body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f9fafc;
  }
  .container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
  }
  header {
    text-align: center;
    margin-bottom: 3rem;
  }
  h1 {
    font-size: 2.5rem;
    color: #1a73e8;
    margin-bottom: 1rem;
  }
  .subtitle {
    font-size: 1.2rem;
    color: #666;
  }
  .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
  }
  .feature-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: transform 0.2s;
  }
  .feature-card:hover {
    transform: translateY(-5px);
  }
  .feature-card h3 {
    color: #1a73e8;
    margin-bottom: 0.8rem;
  }
  .cta {
    text-align: center;
    background: #eef5ff;
    padding: 2rem;
    border-radius: 12px;
  }
  .btn {
    display: inline-block;
    background: #1a73e8;
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 1rem;
  }
  footer {
    text-align: center;
    margin-top: 3rem;
    color: #999;
    font-size: 0.9rem;
  }