.about_hero_sec{
    background-position: top center;
}
.about_img_card{
    background:url(../img/about/about_dots.png) right center/ auto 50% no-repeat;
}

@media(min-width:992px){
    .line_left_center{
        position: relative;
        z-index: 2;
    }
    .line_left_center::before,
    .line_right::before{
        content:"";
        display: block;
        width:2px;
        position: absolute;
        z-index: -1;
        background-color:rgba(255, 255, 255, 0.12);
        -webkit-user-select: none;
           -moz-user-select: none;
            -ms-user-select: none;
                user-select: none;
        pointer-events: none;
    }
    .line_left_center::before{
        height: 180%;
        left: 25%;
        top:0px;
    }
    .line_right{
        position: relative;
        z-index: 1;
    }
    .line_right::before{
        height: 130%;
        left: 95%;
        top:0px;
    }
}