.rbm_sust {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  background: url('https://via.placeholder.com/1200x400/white?text=Marble+Background') repeat;
  padding: 40px 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rbm_sust-item {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0;
  width: 100%;
  max-width: 1000px;
}

.rbm_sust-image {
  width: 600px;
  height: auto;
  border-radius: 10px;
  margin-right: 20px;
}

.rbm_sust-text {
  color: #4b5da0;
  font-size: 25px;
  font-weight: bold;
  text-align: center;
  padding: 15px;
  border-radius: 8px;
  flex: 1;
}

.rbm_sust-text p {
  margin: 0;
}

@media (max-width: 768px) {
  .rbm_sust {
    padding: 20px 10px;
  }
}

@media (max-width: 768px) {
  .rbm_sust-item {
    flex-direction: column-reverse;
    max-width: 300px;
    margin: 10px 0;
    padding: 0;
  }
}

@media (max-width: 768px) {
  .rbm_sust-image {
    width: 100%;
    max-width: 300px;
    margin: 0;
  }
}

@media (max-width: 768px) {
  .rbm_sust-text {
    font-size: 1.2em;
    padding: 5px;
    width: 100%;
    max-width: 300px;
    color: #4b5da0;
    margin: 0;
  }
}