:root {
    --primary: #1E3A8A;
    --secondary: #3B82F6;
    --accent: #F97316;
    --light: #F3F4F6;
    --dark: #1F2937;
    --text: #374151;
    --white: #FFFFFF;
    --gold: #F59E0B;
    --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', 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, var(--light) 0%, var(--white) 100%);
    overflow-x: hidden;
  }

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

  /* Header Styles */
  .header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
    margin-bottom: 3rem;
  }

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

  .header-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-height: 300px;
  }

  .header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--white) 30%, var(--gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

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

  .notice {
    background: rgba(255,255,255,0.2);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 2rem;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.3);
  }

  /* Navigation */
  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
  }

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

  .nav-link {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
  }

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

  /* Article Styles */
  article {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    padding: 3rem;
    margin-bottom: 3rem;
  }

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

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--gold) 100%);
    border-radius: 2px;
  }

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

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

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

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

  .language-css {
    color: #7FDBFF;
  }

  /* Tables */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-radius: 8px;
    overflow: hidden;
  }

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

  th {
    background: var(--primary);
    color: var(--white);
  }

  tr:nth-child(even) {
    background: rgba(59, 130, 246, 0.05);
  }

  /* 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 20px rgba(0,0,0,0.1);
    transition: var(--transition);
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
  }

  .gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
  }

  .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: var(--white);
    padding: 1rem;
    opacity: 0;
    transition: var(--transition);
  }

  .gallery-item:hover .gallery-caption {
    opacity: 1;
  }

  /* Callout Boxes */
  .callout {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-left: 4px solid var(--secondary);
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
    margin: 2rem 0;
  }

  /* Responsive Adjustments */
  @media (max-width: 768px) {
    .header h1 {
      font-size: 2rem;
    }
    
    article {
      padding: 2rem;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
  }

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

  .floating {
    animation: float 3s ease-in-out infinite;
  }