@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
  
  :root {
    --primary-dark: #0D1B2A;
    --primary-dark-2: #1B263B;
    --primary-dark-3: #415A77;
    --accent-blue: #00C6FF;
    --accent-blue-2: #0072FF;
    --accent-green: #00FF85;
    --text-light: #E0E1DD;
    --text-gray: #778DA9;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background-color: var(--primary-dark);
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* Header Styles */
  .header {
    position: relative;
    height: 80vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-dark-3) 100%);
  }
  
  .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: 40px;
    max-width: 800px;
  }
  
  .header-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 198, 255, 0.3);
  }
  
  .header-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 30px;
  }
  
  .notice-banner {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 198, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 15px 25px;
    border-radius: 30px;
    border: 1px solid rgba(0, 198, 255, 0.3);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    animation: float 6s ease-in-out infinite;
  }
  
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
  
  /* Navigation */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(13, 27, 42, 0.9);
    padding: 15px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(65, 90, 119, 0.3);
  }
  
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
  }
  
  .nav-logo span {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
  }
  
  .nav-item {
    position: relative;
  }
  
  .nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
  }
  
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    transition: width 0.3s ease;
  }
  
  .nav-link:hover::after {
    width: 100%;
  }
  
  .nav-link:hover {
    color: var(--accent-blue);
  }
  
  /* Main Content */
  .main-content {
    padding: 100px 0;
    position: relative;
  }
  
  .content-section {
    margin-bottom: 80px;
    position: relative;
  }
  
  .section-header {
    margin-bottom: 40px;
    text-align: center;
  }
  
  .section-title {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
  }
  
  .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  }
  
  .section-subtitle {
    color: var(--text-gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
  }
  
  /* Article Styles */
  article {
    background-color: var(--primary-dark-2);
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-bottom: 60px;
  }
  
  article h2 {
    font-size: 2rem;
    margin: 30px 0 20px;
    color: var(--accent-blue);
    position: relative;
    padding-left: 20px;
  }
  
  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 70%;
    background: linear-gradient(to bottom, var(--accent-blue), var(--accent-green));
    border-radius: 5px;
  }
  
  article h3 {
    font-size: 1.5rem;
    margin: 25px 0 15px;
    color: var(--text-light);
  }
  
  article p {
    margin-bottom: 20px;
    color: var(--text-gray);
    line-height: 1.8;
  }
  
  article strong {
    color: var(--text-light);
    font-weight: 600;
  }
  
  /* Code Block Styles */
  pre {
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--accent-blue);
  }
  
  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-green);
  }
  
  /* 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 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 198, 255, 0.3);
  }
  
  .gallery-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
  }
  
  .gallery-item:hover .gallery-img {
    transform: scale(1.1);
  }
  
  /* Footer */
  .footer {
    background-color: var(--primary-dark-2);
    padding: 60px 0 30px;
    text-align: center;
    position: relative;
  }
  
  .footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  }
  
  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: inline-block;
  }
  
  .footer-logo span {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
  }
  
  .footer-link {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  .footer-link:hover {
    color: var(--accent-blue);
  }
  
  .footer-copyright {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-top: 30px;
  }
  
  /* Responsive Adjustments */
  @media (max-width: 992px) {
    .header-title {
      font-size: 2.8rem;
    }
    
    .nav-menu {
      gap: 20px;
    }
  }
  
  @media (max-width: 768px) {
    .header {
      height: 70vh;
    }
    
    .header-title {
      font-size: 2.2rem;
    }
    
    .header-subtitle {
      font-size: 1rem;
    }
    
    .nav-menu {
      display: none;
    }
    
    article {
      padding: 30px;
    }
    
    .section-title {
      font-size: 2rem;
    }
  }
  
  @media (max-width: 576px) {
    .header-title {
      font-size: 1.8rem;
    }
    
    .header-content {
      padding: 20px;
    }
    
    article {
      padding: 20px;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }
  
  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .fade-in {
    animation: fadeIn 1s ease-out forwards;
  }
  
  .delay-1 { animation-delay: 0.2s; }
  .delay-2 { animation-delay: 0.4s; }
  .delay-3 { animation-delay: 0.6s; }
  
  /* Scroll Indicator */
  .scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-light);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.7;
    transition: opacity 0.3s ease;
  }
  
  .scroll-indicator:hover {
    opacity: 1;
  }
  
  .scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--text-light);
    border-radius: 10px;
    margin-top: 10px;
    position: relative;
  }
  
  .scroll-arrow::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--text-light);
    border-radius: 2px;
    animation: scrollDown 2s infinite;
  }
  
  @keyframes scrollDown {
    0%, 100% { top: 5px; opacity: 1; }
    50% { top: 12px; opacity: 0.5; }
  }