/*--------------------
about-nanofiber
--------------------*/
#about-nanofiber .inner {
  max-width: 1920px;
}
#about-nanofiber .h2-wrapper {
  margin-bottom: 41px;
}
#about-nanofiber .img1 {
  width: 493px;
  margin-bottom: 42px;
}
#about-nanofiber .img1 .d-pc {
  width: 100%;
  height: auto;
}
#about-nanofiber .img2 {
  width: 1134px;
}
#about-nanofiber .img2 .d-pc {
  width: 100%;
  height: auto;
}
#about-nanofiber .d-sp {
  display: none;
}
#about-nanofiber .description {
  max-width: 827px;
  margin-top: 102px;
  padding-left: 30px;
  padding-right: 30px;
}
@media screen and (min-width: 1440px) {
  #about-nanofiber .img1 {
    width: 34.2361%;
  }
  #about-nanofiber .img2 {
    width: 78.75%;
  }
}
@media screen and (max-width: 1174px) {
  #about-nanofiber .img2 {
    width: 96.5928%;
  }
}
@media screen and (max-width: 983px) {
  #about-nanofiber .img1 {
    width: 50%;
  }
}
@media screen and (max-width: 600px) {
  #about-nanofiber .h2-wrapper {
    margin-bottom: 56px;
  }
  #about-nanofiber .img1 {
    margin-bottom: 56px;
    max-width: 327px;
    width: 100%;
  }
  #about-nanofiber .img2 {
    max-width: 327px;
    width: 100%;
  }
  #about-nanofiber .d-pc {
    display: none;
  }
  #about-nanofiber .d-sp {
    width: 100%;
    display: block;
    height: auto;
    margin-left: auto;
    margin-right: auto;
  }
  #about-nanofiber .description {
    margin-top: 56px;
  }
}
@media screen and (max-width: 374px) {
  #about-nanofiber .inner {
    width: 87.2%;
  }
  #about-nanofiber .img1 {
    width: 100%;
  }
  #about-nanofiber .d-sp {
    width: 100%;
  }
  #about-nanofiber .description {
    padding-left: 0;
    padding-right: 0;
  }
}



/*--------------------
merit
--------------------*/
#merit .inner {
  max-width: 1920px;
}
#merit .h2-wrapper {
  margin-bottom: 64px;
}
#merit .item {
  display: flex;
  justify-content: space-between;
  width: 88.8888%;
  margin-left: auto;
  margin-right: auto;
  align-items: center;
}
#merit .item:not(:first-child) {
  margin-top: 142px;
}
#merit .item:nth-child(2n) {
  flex-direction: row-reverse;
}
#merit .item .left,
#merit .item .right {
  width: 45.8593%;
}
#merit .item h3 {
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 24px;
}
#merit .item h3 span {
  display: block;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: 0.03em;
  font-family: "Federo", sans-serif;
}
#merit .item h3 span::before {
  content: attr(data-text);
  font-size: 2.625rem;
}
#merit .item h3 span::after {
  content: attr(data-number);
  font-size: 4.5rem;
}
#merit .item .right h3 {
  text-align: right;
}
#merit .item img {
  width: 100%;
  height: auto;
}
#merit .item .d-sp {
  display: none;
}
#merit .h4-wrapper {
  margin-top: 120px;
}
#merit .h4-wrapper h4 {
  font-size: 1.5625rem;
  font-weight: 600;
  line-height: 1.6;
  text-align: center;
}
#merit .h4-wrapper h4::after {
  display: block;
  content: "";
  width: 38px;
  height: 3px;
  background-color: #fff;
  margin-left: auto;
  margin-right: auto;
  margin-top: 18px;
  margin-bottom: 51px;
}
#merit .h4-wrapper .description {
  text-align: center;
}
#merit .h4-wrapper .images {
  display: flex;
  justify-content: space-between;
  width: 88.8888%;
  margin-left: auto;
  margin-right: auto;
  margin-top: 32px;
}
#merit .h4-wrapper .images div {
  width: 44.7656%;
}
#merit .h4-wrapper .images img {
  display: block;
  width: 100%;
  height: auto;
}
#merit .h4-wrapper .images .d-sp {
  display: none;
}
@media screen and (max-width: 1000px) {
  #merit .item {
    display: block;
    max-width: 810px;
    width: 100%;
    box-sizing: border-box;
    padding-left: 30px;
    padding-right: 30px;
  }
  #merit .item .left,
  #merit .item .right {
    width: 100%;
  }
  #merit .item .left p,
  #merit .item .right p {
    margin-bottom: 32px;
  }
}
@media screen and (max-width: 600px) {
  #merit .h2-wrapper {
    margin-bottom: 56px;
  }
  #merit .item {
    width: 87.2%;
    padding-left: 0;
    padding-right: 0;
  }
  #merit .item:not(:first-child) {
    margin-top: 56px;
  }
  #merit .item h3 {
    font-size: 1.625rem;
    margin-bottom: 32px;
  }
  #merit .item h3 span::before {
    font-size: 2rem;
  }
  #merit .item h3 span::after {
    font-size: 3.875rem;
  }
  #merit .item .d-pc {
    display: none;
  }
  #merit .item .d-sp {
    display: block;
  }
  #merit .h4-wrapper {
    margin-top: 56px;
  }
  #merit .h4-wrapper .description {
    width: 86.9333%;
    text-align: left;
    margin-left: auto;
    margin-right: auto;
  }
  #merit .h4-wrapper .images {
    display: block;
    width: 100%;
  }
  #merit .h4-wrapper .images div {
