.pro_nav_box{
    width: 100%;
}
.pro_nav{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: space-between;
}
.pro_nav_left{
    width: 75%;
    height: 100%;
    display: flex;
    justify-content: space-between;
}
.pro_nav_left_item{
    width: 33.333333333%;
    height: 100%;
    position: relative;
}

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

.pro_nav .mask{
    width: 100%;
    height: 100%;
    background-color: #00000050;
    padding-top: calc(75px + 10rem);
}
.pro_nav .mask .pro_nav_icon{
    width: calc(20px +3rem);
   
}
.pro_nav .mask .p1{
    font-size: calc(2px + 1.5rem);
    font-weight: 700;
    color: #ffffff;
    text-align: center;
}

.pro_second_nav{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
}

.pro_second_nav{
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: calc(3px + 0.5rem);
    padding-top: calc(55px + 20rem);
    transition: .5s;
    opacity: 0;
}

.pro_second_nav .pro_second_nav_item{
font-size: calc(6px + 0.5rem);
color: #ffffff;
}

.pro_nav_left_item .mask:hover .pro_second_nav{
    opacity: 1;
    padding-top: calc(15px + 20rem);
    background-color: #00000060;
}

.pro_nav_right{
    width: 25%;
}
.pro_nav_right_item{
    width: 100%;
    height: 50%;
    position: relative;
}
.pro_nav_right_item_pic{
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media screen and (max-width: 1100px){
    .pro_nav{
        flex-direction: column;
        justify-content: flex-start;
    }
    .pro_nav_left{
        width: 100%;
        height: auto;
        flex-direction: column;
        justify-content: flex-start;
    }
    .pro_nav_left_item{
        width: 100%;
        height: calc(80px + 86rem);
    }
    .pro_nav .mask .p1{
        font-size: calc(16px + 1rem);
    }
    .pro_second_nav .pro_second_nav_item{
        font-size: calc(10px + 1rem);
    }
    .pro_second_nav{
        opacity: 1;
        padding-top: calc(55px + 29rem);
    }
    .pro_nav_left_item_pic {
        height: calc(80px + 86rem);
    }
    .pro_nav_right{
        width: 100%;
        
    }
}