/* 独享CSS - 404页面特有样式 */
        main {
            margin-top: 80px;
            padding: 80px 0;
            min-height: calc(100vh - 80px - 400px); /* 减去导航和底部高度 */
            display: flex;
            align-items: center;
        }

        .error-content {
            width: 100%;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            padding: 40px;
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            position: relative;
            overflow: hidden;
        }

        .error-content::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
            animation: gradientShift 3s ease infinite;
        }

        .error-icon {
            font-size: 120px;
            color: var(--primary-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-code {
            font-size: 120px;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 10px;
            line-height: 1;
            text-shadow: 3px 3px 0 rgba(0, 51, 102, 0.1);
        }

        .error-title {
            font-size: 32px;
            color: var(--dark-color);
            margin-bottom: 20px;
        }

        .error-description {
            font-size: 18px;
            color: var(--text-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-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 6px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 16px;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: white;
            box-shadow: 0 4px 15px rgba(0, 51, 102, 0.2);
        }

        .btn-primary:hover {
            background-color: var(--accent-color);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 51, 102, 0.3);
        }

        .btn-secondary {
            background-color: var(--light-color);
            color: var(--primary-color);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
        }

        .btn-secondary:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(212, 175, 55, 0.3);
        }

        .search-box {
            margin-top: 40px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .search-form {
            display: flex;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-radius: 6px;
            overflow: hidden;
        }

        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            font-size: 16px;
            background-color: white;
        }

        .search-input:focus {
            outline: none;
        }

        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            cursor: pointer;
            transition: var(--transition);
        }

        .search-button:hover {
            background-color: var(--accent-color);
        }

        /* 动画效果 */
        .error-content {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s ease forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .error-code {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1);
            }
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 80px;
            }
            
            .error-title {
                font-size: 24px;
            }
            
            .error-description {
                font-size: 16px;
            }
            
            .error-actions {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .error-content {
                padding: 30px 20px;
            }
            
            .error-code {
                font-size: 60px;
            }
            
            .error-icon {
                font-size: 80px;
            }
        }