:root {
    --primary: #1E2054;
    --secondary: #4A36B9;
    --accent: #FFA726;
    --text: #333333;
    --light: #FFFFFF;
    --gradient: linear-gradient(135deg, #4A36B9, #7C58FF);
  }

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

  body {
    background-color: #f8f9fa;
    color: var(--text);
    line-height: 1.6;
    padding-top: 80px;
  }

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

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--gradient);
    color: var(--light);
    padding: 20px 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

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

  .logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
  }

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

  .nav-link {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-link:hover {
    color: var(--accent);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
  }

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

  .hero {
    background: var(--gradient);
    color: var(--light);
    padding: 80px 0;
    margin-bottom: 60px;
    border-radius: 0 0 20px 20px;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat;
    background-size: cover;
    opacity: 0.1;
  }

  .hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
  }

  .hero p {
    font-size: 18px;
    margin-bottom: 30px;
  }

  .notice {
    background-color: var(--accent);
    color: var(--light);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    margin: 40px 0;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(255, 167, 38, 0.3);
  }

  article {
    background-color: var(--light);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    margin-bottom: 60px;
  }

  article h2 {
    color: var(--primary);
    font-size: 32px;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
  }

  article h3 {
    color: var(--secondary);
    font-size: 24px;
    margin: 30px 0 20px;
  }

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

  article span {
    color: var(--secondary);
    font-weight: 600;
  }

  pre {
    background-color: #1E2054;
    color: #FFFFFF;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 25px 0;
    font-size: 15px;
    line-height: 1.5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

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

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
  }

  th {
    background-color: var(--primary);
    color: var(--light);
    font-weight: 600;
  }

  tr:nth-child(even) {
    background-color: #f5f5f5;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
  }

  .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

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

  .footer {
    background: var(--gradient);
    color: var(--light);
    padding: 40px 0;
    text-align: center;
  }

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

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
  }

  .footer-link {
    color: var(--light);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-link:hover {
    color: var(--accent);
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 36px;
    }

    .nav-links {
      gap: 15px;
    }

    article {
      padding: 30px 20px;
    }

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

  @media (max-width: 480px) {
    .header-content {
      flex-direction: column;
      gap: 15px;
    }

    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }

    .hero h1 {
      font-size: 28px;
    }

    article h2 {
      font-size: 26px;
    }

    article h3 {
      font-size: 22px;
    }
  }