.background_and {
        background-image: url("../image/device/bg1.png");
        background-size: cover;
        background-repeat: no-repeat;
        padding: 10rem 0;
    }



    .background_and .background_and_title {
        font-weight: bold;
        font-size: 6.2rem;
        color: #0E172D;
        text-align: center;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 5rem;
    }

    .background_and .background_and_list {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;

    }


    .background_and .background_and_item_left {
        position: relative;
        padding: 3.8rem;
    }

    .background_and .background_and_item_left {
        background: linear-gradient(90deg, #0086FE 0%, #0037FF 100%);
    }

    .background_and .background_and_item_left ul {
        position: relative;
        z-index: 1;
    }

    .background_and .background_and_item_left li {
        font-weight: 400;
        font-size: 1.4rem;
        color: #FFFFFF;
        line-height: 2.2rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin-bottom: 1.2rem;
        list-style: disc;

    }

    .background_and .bag_icon {
        max-width: 12rem;
        max-height: 12rem;
        position: absolute;
        bottom: 0;
        right: 0;
        z-index: 0;
    }

    .background_and .background_and_item {
        display: flex;
        flex-direction: column;
    }

    .background_and .background_and_top_title {
        font-weight: bold;
        font-size: 2rem;
        color: #0E172D;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 1.6rem;
    }

    .background_and .background_and_top li {
        font-weight: 400;
        font-size: 1.4rem;
        color: rgba(14, 23, 45, 0.8);
        line-height: 2.2rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        list-style: disc;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
    }

    .background_and .background_and_bom li {
        font-weight: 400;
        font-size: 1.4rem;
        color: rgba(14, 23, 45, 0.8);
        line-height: 2.2rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        list-style: disc;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
    }

    .background_and .background_and_top {
        background: linear-gradient(180deg, #F2F4F7 0%, #FFFFFF 100%);
        position: relative;
        padding: 3.8rem;
        flex: 1;
        border-right: 1px solid #E9E9E9;
        cursor: pointer;
        transition: transform 0.35s ease, box-shadow 0.35s ease;
    }

    .background_and .background_and_top:hover {
        transform: translateY(-0.6rem);
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
    }

    .background_and .background_and_bom {
        position: relative;
        background: linear-gradient(180deg, #F2F4F7 0%, #FFFFFF 100%);
        padding: 3.8rem;
        flex: 1;
        border-right: 1px solid #E9E9E9;
        cursor: pointer;
        transition: transform 0.35s ease, box-shadow 0.35s ease;
    }

    .background_and .background_and_bom:hover {
        transform: translateY(-0.6rem);
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
    }



    .background_and .background_and_top_prve {
        position: relative;
        z-index: 1;
    }

    .system_Components {
        background-image: url("../image/device/bg2.png");
        background-size: cover;
        background-repeat: no-repeat;
        padding: 10rem 0;
    }

    .system_Components .system_Components_title {
        font-weight: bold;
        font-size: 6.2rem;
        color: #fff;
        text-align: center;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 5rem;
    }

    .system_Components .system_Components_text {
        display: flex;
        max-width: 1300px;
        margin: auto;
    }
 .system_contnc{
     display:grid;
     align-items:center; 
     justify-content: center;
     gap:0 8rem;
     grid-template-columns: 1fr 1fr;
     padding: 0 8rem;
 }
    .system_Components .system_Components_nav {
        background: linear-gradient(132deg, rgba(243, 247, 255, 0.09) 0%, rgba(243, 247, 255, 0.09) 100%);
   
        width: 22rem;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .system_Components .system_Components_nav_item {
        padding: 4.2rem 2.9rem;
        font-weight: bold;
        font-size: 1.8rem;
        color: #FFFFFF;
        text-align: left;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        width: 100%;
        cursor: pointer;
    }

    .system_Components .system_Components_nav_item.active {
        background: linear-gradient(90deg, #0086FE 0%, #0037FF 100%);
    }

