.config-section {
            padding: 4rem 0;
        }
        .section-title1 {
            text-align: center;
            margin-bottom: 3rem;
            background: linear-gradient(rgba(0, 123, 255, 0.9), rgba(0, 123, 255, 0.9)), 
                        url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?w=1920&h=400&fit=crop') center/cover no-repeat;
            padding: 4rem 2rem;
            color: #fff;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            background: linear-gradient(rgba(0, 123, 255, 0.9), rgba(0, 123, 255, 0.9)), 
                        url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?w=1920&h=400&fit=crop') center/cover no-repeat;
            padding: 4rem 2rem;
            border-radius: 12px;
            color: #fff;
        }
                .continue-action {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        
        .continue-btn {
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 0.5rem;
        }
        .config-summary-item-price{
            font-weight: bold;
            font-size: 1.2rem;
            color: rgb(255, 0, 0);
        }
        .price-display {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .price-label {
            font-size: 0.95rem;
            color: var(--text-gray);
        }
        
        .price-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
        }
        
        .section-title p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.9);
        }
        
        .config-container {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            margin-bottom: 3rem;
        }
        
        .config-sidebar {
            background: #ffffff;
            padding: 2rem;
            border-right: 1px solid var(--border-color);
        }
        
        .product-header-box {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .config-items {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .config-item,
        .config-item1 {
            flex: 0 0 calc(50% - 0.5rem);
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        @media (max-width: 767.98px) {
            .config-item,
            .config-item1 {
                flex: 0 0 100%;
            }
        }
        .config-item label {
            font-weight: 500;
            color: var(--text-dark);
        }
        
        .config-item select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #dcdfe6;
            border-radius: 4px;
            background: #fff;
            font-size: 14px;
            transition: all 0.3s ease;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 1024'%3E%3Cpath fill='%23999999' d='M465.4 682.8L314.8 532.2a34.1 34.1 0 0 1 0-48.4 34.1 34.1 0 0 1 48.4 0l122.2 122.2 122.2-122.2a34.1 34.1 0 0 1 48.4 48.4L528.6 682.8a34.1 34.1 0 0 1-48.4 0 34.1 34.1 0 0 1-14.8 0z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            background-size: 16px;
            padding-right: 40px;
        }

        .config-item select:hover {
            border-color: #409eff;
        }

        .config-item select:focus {
            outline: none;
            border-color: #409eff;
            box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
        }

        .config-item select option {
            padding: 12px 20px;
            font-size: 14px;
            color: #606266;
        }

        .config-item select option:checked {
            color: #409eff;
            font-weight: 500;
        }

        .config-item select option:hover {
            background: #ecf5ff;
            color: #409eff;
        }

        .config-label {
            font-weight: 500;
            color: #606266;
            margin-bottom: 0.5rem;
        }

        .os-selection select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #dcdfe6;
            border-radius: 4px;
            background: #fff;
            font-size: 14px;
            transition: all 0.3s ease;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 1024'%3E%3Cpath fill='%23999999' d='M465.4 682.8L314.8 532.2a34.1 34.1 0 0 1 0-48.4 34.1 34.1 0 0 1 48.4 0l122.2 122.2 122.2-122.2a34.1 34.1 0 0 1 48.4 48.4L528.6 682.8a34.1 34.1 0 0 1-48.4 0 34.1 34.1 0 0 1-14.8 0z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            background-size: 16px;
            padding-right: 40px;
        }

        .os-selection select:hover {
            border-color: #409eff;
        }

        .os-selection select:focus {
            outline: none;
            border-color: #409eff;
            box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
        }

        .os-cards-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .os-cards-container .check-os {
            flex:0 0 calc(50% - 0.667rem);
            min-width: 200px;
        }

        .os-config-item {
            flex: 0 0 100%;
            display: block !important;
        }

        .check-os {
            position: relative;
            border: 0 none;
            margin-bottom: 0;
        }

