.section {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  margin: 5rem 0;
  padding: 0 1rem;
}
.gallery-title11 {
  margin: 0 auto 6rem;
  font-weight: 600;
  font-size: 3rem;
  color: #0f4c75;
}
.gallery-title {
  margin: auto;
  font-weight: 500;
  font-size: 2.5rem;
  color: #0f4c75;
}
.swiper {
  width: 100%;
  padding-top: 3.125rem;
  padding-bottom: 3.125rem;
}
.swiper-slide {
  background-position: center;
  background-size: cover;
  width: 25rem;
  height: 20rem;
  border-radius: 1.25rem;
}
.swiper-slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 1.25rem;
}

/* Top btn */
#back-to-top {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  background-color: #0f4c75;
  color: #fff;
  border-radius: 50%;
  font-size: 1.25rem;
  text-decoration: none;
  z-index: 1000;
}
#back-to-top:hover {
  background-color: #11999e;
}