    width: 100%;
  }
  #merit .h4-wrapper .images .merit4 {
    width: 88.2666%;
    margin-left: auto;
    margin-right: auto;
  }
  #merit .h4-wrapper .images .d-pc {
    display: none;
  }
  #merit .h4-wrapper .images .d-sp {
    display: block;
  }
}



/*--------------------
usage
--------------------*/
/*--------------------
development
--------------------*/
#usage .area {
  height: 3600px;
  margin-bottom: 100vh;
}
#usage .development .aaa {
  position: relative;
}
#usage .development .cont {
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
  width: 100%;
  height: 100vh;
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}
#usage .development .left {
  width: calc(90% - 522px);
  font-size: 16px;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  justify-content: center; /* 縦方向中央 */
  height: 100%; /* コンテナ全体を使う */
  position: relative;
}
#usage .development .left .h3-wrapper {
  display: flex;
  align-items: center;
}
#usage .development .left img {
  width: 74px;
  height: 74px;
  margin-right: 20px;
}
#usage .development .left p {
  margin-top: 14px;
  padding-left: 94px;
}
#usage .development .left .item {
  position: absolute;
  /* width: 40%; */
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  transition: opacity 0.3s ease-in-out;
}
#usage .development .left .item2, 
#usage .development .left .item3,
#usage .development .left .item4,
#usage .development .left .item5,
#usage .development .left .item6 {
  opacity: 0;
  visibility: hidden;
}
#usage .development .circle-container {
  width: 522px;
  height: 600px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
#usage .development .circle-group {
  position: relative;
  width: 522px;
  height: 577px;
  border-radius: 50%;
  transition: transform 0.5s;
}
#usage .development .border-circle {
  position: absolute;
  width: 369px;
  height: 369px;
  border: 1px solid #fff;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
#usage .development .circle {
  position: absolute;
  width: 167px;
  height: 167px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  transition: background-color 0.3s;
}
#usage .development .inner-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  width: 129px;
  height: 129px;
  border-radius: 50%;
  background-color: #E3F1FB;
  transition: transform 0.5s;
}
#usage .development .circle p {
  width: 100%;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  color: #3A7DC1
}
#usage .development .circle img {
  display: none;
  width: 74px;
}
#usage .development .active {
  width: 215px;
  height: 215px;
  margin-left: -24px;
  margin-top: -24px;
  transition: all 0.5s;
}
#usage .development .active .inner-circle {
  width: 155px;
  height: 155px;
  background-color: #3A7DC1;
  transition: all 0.5s;
}
#usage .development .active p {
  margin-top: 24px;
  color: #fff;
  padding-bottom: 13px;
}
#usage .development .active img {
  display: block;
  margin-bottom: 30px;
}
#usage .development .highlight {
  background-color: #3A7DC1;
  color: white;
}
@media screen and (max-width: 1000px) {
  #usage .development .cont {
    display: block;
    padding-top: 150px;
    padding-left: 0;
    padding-right: 0;
    position: relative;
  }
  #usage .development .left {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 87.2%;
    max-width: 600px;
    height: auto;
    background-color: rgba(58, 125, 193, 0.95);
    z-index: 9;
    padding-top: 32px;
    padding-bottom: 32px;
  }
  #usage .development .left .h3-wrapper {
    display: block;
  }
  #usage .development .left h3 {
    text-align: center;
  }
  #usage .development .left img {
    display: none;
  }
  #usage .development .left .item1 {
    position: relative;
  }
  #usage .development .left .item {
    transform: translateY(0);
  }
  #usage .development .left p {
    width: 86.0856%;
    padding-left: 0;
    margin-left: auto;
    margin-right: auto;
  }
  #usage .development .circle-container {
    width: 100%;
  }
}
@media screen and (max-width: 600px) {
  #usage .development .cont {
    padding-top: 74px;
  }
  #usage .development .left {
    bottom: 50px;
  }
}
/*--------------------
material
--------------------*/
#usage .material {
  max-width: 1920px;
  margin-top: 168px;
  padding-bottom: 120px;
}
#usage .material h3 {
  margin-bottom: 142px;
}
#usage .material .cards {
  width: 88.8194%;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
#usage .material .card1 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material1.jpg);
}
#usage .material .card2 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material2.jpg);
}