    .system_Components .system_Components_right {
        display: flex;
        gap: 16rem;
        align-items: center;
        justify-content: center;
        width: 100%;
        background: linear-gradient(132deg, rgba(243, 247, 255, 0.2) 0%, rgba(243, 247, 255, 0.2) 100%);
    }

    .system_Components .system_cont {
        display: none;
        opacity: 0;
        transform: translateX(2rem);
        transition: opacity 0.35s ease, transform 0.35s ease;
        width: 100%;
    }

    .system_Components .system_cont.active {
        display: block;
        opacity: 1;
        transform: translateX(0);
    }

    .system_Components .system_cont .system_cont_title {
        font-weight: bold;
        font-size: 3.2rem;
        color: #FFFFFF;
        text-align: left;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 2rem;
    }

    .system_Components .system_cont ul {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0 8rem;
    }

    .system_Components .system_cont ul li {
        font-weight: 600;
        font-size: 1.8rem;
        color: #FFFFFF;
        line-height: 4.3rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        list-style: disc;
    }

    .system_Components .system_img {
        height: 32rem;
        width: 32rem;
    }

    .system_Components .system_img img {
        height: 100%;
        width: 100%;
        object-fit: cover;
    }

    .device_plan {
        background-image: url("../image/device/bg3.png");
        background-size: cover;
        background-repeat: no-repeat;
        padding: 10rem 0;
    }

    .device_plan .device_plan_title {
        font-weight: bold;
        font-size: 6.2rem;
        color: #000;
        text-align: center;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 5rem;
    }

    .device_plan .device_plan_nav {
        display: flex;
        justify-content: center;
        gap: 1rem;
        margin-bottom: 5rem;
    }

    .device_plan .device_plan_nav_item {
        padding: 2.7rem 5rem;
        font-weight: 400;
        font-size: 2rem;
        color: #000000;
        text-align: center;
        font-style: normal;
        text-transform: none;
        cursor: pointer;
        transition: all 0.35s ease;
    }

    .device_plan .device_plan_nav_item.active {
        background: url("../image/device/hh.png") center/cover no-repeat, linear-gradient(90deg, #0086FE 0%, #0037FF 100%);
        color: #fff;
    }

    .device_plan .device_plan_cont {
        display: none;
        text-align: center;
        opacity: 0;
        transform: translateY(2rem);
        transition: opacity 0.4s ease, transform 0.4s ease;
    }

    .device_plan .device_plan_cont.active {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

    .device_plan .device_plan_cont img {
        max-width: 100%;
        height: auto;
    }

    .device_platform {
        background-image: url("../image/device/bg4.png");
        background-size: cover;
        background-repeat: no-repeat;
        padding: 10rem 0;
    }

    .device_platform .device_platform_title {
        font-weight: bold;
        font-size: 6.2rem;
        color: #0E172D;
        text-align: center;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 5rem;
    }

    .device_platform .device_platform_list {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr;
        gap: 2rem;
    }

    .device_platform .device_platform_item {
        position: relative;
        cursor: pointer;
        overflow: hidden;
    }

    .device_platform .device_prd {
        width: 100%;
        height: 100%;
        object-fit: cover;
         transition: all 0.35s ease;
    }

    .device_platform .device_platform_item_title {
        position: absolute;
        bottom: 2.6rem;
        width: 100%;
        text-align: center;
        z-index: 1;
        color: red;
        font-weight: bold;
        font-size: 2rem;
        color: #FFFFFF;
        font-family: titFont;
    }

    .device_platform .device_platform_item_mask {
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        background-color: rgba(11, 29, 65, 0.1);
        border: #0037FF 1px solid;
    }

    .device_platform .device_platform_item_folt {
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        z-index: 2;
        padding: 2rem 2rem 2rem 4rem;
        background: linear-gradient(90deg, rgba(0, 134, 254, 0.8) 0%, rgba(0, 55, 255, 0.8) 100%);
        opacity: 0;
        transition: all 0.35s ease;
    }

    .device_platform .device_platform_item_folt_title {
        font-weight: bold;
        font-size: 2rem;
        color: #FFFFFF;
        text-align: left;
        font-style: normal;
        text-transform: none;
        font-family: titFont;
        margin-bottom: 2rem;
    }

