/* 404页面内容样式 */
        .error-section {
            padding: 180px 0 100px;
            text-align: center;
            background-color: var(--light-color);
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        
        .error-content {
            max-width: 700px;
            margin: 0 auto;
            animation: fadeInUp 1s ease;
        }
        
        .error-code {
            font-size: 8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1;
        }
        
        .error-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        
        .error-description {
            font-size: 1.2rem;
            color: var(--gray-color);
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .error-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--accent-color);
            color: white;
            border-radius: 50px;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
            background-color: var(--primary-color);
        }
        
        .btn-secondary {
            background-color: white;
            color: var(--dark-color);
            border: 1px solid var(--gray-color);
        }
        
        .btn-secondary:hover {
            background-color: var(--light-color);
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .error-icon {
            font-size: 120px;
            color: var(--accent-color);
            margin-bottom: 30px;
            animation: bounce 2s infinite;
        }
        
     
        
        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-20px);
            }
            60% {
                transform: translateY(-10px);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: white;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                transition: var(--transition);
                gap: 30px;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-phone {
                display: none;
            }
            
            .mobile-phone {
                display: block;
                margin-top: 20px;
                color: var(--primary-color);
                font-weight: 700;
                font-size: 18px;
            }
            
            .hamburger {
                display: block;
                font-size: 24px;
            }
            
            .error-code {
                font-size: 6rem;
            }
            
            .error-title {
                font-size: 2rem;
            }
            
            .error-icon {
                font-size: 80px;
            }
            
            .friend-links ul {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (min-width: 769px) {
            .mobile-phone {
                display: none;
            }
        }