:root {
    --primary-gradient: linear-gradient(135deg, #6B73FF, #000DFF);
    --secondary-gradient: linear-gradient(45deg, #ff6a00, #ee0979);
    --accent-color: #ff6a00;
    --text-light: #ffffff;
    --text-dark: #333333;
    --card-bg: linear-gradient(145deg, #ffffff, #e6e6e6);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #f8f9fa;
    overflow-x: hidden;
  }

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

  .header {
    background: var(--primary-gradient);
    color: var(--text-light);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 60px;
  }

  .header::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1200 120" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" fill="%23f8f9fa" opacity=".25"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" fill="%23f8f9fa" opacity=".5"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%23f8f9fa"/></svg>');
    background-size: cover;
    z-index: 1;
  }

  .header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
  }

  .notice {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 8px;
    margin-top: 30px;
    display: inline-block;
    backdrop-filter: blur(5px);
  }

  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.7);
    color: var(--text-light);
    display: flex;
    justify-content: space-between;
    padding: 20px 40px;
    z-index: 1000;
    transition: var(--transition);
    backdrop-filter: blur(10px);
  }

  .navbar:hover {
    background: rgba(0, 0, 0, 0.9);
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
  }

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

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

  .theme-switcher {
    cursor: pointer;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .theme-switcher:hover {
    transform: rotate(20deg);
  }

  .content {
    padding: 80px 0;
    position: relative;
    z-index: 2;
  }

  article {
    background-color: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 60px;
  }

  article h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #6B73FF;
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 4px;
    background: var(--secondary-gradient);
    border-radius: 2px;
  }

  article h3 {
    font-size: 1.5rem;
    margin: 30px 0 20px;
    color: #000DFF;
  }

  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  article strong {
    color: #6B73FF;
  }

  article em {
    font-style: italic;
    color: #ee0979;
  }

  article code {
    background-color: #f5f5f5;
    padding: 2px 5px;
    border-radius: 3px;
    font-family: monospace;
  }

  pre {
    background-color: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--secondary-gradient);
    color: white;
    padding: 5px 10px;
    border-radius: 0 0 0 8px;
    font-size: 0.8rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: var(--shadow);
  }

  table th, table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
  }

  table th {
    background: var(--primary-gradient);
    color: white;
    font-weight: 500;
  }

  table tr:nth-child(even) {
    background-color: #f9f9f9;
  }

  table tr:hover {
    background-color: #f1f1f1;
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 300px;
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
  }

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

  .footer {
    background: var(--primary-gradient);
    color: var(--text-light);
    padding: 60px 0;
    text-align: center;
    position: relative;
  }

  .footer::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1200 120" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" fill="%236B73FF" opacity=".25"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" fill="%236B73FF" opacity=".5"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%236B73FF"/></svg>');
    background-size: cover;
    transform: rotate(180deg);
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer p {
    margin-bottom: 20px;
  }

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2.2rem;
    }
    
    .header p {
      font-size: 1rem;
    }
    
    .navbar {
      padding: 15px 20px;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 25px;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.3rem;
    }
  }

  @media (max-width: 480px) {
    .header {
      padding: 80px 0;
    }
    
    .header h1 {
      font-size: 1.8rem;
    }
    
    .nav-links {
      display: none;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }