:root {
    --primary: #1A73E8;
    --secondary: #34C759;
    --accent: #FFAB40;
    --light: #f5f5f5;
    --dark: #333;
    --gray: #D1D1D1;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
  }

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

  body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .banner {
    position: relative;
    height: 80vh;
    min-height: 600px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  .banner::before {
    content: '';
    position: absolute;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 60s linear infinite;
  }

  @keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    max-width: 800px;
  }

  .banner h1 {
    font-size: 3.5rem;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    animation: fadeIn 1s ease-out;
  }

  .banner p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 30px;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 15px 25px;
    border-radius: 50px;
    box-shadow: var(--shadow);
    z-index: 1000;
    font-size: 0.9rem;
    animation: slideIn 0.5s ease-out;
  }

  @keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
  }

  article {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
  }

  article h2 {
    color: var(--primary);
    font-size: 2rem;
    margin: 30px 0 20px;
    position: relative;
    padding-bottom: 10px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 2px;
  }

  article h3 {
    color: var(--secondary);
    font-size: 1.5rem;
    margin: 25px 0 15px;
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #555;
  }

  pre {
    background: #f8f8f8;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--primary);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #333;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
  }

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

  .nav-links {
    display: flex;
    justify-content: center;
    margin: 30px 0;
    flex-wrap: wrap;
  }

  .nav-link {
    margin: 0 15px;
    padding: 10px 20px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .nav-link:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(26, 115, 232, 0.4);
  }

  @media (max-width: 768px) {
    .banner h1 {
      font-size: 2.5rem;
    }
    
    article {
      padding: 30px 20px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }