:root {
    --primary: #6a11cb;
    --secondary: #2575fc;
    --accent: #00ff7f;
    --text: #2d3748;
    --light: #f8f9fa;
    --dark: #1a202c;
    --gray: #e2e8f0;
    --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: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    padding-top: 80px;
  }

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

  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(5px);
    z-index: 1000;
    font-size: 14px;
    color: var(--dark);
    animation: float 3s ease-in-out infinite;
  }

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

  article {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 40px;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
  }

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

  h2 {
    font-size: 28px;
    margin-bottom: 25px;
    color: var(--dark);
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
  }

  h3 {
    font-size: 22px;
    margin: 30px 0 15px;
    color: var(--dark);
  }

  p {
    margin-bottom: 20px;
    font-size: 17px;
    line-height: 1.7;
  }

  pre {
    background: rgba(106, 17, 203, 0.05);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow-x: auto;
    border-left: 4px solid var(--primary);
    font-size: 15px;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary);
    color: white;
    padding: 3px 10px;
    font-size: 12px;
    border-bottom-left-radius: 4px;
  }

  code {
    font-family: 'Courier New', monospace;
    color: #d63384;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }

  .gallery img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

  .gallery img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  }

  .card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }

  .nav-links {
    display: flex;
    gap: 25px;
  }

  .nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
  }

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

  .summary {
    background: linear-gradient(135deg, rgba(106, 17, 203, 0.1) 0%, rgba(37, 117, 252, 0.1) 100%);
    border-radius: 10px;
    padding: 30px;
    margin: 40px 0;
    border-left: 4px solid var(--primary);
  }

  @media (max-width: 768px) {
    .gallery {
      grid-template-columns: 1fr;
    }
    
    article {
      padding: 30px 20px;
    }
    
    h2 {
      font-size: 24px;
    }
    
    .nav-links {
      gap: 15px;
    }
  }

  @media (max-width: 480px) {
    .header-container {
      flex-direction: column;
      gap: 15px;
    }
    
    .notice {
      bottom: 10px;
      right: 10px;
      left: 10px;
      text-align: center;
    }
  }