:root {
    --primary-dark: #3B2F2F;
    --primary-light: #8FBC8F;
    --accent-tech: #00BFFF;
    --accent-vintage: #556B2F;
    --text-light: #D3D3D3;
    --text-dark: #1C1C1C;
    --highlight: #00FF7F;
  }

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

  body {
    font-family: 'Arial', sans-serif;
    color: var(--text-light);
    background: linear-gradient(135deg, var(--primary-dark), var(--text-dark));
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  .header {
    text-align: center;
    padding: 60px 0 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: 0.2;
    z-index: -1;
  }

  .header h1 {
    font-family: 'Times New Roman', serif;
    font-size: 2.8rem;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 0 10px rgba(0, 191, 255, 0.5);
    position: relative;
    display: inline-block;
  }

  .header h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--highlight);
    border-radius: 3px;
  }

  .header p {
    max-width: 800px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
  }

  .notice {
    background: rgba(0, 191, 255, 0.1);
    border: 1px solid var(--accent-tech);
    border-radius: 5px;
    padding: 15px;
    margin: 20px 0;
    text-align: center;
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
  }

  .navbar {
    position: sticky;
    top: 0;
    background: rgba(59, 47, 47, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  .navbar ul {
    display: flex;
    justify-content: center;
    list-style: none;
    flex-wrap: wrap;
  }

  .navbar li {
    margin: 0 15px;
  }

  .navbar a {
    color: var(--highlight);
    text-decoration: none;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    padding: 5px 10px;
    position: relative;
    transition: all 0.3s ease;
  }

  .navbar a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: var(--accent-tech);
    bottom: 0;
    left: 50%;
    transition: all 0.3s ease;
  }

  .navbar a:hover {
    color: var(--accent-tech);
  }

  .navbar a:hover::after {
    width: 100%;
    left: 0;
  }

  article {
    background: rgba(28, 28, 28, 0.7);
    border-radius: 10px;
    padding: 40px;
    margin: 40px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
  }

  article h2 {
    font-family: 'Times New Roman', serif;
    color: white;
    font-size: 2rem;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--highlight), var(--accent-tech));
    border-radius: 3px;
  }

  article h3 {
    font-family: 'Times New Roman', serif;
    color: var(--highlight);
    font-size: 1.5rem;
    margin: 30px 0 20px;
  }

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

  pre {
    background: rgba(30, 30, 30, 0.9);
    border-left: 4px solid var(--highlight);
    border-radius: 5px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
  }

  code {
    color: var(--highlight);
    font-family: 'Courier New', monospace;
  }

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

  .image-card {
    background: rgba(59, 47, 47, 0.5);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 191, 255, 0.3);
  }

  .image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px 10px 0 0;
  }

  .image-card p {
    padding: 15px;
    font-size: 0.9rem;
    color: var(--text-light);
  }

  .footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    background: rgba(59, 47, 47, 0.5);
    border-top: 1px solid rgba(0, 191, 255, 0.2);
  }

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2rem;
    }
    
    article {
      padding: 25px;
    }
    
    .navbar ul {
      flex-direction: column;
      align-items: center;
    }
    
    .navbar li {
      margin: 5px 0;
    }
  }

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

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

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
  }

  .pulse {
    animation: pulse 2s ease-in-out infinite;
  }

  /* Additional decorative elements */
  .decorative-line {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--highlight), transparent);
    margin: 40px 0;
    opacity: 0.5;
  }

  .tech-dot {
    width: 10px;
    height: 10px;
    background: var(--highlight);
    border-radius: 50%;
    position: absolute;
    box-shadow: 0 0 10px var(--highlight);
  }