.why-choose-procedure ul {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  justify-content: center;
}

.why-choose-procedure ul li {
  flex: 0 0 calc(33.333% - 13.34px);
}

.why-choose-procedure ul li:nth-child(n+4) {
  flex: 0 0 calc(30% - 10px); 
}