.banner-maina{
    width: 370px;
    height: auto;
    margin-top: 3rem;
}
@media(max-width: 768px){
    .banner-maina{
        width: 100%;
    }
    .mainVisual .textBox h2 {
        font-size: 2.25rem;
        letter-spacing: 0.05em;
      }
    .comTxt {
        font-size: 2.25rem;
	}
}