/* 404内容区域 */
        .error-section {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 160px 0 100px;
            background: linear-gradient(135deg, var(--light) 0%, #FFFFFF 100%);
        }
        
        .error-container {
            text-align: center;
            max-width: 800px;
            padding: 50px;
            background: var(--light-text);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .error-container::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: var(--accent);
            border-radius: 50%;
            opacity: 0.1;
            z-index: 0;
        }
        
        .error-container::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: var(--primary);
            border-radius: 50%;
            opacity: 0.05;
            z-index: 0;
        }
        
        .error-content {
            position: relative;
            z-index: 1;
        }
        
        .error-icon {
            font-size: 8rem;
            color: var(--primary);
            margin-bottom: 30px;
            animation: bounce 2s infinite;
        }
        
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-30px);
            }
            60% {
                transform: translateY(-15px);
            }
        }
        
        .error-title {
            font-size: 6rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
            line-height: 1;
        }
        
        .error-subtitle {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 30px;
        }
        
        .error-text {
            font-size: 1.2rem;
            margin-bottom: 40px;
            color: var(--text);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 14px 32px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
            margin: 10px;
        }
        
        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.6);
        }
        
        .btn i {
            margin-left: 8px;
        }
        
        .btn-secondary {
            background: var(--primary);
            color: var(--light-text);
            box-shadow: 0 4px 14px rgba(30, 64, 175, 0.4);
        }
        
        .btn-secondary:hover {
            background: var(--primary-light);
            box-shadow: 0 6px 20px rgba(30, 64, 175, 0.6);
        }
        
  
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .error-title {
                font-size: 5rem;
            }
            
            .error-subtitle {
                font-size: 1.8rem;
            }
        }
        
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: var(--primary-dark);
                width: 100%;
                text-align: center;
                transition: 0.4s;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                padding: 30px 0;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 20px 0;
            }
            
            .error-icon {
                font-size: 6rem;
            }
            
            .error-title {
                font-size: 4rem;
            }
            
            .error-subtitle {
                font-size: 1.5rem;
            }
            
            .error-text {
                font-size: 1.1rem;
            }
            
            .btn-container {
                display: flex;
                flex-direction: column;
            }
            
            .btn {
                margin: 5px 0;
            }
        }