@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;700&family=Roboto:wght@300;400;500;700&display=swap');
  
  :root {
    --primary-dark: #0f2027;
    --primary: #203a43;
    --primary-light: #2c5364;
    --accent: #00d2ff;
    --accent-dark: #3a7bd5;
    --neon: #00ff9d;
    --text-light: #e0e0e0;
    --text-dark: #1e1e1e;
    --card-bg: rgba(30, 30, 30, 0.8);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* Header Styles */
  .header {
    position: relative;
    padding: 80px 0 60px;
    text-align: center;
    background: radial-gradient(circle at center, rgba(0,210,255,0.1) 0%, rgba(0,0,0,0) 70%);
    overflow: hidden;
  }
  
  .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: 0.15;
    z-index: -1;
  }
  
  .header h1 {
    font-family: 'Oswald', sans-serif;
    font-size: 3rem;
    text-transform: uppercase;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--accent), var(--neon));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
  }
  
  .header p {
    max-width: 800px;
    margin: 0 auto 30px;
    font-size: 1.2rem;
    color: rgba(224, 224, 224, 0.9);
  }
  
  .reference {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    padding: 10px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    z-index: 100;
    backdrop-filter: blur(5px);
  }
  
  /* Navigation */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    z-index: 1000;
    backdrop-filter: blur(5px);
    transition: var(--transition);
  }
  
  .navbar:hover {
    background: rgba(0, 0, 0, 0.95);
  }
  
  .nav-links {
    display: flex;
    list-style: none;
  }
  
  .nav-links li {
    margin: 0 15px;
  }
  
  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    padding: 5px 0;
    position: relative;
    transition: var(--transition);
  }
  
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
  }
  
  .nav-links a:hover {
    color: var(--accent);
  }
  
  .nav-links a:hover::after {
    width: 100%;
  }
  
  /* Main Content */
  .main-content {
    padding: 40px 0;
  }
  
  article {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  article h2 {
    font-family: 'Oswald', sans-serif;
    font-size: 2rem;
    color: var(--accent);
    margin: 40px 0 20px;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 10px;
  }
  
  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
  }
  
  article h3 {
    font-family: 'Oswald', sans-serif;
    font-size: 1.5rem;
    color: var(--neon);
    margin: 30px 0 15px;
  }
  
  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
  }
  
  /* Code Blocks */
  pre {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: hidden;
    border-left: 4px solid var(--accent);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent);
  }
  
  /* Image Gallery */
  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }
  
  .gallery-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transition: var(--transition);
  }
  
  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,210,255,0.2);
  }
  
  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
  }
  
  .gallery-item:hover img {
    transform: scale(1.05);
  }
  
  /* Blockchain Elements */
  .blockchain-elements {
    position: relative;
    height: 200px;
    margin: 60px 0;
  }
  
  .blockchain-line {
    position: absolute;
    background: var(--accent);
    opacity: 0.7;
    animation: moveLine 4s linear infinite;
  }
  
  @keyframes moveLine {
    0% { height: 50px; opacity: 0.3; }
    50% { height: 150px; opacity: 0.7; }
    100% { height: 50px; opacity: 0.3; }
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .header h1 {
      font-size: 2.2rem;
    }
    
    .header p {
      font-size: 1rem;
    }
    
    .navbar {
      padding: 10px 20px;
    }
    
    .nav-links {
      display: none;
    }
    
    article h2 {
      font-size: 1.6rem;
    }
    
    article h3 {
      font-size: 1.3rem;
    }
  }
  
  /* Neon Effects */
  .neon-text {
    font-family: 'Oswald', sans-serif;
    color: var(--accent);
    text-shadow: 0 0 5px var(--accent), 0 0 10px var(--accent), 0 0 20px var(--accent);
    animation: flicker 1.5s infinite;
  }
  
  @keyframes flicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% {
      text-shadow: 0 0 5px var(--accent), 0 0 10px var(--accent), 0 0 20px var(--accent);
    }
    20%, 24%, 55% {
      text-shadow: none;
    }
  }
  
  /* Card Styles */
  .card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    margin: 30px 0;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border: 1px solid rgba(0,210,255,0.1);
    transition: var(--transition);
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,210,255,0.3);
    border-color: rgba(0,210,255,0.3);
  }
  
  /* Footer */
  .footer {
    background: rgba(0,0,0,0.8);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
  }
  
  .footer p {
    color: rgba(224,224,224,0.7);
    font-size: 0.9rem;
  }