    .device_platform .device_platform_item_folt li {
        font-weight: 400;
        font-size: 1.4rem;
        color: #FFFFFF;
        line-height: 2.3rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        list-style: disc;
    }
    .device_platform .device_platform_item:hover .device_platform_item_folt {
        opacity: 1;
    }
      .device_platform .device_platform_item:hover .device_prd {
          transform: scale(1.1);
    }
    .device_platform .device_platform_item:hover .device_platform_item_title{
        /*opacity: 0;*/
    }


    /* ============ 自适应：参考 aboutUs.css 断点 ============ */

    @media (max-width: 1599px) {
        .device_platform .device_platform_list{
            grid-template-columns: 1fr 1fr 1fr;
        }
        .device_platform .device_platform_item_folt li{
            line-height: 3rem;
        }
        .background_and {
            padding: 8rem 0;
        }
        .background_and .background_and_title {
            font-size: 5rem;
            margin-bottom: 4rem;
        }
        .background_and .background_and_top,
        .background_and .background_and_bom,
        .background_and .background_and_item_left {
            padding: 3rem;
        }
        .background_and .bag_icon {
            max-width: 10rem;
            max-height: 10rem;
        }
        .system_Components {
            padding: 8rem 0;
        }
        .system_Components .system_Components_title {
            font-size: 5rem;
            margin-bottom: 4rem;
        }
        .system_Components .system_Components_right {
            gap: 12rem;
        }
        .system_Components .system_img {
            height: 28rem;
            width: 28rem;
        }
        .device_plan {
            padding: 8rem 0;
        }
        .device_plan .device_plan_title {
            font-size: 5rem;
            margin-bottom: 4rem;
        }
        .device_plan .device_plan_nav {
            margin-bottom: 4rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 2.2rem 4rem;
            font-size: 1.8rem;
        }
        .device_platform {
            padding: 8rem 0;
        }
        .device_platform .device_platform_title {
            font-size: 5rem;
            margin-bottom: 4rem;
        }
        .device_platform .device_platform_item_title {
            font-size: 1.8rem;
        }
    }

    @media (max-width: 1439px) {
        .background_and .background_and_title {
            font-size: 4.2rem;
            margin-bottom: 3rem;
        }
        .background_and .background_and_top_title {
            font-size: 1.8rem;
            margin-bottom: 1.2rem;
        }
        .background_and .background_and_top li,
        .background_and .background_and_bom li {
            line-height: 2rem;
        }
        .system_Components {
            padding: 6rem 0;
        }
        .system_Components .system_Components_title {
            font-size: 4.2rem;
            margin-bottom: 3rem;
        }
        .system_Components .system_Components_nav {
            width: 20rem;
        }
        .system_Components .system_Components_nav_item {
            padding: 3.6rem 2.4rem;
            font-size: 1.6rem;
        }
        .system_Components .system_Components_right {
            gap: 8rem;
        }
        .system_Components .system_cont .system_cont_title {
            font-size: 2.8rem;
        }
        .system_Components .system_cont ul {
            gap: 0 5rem;
        }
        .system_Components .system_cont ul li {
            font-size: 1.6rem;
            line-height: 3.6rem;
        }
        .system_Components .system_img {
            height: 24rem;
            width: 24rem;
        }
        .device_plan {
            padding: 6rem 0;
        }
        .device_plan .device_plan_title {
            font-size: 4.2rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 2rem 3.5rem;
            font-size: 1.6rem;
        }
        .device_platform {
            padding: 6rem 0;
        }
        .device_platform .device_platform_title {
            font-size: 4.2rem;
        }
        .device_platform .device_platform_list {
            gap: 1.5rem;
        }
        .device_platform .device_platform_item_title {
            font-size: 1.6rem;
            bottom: 2rem;
        }
        .device_platform .device_platform_item_folt {
            padding: 1rem;
        }
        .device_platform .device_platform_item_folt_title {
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
        }
        .device_platform .device_platform_item_folt li {
            line-height: 2.4rem;
        }
    }

    @media (max-width: 1279px) {
        .background_and {
            padding: 5rem 0;
        }
        .background_and .background_and_title {
            font-size: 3.6rem;
        }
        .background_and .background_and_list {
            grid-template-columns: 1fr 1fr;
        }
        .background_and .background_and_top,
        .background_and .background_and_bom {
            padding: 2.5rem;
        }
        .background_and .background_and_item_left {
            padding: 2.5rem;
        }
        .background_and .background_and_top_title {
            font-size: 1.6rem;
        }
        .background_and .bag_icon {
            max-width: 8rem;
            max-height: 8rem;
        }
        .system_Components {
            padding: 5rem 0;
        }
        .system_Components .system_Components_title {
            font-size: 3.6rem;
        }
        .system_Components .system_Components_nav {
            width: 18rem;
        }
        .system_Components .system_Components_nav_item {
            padding: 3rem 2rem;
            font-size: 1.6rem;
        }
        .system_Components .system_Components_right {
            gap: 5rem;
        }
        .system_Components .system_cont .system_cont_title {
            font-size: 2.4rem;
        }
        .system_Components .system_cont ul {
            gap: 0 3rem;
        }
        .system_Components .system_cont ul li {
            font-size: 1.4rem;
            line-height: 3rem;
        }
        .system_Components .system_img {
            height: 20rem;
            width: 20rem;
        }
        .device_plan {
            padding: 5rem 0;
        }
        .device_plan .device_plan_title {
            font-size: 3.6rem;
        }
        .device_plan .device_plan_nav {
            gap: 0.8rem;
            margin-bottom: 3rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 1.8rem 3rem;
            font-size: 1.4rem;
        }
        .device_platform {
            padding: 5rem 0;
        }
        .device_platform .device_platform_title {
            font-size: 3.6rem;
        }
        .device_platform .device_platform_list {
            grid-template-columns: 1fr 1fr 1fr;
        }
        .device_platform .device_platform_item_title {
            font-size: 1.4rem;
            bottom: 1.5rem;
        }
        .device_platform .device_platform_item_folt_title {
            font-size: 1.6rem;
        }
        .device_platform .device_platform_item_folt li {
            font-size: 1.4rem;
            line-height: 2.2rem;
        }
    }

    @media (max-width: 1199px) {
        .background_and .background_and_title {
            font-size: 3.2rem;
        }
        .background_and .background_and_top_title {
            font-size: 1.4rem;
        }
        .background_and .background_and_top,
        .background_and .background_and_bom,
        .background_and .background_and_item_left {
            padding: 2rem;
        }
        .background_and .bag_icon {
            max-width: 6rem;
            max-height: 6rem;
        }
        .system_Components .system_Components_title {
            font-size: 3.2rem;
        }
        .system_Components .system_Components_text {
            flex-direction: column;
        }
        .system_Components .system_Components_nav {
            width: 100%;
            flex-direction: row;
            padding-bottom: 0;
            justify-content:space-between;
        }
        .system_Components .system_Components_nav_item {
            padding: 2rem 1.5rem;
            font-size: 1.4rem;
            text-align: center;
            width: auto;
        }
        .system_Components .system_Components_right {
            gap: 3rem;
        }
        .system_Components .system_cont .system_cont_title {
            font-size: 2rem;
        }
        .system_Components .system_cont ul li {
            font-size: 1.4rem;
            line-height: 2.6rem;
        }
        .system_Components .system_img {
            height: 16rem;
            width: 16rem;
        }
        .device_plan .device_plan_title {
            font-size: 3.2rem;
        }
        .device_plan .device_plan_nav {
            flex-wrap: wrap;
            gap: 0.6rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 1.5rem 2.5rem;
            font-size: 1.4rem;
        }
        .device_platform .device_platform_title {
            font-size: 3.2rem;
        }
        .device_platform .device_platform_list {
            grid-template-columns: 1fr 1fr;
        }
  
        .device_platform .device_platform_item_folt_title {
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }
    }

    @media (max-width: 991px) {
        /*.system_Components .system_cont ul{*/
        /*   display: grid;*/
        /*   grid-template-columns: 1fr 1fr 1fr !important;*/
        /*   gap: 2rem;*/
        /*}*/
        .background_and {
            padding: 4rem 0;
        }
        .background_and .background_and_title {
            font-size: 2.8rem;
            margin-bottom: 2rem;
        }
        .background_and .background_and_list {
            grid-template-columns: 1fr;
        }
        .background_and .background_and_top,
        .background_and .background_and_bom {
            padding: 2rem;
        }
        .background_and .background_and_top_title {
            font-size: 1.4rem;
        }
        .system_Components {
            padding: 4rem 0;
        }
        .system_Components .system_Components_title {
            font-size: 2.8rem;
            margin-bottom: 2rem;
        }
        .system_Components .system_Components_right {
            gap: 2rem;
        }
        .system_Components .system_cont .system_cont_title {
            font-size: 1.8rem;
            margin-bottom: 1.2rem;
        }
        .system_Components .system_cont ul {
            gap: 0 2rem;
        }
        .system_Components .system_cont ul li {
            font-size: 1.4rem;
            line-height: 2.4rem;
        }
        .system_Components .system_img {
            height: 14rem;
            width: 14rem;
        }
        .device_plan {
            padding: 4rem 0;
        }
        .device_plan .device_plan_title {
            font-size: 2.8rem;
            margin-bottom: 3rem;
        }
        .device_plan .device_plan_nav {
            margin-bottom: 3rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 1.4rem 2rem;
            font-size: 1.4rem;
        }
        .device_platform {
            padding: 4rem 0;
        }
        .device_platform .device_platform_title {
            font-size: 2.8rem;
            margin-bottom: 3rem;
        }
    }

    @media (max-width: 767px) {
        .system_contnc{
     display:flex;align-items:center;  justify-content: center;flex-wrap: wrap;gap:0 3rem
 }
        .background_and {
            padding: 3rem 0;
        }
        .background_and .background_and_title {
            font-size: 2.4rem;
            margin-bottom: 2rem;
        }
        .background_and .background_and_top li,
        .background_and .background_and_bom li {
            font-size: 1.4rem;
            line-height: 2rem;
        }
        .background_and .background_and_item_left {
            padding: 2rem;
        }
        .background_and .background_and_item_left li {
            font-size: 1.4rem;
            line-height: 2rem;
        }
        .system_Components {
            padding: 3rem 0;
        }
        .system_Components .system_Components_title {
            font-size: 2.4rem;
            margin-bottom: 2rem;
        }
        .system_Components .system_Components_nav_item {
            padding: 1.5rem 1rem;
            font-size: 1.4rem;
        }
        .system_Components .system_Components_right {
            flex-direction: column;
            gap: 2rem;
            padding: 2rem;
        }
        .system_Components .system_cont ul {
            grid-template-columns: 1fr;
        }
        .system_Components .system_cont ul li {
            line-height: 2.2rem;
        }
        .system_Components .system_img {
            height: 16rem;
            width: 16rem;
        }
        .device_plan {
            padding: 3rem 0;
        }
        .device_plan .device_plan_title {
            font-size: 2.4rem;
            margin-bottom: 2rem;
        }
        .device_plan .device_plan_nav {
            margin-bottom: 2rem;
        }
        .device_plan .device_plan_nav_item {
            padding: 1.2rem 1.8rem;
            font-size: 1.4rem;
        }
        .device_platform {
            padding: 3rem 0;
        }
        .device_platform .device_platform_title {
            font-size: 2.4rem;
            margin-bottom: 2rem;
        }
        .device_platform .device_platform_list {
            grid-template-columns: 1fr;
        }
        .device_platform .device_platform_item_title {
            font-size: 1.4rem;
        }
        .device_platform .device_platform_item_folt li {
            font-size: 1.4rem;
            line-height: 2rem;
        }
    }