.banner-tarja {
  width: 100%;
  height: 150px; /* altura da tarja */
  background-image: url('https://i.postimg.cc/Hn5Zh2L2/Sem-t-tulo-1.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: 8px; /* opcional */
}