@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700&family=Roboto:wght@400;500;700&display=swap');
  
  :root {
    --primary-gradient: linear-gradient(135deg, #4A90E2, #9013FE);
    --secondary-gradient: linear-gradient(45deg, #FFA500, #FF7F50);
    --accent-color: #FF7F50;
    --text-dark: #333333;
    --text-light: #FFFFFF;
    --bg-light: #F5F5F5;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --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;
    color: var(--text-dark);
    background-color: #FAFAFA;
    overflow-x: hidden;
    min-width: 320px;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* Header Styles */
  .hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    color: var(--text-light);
    text-align: center;
    overflow: hidden;
    margin-bottom: 60px;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-lg);
  }
  
  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') no-repeat center/cover;
    opacity: 0.15;
  }
  
  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 40px;
  }
  
  .hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }
  
  .hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }
  
  .notice {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 20px;
    border-radius: 30px;
    box-shadow: var(--shadow-sm);
    font-size: 0.9rem;
    z-index: 1000;
    backdrop-filter: blur(5px);
  }
  
  /* Navigation */
  .nav-container {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(5px);
  }
  
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .nav-links {
    display: flex;
    gap: 25px;
  }
  
  .nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
  }
  
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
  }
  
  .nav-links a:hover::after {
    width: 100%;
  }
  
  /* Article Styles */
  article {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    margin-bottom: 60px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
  }
  
  article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--primary-gradient);
  }
  
  article h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: #4A90E2;
    position: relative;
  }
  
  article h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--secondary-gradient);
  }
  
  article h3 {
    font-size: 1.6rem;
    margin: 30px 0 20px;
    color: #9013FE;
  }
  
  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.7;
  }
  
  /* Code Blocks */
  pre {
    background: #282C34;
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    box-shadow: var(--shadow-sm);
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    color: #ABB2BF;
    font-size: 0.9rem;
  }
  
  /* Table Styles */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: var(--shadow-sm);
    border-radius: var(--border-radius);
    overflow: hidden;
  }
  
  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #E0E0E0;
  }
  
  th {
    background: var(--primary-gradient);
    color: white;
    font-weight: 500;
  }
  
  tr:nth-child(even) {
    background-color: #F9F9F9;
  }
  
  tr:hover {
    background-color: #F0F0F0;
  }
  
  /* Image Gallery */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }
  
  .gallery-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
  }
  
  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
  }
  
  .gallery img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
  }
  
  .gallery-item:hover img {
    transform: scale(1.05);
  }
  
  /* Cards */
  .card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }
  
  .card {
    background: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #F0F0F0;
  }
  
  .card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: #E0E0E0;
  }
  
  .card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #4A90E2;
  }
  
  .card p {
    font-size: 0.95rem;
    color: #666;
  }
  
  /* Responsive Adjustments */
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.2rem;
    }
    
    .hero p {
      font-size: 1rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 30px 20px;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.4rem;
    }
  }
  
  @media (max-width: 480px) {
    .hero {
      height: 400px;
    }
    
    .hero-content {
      padding: 20px;
    }
    
    .nav-container {
      padding: 10px 0;
    }
    
    .nav-links {
      display: none;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
  }
  
  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
  
  .floating {
    animation: float 3s ease-in-out infinite;
  }
  
  /* Utility Classes */
  .btn {
    display: inline-block;
    padding: 12px 25px;
    background: var(--secondary-gradient);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
  }
  
  .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
  }
  
  .text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #4A90E2, transparent);
    margin: 60px 0;
    border: none;
  }