:root {
    --primary: #1a2a6c;
    --secondary: #6c1a8f;
    --accent: #fdbb2d;
    --text: #f8f9fa;
    --bg: #121212;
    --card-bg: rgba(26, 42, 108, 0.2);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  }

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

  body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
    overflow-x: hidden;
    min-height: 100%;
    padding: 0 5%;
  }

  .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 0;
  }

  .hero {
    position: relative;
    height: 60vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 0 0 30px 30px;
    margin-bottom: 4rem;
    overflow: hidden;
  }

  .hero::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: 0;
  }

  .hero-content {
    position: relative;
    z-index: 1;
    padding: 2rem;
    max-width: 800px;
  }

  h1, h2, h3, h4 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.3;
  }

  h1 {
    font-size: 3.5rem;
    background: linear-gradient(to right, var(--text), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  h2 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-top: 3rem;
    position: relative;
    padding-bottom: 1rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--accent), transparent);
    border-radius: 2px;
  }

  h3 {
    font-size: 1.8rem;
    color: var(--text);
    margin-top: 2rem;
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: rgba(255,255,255,0.9);
  }

  .notice {
    background: rgba(253, 187, 45, 0.1);
    border-left: 4px solid var(--accent);
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    font-size: 0.9rem;
  }

  .notice::before {
    content: "这是一个网页样式设计参考";
    display: block;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--accent);
  }

  .grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: var(--transition);
  }

  .card-img:hover {
    transform: scale(1.02);
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
  }

  code {
    color: var(--accent);
    background: rgba(253, 187, 45, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26, 42, 108, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 5%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 20px rgba(0,0,0,0.2);
  }

  .nav-links {
    display: flex;
    gap: 2rem;
  }

  .nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition);
  }

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

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

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

  .footer {
    text-align: center;
    padding: 3rem 0;
    margin-top: 5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .sparkle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    filter: blur(1px);
    animation: sparkle 2s infinite alternate;
  }

  @keyframes sparkle {
    0% { opacity: 0; transform: scale(0.5); }
    100% { opacity: 1; transform: scale(1.5); }
  }

  @media (max-width: 768px) {
    .grid-layout {
      grid-template-columns: 1fr;
    }
    
    h1 {
      font-size: 2.5rem;
    }
    
    h2 {
      font-size: 2rem;
    }
    
    .hero {
      height: auto;
      padding: 4rem 0;
    }
  }