:root {
    --primary-dark: #1a1a2e;
    --primary-blue: #16213e;
    --accent-purple: #9c27b0;
    --accent-teal: #00bcd4;
    --neutral-gray: #e0e0e0;
    --neutral-silver: #bdbdbd;
    --highlight: #ff4081;
    --text-light: #f5f5f5;
    --text-dark: #212121;
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap');
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: var(--text-light);
    line-height: 1.6;
    padding: 0;
    margin: 0;
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .header {
    text-align: center;
    padding: 3rem 0;
    position: relative;
    overflow: hidden;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample4.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: -1;
  }

  .title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-teal));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  }

  .subtitle {
    font-size: 1.2rem;
    color: var(--neutral-gray);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 800px;
    text-align: center;
    border-left: 4px solid var(--highlight);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  }

  article {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  article h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--accent-teal);
    position: relative;
    padding-left: 1rem;
  }

  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: linear-gradient(to bottom, var(--accent-purple), var(--accent-teal));
    border-radius: 2px;
  }

  article h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem;
    color: var(--neutral-gray);
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  article span[style*="color:purple"] {
    color: var(--accent-purple) !important;
    font-weight: bold;
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--highlight);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
  }

  code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: var(--neutral-gray);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
  }

  table th, table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  table th {
    background: rgba(0, 0, 0, 0.2);
    color: var(--accent-teal);
    font-weight: bold;
  }

  table tr:hover {
    background: rgba(255, 255, 255, 0.03);
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
  }

  .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .gallery-item:hover img {
    transform: scale(1.05);
  }

  .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 1rem;
    color: white;
    transform: translateY(100%);
    transition: transform 0.3s ease;
  }

  .gallery-item:hover .gallery-caption {
    transform: translateY(0);
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: var(--neutral-gray);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  .footer {
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    color: var(--neutral-silver);
    font-size: 0.9rem;
  }

  @media (max-width: 768px) {
    .container {
      padding: 1rem;
    }
    
    .title {
      font-size: 2rem;
    }
    
    .gallery {
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    article {
      padding: 1.5rem;
    }
  }

  @media (max-width: 480px) {
    .title {
      font-size: 1.8rem;
    }
    
    .subtitle {
      font-size: 1rem;
    }
    
    article h2 {
      font-size: 1.5rem;
    }
    
    article h3 {
      font-size: 1.2rem;
    }
  }

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

  .floating {
    animation: float 6s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% {
      opacity: 1;
    }
    50% {
      opacity: 0.5;
    }
  }

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

  .highlight {
    position: relative;
    display: inline-block;
  }

  .highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-teal));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
  }

  .highlight:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }