:root {
    --primary: #1E3A8A;
    --secondary: #22C55E;
    --accent: #F59E0B;
    --light: #F9FAFB;
    --dark: #1E1E2E;
    --gray: #6B7280;
    --border: #E5E7EB;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
  }

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

  body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray);
    background: linear-gradient(135deg, var(--primary), var(--light));
    min-height: 100%;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 20px 50px;
  }

  .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: 0 2px 20px rgba(0, 0, 0, 0.15);
    padding: 15px 0;
  }

  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .logo {
    color: var(--light);
    font-size: 1.8rem;
    font-weight: 700;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .logo-icon {
    width: 30px;
    height: 30px;
    fill: var(--accent);
  }

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

  .nav-link {
    color: var(--light);
    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 {
    text-align: center;
    padding: 60px 0;
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
  }

  .hero h1 {
    font-size: 2.5rem;
    color: var(--light);
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .hero p {
    font-size: 1.2rem;
    color: var(--light);
    max-width: 800px;
    margin: 0 auto 30px;
  }

  .notice {
    background: var(--accent);
    color: white;
    padding: 15px;
    border-radius: 8px;
    margin: 30px auto;
    max-width: 600px;
    text-align: center;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
  }

  article {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-bottom: 50px;
  }

  article h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 25px;
    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(--secondary));
    border-radius: 3px;
  }

  article h3 {
    color: var(--primary);
    font-size: 1.5rem;
    margin: 30px 0 15px;
  }

  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.7;
  }

  pre {
    background: #f8f8f8;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow-x: auto;
    border-left: 4px solid var(--secondary);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
  }

  code {
    background: rgba(34, 197, 94, 0.1);
    color: var(--secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 300px;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
  }

  .gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
  }

  .gallery-item:hover .gallery-img {
    transform: scale(1.05);
  }

  .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
  }

  .feature-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
  }

  .feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  }

  .feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    fill: var(--secondary);
  }

  .feature-title {
    color: var(--primary);
    font-size: 1.3rem;
    margin-bottom: 15px;
  }

  .feature-desc {
    color: var(--gray);
    font-size: 1rem;
  }

  .footer {
    text-align: center;
    padding: 30px 0;
    color: var(--light);
    font-size: 0.9rem;
  }

  @media (max-width: 768px) {
    .nav-links {
      gap: 15px;
    }

    .hero h1 {
      font-size: 2rem;
    }

    article {
      padding: 30px 20px;
    }

    .gallery {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    .nav {
      flex-direction: column;
      gap: 15px;
    }

    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }

    .hero {
      padding: 40px 20px;
    }

    .hero h1 {
      font-size: 1.8rem;
    }
  }