:root {
    --primary: #1E2A4F;
    --secondary: #6D79C7;
    --accent: #FFA03B;
    --light: #F5F7FF;
    --dark: #0A1020;
  }

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

  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, var(--light), #E6E9F5);
    min-height: 100%;
    overflow-x: hidden;
  }

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

  .header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
  }

  .header::after {
    content: "";
    display: block;
    width: 150px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    margin: 1rem auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-weight: 600;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  h2 {
    font-size: 1.8rem;
    position: relative;
    padding-left: 1rem;
  }

  h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--accent);
    border-radius: 2px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--secondary);
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--dark);
  }

  strong {
    color: var(--primary);
  }

  .article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .article-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(30, 42, 79, 0.1);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .article-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(30, 42, 79, 0.15);
  }

  .article-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
  }

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

  .image-card {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
  }

  .image-card:hover {
    transform: scale(1.03);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
  }

  pre {
    background: var(--dark);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: "CSS";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: white;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 0 0 0 8px;
  }

  code {
    font-family: 'Courier New', Courier, monospace;
    background: rgba(109, 121, 199, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  .notice {
    background: rgba(255, 160, 59, 0.1);
    border-left: 4px solid var(--accent);
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
  }

  .notice p {
    margin: 0;
    color: var(--primary);
  }

  @media (max-width: 768px) {
    .container {
      padding: 1rem;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .article-section {
      padding: 1.5rem;
    }
  }

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

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