.md-about-51 .border-red {
  margin-top: 0;
}
.md-about-51 .box {
  margin-top: 70px;
  margin-bottom: 30px;
}
.md-about-51 .box-left {
  width: calc( 590 / 1170 * 100%);
}
.md-about-51 .box-right {
  width: calc( 530 / 1170 * 100%);
  padding-top: 30px;
}
.md-about-51 .box-right img {
  width: 100%;
}
.md-about-51 .content {
  line-height: calc(40 / 16);
  line-height: 2;
}
.md-about-51 .nlist {
  margin-top: 39px;
}
.md-about-51 .ni {
  line-height: 2;
  font-size: 18px;
}
.md-about-51 .ni .n11 img {
  margin-bottom: 4px;
}
.md-about-51 .ni .n12 {
  color: var(--active);
  margin-bottom: 14px;
}
.md-about-51 .ni .n13 {
  font-size: 16px;
}
@media screen and (min-width: 768px) {
  .md-about-51 .text-box {
    padding-left: 30px;
  }
}
@media screen and (max-width: 767px) {
  .md-about-51 .box-left {
    width: 100%;
  }
  .md-about-51 .box-right {
    width: 100%;
  }
  .md-about-51 .nlist {
    flex-wrap: wrap;
  }
  .md-about-51 .ni {
    width: 100%;
    margin-bottom: 30px;
  }
}