.about-menu {
  padding: 30px 0;
  text-align: center;
  border-bottom: 1px solid #e3e3e3;
  background: #fff;
}

.about-menu ul {
     margin: 0 auto;
    width: 90%;
    font-size: 0;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.about-menu ul li {
  height: 46px;
  line-height: 46px;
  display: inline-block;
  margin: 0 10px;
  margin-top: 10px;
}

.about-menu ul li a {
  font-size: 18px;
  color: #333;
  display: block;
  padding: 0 48px;
  background: #eaeaea;
  line-height: 46px;
  border-radius:30px;
}

.about-menu ul li.active a {
  background: var(--color-primary);
  color: #fff;
}

@media screen and (max-width: 768px) {
  .about-menu {
    padding: 20px 0 15px;
  }

  .about-menu ul li {
    height: 36px;
    line-height: 36px;
    margin: 0 15px 15px;
  }

  .about-menu ul li a {
    font-size: 14px;
    padding: 0 30px;
  }
}