:root {
    --primary-dark: #0D47A1;
    --primary-light: #1E88E5;
    --secondary-dark: #263238;
    --secondary-light: #37474F;
    --accent-blue: #00BFFF;
    --accent-purple: #9C27B0;
    --text-light: #ECEFF1;
    --text-dark: #263238;
    --highlight: #00E676;
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
  }

  body {
    background: linear-gradient(135deg, var(--secondary-dark), var(--primary-dark));
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

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

  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: -1;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  }

  .subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    opacity: 0.8;
    margin-bottom: 2rem;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem 0;
    border-left: 4px solid var(--highlight);
    font-size: 0.9rem;
  }

  article {
    background: rgba(30, 30, 40, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    margin: 2rem 0;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  }

  h2 {
    font-size: 2rem;
    margin: 2rem 0 1.5rem;
    color: var(--accent-blue);
    position: relative;
    padding-left: 1.5rem;
  }

  h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    background: linear-gradient(to bottom, var(--accent-blue), var(--accent-purple));
    border-radius: 5px;
  }

  h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-light);
  }

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

  pre {
    background: var(--secondary-dark);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1.5rem 0;
    overflow: auto;
    border-left: 4px solid var(--highlight);
    position: relative;
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--text-light);
    font-size: 0.9rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(30, 30, 40, 0.7);
    border-radius: 10px;
    overflow: hidden;
  }

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

  th {
    background: rgba(0, 191, 255, 0.2);
    color: var(--accent-blue);
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .image-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

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

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 15px 15px 0 0;
  }

  .image-caption {
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.8;
  }

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

  .nav-tab {
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
  }

  .nav-tab:hover {
    background: var(--accent-blue);
    color: var(--text-dark);
  }

  footer {
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    color: var(--text-light);
    opacity: 0.7;
    font-size: 0.9rem;
  }

  @media (max-width: 768px) {
    .container {
      padding: 1rem;
    }

    h1 {
      font-size: 2rem;
    }

    article {
      padding: 1.5rem;
    }

    .image-grid {
      grid-template-columns: 1fr;
    }
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }

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

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

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

  /* Special effects */
  .glow-text {
    text-shadow: 0 0 10px rgba(0, 191, 255, 0.7);
  }

  .tech-border {
    border: 1px solid rgba(0, 191, 255, 0.3);
    position: relative;
  }

  .tech-border::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 1px solid rgba(0, 191, 255, 0.5);
    border-radius: inherit;
    pointer-events: none;
    animation: borderPulse 4s linear infinite;
  }

  @keyframes borderPulse {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
  }