/* ===================================
    MV
=================================== */
.mv {
    position: relative;
    z-index: 5;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem 8rem 2rem 7rem;
  aspect-ratio: 28 / 17;
  background: url(../images/about/imgMv.webp) no-repeat center / cover;
  width: 100%;
}

.mv__inner {
  width: 100%;
  display: grid;
  grid-template-columns: 36rem 44%;
  justify-content: space-between;
  max-width: 980px;
  align-items: end;

}

.mv__text {
  color: #FAF8F8;
  font-size: 1.4rem;
  font-weight: 500;
  line-height: 2.6;
  letter-spacing: 0.028rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.1s ease, transform 1.1s ease;
}

.mv__text.is-fadeUp {
  opacity: 1;
  transform: translateY(0);
}

.mv .common__btn {
  gap: 2rem;
  padding: 1.8rem 3rem;
  border-radius: 6rem;
  border: 1px solid #FAF8F8;
}

.mv .common__btn-text {
  color: #FAF8F8;
  transition: 0.3s ease;
  font-weight: 500;
  line-height: 1.6;
}

.mv .common__btn-icon {
  background: #FAF8F8;
  width: 5rem;
  height: 4.2rem;
  border: none;
}

/* ホバー時のアニメーション */
.mv .common__btn:hover {
  background: var(--color-main);
}

.mv .common__btn:hover .common__btn-text {
  color: #FAF8F8;
}

.mv .common__btn:hover .common__btn-icon svg path {
  stroke: #444;
}

@media screen and (max-width: 1400px) {
  .mv {
    padding: 4rem 4rem 2rem 4rem;
  }

  .mv__inner {
    grid-template-columns: 34rem 50%;
    gap: 2rem;
  }

  .mv .common__btn {
    gap: 2rem;
    padding: 1.5rem 2rem;
    border-radius: 6rem;
    border: 1px solid #FAF8F8;
  }
}

@media screen and (max-width: 750px) {
  .mv {
    padding: 6rem 3rem;
    aspect-ratio: inherit;
    background: url(../images/about/imgMvSp.webp) no-repeat center / cover;
  }

  .mv__inner {
    display: flex;
    flex-direction: column-reverse;
    gap: 3.2rem;
  }

  .mv .common__btn {
    gap: 1.8rem;
    padding: 1.8rem 2rem 1.8rem 3rem;
  }

  .mv .common__btn-text {
    font-size: 1.4rem;
  }

  .mv .common__btn-icon {
    width: 4.5rem;
    height: 3.7rem;
  }
}

/* ===================================
    ナガセルータックの製品
=================================== */
.about {
  padding: 14rem 0;
}

.about .section__title {
  text-align: center;
}

.about .section__title .ja {
  line-height: 1.3;
}

.about__list {
  margin: 6rem 0;
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.about__item {
  display: grid;
  grid-template-columns: 18rem 1fr;
  align-items: center;
  gap: 7%;
  padding-right: 4.8%;
  border-radius: 1.6rem;
  padding: 4rem;
}

#bridge.about__item,
#river.about__item {
  border: 2px solid #A7B8CC;
  background: linear-gradient(180deg, #F2F2F2 0%, #DCE9F7 100%), #FFF;
}

#factory.about__item {
  border: 2px solid #E8AE97;
  background: linear-gradient(180deg, #FFF8F5 0%, #F7E2DA 100%), #FFF;
}

#stadium.about__item {
  border: 2px solid #E6D7A7;
  background: linear-gradient(180deg, #F7F6F2 0%, #F7EECD 100%), #FFF;
}

#park.about__item {
  border: 2px solid #CF9BB9;
  background: linear-gradient(180deg, #FBF5FA 0%, #FAE6F1 100%), #FFF;
}

#road.about__item {
  border: 2px solid #B3B3B3;
  background: linear-gradient(180deg, #F2F2F2 0%, #DEDEDE 100%), #FFF;
}

.about__item-img {
  align-self: start;
  padding-top: 2rem;
  filter: drop-shadow(0 0 20px #FFF);
}

.about__item-contents {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2.4rem;
}

.about__item-title {
  font-size: 2.4rem;
  font-weight: 500;
  line-height: 1.48;
  letter-spacing: 0.12rem;
}

.about__item-text {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.6;
}
.about__accordion{
  margin-top: 1.6rem;
  padding: 0 1.6rem 0.8rem 1.6rem;
  border-radius: 0.8rem;
border: 1px solid #444;
}
.about__accordion h4{
  width: 100%;
padding: 1.6rem 0 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.6; /* 24px */
  cursor: pointer;
  position: relative;
}

/* プラス/マイナスアイコン */
.about__accordion h4::after {
  content: "";
  width: 16px;
  height: 16px;
  aspect-ratio: 1/1;
  position: relative;
  flex-shrink: 0;
  background:
    linear-gradient(#444444, #444444) center/1.5px 100%,
    linear-gradient(#444444, #444444) center/100% 1.5px;
  background-repeat: no-repeat;
  transition: transform 0.3s ease;
}

/* 開いた状態（マイナス） */
.about__accordion h4.is-active::after {
  transform: rotate(180deg);
  background:
    linear-gradient(#444444, #444444) center/100% 1.5px;
  background-repeat: no-repeat;
}
.about__accordion p{
font-size: 1.4rem;
font-weight: 500;
line-height: 1.6; /* 20.8px */
}

@media screen and (max-width: 750px) {
  .about {
  padding: 6rem 0 3rem;
}
.about__list{
  margin: 3.2rem 0;
  gap: 3.2rem;
}
.about__item{
  grid-template-columns: repeat(1,1fr);
  padding: 3rem;
  gap: 3rem;
  overflow: hidden;
}
.about__item-img{
  width: 18rem;
  margin: 0 auto;
  padding-top: 0;
}
.about__item-contents{
  gap: 1.6rem;
}
.about__item-title{
  font-size: 2.6rem;
letter-spacing: 0.13rem;
}
}