.bd-placeholder-img {
        font-size: 1.125rem;
        text-anchor: middle;
        -webkit-user-select: none;
        -moz-user-select: none;
        user-select: none;
      }

      @media (min-width: 768px) {
        .bd-placeholder-img-lg {
          font-size: 3.5rem;
        }
      }
      .banner1 {
        padding: 80px;
      	background-repeat: no-repeat; 
      	background-image: url("https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/GMAW.welding.af.ncs.jpg/1200px-GMAW.welding.af.ncs.jpg");
      	background-size: cover; 
      	background-position: bottom; 
      	width: 100%; height: 200px; opacity: 1; visibility: inherit; z-index: 20;
      }
      .banner2 {
        background-repeat: no-repeat; 
        background-image: url("https://maxtelhados.com.br/wp-content/uploads/2020/04/serralheria.jpg");
        background-size: cover; 
        background-position: center; 
        width: 100%; height: 820px; opacity: 1; visibility: inherit; z-index: 20;
      }
      .mt-20-vh {
        margin-top: 20vh;
      }