.kaso-top {
  position: relative;
  background-image: url(../images/project/mv.jpg);
  background-size: cover;
  background-position: center 0;
  background-repeat: no-repeat;
  padding-top: 33.8%;
  margin-bottom: 120px;
}
@media screen and (max-width: 768px) {
  .kaso-top {
    margin-bottom: 30px;
  }
}
.fs-x20 {
  font-size: 2rem;
}
@media screen and (max-width: 768px) {
  .fs-x20 {
    font-size: 1.8rem;
  }
}
.project-img {
  margin: 80px auto 95px;
}
@media screen and (max-width: 768px) {
  .project-img {
    margin: 40px auto 65px;
  }
}