.alt-header-section {
    background: url(../images/tech-eng/sub_assemblies_banner.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-blend-mode: overlay;
    min-height: 87vh;
    justify-content: center;
    display: flex;
    flex-direction: column;
}

.alt-def-section img {
    width: 100%;
    height: 100%;
    min-width: 200px;
    min-height: 212px;
}

.background-mech {
    /*background: url(../images/ourprocess/GrayBackground.jpg);*/
    background-repeat: no-repeat;
    background-size: cover;
    background-color: #dadada;
}

.alt-def-section .section-title {
    color: #295693;
    padding: 40px 0px;
}

.surfaceTreatment-img img {
    border: 1px solid #000;
}

.alt-block {
    background-color: #9f9f9f;
    transition: 0.5s;
    border: 1px solid #FFF;
}
.alt-block:hover {
    background: #295693;
}

.alt-block h3 {
    font-size: 4rem;
    color: #fff;
    font-weight: bold;
    text-align: center;
}

.alt-block .bold {
    font-weight: bold;
    text-align: center;
}

.alt-block p {
    color: #fff;
    margin: 0px;
    text-align: center;
        font-size: 14px
}



 .overlay {
                position: absolute;
                top: 30%;
                left: 0;
                right: 0;
                text-align: center;
                display: flex;
                flex-direction: row;
                justify-content: center;
                align-items: center;
                transition: 1s;
            }
            .overlay .fa {
                opacity: 0;
                transition: 1s;
            }
		    a.certificates-gallery:hover .overlay {
                top: 0;
                transition: 1s;
                background: #e3dfdfad;
                height: 100%;
            }
            a.certificates-gallery:hover .overlay .fa {
                opacity: 1;
                transition: 1s;
            }
            
            .assemblies-leak-testing-slider-1.owl-carousel .owl-item img { width: 100%; margin: 0 auto; }
            
            .assemblies-leak-testing-slider-2.owl-carousel .owl-item img {
			    width: 100% !IMPORTANT;
			    min-height: auto;
			    margin: 0 auto;
			    max-width: unset !important;
			    min-width: auto;
			    height: 227px !important;
			    object-fit: cover;
			}
            
            .assemblies-leak-testing-slider-2.owl-carousel .owl-item .item {
                background-color: #fff;
                padding: 58px 0;
            }
            
            .alt-header-section { position: relative; z-index: 1; }
            .alt-header-section:after {
                content: "";
                position: absolute;
                left: 0;
                right: 0;
                top: 0;
                bottom: 0;
                background-color: rgb(0 0 0 / 40%);
                z-index: -1;
            }
            
            /*.assemblies-leak-testing-slider-1.owl-carousel .owl-item {
                border: 2px solid #fff;
            }
            .assemblies-leak-testing-slider-2.owl-carousel .owl-item {
                border: 2px solid #ccc;
            }*/
            
            .owl-carousel .owl-dots { text-align: center; }
            .owl-carousel button.owl-dot.active span {
                background-color: #000;
            }
            .owl-carousel button.owl-dot span {
                border: 1px solid #000;
                width: 10px;
                height: 10px;
                border-radius: 100%;
                display: inline-block;
                margin: 0 3px;
            }