.lower-introduction .container {
  position: relative;
}
@media (min-width: 768.1px) {
  .lower-introduction .container {
    padding-inline: 16%;
  }
}
.lower-introduction .container::before {
  content: "";
  position: absolute;
  inset: -12em 20px 0;
  display: block;
  max-height: 350px;
  margin-inline: auto;
  background-image: url(../images/materials_headImg01.png), url(../images/materials_headImg02.png);
  background-repeat: no-repeat;
  background-position: top left 12%, top right 12%;
  background-size: 8% auto, 13% auto;
}/*# sourceMappingURL=materials.css.map */