.idx-title {
  margin-bottom: 3%;
  text-align: center;
  color: #333;
  font-size: 50px;
  line-height: normal;
  letter-spacing: 0.2rem;
}
.idx-title::after {
  content: "";
  width: 125px;
  height: 3px;
  margin: 5px auto;
  display: block;
  background-color: #46cbca;
}

.idx-btn {
  width: 200px;
  height: 60px;
  margin: 50px auto 0;
  display: block;
  background: #fff;
  color: #000;
  text-align: center;
  border: 1px solid #000;
  font-weight: bold;
  font-size: 22px;
  line-height: 60px;
  -webkit-transition: 0.3s ease;
  transition: 0.3s ease;
}
.idx-btn:hover {
  background: #333;
  border: 1px solid #333;
  color: white;
  -webkit-transform: translateY(-15px);
          transform: translateY(-15px);
}

.idx-bg01, .idx-bg02 {
  height: 678px;
  width: 770px;
  position: absolute;
  left: 0;
  top: 0;
  background: url(/images/bg01.jpg) top left no-repeat;
  background-size: contain;
}

.idx-bg02 {
  right: 0;
  left: auto;
  background: url(/images/bg01.jpg) top right no-repeat;
  -webkit-transform: scaleX(-1);
          transform: scaleX(-1);
}

.idx-product {
  padding: 5% 0;
  position: relative;
}
.idx-product__bg {
  width: 0;
  height: 0;
  position: absolute;
  right: 0;
  top: 0;
  overflow: hidden;
}
.idx-product .product-box {
  margin: 15px;
}

.idx-intro {
  height: 445px;
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  background: url(/images/idx/idx-img.jpg) center no-repeat;
  background-size: cover;
}
.idx-intro p {
  padding: 20px;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  line-height: 34px;
}

.idx-knowledge {
  margin-top: 3%;
  padding-bottom: 5%;
  overflow: hidden;
  background: url(/images/idx/idx-knowledge-bg.jpg) right bottom no-repeat;
  background-size: contain;
}
.idx-knowledge__wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 0 20px;
}
.idx-knowledge .knowledge-btn {
  position: absolute;
  bottom: 0;
}

.idx-about {
  margin-top: 60px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.idx-about__block {
  width: calc(100% - 620px);
  margin-top: 4%;
}
.idx-about__box {
  padding: 35px;
  position: relative;
  float: right;
  background: #f6f6f6;
}
.idx-about__box::before {
  content: "";
  height: 40px;
  width: 100%;
  position: absolute;
  top: -13px;
  left: 0;
  background: url(/images/idx/idx-about__line.jpg) left center repeat-x;
}
.idx-about__img {
  width: 620px;
}
.idx-about__text {
  letter-spacing: 0.08rem;
  line-height: 32px;
}
.idx-about__title {
  margin-bottom: 20px;
  margin-left: 30px;
  color: #200909;
  font-size: 38px;
}
.idx-about a {
  width: 145px;
  height: 50px;
  margin-top: 30px;
  display: block;
  background: #fff;
  border: 1px solid #000;
  float: right;
  color: #434343;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  line-height: 50px;
  -webkit-transition: 0.3s ease;
  transition: 0.3s ease;
}
.idx-about a:hover {
  background: #333;
  color: #fff;
  -webkit-transform: translateX(-10px);
          transform: translateX(-10px);
}

@media only screen and (max-width: 1500px) {
  .idx-bg01, .idx-bg02 {
    width: 48%;
  }
  .idx-intro {
    height: 400px;
  }
  .idx-intro p {
    font-size: 28px;
  }
}
@media only screen and (max-width: 1400px) {
  .idx-product .product-name {
    font-size: 24px;
  }
  .idx-knowledge__wrapper {
    grid-template-columns: repeat(1, 1fr);
    grid-gap: 10px 0;
  }
  .idx-knowledge .knowledge-img {
    width: 360px;
  }
  .idx-knowledge .knowledge-text {
    width: calc(100% - 380px);
  }
}
@media only screen and (max-width: 1300px) {
  .idx-title {
    font-size: 40px;
  }
  .idx-knowledge .knowledge-detail {
    -webkit-line-clamp: 2;
  }
  .idx-product {
    padding: 5%;
  }
  .idx-intro {
    height: 300px;
  }
  .idx-intro p {
    font-size: 26px;
  }
}
@media only screen and (max-width: 1200px) {
  .idx-about__img {
    width: 50%;
  }
  .idx-about__block {
    width: 50%;
  }
}
@media only screen and (max-width: 1024px) {
  .idx-about__title {
    font-size: 34px;
  }
}
@media only screen and (max-width: 980px) {
  .idx-product {
    padding: 50px 2%;
  }
  .idx-product .product-name {
    font-size: 22px;
  }
  .idx-product .product-text {
    font-size: 16px;
    line-height: 24px;
  }
  .idx-btn {
    width: 160px;
    height: 55px;
    margin: 60px auto 0;
    font-size: 20px;
    line-height: 55px;
  }
  .idx-intro {
    background-position: right center;
  }
}
@media only screen and (max-width: 800px) {
  .idx-about {
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
  }
  .idx-about__box {
    padding: 8% 6%;
  }
  .idx-about__img {
    width: 80%;
    margin: 0px auto;
    text-align: center;
  }
  .idx-about__block {
    width: 100%;
    margin-top: 0;
  }
  .idx-about__title {
    margin: 20px auto;
    text-align: center;
    font-size: 32px;
  }
}
@media only screen and (max-width: 768px) {
  .idx-knowledge .knowledge-btn {
    margin-top: 20px;
    position: static;
  }
  .idx-knowledge .knowledge-text {
    margin-left: 20px;
  }
}
@media only screen and (max-width: 700px) {
  .idx-knowledge .knowledge-img {
    width: 100%;
  }
  .idx-knowledge .knowledge-text {
    width: 100%;
    margin-left: 0;
    margin-top: 10px;
  }
}
@media only screen and (max-width: 640px) {
  .idx-intro p {
    font-size: 24px;
  }
  .idx-about__img {
    width: 100%;
  }
  .idx-title {
    margin-bottom: 7%;
  }
}
@media only screen and (max-width: 375px) {
  .idx-about__title {
    font-size: 36px;
  }
  .idx-title::before {
    width: 30px;
    height: 6px;
  }
}