:root {
    --primary: #0E1E43;
    --secondary: #F2F2F2;
    --accent: #FFC107;
    --text: #333333;
    --light: #FFFFFF;
    --dark: #111111;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Lato', 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, var(--secondary) 0%, #E6E6E6 100%);
    padding: 0;
    margin: 0;
    min-height: 100%;
    overflow-x: hidden;
  }

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

  /* Header Styles */
  header {
    background: linear-gradient(90deg, var(--primary) 0%, #1A2E5A 100%);
    color: var(--light);
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat;
    background-size: 40%;
    background-position: right center;
    opacity: 0.1;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 0 2rem;
  }

  .header-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--light) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }

  .header-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    opacity: 0.9;
  }

  .notice {
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem 0;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  /* Navigation */
  .navbar {
    position: sticky;
    top: 0;
    background: rgba(14, 30, 67, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

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

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

  .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::after {
    width: 100%;
  }

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

  /* Main Content */
  main {
    padding: 3rem 0;
  }

  .article-container {
    background: var(--light);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 3rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
  }

  .article-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
  }

  h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--primary);
    margin: 2rem 0 1rem;
  }

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

  /* Code Blocks */
  pre {
    background: #1E1E1E;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow-x: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent);
    color: var(--dark);
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    font-weight: bold;
    border-radius: 0 0 4px 0;
  }

  code {
    font-family: 'Fira Code', monospace;
    color: #E0E0E0;
    font-size: 0.9rem;
  }

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

  .gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
  }

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

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

  .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--light);
    padding: 1.5rem;
  }

  /* Cards Section */
  .cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .card {
    background: var(--light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

  .card-img {
    height: 200px;
    overflow: hidden;
  }

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

  .card:hover .card-img img {
    transform: scale(1.1);
  }

  .card-content {
    padding: 1.5rem;
  }

  .card-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
  }

  .card-desc {
    color: #666;
    margin-bottom: 1rem;
  }

  .card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .tag {
    background: rgba(14, 30, 67, 0.1);
    color: var(--primary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  .floating {
    animation: float 4s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  .pulsing {
    animation: pulse 2s ease-in-out infinite;
  }

  /* Footer */
  footer {
    background: var(--primary);
    color: var(--light);
    padding: 3rem 0;
    text-align: center;
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0;
  }

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

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

  .copyright {
    opacity: 0.7;
    font-size: 0.9rem;
  }

  /* Responsive */
  @media (max-width: 992px) {
    .header-title {
      font-size: 2rem;
    }
    
    .article-container {
      padding: 2rem;
    }
  }

  @media (max-width: 768px) {
    .nav-container {
      flex-direction: column;
      gap: 1rem;
    }
    
    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .header-content {
      align-items: center;
      text-align: center;
    }
    
    .article-container {
      padding: 1.5rem;
    }
  }

  @media (max-width: 576px) {
    h2 {
      font-size: 1.5rem;
    }
    
    h3 {
      font-size: 1.2rem;
    }
    
    .cards-container {
      grid-template-columns: 1fr;
    }
  }