;600&family=Lobster&display=swap');

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

  body {
    font-family: 'Raleway', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background: radial-gradient(circle at 10% 20%, rgba(245, 245, 220, 0.8), rgba(210, 180, 140, 0.3));
    background-attachment: fixed;
    padding: 0;
    margin: 0;
    overflow-x: hidden;
  }

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

  .header {
    text-align: center;
    padding: 40px 0;
    background: linear-gradient(135deg, rgba(245, 245, 220, 0.9), rgba(210, 180, 140, 0.7));
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
  }

  .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: -1;
  }

  h1, h2, h3, h4 {
    font-family: 'Lobster', cursive;
    color: var(--dark-accent);
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
  }

  h1 {
    font-size: 2.5rem;
    color: var(--dark-accent);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  }

  h2 {
    font-size: 2rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-top: 40px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--highlight-color);
    margin-top: 30px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  .content-block {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
  }

  .content-block::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border-radius: 20px;
    background: linear-gradient(45deg, var(--secondary-color), var(--light-accent));
    z-index: -1;
    opacity: 0.3;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
  }

  pre {
    background: rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--highlight-color);
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  code {
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 5px;
    border-radius: 3px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
  }

  .note {
    background: linear-gradient(to right, rgba(176, 224, 230, 0.3), rgba(255, 255, 255, 0.8));
    border-left: 4px solid var(--accent-color);
    padding: 15px;
    margin: 20px 0;
    border-radius: 0 5px 5px 0;
  }

  .reference {
    text-align: center;
    font-size: 0.9rem;
    color: #666;
    margin-top: 50px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 10px;
  }

  .nav-tabs {
    display: flex;
    list-style: none;
    margin: 30px 0;
    padding: 0;
    border-bottom: 1px solid var(--secondary-color);
  }

  .nav-tabs li {
    margin-right: 15px;
  }

  .nav-tabs a {
    display: block;
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-color);
    border-radius: 5px 5px 0 0;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-tabs a:hover {
    background: rgba(210, 180, 140, 0.2);
  }

  .nav-tabs a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--highlight-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
  }

  .nav-tabs a:hover::after {
    transform: scaleX(1);
  }

  @media (max-width: 768px) {
    .container {
      padding: 15px;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    h3 {
      font-size: 1.2rem;
    }
    
    .content-block {
      padding: 20px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

  .floating {
    animation: float 3s ease-in-out infinite;
  }