:root {
    --primary: #1E3A8A;
    --secondary: #3B82F6;
    --accent: #F59E0B;
    --text: #1F2937;
    --light: #F3F4F6;
    --dark: #111827;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

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

  body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 100%);
    padding-top: 80px;
  }

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

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(30, 58, 138, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow);
    padding: 15px 0;
  }

  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
  }

  .logo-icon {
    margin-right: 10px;
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: flex;
    gap: 30px;
  }

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

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

  .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%;
  }

  .hero {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-radius: 0 0 var(--radius) var(--radius);
    margin-bottom: 60px;
  }

  .hero-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 20px;
    color: var(--dark);
    max-width: 800px;
    margin: 0 auto 40px;
  }

  .notice {
    background: white;
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    text-align: center;
    font-weight: 500;
    color: var(--primary);
    border-left: 4px solid var(--accent);
  }

  .content-section {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
  }

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

  .content-title {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary);
    position: relative;
    display: inline-block;
  }

  .content-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  .content-subtitle {
    font-size: 24px;
    margin: 30px 0 20px;
    color: var(--secondary);
  }

  .content-text {
    margin-bottom: 20px;
    font-size: 17px;
    line-height: 1.7;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .image-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius);
  }

  pre {
    background: #1E1E1E;
    color: #D4D4D4;
    padding: 20px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 25px 0;
    font-family: 'Fira Code', monospace;
    font-size: 15px;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
  }

  code {
    font-family: 'Fira Code', monospace;
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 90%;
  }

  ol {
    margin-left: 20px;
    margin-bottom: 20px;
  }

  ol li {
    margin-bottom: 15px;
  }

  .footer {
    background: var(--dark);
    color: white;
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
  }

  .footer-text {
    opacity: 0.8;
    font-size: 14px;
  }

  @media (max-width: 768px) {
    .hero-title {
      font-size: 36px;
    }
    
    .hero-subtitle {
      font-size: 18px;
    }
    
    .content-section {
      padding: 30px;
    }
    
    .content-title {
      font-size: 28px;
    }
    
    .nav {
      gap: 15px;
    }
  }

  @media (max-width: 480px) {
    .hero-title {
      font-size: 28px;
    }
    
    .hero {
      padding: 60px 0;
    }
    
    .content-section {
      padding: 20px;
    }
    
    .content-title {
      font-size: 24px;
    }
    
    .nav {
      display: none;
    }
  }

  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .content-section {
    animation: fadeIn 0.6s ease-out forwards;
  }

  .image-card {
    animation: fadeIn 0.6s ease-out forwards;
    animation-delay: calc(var(--order) * 0.1s);
  }