/* 悬浮按钮 */
    .floating-buttons {
      position: fixed;
      right: 0px;
      top: 50%;
      transform: translateY(-50%);
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }
    
    .floating-btn {
      background: #3498db;
      color: white;
      border: none;
      padding: 15px 20px;
      font-weight: bold;
      cursor: pointer;
      width: 180px;
      text-align: center;
      box-shadow: 0 2px 5px rgba(0,0,0,0.2);
      transition: background 0.3s;
    }
    
    .floating-btn:hover {
      background: #2980b9;
    }
    
    /* 页脚样式 */
    footer {
      background: #60895A;
      color: white;
      padding: 60px 0 20px;
    }
    
   .certifications {
  padding: 80px 0;
  text-align: center; /* 标题和图片容器整体居中 */
}

.cert-title {
  font-size: 18px;
  margin-bottom: 20px;
}

.cert-images {
  display: flex;
  gap: 60px;
  flex-wrap: wrap;
  justify-content: center; /* 图片水平居中对齐 */
  align-items: center; /* 图片垂直居中对齐 */
  margin: 0 auto; /* 容器自身居中 */
  max-width: 1200px; /* 限制最大宽度，避免图片过度分散 */
}

.cert-image {
  max-width: 210px;
  transition: transform 0.3s ease;
}

.cert-image:hover {
  transform: scale(1.05); /* 可选：添加悬停放大效果 */
}
    .footer-logo {
  margin-bottom: 20px;
}

.footer-logo img {
  max-height: 60px;
  width: auto;
  filter: brightness(0) invert(1); /* 将Logo转为白色，适应深色背景 */
}

/* 调整列间距和响应式布局 */
@media (max-width: 768px) {
  .footer-content {
    gap: 30px;
  }
  
  .footer-column {
    text-align: center;
  }
  
  .footer-logo {
    display: flex;
    justify-content: center;
  }
  
  .footer-links li {
    text-align: center;
  }
}
    .footer-content {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }
    
    .footer-column h3 {
      margin-bottom: 20px;
      font-size: 18px;
    }
    
    .footer-links li {
      margin-bottom: 10px;
    }
    
    .social-links {
      display: flex;
      gap: 15px;
      margin-top: 20px;
    }
    
    .social-link {
      width: 40px;
      height: 40px;
      background: rgba(255,255,255,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.3s;
    }
    
    .social-link:hover {
      background: #769D70;
    }
    
    .copyright {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,0.1);
      font-size: 14px;
      color: rgba(255,255,255,0.7);
    }
    
    /* 响应式设计 */
    @media (max-width: 768px) {
      .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
      }
      
      .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
      }
      
      .menu-toggle {
        display: block;
      }
      
      .products-dropdown {
        position: static;
        width: 100%;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 10px 0 10px 20px;
      }
      
      .products-wrapper:hover .products-dropdown,
      .products-wrapper.active .products-dropdown {
        display: flex;
      }
      
      .carousel {
        height: 50vh;
      }
      
      .floating-btn {
        width: 140px;
        padding: 10px 15px;
        font-size: 14px;
      }
      
      .about-content .learn-more {
        position: static;
        display: block;
        margin-top: 20px;
        width: 100%;
        text-align: center;
      }
    }