.banner.pagina_fundicao_aluminio {
    background-image: url(../imgs/bannerFundiçãoAluminio.png);
    background-size: cover;
    padding-bottom: 400px;
}
.banner.pagina_usinagem {
    background-image: url(../imgs/banner_usinagem.png);
    background-size: cover;
    padding-bottom: 400px;
}
.banner.pagina_ferramentaria {
    background-image: url(../imgs/banner_ferramentaria.png);
    background-size: cover;
    padding-bottom: 400px;
}
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333;
  background-color: #f9f9f9;
}

h1, h2, h3 {
  color: #222;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}

h1 {
  font-size: 2em;
}

h2 {
  font-size: 1.6em;
}

h3 {
  font-size: 1.3em;
}

p {
  margin-bottom: 1em;
  text-align: justify; 
}

.estiloHR3{
    border: none;
    height: 3px;
    background-color: red;
    width: 25%;
    opacity: initial;
    margin: 0 auto;
}

@media (max-width: 767px) {
    body {
        text-align: center;
    }
    .estiloHR1 {
        width: 100%;
    }
    .banner.pagina_ferramentaria {
        padding-bottom: 0px;
    }
    .banner.pagina_usinagem {
        padding-bottom: 0px;
    }
    .banner.pagina_fundicao_aluminio {
        padding-bottom: 0px;
    }
    .estiloHR3 {
        width: 100%;
    }
    
}