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

.st-def-section img {
    width: 100%;
}

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

.st-def-section .section-title {
    color: #295693;
    padding: 30px 0px;
}

.surfaceTreatment-img img {
    border: 1px solid #000;
    height: 100%;
}

.st-details-section {
    /*background: url(../images/surfaceTreatment/POWDERCOATING004.jpg) rgb(0 0 0 / 62%);*/
    position: relative;
}
.st-details-section:before {
    content: "";
    background: url(../images/ourprocess/dia-maintenance-bg.png);
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background-size: contain;
    right: 0;
    background-repeat: no-repeat;
}

.st-block {
    background: #9f9f9f;
    display: flex;
    flex-direction: column;
    margin: 20px 0px 9px;
    padding: 12px 0px;
    border: 1px solid #FFF;
    transition: 0.5s;
    cursor: default;
}
.st-block:hover {
    background: #295693;
}

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

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

.st-block p {
    color: #fff;
    margin: 0px;
    text-align: center;
}