:root {
    --primary-dark: #0f2027;
    --primary-mid: #203a43;
    --primary-light: #2c5364;
    --accent-neon: #00ffff;
    --accent-purple: #8a2be2;
    --text-light: rgba(255,255,255,0.9);
    --text-muted: rgba(255,255,255,0.7);
    --card-bg: rgba(255,255,255,0.1);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  }

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

  body {
    background: radial-gradient(ellipse at center, var(--primary-dark), var(--primary-mid));
    color: var(--text-light);
    font-family: 'Montserrat', 'Segoe UI', sans-serif;
    line-height: 1.8;
    font-size: 17px;
    overflow-x: hidden;
    min-height: 100%;
  }

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

  /* Header Styles */
  .hero {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 0 20px;
  }

  .hero::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;
    filter: blur(1px);
  }

  .hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
  }

  .hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--accent-neon), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
  }

  .hero p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    color: var(--text-muted);
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 14px;
    z-index: 1000;
  }

  /* Navigation */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(90deg, rgba(15,32,39,0.9), rgba(32,58,67,0.9));
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 30px rgba(0,0,0,0.3);
  }

  .nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-neon);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-neon);
    transition: var(--transition);
  }

  .nav-links a:hover {
    color: var(--accent-neon);
  }

  .nav-links a:hover::after {
    width: 100%;
  }

  /* Article Content */
  article {
    padding: 100px 0;
    max-width: 900px;
    margin: 0 auto;
  }

  article h2 {
    font-size: 2.2rem;
    margin: 50px 0 25px;
    color: var(--accent-neon);
    position: relative;
    padding-left: 20px;
  }

  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 80%;
    width: 5px;
    background: linear-gradient(to bottom, var(--accent-neon), var(--accent-purple));
    border-radius: 5px;
  }

  article h3 {
    font-size: 1.6rem;
    margin: 40px 0 20px;
    color: var(--text-light);
  }

  article p {
    margin-bottom: 25px;
    color: var(--text-muted);
  }

  /* Code Blocks */
  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
    border-left: 3px solid var(--accent-neon);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }

  code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
  }

  /* Image Gallery */
  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
    transition: var(--transition);
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 40px rgba(0,0,0,0.4);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
  }

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

  /* Cards */
  .card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.4);
    border-color: rgba(0,255,255,0.3);
  }

  .card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--accent-neon);
  }

  /* Buttons */
  .btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(45deg, var(--primary-mid), var(--primary-light));
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    margin: 10px 0;
  }

  .btn:hover {
    background: linear-gradient(45deg, var(--primary-light), var(--primary-mid));
    box-shadow: 0 10px 25px rgba(0,255,255,0.3);
    transform: translateY(-3px);
  }

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

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

  /* Responsive */
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.5rem;
    }
    
    .hero p {
      font-size: 1.1rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 80px 20px;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.4rem;
    }
  }

  @media (max-width: 480px) {
    .hero {
      height: 70vh;
    }
    
    .hero h1 {
      font-size: 2rem;
    }
    
    .nav-links {
      display: none;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }