.strength_nav {
    width: 100%;
    padding: calc(20px + 2rem) 0;
}

.why_box {
    width: 100%;
    background: #F8F8F8;
    padding: calc(20px + 4rem) 0;
}

.why {
    max-width: 1480px;
    width: 85%;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.why_left {
    width: 49.4594%;
    display: grid;
    grid-template-columns: 48.6338% 48.6338%;
    gap: calc(10px + 0.5rem);
}

.why_left_pic {
    width: 100%;
    height: calc(42px + 10rem);
}

.why_left_pic:nth-of-type(1) {
    height: calc(106px + 20rem);
    grid-row-start: 1;
    grid-row-end: 3;
}

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

.why_right {
    width: 43.3108%;
}

.why_content {
    margin-top: calc(6px + 2rem);
}

.why_content p {
    font-family: OPPOSans-R;
    font-weight: 400;
    font-size: calc(6px + 0.5rem);
    color: #333333;
    line-height: calc(2px + 1.5rem);
}

.contact_us {
    width: calc(80px + 5rem);
    height: calc(20px + 2rem);
    background: #00529D;
    border-radius: calc(10px + 1rem);
    margin-top: calc(7px + 1.5rem);
}

.contact_us a {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: OPPOSans-R;
    font-weight: normal;
    font-size: calc(6px + 0.5rem);
    color: #FFFFFF;
}

.card_box {
    width: 100%;

    background: url(../image/card_bg.png) no-repeat;
    background-size: cover;

}

.card_box {
    display: flex;
    justify-content: space-between;
}
.card_box1{
    width: 100%;

    background: url(../image/card_bg.png) no-repeat;
    background-size: cover;
}
.card_box1{
    display: none;
}
.card_box{
    display: flex;
}
.card {
    width: 25.4427%;
    height: 100%;
    border-right: 1px #ffffff50 solid;
    transition: .5s;
    cursor: pointer;
    padding-left: calc(9px + 3rem);
    padding-bottom: calc(12px + 4rem);
}

.card_act {
    width: 49.1145%;
    background-color: #151D2550;
    padding-left: calc(20px + 10rem);
}

.card:nth-of-type(1) p:nth-of-type(3) {
    opacity: 1;
}


.card p:nth-of-type(1) {
    font-family: OPPOSans-B;
    font-weight: bold;
    font-size: calc(8px + 2rem);
    color: #00529D;
    line-height: 1;
    opacity: 0.4;
    margin-top: calc(47px + 5rem);
}

.card p:nth-of-type(2) {
    font-family: OPPOSans-B;
    font-weight: bold;
    font-size: calc(4px + 1rem);
    color: #FFFFFF;
    line-height: 1;
    margin-top: calc(6px + 1rem);
}

.card p:nth-of-type(3) {
    font-family: OPPOSans-R;
    font-weight: 400;
    font-size: calc(6px + 0.5rem);
    color: #FFFFFF;
    line-height: calc(2px + 1.5rem);
    width: calc(18px + 30rem);
    opacity: 0;
    transition: .5s;
    margin-top: calc(5px + 2rem);
    height: calc(20px + 4rem);
}

.card img {
    height: calc(20px + 4rem);
    margin-top: calc(45px + 2rem);
}

.factory_box {
    width: 100%;
    padding: calc(30px + 5rem) 0;
}

.factory {
    max-width: 1480px;
    width: 85%;
    margin: auto;
}

.factory_card_box {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    row-gap: calc(15px + 1rem);
    margin-top: calc(18px + 2rem);
}

.factory_card {
    width: 23.6486%;
}

.factory_pic {
    width: 100%;
    height: calc(36px + 10rem);
}

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

.factory_card p {
    font-family: OPPOSans-R;
    font-weight: 400;
    font-size: calc(0px + 1rem);
    color: #333333;
    text-align: center;
    margin-top: calc(5px + 0.5rem);
}

@media (max-width: 1100px) {
    .about_nav{
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        gap: calc(10px + 2rem);
    }

    .about_nav_item {
        width: 100%;
      border: none;
      padding: 0;
    }
    .about_nav_item:nth-of-type(1),.about_nav_item:nth-of-type(2),.about_nav_item:nth-of-type(3){
        padding: 0;
    }
    .about_nav_item img {
        width: calc(9px + 5rem);
    }
    .about_nav_item p:nth-of-type(1){
        font-size: calc(12px + 1rem);
    }
    .about_nav_item p:nth-of-type(2){
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }

    .why{
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        gap: calc(10px + 1rem);
    }
    .why_left{
        width: 100%;
    }
    .why_right {
        width: 100%;
    }
    .why_content p {
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }

    .contact_us a{
        font-size: calc(10px + 1rem);
    }

    .card_box{
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }

    .card {
        width: 100%;
    }

    .card p:nth-of-type(1) {
        font-size: calc(12px + 1rem);
    }
    .card p:nth-of-type(2){
        font-size: calc(12px + 1rem);
    }
    .card p:nth-of-type(3){
        width: 85%;
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }

    .factory_card {
        width: 48%;
    }
    .factory_card p{
        font-size: calc(10px + 1rem);
    }

    .card img {
      
        margin-top: calc(45px + 32rem);
    }
    .card p:nth-of-type(1) {
     
        margin-top: calc(0px + 5rem);
    }
    .factory_pic {
        height: calc(36px + 18rem);
    }
    .card_box{
        display: none;
    }
    .card_box1{
        display: block;
        padding: calc(20px + 1rem) calc(10px + 4rem);
    }
.card1{
    border-bottom: 1px #ffffff30 solid;
    padding-bottom: calc(10px + 2rem);
}
    .card_box1 p:nth-of-type(1){
        font-family: OPPOSans-B;
        font-weight: bold;
        font-size: calc(16px + 1rem);
        color: #00529D;
        line-height: 1;
        opacity: 0.4;
        margin-top: calc(27px + 1rem);
    }
    .card_box1 p:nth-of-type(2){
        font-family: OPPOSans-B;
        font-weight: bold;
        font-size: calc(12px + 1rem);
        color: #FFFFFF;
        line-height: 1.5;
        margin-top: calc(6px + 1rem);
    }
    .card_box1 p:nth-of-type(3){
        font-family: OPPOSans-R;
        font-weight: 400;
        font-size: calc(10px + 1rem);
        color: #FFFFFF;
        line-height: 1.5;
        width: 100%;
        margin-top: calc(5px + 2rem);
     
    }
    .card_box1 img{
        height: calc(20px + 8rem);
        margin-top: calc(25px + 1rem);
    }
}