        .check-system {
            overflow: hidden;
            position: relative;
            cursor: pointer;
            background-color: #fff;
            border: 0 none;
            border-radius: .5rem;
            box-shadow: 0 0.9px 4px -1px rgb(0 0 0 / 8%), 0 2.6px 8px -1px rgb(0 0 0 / 6%), 0 5.7px 12px -1px rgb(0 0 0 / 5%), 0 15px 15px -1px rgb(0 0 0 / 4%);
            transition: all .15s cubic-bezier(.694,.0482,.335,1);
        }

        .check-system:hover {
            box-shadow: 0 1px 5px rgb(0 0 0 / 10%), 0 3.6px 13px rgb(0 0 0 / 7%), 0 8.4px 23px rgb(0 0 0 / 6%), 0 23px 35px rgb(0 0 0 / 5%);
            -webkit-transform: translateY(-2px);
            transform: translateY(-2px);
            cursor: pointer;
        }

        .check-os.select .check-system:before {
            font-family: "Font Awesome 5 Pro";
            content: "\f00c";
            position: absolute;
            top: 1px;
            right: 4px;
            font-weight: 400;
            color: #FFF;
            z-index: 1;
        }

        .check-os.select .check-system:after {
            content: '';
            position: absolute;
            top: -1px;
            right: -1px;
            width: 40px;
            bottom: auto;
            left: auto;
            border-color: #1971ff #1971ff #fff #fff;
            border-style: solid;
            border-width: 20px;
            background-color: #1971ff;
        }

        .check-system .check-content {
            margin-left: 0;
        }

        .check-system label {
            padding: 0;
            width: 100%;
            cursor: pointer;
            margin: 0 !important;
        }

        .os-main {
            display: flex;
            align-items: center;
            padding: 1rem 1.5rem;
        }

        .os-main .os-icon {
            width: 48px;
            height: 48px;
            margin-right: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .os-main .os-svg {
            max-width: 48px;
            max-height: 48px;
        }

        .os-main .os-title {
            font-size: 20px;
            line-height: 26px;
            color: #212529;
            font-weight: 400;
            margin-bottom: 0;
            margin-top: 0px;
        }

        .os-subtitle {
            color: #212529;
            border-top: 1px solid rgba(17,43,134,.1);
            line-height: 40px;
            padding: 0 1rem;
            background-color: #fbfcfd;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .os-subtitle .os-version {
            font-weight: 500;
        }

        .os-subtitle svg {
            fill: currentColor;
        }

        .os-select.show {
            display: block;
        }

        .os-select {
            display: none;
            position: absolute;
            width: 100%;
            background-color: #FFF;
            top: 105%;
            border-radius: .5rem;
            z-index: 20;
            box-shadow: 0 0.9px 4px -1px rgb(0 0 0 / 8%), 0 2.6px 8px -1px rgb(0 0 0 / 6%), 0 5.7px 12px -1px rgb(0 0 0 / 5%), 0 15px 15px -1px rgb(0 0 0 / 4%);
        }

        .os-select ul {
            margin: 0;
            padding: 0;
            list-style: none;
            max-height: 280px;
            overflow-y: scroll;
        }

        .os-select ul li {
            font-weight: 600;
            line-height: 50px;
            text-align: left;
            padding: 0 1rem;
        }

        .os-select ul li:hover {
            cursor: pointer;
            background-color: #e8f1fa;
        }
        
        .divider {
            margin: 2rem 0;
            border: 0;
            border-top: 1px solid var(--border-color);
        }
        
        .config-item1 {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        
        .config-label1 {
            font-weight: 500;
            color: var(--text-dark);
        }
        
        .period-selection .btn-group {
            width: 100%;
            display: flex;
            flex-wrap: -webkit-inline-box;
            gap: 0;
        }

        .period-selection .btn {
            flex: 1;
            min-width: 80px;
            padding: 0.75rem 1rem;
            border: 1px solid #dcdfe6;
            border-radius: 0;
            background: #fff;
            color: #606266;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .period-selection .btn:first-child {
            border-radius: 4px 0 0 4px;
        }

