/* 页脚样式 */
footer {
    background: var(--primary);
    color: white;
    padding: 60px 0 30px;
  }
  
  .footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
  }
  
  .footer-column {
    margin-bottom: 30px;
  }
  
  .footer-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
    color: white;
  }
  
  .footer-about p {
    margin-bottom: 20px;
    opacity: 0.8;
    line-height: 1.6;
  }
  
  .social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
  }
  
  .social-links a {
    color: white;
    font-size: 20px;
    transition: opacity 0.3s;
  }
  
  .social-links a:hover {
    opacity: 0.8;
  }
  
  .footer-links h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent);
  }
  
  .footer-links ul {
    list-style: none;
  }
  
  .footer-links ul li {
    margin-bottom: 10px;
  }
  
  .footer-links ul li a {
    color: white;
    opacity: 0.8;
    text-decoration: none;
    transition: opacity 0.3s;
  }
  
  .footer-links ul li a:hover {
    opacity: 1;
  }
  
  .copyright {
    text-align: center;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
    font-size: 14px;
    grid-column: 1 / -1;
  }