@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  
  :root {
    --primary: linear-gradient(135deg, #6B73FF 0%, #000DFF 100%);
    --secondary: #2A2F45;
    --accent: #00FFD1;
    --light: #F5F7FF;
    --dark: #1A1D2E;
    --text: #333333;
    --text-light: #FFFFFF;
    --card-bg: rgba(255, 255, 255, 0.95);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    letter-spacing: 0.5px;
    color: var(--text);
    background-color: var(--light);
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* Header Styles */
  .header {
    background: var(--primary);
    color: var(--text-light);
    padding: 60px 0 100px;
    position: relative;
    overflow: hidden;
    text-align: center;
  }
  
  .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;
    max-width: 800px;
    margin: 0 auto;
  }
  
  .header h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  }
  
  .header p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }
  
  .notice {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 8px;
    margin-top: 30px;
    display: inline-block;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  /* Navigation */
  .nav-container {
    background: var(--secondary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }
  
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
  }
  
  .nav-links {
    display: flex;
    gap: 30px;
  }
  
  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }
  
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
  }
  
  .nav-links a:hover::after {
    width: 100%;
  }
  
  /* Main Content */
  .main-content {
    padding: 60px 0;
  }
  
  .article-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 40px;
    margin-bottom: 60px;
    transform: translateY(0);
    transition: var(--transition);
  }
  
  .article-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  }
  
  .article-container h2 {
    font-size: 2rem;
    margin-bottom: 25px;
    color: var(--secondary);
    position: relative;
    padding-bottom: 10px;
  }
  
  .article-container h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary);
  }
  
  .article-container h3 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: var(--secondary);
  }
  
  .article-container p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
  }
  
  .article-container strong {
    color: var(--secondary);
  }
  
  .article-container span {
    background: linear-gradient(90deg, #6B73FF, #000DFF);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 500;
  }
  
  /* Code Blocks */
  pre {
    background: var(--dark);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    color: #f8f8f2;
    font-size: 0.9rem;
    line-height: 1.5;
  }
  
  /* Image Gallery */
  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }
  
  .gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
  }
  
  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }
  
  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: var(--transition);
  }
  
  .gallery-item:hover img {
    transform: scale(1.05);
  }
  
  /* Footer */
  footer {
    background: var(--secondary);
    color: var(--text-light);
    padding: 40px 0;
    text-align: center;
  }
  
  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
  }
  
  .footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
  }
  
  .footer-links a:hover {
    color: var(--accent);
  }
  
  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
  
  .floating {
    animation: float 6s ease-in-out infinite;
  }
  
  /* Responsive Design */
  @media (max-width: 992px) {
    .header h1 {
      font-size: 2.2rem;
    }
    
    .nav-links {
      gap: 20px;
    }
  }
  
  @media (max-width: 768px) {
    .header {
      padding: 40px 0 80px;
    }
    
    .header h1 {
      font-size: 1.8rem;
    }
    
    .nav-container {
      padding: 0 20px;
    }
    
    nav {
      flex-direction: column;
      gap: 15px;
    }
    
    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .article-container {
      padding: 30px;
    }
  }
  
  @media (max-width: 576px) {
    .header h1 {
      font-size: 1.5rem;
    }
    
    .header p {
      font-size: 1rem;
    }
    
    .article-container {
      padding: 20px;
    }
    
    .article-container h2 {
      font-size: 1.5rem;
    }
    
    .article-container h3 {
      font-size: 1.2rem;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }