:root {
    --primary: linear-gradient(135deg, #4C6EF5, #9A5DD7);
    --secondary: #2C2C2C;
    --accent: #FFA726;
    --success: #3FCB8E;
    --text: #333;
    --light: #f5f5f5;
    --spacing: 2rem;
    --radius: 12px;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--light);
    overflow-x: hidden;
    padding-bottom: 5rem;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
  }

  header {
    background: var(--primary);
    color: white;
    padding: 1.5rem 0;
    position: relative;
    overflow: hidden;
  }

  header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
  }

  @keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .header-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 3rem 0;
  }

  .header-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  .header-content p {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
    opacity: 0.9;
  }

  .notice {
    background: white;
    color: var(--secondary);
    padding: 1rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-width: 600px;
    margin: 2rem auto;
    text-align: center;
    font-weight: bold;
  }

  article {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 3rem;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
  }

  article::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.1;
    z-index: 0;
  }

  article > * {
    position: relative;
    z-index: 1;
  }

  h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #4C6EF5;
    background: linear-gradient(to right, #4C6EF5, #9A5DD7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

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

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

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

  .image-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

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

  .image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
  }

  pre {
    background: #f8f9fa;
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 2rem 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    position: relative;
    border-left: 4px solid #4C6EF5;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: #4C6EF5;
    color: white;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    border-bottom-left-radius: var(--radius);
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(76, 110, 245, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    padding: 0.8rem 1.5rem;
    background: white;
    border-radius: 30px;
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: var(--transition);
  }

  .nav-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
  }

  .abstract-shape {
    position: absolute;
    width: 100px;
    height: 100px;
    background: rgba(76, 110, 245, 0.05);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    z-index: 0;
  }

  .shape-1 {
    top: 20%;
    left: 10%;
  }

  .shape-2 {
    bottom: 15%;
    right: 10%;
    animation-delay: 2s;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }

  @media (max-width: 768px) {
    .container {
      padding: 0 1rem;
    }
    
    article {
      padding: 2rem 1.5rem;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }