:root {
    --primary-dark: #1E2B38;
    --primary-black: #000000;
    --accent-orange: #FFA500;
    --accent-cyan: #00FFFF;
    --text-light: #FFFFFF;
    --card-bg: rgba(30, 43, 56, 0.8);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @font-face {
    font-family: 'Roboto';
    src: local('Roboto Bold'), local('Roboto-Bold');
    font-weight: 700;
  }

  @font-face {
    font-family: 'Montserrat';
    src: local('Montserrat Regular'), local('Montserrat-Regular');
    font-weight: 400;
  }

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

  body {
    font-family: 'Montserrat', sans-serif;
    color: var(--text-light);
    background: var(--primary-dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  /* Header Styles */
  .header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-black));
    padding: 2rem 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/sample1.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 3rem 0;
  }

  .header h1 {
    font-family: 'Roboto', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .header p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 800px;
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, 0.9);
  }

  .notice {
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 2rem;
    font-size: 0.9rem;
    border: 1px solid var(--accent-cyan);
  }

  /* Navigation */
  .nav-container {
    background: rgba(30, 43, 56, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
  }

  .nav-links {
    display: flex;
    gap: 2rem;
  }

  .nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
  }

  .nav-link:hover {
    color: var(--accent-cyan);
  }

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

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

  /* Main Content */
  .main-content {
    padding: 4rem 0;
  }

  .article-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
  }

  .article-container::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: url('https://images.gptkong.com/demo/sample2.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
  }

  article h2 {
    font-family: 'Roboto', sans-serif;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: 1.5rem;
    color: var(--accent-cyan);
    position: relative;
    padding-bottom: 0.5rem;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
    border-radius: 3px;
  }

  article h3 {
    font-family: 'Roboto', sans-serif;
    font-size: clamp(1.5rem, 2.5vw, 1.75rem);
    margin: 2rem 0 1rem;
    color: var(--accent-orange);
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
  }

  article strong {
    color: var(--accent-cyan);
  }

  /* Tables */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    overflow: hidden;
  }

  thead {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary-black));
  }

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

  th {
    font-family: 'Roboto', sans-serif;
    color: var(--accent-orange);
  }

  /* Code Blocks */
  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 1rem 0;
    border-left: 4px solid var(--accent-cyan);
  }

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

  /* Image Gallery */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
  }

  .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
  }

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

  /* Footer */
  .footer {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-black));
    padding: 3rem 0;
    text-align: center;
    position: relative;
  }

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

  .footer-content {
    position: relative;
    z-index: 1;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .footer-link {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
  }

  .footer-link:hover {
    color: var(--accent-cyan);
  }

  /* Responsive */
  @media (max-width: 768px) {
    .nav {
      flex-direction: column;
      padding: 1rem;
    }

    .nav-links {
      margin-top: 1rem;
      flex-wrap: wrap;
      justify-content: center;
    }

    .article-container {
      padding: 2rem 1.5rem;
    }

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

  /* 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; }
  }

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