:root {
    --primary-color: #A0522D;
    --secondary-color: #556B2F;
    --accent-color: #FFD700;
    --highlight-color: #00FFFF;
    --background-color: #F5F5DC;
    --text-color: #333;
    --card-bg: rgba(255, 255, 255, 0.9);
  }

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

  body {
    font-family: 'Roboto', 'Helvetica', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--background-color);
    background-image: 
      radial-gradient(circle at 10% 20%, rgba(255, 215, 0, 0.1) 0%, transparent 20%),
      radial-gradient(circle at 90% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 20%);
    padding-top: 80px;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .header h1 {
    font-family: 'Pacifico', cursive;
    font-size: 1.8rem;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  }

  .notice {
    background: var(--accent-color);
    color: #333;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: bold;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: center;
  }

  .hero-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
  }

  .hero-image:hover {
    transform: scale(1.02);
  }

  .hero-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    position: relative;
  }

  .hero-content h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
  }

  .hero-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
  }

  article {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 3rem;
  }

  article h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    position: relative;
    padding-bottom: 0.5rem;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
  }

  article h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: var(--secondary-color);
  }

  article p {
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
  }

  pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent-color);
    color: #333;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    border-bottom-right-radius: 4px;
    font-weight: bold;
  }

  code {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .gallery-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  }

  .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

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

  .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.8rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
  }

  .gallery-item:hover .gallery-caption {
    transform: translateY(0);
  }

  .nav-links {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
    flex-wrap: wrap;
  }

  .nav-link {
    background: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    margin: 0.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  }

  .nav-link:hover {
    background: var(--accent-color);
    color: #333;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  }

  .footer {
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
  }

  @media (max-width: 768px) {
    .hero {
      grid-template-columns: 1fr;
    }

    .hero-content h2 {
      font-size: 2rem;
    }

    article {
      padding: 1.5rem;
    }

    .gallery {
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
  }

  @media (max-width: 480px) {
    .header h1 {
      font-size: 1.5rem;
    }

    .notice {
      font-size: 0.8rem;
    }

    .hero-content h2 {
      font-size: 1.8rem;
    }

    article h2 {
      font-size: 1.6rem;
    }

    article h3 {
      font-size: 1.3rem;
    }
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
  }

  .pulse {
    animation: pulse 2s infinite;
  }