* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
           font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
            #bg-frame {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      border: none;
      z-index: -1;
      pointer-events: none;}
      
        .main-content {
            flex: 1;
           display: block;
  padding: 0;
        }
        
        .site-footer {
            background: linear-gradient(135deg, #2c3e50 0%, #1a2530 100%);
            color: #fff;
            padding: 40px 0 20px;
            margin-top: auto;
        }
        
        .footer-container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 30px;
        }
        
        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 30px;
            padding: 0 15px;
        }
        
        .footer-section h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
            color:white;
        }
        
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: #3498db;
        }
        
        .footer-contact p {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        
        .footer-contact i {
            margin-right: 10px;
            color: #3498db;
            width: 20px;
            text-align: center;
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s ease;
            display: flex;
            align-items: center;
        }
        
        .footer-links a:hover {
            color: #3498db;
        }
        
        .footer-links i {
            margin-right: 10px;
            color: #3498db;
            width: 20px;
            text-align: center;
        }
        
        .footer-newsletter p {
            margin-bottom: 15px;
            line-height: 1.6;
        }
        
        .newsletter-form {
            display: flex;
            margin-bottom: 15px;
        }
        
        .newsletter-form input {
            flex: 1;
            padding: 12px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            outline: none;
        }
        
        .newsletter-form button {
            background: #3498db;
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        
        .newsletter-form button:hover {
            background: #2980b9;
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
        }
        
        .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .social-icons a:hover {
            background: #3498db;
            transform: translateY(-3px);
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
        }
        
        .footer-info {
            margin-bottom: 15px;
            line-height: 1.6;
            color: #aaa;
        }
        
        .footer-info a {
            color: #3498db;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-info a:hover {
            text-decoration: underline;
        }
        
        .beian-info {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 15px;
        }
        
        .beian-item {
            display: flex;
            align-items: center;
            color: #aaa;
            text-decoration: none;
            font-size: 0.9rem;
        }
        
        .beian-item img {
            margin-right: 8px;
            height: 20px;
        }
        
        .copyright {
            margin-top: 20px;
            color: #777;
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .footer-content {
                flex-direction: column;
            }
            
            .footer-section {
                min-width: 100%;
            }
            
            .newsletter-form {
                flex-direction: column;
            }
            
            .newsletter-form input {
                border-radius: 4px;
                margin-bottom: 10px;
            }
            
            .newsletter-form button {
                border-radius: 4px;
                padding: 12px;
            }
        }