.case .l,
.case .r {
  width: 46%;
}

.case_detailsbox {
  padding: 120px 0;
  box-sizing: border-box;
  background-image: url(../image/case/67173bafd5db6f97b86b39d0cf9c657.png);
  background-position: center center;
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.case .l h4::after {
  content: " ";
  display: block;
  margin: 60px 0 0 0;
  width: 10%;
  height: 6px;
  background: #3F8E4D;
}

.case .l span {
  line-height: 35px;
}

.case .l {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case .r {
  display: flex;
  align-items: center;
  justify-content: center;
}

.case .r img {
  display: block;
  max-width: 100%;
  height: auto;
}

@media screen and (max-width: 1680px) {
  .case_detailsbox {
    padding: 110px 0;
  }

  .case .l h4 {
    font-size: 24px;
  }

  .case .l h4::after {
    margin: 50px 0 0 0;
  }

  .case .l span {
    line-height: 30px;
  }
}

@media screen and (max-width: 1600px) {
  .case_detailsbox {
    padding: 100px 0;
  }

  .case .l h4 {
    font-size: 22px;
  }

  .case .l h4::after {
    margin: 40px 0 0 0;
  }

  .case .l span {
    line-height: 25px;
  }
}

@media screen and (max-width: 1440px) {
  .case_detailsbox {
    padding: 90px 0;
  }

  .case .l h4 {
    font-size: 20px;
  }

  .case .l h4::after {
    margin: 30px 0 0 0;
  }

  .case .l span {
    line-height: 20px;
  }
}

@media screen and (max-width: 1366px) {
  .case_detailsbox {
    padding: 80px 0;
  }

  .case .l h4 {
    font-size: 18px;
  }

  .case .l h4::after {
    margin: 20px 0 0 0;
  }

  .case .l span {
    line-height: 20px;
  }
}

@media screen and (max-width: 1280px) {
  .case_detailsbox {
    padding: 70px 0;
  }

  .case .l h4 {
    font-size: 16px;
  }

  .case .l h4::after {
    margin: 15px 0 0 0;
  }

  .case .l span {
    font-size: 14px;
  }
}

@media screen and (max-width: 1024px) {
  .case_detailsbox {
    padding: 60px 0;
  }

  .case .l span {
    font-size: 14px;
  }
}

@media screen and (max-width: 980px) {
  .case_detailsbox {
    padding: 50px 0;
  }

  .case .l span {
    line-height: 1.5;
  }

  .case .l,
  .case .r {
    width: 100%;
  }

  .case {
    flex-wrap: wrap;
  }

  .case .l span {
    display: block;
    margin: 15px 0;
  }
}

@media screen and (max-width: 768px) {
  .case_detailsbox {
    padding: 40px 0;
  }

  .case .l span {
    line-height: 1.3;
  }
}

@media screen and (max-width: 640px) {
  .case_detailsbox {
    padding: 30px 0;
  }
}

@media screen and (max-width: 375px) {
  .case_detailsbox {
    padding: 20px 0;
  }
}