/* 独享CSS - 404页面主体部分 */
        main {
            margin-top: 80px;
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 60px 0;
        }

        /* 404内容区域 */
        .error-content {
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
            padding: 40px;
            background-color: var(--light-color);
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .error-content:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }

        .error-icon {
            font-size: 120px;
            color: var(--accent-color);
            margin-bottom: 30px;
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-20px);
            }
            60% {
                transform: translateY(-10px);
            }
        }

        .error-title {
            font-size: 48px;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .error-subtitle {
            font-size: 24px;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }

        .error-description {
            font-size: 18px;
            color: #666;
            margin-bottom: 30px;
            line-height: 1.8;
        }

        .btn {
            display: inline-block;
            background-color: var(--secondary-color);
            color: var(--text-light);
            padding: 12px 30px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: bold;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-align: center;
            margin: 5px;
        }

        .btn:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-accent {
            background-color: var(--accent-color);
            color: var(--text-color);
        }

        .btn-accent:hover {
            background-color: #c19b2a;
        }

        .error-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 30px;
        }

        .error-link {
            display: flex;
            align-items: center;
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
            padding: 8px 15px;
            border-radius: 5px;
            background-color: rgba(45, 74, 138, 0.1);
        }

        .error-link:hover {
            color: var(--primary-color);
            background-color: rgba(45, 74, 138, 0.2);
            transform: translateY(-3px);
        }

        .error-link i {
            margin-right: 8px;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                flex-direction: column;
                background-color: var(--primary-color);
                transition: var(--transition);
                padding: 20px 0;
                box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-item {
                margin: 10px 0;
                text-align: center;
            }
            
            .error-icon {
                font-size: 80px;
            }
            
            .error-title {
                font-size: 36px;
            }
            
            .error-subtitle {
                font-size: 20px;
            }
            
            .error-description {
                font-size: 16px;
            }
        }