/* 404内容区域 */
        .error-section {
            padding: 180px 0 100px;
            text-align: center;
            background-color: var(--secondary-color);
        }
        
        .error-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .error-code {
            font-size: 120px;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1;
        }
        
        .error-title {
            font-size: 36px;
            margin-bottom: 20px;
            color: var(--text-color);
        }
        
        .error-message {
            font-size: 18px;
            color: var(--light-text);
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--primary-color);
            color: white;
            border-radius: var(--border-radius);
            font-weight: 500;
            transition: var(--transition);
            margin: 10px;
        }
        
        .btn:hover {
            background-color: #1c5bb8;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }
        
        .btn-outline:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
     
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                background-color: white;
                width: 100%;
                height: calc(100vh - 80px);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                transition: var(--transition);
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            .menu-toggle {
                display: block;
            }
            
            .error-code {
                font-size: 100px;
            }
            
            .error-title {
                font-size: 28px;
            }
        }
        
        @media (max-width: 768px) {
            .error-code {
                font-size: 80px;
            }
            
            .error-title {
                font-size: 24px;
            }
            
            .error-message {
                font-size: 16px;
            }
        }