:root {
    --primary: #0E1E3D;
    --gradient-start: #1C7ED6;
    --gradient-end: #42B8F5;
    --accent-orange: #FF9800;
    --accent-green: #63DDAF;
    --dark-bg: #1C1C1C;
    --card-bg: #2A2A2A;
    --text-light: #FFFFFF;
    --text-muted: #CCCCCC;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  }

  @font-face {
    font-family: 'TechFont';
    src: local('Montserrat'), local('Arial');
  }

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

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

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

  header {
    background: rgba(14, 30, 61, 0.9);
    padding: 20px 0;
    position: relative;
    z-index: 100;
    box-shadow: var(--shadow);
  }

  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .reference-badge {
    background: var(--accent-orange);
    color: var(--primary);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(255, 152, 0, 0.3);
  }

  .hero {
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(28, 126, 214, 0.2) 0%, transparent 50%);
    z-index: -1;
  }

  .hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--text-light), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .hero p {
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.1rem;
  }

  .hero-image {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
  }

  .hero-image img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    filter: grayscale(20%);
  }

  .hero-image img:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
    filter: grayscale(0%);
  }

  .content-section {
    padding: 60px 0;
    position: relative;
  }

  .content-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') no-repeat;
    background-size: 30%;
    background-position: right bottom;
    opacity: 0.1;
    z-index: -1;
  }

  article {
    background: rgba(28, 28, 28, 0.8);
    border-radius: 15px;
    padding: 40px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    margin-bottom: 60px;
  }

  article h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--gradient-end);
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-green));
  }

  article h3 {
    font-size: 1.5rem;
    margin: 30px 0 20px;
    color: var(--gradient-start);
  }

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

  pre {
    background: rgba(10, 20, 40, 0.7);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 25px 0;
    border-left: 4px solid var(--accent-orange);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-green);
    font-size: 0.95rem;
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }

  .image-gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
  }

  .image-gallery img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  }

  .data-card {
    background: linear-gradient(135deg, rgba(28, 126, 214, 0.2), rgba(66, 184, 245, 0.1));
    border-radius: 10px;
    padding: 25px;
    margin: 30px 0;
    border: 1px solid rgba(66, 184, 245, 0.3);
    box-shadow: var(--shadow);
  }

  .data-card h4 {
    color: var(--accent-green);
    margin-bottom: 15px;
    font-size: 1.2rem;
  }

  .data-card p {
    color: var(--text-muted);
  }

  .data-highlight {
    color: var(--accent-green);
    font-weight: bold;
  }

  .accent-orange {
    color: var(--accent-orange);
  }

  footer {
    background: var(--primary);
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    flex-wrap: wrap;
  }

  .footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: var(--gradient-end);
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2rem;
    }

    article {
      padding: 30px;
    }

    .image-gallery {
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 1.8rem;
    }

    article {
      padding: 20px;
    }

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

  /* Animations */
  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-15px);
    }
  }

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

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

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