/* 404内容区域 */
        .error-content {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 150px 0 80px;
            text-align: center;
        }
        
        .error-container {
            max-width: 700px;
            padding: 40px;
        }
        
        .error-icon {
            font-size: 8rem;
            color: var(--primary-color);
            margin-bottom: 30px;
            animation: float 3s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
        
        .error-title {
            font-size: 4rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .error-subtitle {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: var(--dark-color);
        }
        
        .error-text {
            font-size: 1.1rem;
            color: var(--gray-color);
            margin-bottom: 40px;
            line-height: 1.8;
        }
        
        .btn {
            display: inline-block;
            padding: 14px 35px;
            background: linear-gradient(135deg, var(--accent-color), #e89c2c);
            color: white;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            margin: 0 10px;
        }
        
        .btn:before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: 0.5s;
            animation: btnShine 3s infinite linear;
        }
        
        @keyframes btnShine {
            0% { left: -100%; }
            100% { left: 100%; }
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
        }
        
        .btn-secondary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        }
        
        .quick-links {
            margin-top: 50px;
        }
        
        .quick-links h3 {
            font-size: 1.3rem;
            color: var(--gray-color);
            margin-bottom: 20px;
        }
        
        .quick-links ul {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .quick-links a {
            color: var(--primary-color);
            padding: 8px 15px;
            border-radius: 20px;
            background-color: #f0f7ff;
            transition: var(--transition);
        }
        
        .quick-links a:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        
   
        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                background-color: white;
                width: 100%;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                transition: var(--transition);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .contact-info {
                display: none;
            }
            
            .error-content {
                padding: 130px 0 60px;
            }
            
            .error-icon {
                font-size: 6rem;
            }
            
            .error-title {
                font-size: 3rem;
            }
            
            .error-subtitle {
                font-size: 1.5rem;
            }
            
            .btn {
                display: block;
                margin: 15px auto;
                width: 80%;
                max-width: 280px;
            }
        }
        
        @media (max-width: 576px) {
            .error-icon {
                font-size: 5rem;
            }
            
            .error-title {
                font-size: 2.5rem;
            }
            
            .error-subtitle {
                font-size: 1.3rem;
            }
            
            .error-text {
                font-size: 1rem;
            }
            
            .quick-links ul {
                flex-direction: column;
                align-items: center;
            }
        }