#usage .material .card3 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material3.jpg);
}
#usage .material .card4 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material4.jpg);
}
#usage .material .card5 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material5.jpg);
}
#usage .material .card6 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material6.jpg);
}
#usage .material .card7 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material7.jpg);
}
#usage .material .card8 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material8.jpg);
}
#usage .material .card9 {
  background:
    linear-gradient(to top, #5083C1 31%, rgba(80, 131, 193, 0) 76%),
    url(../img/nanofiber/material9.jpg);
}
#usage .material .card {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-sizing: border-box;
  width: 29.1634%;
  border-radius: 8px;
  aspect-ratio: 373 / 667;
  padding: 32px;
  background-size: cover;
  background-repeat: no-repeat;
}
#usage .material .card:nth-child(n+4):nth-child(-n+6) {
  margin-top: 64px;
  margin-bottom: 64px;
}
#usage .material h4 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}
#usage .material h4::before {
  display: block;
  content: attr(data-text);
  font-size: 3.75rem;
  font-weight: 400;
  font-family: "Federo", sans-serif;
  line-height: 1.3;
  letter-spacing: 0.03em;
  opacity: 0.5;
}
#usage .material .description {
  width: 88.8194%;
  margin-top: 64px;
}
#usage .material .description p:first-child {
  margin-bottom: 16px;
}
#usage .material .d-1000_701 {
  display: none;
}
@media screen and (max-width: 1000px) {
  #usage .material .card {
    width: 48.5%;
    height: 667px;
  }
  #usage .material .card:nth-child(n+3):nth-child(-n+9) {
    margin-top: 24px;
    margin-bottom: 0;
  }
  #usage .material .d-1000_701 {
    display: block;
  }
}
@media screen and (max-width: 700px) {
  #usage .material .cards {
    display: block;
    width: 87.2%;
    max-width: 500px;
  }
  #usage .material .card {
    width: 100%;
  }
  #usage .material .d-1000_701 {
    display: none;
  }
  #usage .material .card:nth-child(n+2):nth-child(-n+9) {
    margin-top: 24px;
  }
  #usage .material .description {
    width: 87.2%;
    max-width: 500px;
  }
}
@media screen and (max-width: 600px) {
  #usage .material {
    padding-bottom: 0;
  }
  #usage .material h3 {
    margin-bottom: 32px;
  }
  #usage .material .description {
    margin-top: 32px;
  }
}
/*--------------------
case-study
--------------------*/
#usage .case-study {
  padding-top: 80px;
  padding-bottom: 120px;
  max-width: 1920px;
}
#usage .case-study h3 {
  margin-bottom: 64px;
}
#usage .case-study .cards {
  width: 88.8%;
  display: flex;
  justify-content: space-between;
}
#usage .case-study .card {
  width: 45.8593%;
  max-width: 800px;
}
#usage .case-study .card div:not(:first-child) {
  margin-top: 32px;
}
#usage .case-study .card h4 {
  font-size: 1.5625rem;
  font-weight: 600;
  line-height: 1.6;
  text-align: center;
}
#usage .case-study .card h4::after {
  display: block;
  content: "";
  width: 38px;
  height: 3px;
  background-color: #fff;
  margin-top: 16px;
  margin-bottom: 17px;
  margin-left: auto;
  margin-right: auto;
}
#usage .case-study .d-sp {
  display: none;
}
@media screen and (max-width: 1733px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 32px;
  }
}
@media screen and (max-width: 1691px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 0;
  }
}
@media screen and (max-width: 1397px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 32px;
  }
}
@media screen and (max-width: 1355px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 0;
  }
}
@media screen and (max-width: 1166px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 32px;
  }
}
@media screen and (max-width: 1140px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 0;
  }
}
@media screen and (max-width: 1012px) {
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 32px;
  }
}
@media screen and (max-width: 1000px) {
  #usage .case-study .cards {
    display: block;
  }
  #usage .case-study .card {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
  }
  #usage .case-study .card:not(:first-child) {
    margin-top: 56px;
  }
  #usage .case-study .card:nth-child(2) p {
    padding-bottom: 0;
  }
}
@media screen and (max-width: 600px) {
  #usage .case-study {
    padding-top: 56px;
    padding-bottom: 144px;
  }
  #usage .case-study h3 {
    margin-bottom: 45px;
  }
  #usage .case-study .cards {
    width: 87.2%;
  }
  #usage .case-study .d-pc {
    display: none;
  }
  #usage .case-study .d-sp {
    display: block;
  }
}