:root {
    --primary: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    --secondary: rgba(255, 255, 255, 0.15);
    --accent: #b91372;
    --text: #ffffff;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  }

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

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

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

  .header {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    opacity: 0.2;
    z-index: -1;
  }

  .header-content {
    max-width: 800px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: var(--shadow);
    transform: translateY(0);
    transition: transform 0.5s ease;
  }

  .header-content:hover {
    transform: translateY(-10px);
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #ffffff, #b91372);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .tagline {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50px;
    font-size: 0.9rem;
    z-index: 1000;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(90deg, #ffffff, #b91372);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

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

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

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

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

  article {
    padding: 100px 0;
  }

  .article-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
  }

  h2 {
    font-size: 2.2rem;
    margin: 40px 0 20px;
    background: linear-gradient(90deg, #ffffff, #b91372);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  h3 {
    font-size: 1.8rem;
    margin: 30px 0 15px;
    color: var(--text);
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    line-height: 1.7;
  }

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

  .image-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
  }

  .image-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
  }

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 0.9rem;
  }

  .glass-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 30px;
    margin: 40px 0;
    transition: transform 0.3s ease;
  }

  .glass-card:hover {
    transform: translateY(-5px);
  }

  .footer {
    padding: 50px 0;
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
  }

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

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

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

  @media (max-width: 768px) {
    .header {
      height: 60vh;
    }

    h1 {
      font-size: 2rem;
    }

    .nav-links {
      gap: 15px;
    }

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