        .period-selection .btn:last-child {
            border-radius: 0 4px 4px 0;
        }

        .period-selection .btn:hover {
            color: #409eff;
            border-color: #409eff;
            z-index: 1;
        }

        .period-selection .btn-check:checked + .btn {
            background: #409eff;
            border-color: #409eff;
            color: #fff;
            z-index: 2;
        }

        .period-selection .btn-check {
            position: absolute;
            clip: rect(0, 0, 0, 0);
            pointer-events: none;
        }

        .quantity-selection .input-group {
            max-width: 150px;
        }

        .quantity-selection .input-group .btn {
            border: 1px solid #dcdfe6;
            background: #fff;
            color: #606266;
            padding: 0.5rem 1rem;
            transition: all 0.3s ease;
        }

        .quantity-selection .input-group .btn:hover {
            color: #409eff;
            border-color: #409eff;
            background: #fff;
        }

        .quantity-selection .input-group .form-control {
            border: 1px solid #dcdfe6;
            border-left: none;
            border-right: none;
            text-align: center;
            font-size: 14px;
            padding: 0.5rem;
        }

        .quantity-selection .input-group .form-control:focus {
            box-shadow: none;
            border-color: #409eff;
        }
        
        .config-item1 input[type="text"],
        .config-item1 textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #dcdfe6;
            border-radius: 4px;
            font-size: 14px;
            transition: all 0.3s ease;
            box-sizing: border-box;
        }

        .config-item1 input[type="text"]:hover,
        .config-item1 textarea:hover {
            border-color: #409eff;
        }

        .config-item1 input[type="text"]:focus,
        .config-item1 textarea:focus {
            outline: none;
            border-color: #409eff;
            box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
        }

        .config-item1 input[type="text"]::placeholder,
        .config-item1 textarea::placeholder {
            color: #c0c4cc;
        }

        .config-item1 textarea {
            resize: vertical;
            min-height: 80px;
        }
        
        .config-main {
            padding: 2rem;
        }
        
        .config-box-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .config-summary {
            background: var(--bg-light);
            border-radius: 12px;
            padding: 2rem;
        }
        
        .config-summary-item {
            display: flex;
            justify-content: space-between;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border-color);
        }
        
        .config-summary-item:last-child {
            border-bottom: none;
        }
        
        .config-summary-item .label {
            color: var(--text-light);
        }
        
        .config-summary-item .value {
            color: var(--text-dark);
        }
        
        .order-button {
            width: 100%;
            margin-top: 2rem;
            padding: 12px 20px;
            background: #409eff;
            color: #fff;
            border: 1px solid #409eff;
            border-radius: 4px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            box-sizing: border-box;
        }

        .order-button:hover {
            background: #66b1ff;
            border-color: #66b1ff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(64, 158, 255, 0.4);
        }

        .order-button:active {
            background: #3a8ee6;
            border-color: #3a8ee6;
            transform: translateY(0);
        }
        
        .form-check {

            display: block;
            min-height: 1.5rem;
            padding-left: 0.3rem;
            margin-bottom: .125rem;
        }
        @media (max-width: 768px) {
            .config-section {
                padding: 2rem 0;
            }
            
            .config-sidebar {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
            }
            
            .period-selection .btn-group {
                display: flex !important;
                flex-wrap: wrap !important;
                gap: 6px !important;
            }
            .form-check {

                display: block;
                min-height: 1.5rem;
                padding-left: 0;
                margin-bottom: .125rem;
            }
            .period-selection .btn {
                margin-bottom: 0.5rem;
            }
            .os-cards-container .check-os{
                flex: 0 0 calc(100% - 0.667rem);
                min-width: 200px;
            }
            .config-summary-item .value{
                font-size: 14px;
                color: var(--text-dark);
            }
            .config-summary-item .label {
                font-size: 14px;
                color: var(--text-light);
            }
        }