#partners h2 {
  margin-bottom: 30px;
  text-align: center;
}

.partner {
  width: 25%;
  float: left;
  text-align: center;
  padding: 10px;
  box-sizing: border-box;
}

.partner img {
  display: block;
  margin: auto;
  max-width: 100%;
  height: auto;
}

@media (max-width: 768px) {
  .partner {
    width: 50%;
  }
}