* {
        margin: 0;
        padding: 0;
    }
    
    #mainquality-container {
        margin-top: 3em;
        background-image: url(img/istockphoto-515602640-170667a.jpg);
        /* border: 1px red solid; */
        background-size: cover;
        background: black;
    }
    
    #box-container-1 {
        background: transparent;
    }
    
    #box-container-1::before {
        position: absolute;
        content: '';
        background: rgba(0, 0, 0, 1);
        z-index: -1;
    }
    
    #box-container {
        margin-top: 5em;
        margin-bottom: 3em;
    }
    
    #wpb_wrapper-box-1 {
        margin-top: 3em;
        margin-bottom: 4em;
    }