/* ===== 404页面独享CSS ===== */
        
        /* 404内容区域 */
        .error-content {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 150px 0 80px;
            margin-top: 70px;
        }
        
        .error-container {
            text-align: center;
            max-width: 700px;
            width: 100%;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .error-animation {
            position: relative;
            margin-bottom: 40px;
        }
        
        .error-number {
            font-size: 12rem;
            font-weight: 900;
            color: var(--primary-color);
            line-height: 1;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            text-shadow: 5px 5px 0 rgba(26, 115, 232, 0.1);
            animation: float 3s ease-in-out infinite;
        }
        
        @keyframes float {
            0% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
            100% { transform: translateY(0); }
        }
        
        .error-icon {
            position: absolute;
            font-size: 4rem;
            color: var(--accent-color);
            animation: spin 8s linear infinite;
        }
        
        .error-icon-1 {
            top: 20%;
            left: 15%;
        }
        
        .error-icon-2 {
            bottom: 20%;
            right: 15%;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .error-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--dark-color);
            font-weight: 800;
        }
        
        .error-description {
            font-size: 1.2rem;
            color: #666;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        
        .error-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .btn-alt {
            background: var(--gradient-alt);
            box-shadow: 0 4px 15px rgba(251, 188, 5, 0.3);
        }
        
        .btn-alt:hover {
            box-shadow: 0 6px 20px rgba(251, 188, 5, 0.4);
        }
        
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            box-shadow: none;
        }
        
        .btn-outline:hover {
            background: var(--primary-color);
            color: white;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .error-number {
                font-size: 10rem;
            }
            
            .error-title {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            
            nav.active {
                max-height: 300px;
            }
            
            nav ul {
                flex-direction: column;
                padding: 20px 0;
            }
            
            nav ul li {
                margin: 10px 0;
            }
            
            .error-number {
                font-size: 8rem;
            }
            
            .error-title {
                font-size: 1.8rem;
            }
            
            .error-description {
                font-size: 1.1rem;
            }
            
            .error-actions {
                flex-direction: column;
                align-items: center;
            }
            
            .error-icon {
                font-size: 3rem;
            }
        }
        
        @media (max-width: 576px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
            
            .phone-number {
                font-size: 0.9rem;
                padding: 6px 12px;
            }
            
            .error-number {
                font-size: 6rem;
            }
            
            .error-title {
                font-size: 1.5rem;
            }
            
            .error-description {
                font-size: 1rem;
            }
            
            .error-icon {
                font-size: 2.5rem;
            }
        }