:root {
    --primary-dark: #0d1b2a;
    --primary-mid: #1b263b;
    --primary-light: #415a77;
    --accent-neon: #1dd1a1;
    --accent-yellow: #f8e112;
    --accent-pink: #ff6b6b;
    --text-light: #e0e1dd;
    --shadow-dark: rgba(0, 0, 0, 0.3);
    --shadow-light: rgba(255, 255, 255, 0.1);
  }

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

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap');
  }

  body {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-mid), var(--primary-light));
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

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

  .header {
    position: relative;
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    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: 0.1;
    z-index: -1;
  }

  .header h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--accent-yellow), var(--accent-neon), var(--accent-pink));
    -webkit-background-clip: text;
    color: transparent;
    text-shadow: 0 0 10px rgba(29, 209, 161, 0.3);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 2rem;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(27, 38, 59, 0.9);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    font-size: 0.9rem;
  }

  .notice::after {
    content: '这是一个网页样式设计参考';
    color: var(--accent-yellow);
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(13, 27, 42, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
  }

  .nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-neon);
    text-decoration: none;
  }

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

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

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

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

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

  article {
    max-width: 900px;
    margin: 100px auto;
    padding: 40px;
    background: rgba(27, 38, 59, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  article h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-neon);
    position: relative;
    padding-bottom: 10px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-neon), transparent);
  }

  article h3 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1.5rem;
    color: var(--accent-yellow);
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
  }

  pre {
    background: rgba(13, 27, 42, 0.8);
    border-radius: 10px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--accent-neon);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-yellow);
    font-size: 0.9rem;
  }

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

  .image-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .image-card:hover img {
    transform: scale(1.1);
  }

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(13, 27, 42, 0.7), transparent);
  }

  .footer {
    text-align: center;
    padding: 30px 0;
    background: rgba(13, 27, 42, 0.8);
    margin-top: 100px;
  }

  .footer p {
    color: var(--text-light);
    opacity: 0.7;
  }

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2.5rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 30px 20px;
      margin: 80px auto;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.5rem;
    }
  }

  @media (max-width: 480px) {
    .header h1 {
      font-size: 2rem;
    }
    
    .nav-container {
      flex-direction: column;
      gap: 15px;
    }
    
    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }