:root {
    --primary: #0F4C81;
    --secondary: #E5E5E5;
    --accent: #03A9F4;
    --highlight: #67E6DC;
    --text: #333333;
    --light: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  }

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

  body {
    background: linear-gradient(145deg, #f5f7fa, #e4e8ed);
    color: var(--text);
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--primary), #1a5f9a);
    color: var(--light);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: var(--shadow);
  }

  .header h1 {
    font-size: 1.5rem;
    font-weight: 500;
    background: linear-gradient(to right, var(--highlight), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .notice {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary);
    padding: 0.8rem;
    text-align: center;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 5%;
  }

  .hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
  }

  .hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    line-height: 1.2;
  }

  .hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text);
  }

  .hero-image {
    position: relative;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .hero-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: perspective(1000px) rotateY(-10deg);
    transition: all 0.5s ease;
  }

  .hero-image:hover img {
    transform: perspective(1000px) rotateY(0deg);
  }

  article {
    background: var(--light);
    border-radius: 16px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
  }

  article h2 {
    color: var(--primary);
    margin-bottom: 2rem;
    font-size: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--accent), var(--highlight));
    border-radius: 2px;
  }

  article h3 {
    color: var(--primary);
    margin: 2rem 0 1rem;
    font-size: 1.5rem;
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
  }

  pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
    overflow: auto;
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
  }

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

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

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }

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

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

  .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    padding: 1.5rem 1rem 1rem;
  }

  .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .feature-card {
    background: var(--light);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border-top: 4px solid var(--accent);
  }

  .feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }

  .feature-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
  }

  .feature-card h3::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--highlight);
    border-radius: 50%;
    margin-right: 0.8rem;
  }

  .footer {
    background: linear-gradient(135deg, var(--primary), #1a5f9a);
    color: var(--light);
    padding: 3rem 5%;
    text-align: center;
    margin-top: 3rem;
  }

  .footer p {
    margin-bottom: 1rem;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
  }

  .footer-links a {
    color: var(--highlight);
    text-decoration: none;
    transition: color 0.3s ease;
  }

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

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

    .hero-image {
      order: -1;
    }

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

    article {
      padding: 2rem;
    }
  }

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

  .fade-in {
    animation: fadeIn 0.8s ease-out forwards;
  }

  .delay-1 { animation-delay: 0.2s; }
  .delay-2 { animation-delay: 0.4s; }
  .delay-3 { animation-delay: 0.6s; }

  /* Scroll indicator */
  .scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: linear-gradient(to right, var(--accent), var(--highlight));
    z-index: 1000;
    transition: width 0.1s ease;
  }