#ExchibitionsWrap > hr {
  width: 58%;
  margin-top: 40px;
  margin-bottom: 40px;
}

#ChristmasWrap div.illus-wrap, #SarpenWrap div.illus-wrap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 10px;
}

@media (min-width: 768px) {
  #ChristmasWrap div.illus-wrap, #SarpenWrap div.illus-wrap {
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 27px;
  }
}