:root {
    --primary: #34C759;
    --secondary: #0A6EBD;
    --accent: #836FFF;
    --neutral: #A9A9A9;
    --dark: #1E0090;
    --light: #F0F0F0;
    --text: #333333;
    --white: #FFFFFF;
  }

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

  body {
    font-family: 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    animation: gradientFlow 15s ease infinite;
    background-attachment: fixed;
    background-size: 400% 400%;
    min-height: 100%;
  }

  @keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

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

  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 110, 189, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }

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

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

  .logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
    border-radius: 50%;
    object-fit: cover;
  }

  nav ul {
    display: flex;
    list-style: none;
  }

  nav ul li {
    margin-left: 30px;
  }

  nav ul li a {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
  }

  nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
  }

  nav ul li a:hover::after {
    width: 100%;
  }

  .hero {
    padding: 180px 0 100px;
    text-align: center;
    color: var(--white);
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  .hero p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 40px;
  }

  .notice {
    background: rgba(255,255,255,0.2);
    padding: 15px;
    border-radius: 8px;
    margin: 40px auto;
    max-width: 800px;
    text-align: center;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .content-section {
    background: var(--white);
    border-radius: 12px;
    padding: 40px;
    margin: 40px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }

  article {
    max-width: 800px;
    margin: 0 auto;
  }

  article h2 {
    font-size: 32px;
    color: var(--secondary);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
  }

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

  article h3 {
    font-size: 24px;
    color: var(--secondary);
    margin: 30px 0 15px;
  }

  article p {
    font-size: 17px;
    margin-bottom: 20px;
    line-height: 1.7;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  }

  table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light);
  }

  table th {
    background: var(--secondary);
    color: var(--white);
    font-weight: 600;
  }

  table tr:nth-child(even) {
    background: rgba(10, 110, 189, 0.05);
  }

  table tr:hover {
    background: rgba(10, 110, 189, 0.1);
  }

  pre {
    background: #2d2d2d;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    color: #f8f8f2;
    font-size: 15px;
    line-height: 1.5;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(10, 110, 189, 0.1);
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--secondary);
  }

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

  .image-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px 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 10px 25px rgba(0,0,0,0.15);
  }

  .image-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

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

  .image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: var(--white);
    padding: 20px;
  }

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

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    margin: 20px 0;
  }

  .footer-links a {
    color: var(--white);
    margin: 0 15px;
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: var(--primary);
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 36px;
    }
    
    .hero p {
      font-size: 18px;
    }
    
    nav ul li {
      margin-left: 15px;
    }
    
    .content-section {
      padding: 30px;
    }
    
    article h2 {
      font-size: 28px;
    }
    
    article h3 {
      font-size: 22px;
    }
  }

  @media (max-width: 576px) {
    .header-content {
      flex-direction: column;
    }
    
    .logo {
      margin-bottom: 15px;
    }
    
    nav ul {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    nav ul li {
      margin: 0 10px 10px;
    }
    
    .hero {
      padding: 150px 0 80px;
    }
    
    .hero h1 {
      font-size: 30px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }