:root {
    --primary: #001f3f;
    --secondary: #00BFFF;
    --accent: #FFA500;
    --text: #FFFFFF;
    --bg-dark: #001a35;
    --bg-light: #002f5d;
  }

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

  body {
    font-family: 'Roboto', 'Open Sans', sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: linear-gradient(135deg, var(--bg-dark) 25%, var(--bg-light) 25%, var(--bg-light) 50%, var(--bg-dark) 50%, var(--bg-dark) 75%, var(--bg-light) 75%, var(--bg-light) 100%);
    background-size: 56.57px 56.57px;
    animation: backgroundMove 10s linear infinite;
    padding-top: 80px;
  }

  @keyframes backgroundMove {
    from { background-position: 0 0; }
    to { background-position: 56.57px 56.57px; }
  }

  .header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 31, 63, 0.9);
    padding: 15px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
  }

  .header.scrolled {
    background: var(--primary);
  }

  .logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(45deg, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

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

  .nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: all 0.3s ease;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

  .nav-links a:hover::after {
    width: 100%;
  }

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

  .hero {
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0,31,63,0.7) 0%, rgba(0,31,63,0.9) 100%);
    z-index: -1;
  }

  .hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: fadeIn 1s ease-out;
  }

  .hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 30px;
    animation: fadeIn 1.5s ease-out;
  }

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

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 30px auto;
    max-width: 800px;
    text-align: center;
    border-left: 4px solid var(--accent);
  }

  article {
    background: rgba(0, 31, 63, 0.8);
    border-radius: 15px;
    padding: 40px;
    margin: 50px auto;
    max-width: 1000px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  article h2 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    color: var(--secondary);
    position: relative;
    padding-bottom: 10px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    line-height: 1.8;
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--secondary);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .image-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

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

  .image-card:hover img {
    transform: scale(1.1);
  }

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,31,63,0.8) 0%, transparent 50%);
  }

  .footer {
    background: var(--primary);
    padding: 40px 0;
    text-align: center;
    margin-top: 80px;
  }

  .footer p {
    margin-bottom: 15px;
  }

  .social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
  }

  .social-links a {
    color: var(--text);
    font-size: 1.5rem;
    transition: all 0.3s ease;
  }

  .social-links a:hover {
    color: var(--accent);
    transform: translateY(-5px);
  }

  @media (max-width: 768px) {
    .header {
      padding: 15px 20px;
    }

    .nav-links {
      display: none;
    }

    .hero h1 {
      font-size: 2.5rem;
    }

    article {
      padding: 30px 20px;
    }

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

  @media (min-width: 769px) and (max-width: 1024px) {
    .hero h1 {
      font-size: 3rem;
    }
  }