.rnd {
  position: relative;
  padding-top: 10rem;
  padding-bottom: 10rem;
}
@media screen and (max-width: 1024px) {
  .rnd {
    padding-top: 6rem;
    padding-bottom: 6rem;
  }
}
.rnd__text {
  margin-top: 3rem;
  font-size: 1.8rem;
  color: #000000;
  line-height: 1.4;
  text-align: center;
}
.rnd__info {
  display: flex;
  justify-content: center;
  margin-top: 4.4rem;
}
.rnd__info__item {
  position: relative;
  width: 100%;
  max-width: 20.5rem;
  padding: 2.5rem;
  border: 1px solid #ddd;
  border-radius: 10px;
  margin-left: 0.5rem;
  margin-right: 0.5rem;
  font-size: 1.8rem;
  color: #000000;
  text-align: center;
}
.rnd__info__item img {
  width: 100%;
  max-width: 10.7rem;
  height: auto;
}
.rnd__info__item:first-of-type {
  margin-left: 0;
}
.rnd__info__item:first-of-type::after {
  content: "";
  display: block;
  position: absolute;
  top: 50%;
  right: -2.2rem;
  transform: translateY(-50%);
  width: 3.2rem;
  height: 3.2rem;
  background-image: url(/imgs/rnd/rnd_img3.svg);
  background-size: 100% auto;
  background-repeat: no-repeat;
  background-position: 0 0;
  z-index: 2;
}
.rnd__info__item:last-of-type {
  margin-right: 0;
}
.rnd__info__item__text {
  margin-top: 1.8rem;
}
.rnd__section {
  margin-top: 10rem;
}
@media screen and (max-width: 1024px) {
  .rnd__section {
    margin-top: 6rem;
  }
}
.rnd__address {
  position: relative;
  text-align: center;
  margin-top: 3rem;
}
.rnd__address__image {
  text-align: center;
  margin-bottom: 3rem;
}
.rnd__address__image img {
  max-width: 100%;
  border-radius: 10px;
}
.rnd__address__text {
  display: inline-block;
  text-align: left;
}
.rnd__address__text p + p {
  margin-top: 1rem;
}
.rnd__address__text span {
  display: inline-block;
  position: relative;
  padding-left: 1.1rem;
  font-size: 1.8rem;
  color: #000000;
}
.rnd__address__text span::before {
  content: "";
  display: block;
  position: absolute;
  top: 0.8rem;
  left: 0;
  width: 0.5rem;
  height: 0.5rem;
  background-color: #56A9C4;
  border-radius: 100%;
}
.rnd .rnd-history {
  position: relative;
  margin-top: 5rem;
}
.rnd .rnd-history__item {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  padding-bottom: 4rem;
  margin-top: 4rem;
  border-bottom: 1px solid #DBE7EE;
}
.rnd .rnd-history__item:first-of-type {
  margin-top: 0;
}
@media screen and (max-width: 800px) {
  .rnd .rnd-history__item {
    flex-direction: column;
  }
}
.rnd .rnd-history__year {
  flex: none;
  font-weight: 700;
  font-size: 2.4rem;
  color: #000000;
  width: 40rem;
}
@media screen and (max-width: 800px) {
  .rnd .rnd-history__year {
    width: 100%;
  }
}
@media screen and (max-width: 800px) {
  .rnd .rnd-history__text {
    margin-top: 2rem;
  }
}
.rnd .rnd-history__text ul li {
  position: relative;
  padding-left: 1.2rem;
  font-size: 1.8rem;
  color: #000000;
}
.rnd .rnd-history__text ul li::before {
  content: "";
  display: block;
  position: absolute;
  top: 0.8rem;
  left: 0;
  width: 0.3rem;
  height: 0.3rem;
  background-color: #8B8B8B;
  border-radius: 100%;
}

.certificate {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 5rem;
  gap: 4.5rem;
}
@media screen and (max-width: 800px) {
  .certificate {
    grid-template-columns: repeat(2, 1fr);
  }
}
.certificate__item {
  position: relative;
}
.certificate__image {
  position: relative;
  width: 100%;
}
.certificate__image img {
  width: 100%;
}
.certificate__desc {
  position: relative;
  margin-top: 2rem;
  text-align: center;
}
.certificate__subject {
  font-weight: 700;
  font-size: 1.8rem;
  color: #000000;
}
.certificate__date {
  margin-top: 1.5rem;
  font-size: 1.4rem;
  color: #000000;
}