:root {
    --primary: #1E3A8A;
    --secondary: #6B21A8;
    --accent: #10B981;
    --highlight: #F97316;
    --text: #2D3748;
    --light: #F7FAFC;
    --dark: #1A202C;
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
  }

  body {
    background: linear-gradient(135deg, #F7FAFC, #EDF2F7);
    color: var(--text);
    line-height: 1.6;
    padding: 0;
    margin: 0;
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 2rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(255,255,255,0.1) 0%, transparent 70%);
  }

  .header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    opacity: 0.9;
  }

  .notice {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 800px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-left: 4px solid var(--accent);
    font-size: 0.9rem;
  }

  article {
    background: white;
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    margin-bottom: 3rem;
  }

  article h2 {
    color: var(--primary);
    margin: 2rem 0 1.5rem;
    font-size: 1.8rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    border-radius: 3px;
  }

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

  pre {
    background: #1E293B;
    color: #F8FAFC;
    padding: 1.5rem;
    border-radius: 8px;
    overflow: auto;
    margin: 2rem 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  }

  code {
    font-family: 'Fira Code', monospace;
    background: #EDF2F7;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #1E40AF;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .image-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .image-card:hover img {
    transform: scale(1.05);
  }

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .image-card:hover::after {
    opacity: 1;
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    background: white;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
  }

  .nav-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
  }

  .footer {
    text-align: center;
    padding: 2rem;
    color: var(--text);
    font-size: 0.9rem;
    opacity: 0.8;
  }

  @media (max-width: 768px) {
    .container {
      padding: 1rem;
    }
    
    article {
      padding: 2rem 1.5rem;
    }
    
    .header h1 {
      font-size: 2rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

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