#about {
    background-color: #ffffff;
    display: flex;
    flex-wrap: wrap;
    height: auto; 
    padding: 15% 16px;
}

.calcular-aqui {
    text-align: center;
}

.calcular-aqui h2 {
    font-size: 20px;
    margin: 25px auto 18px;
}

#about .text-about p {
    line-height: 23px;
    padding: 0;
}

.about-principal {
    padding-bottom: 15px !important;
}

#about .img-about img {
    max-width: 100%  
}

.calcular-aqui .down-arrow {
    animation: 2s rebote infinite;
    width: 15%;
}

@keyframes rebote {
    20%, 50% {
        transform: translateY(0);
    } 
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-15px);
    }
}