/* overwrite */
:root {
  --breadcrumb-height: calc(21px + 24px + 20px);
  --header-breadcrumb-height: calc(var(--breadcrumb-height) + 157px);
  --mv-max-height: 970px;
  --mv-min-height: 470px;
}
@media (max-width: 959px) {
  :root {
    --mv-max-height: 850px;
    --mv-min-height: 470px;
    --header-breadcrumb-height: calc(var(--breadcrumb-height) + 108px);
  }
}
@media (max-width: 519px) {
  :root {
    --breadcrumb-height: 82px;
    --header-breadcrumb-height: var(--breadcrumb-height);
    --mv-max-height: auto;
    --mv-min-height: 550px;
  }
}
.wrapper {
  position: relative;
}
.wrapper::before {
  content: "";
  display: block;
  background: #fff;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-breadcrumb-height);
  z-index: 1;
}
.c-breadcrumb {
  position: relative;
  z-index: 1;
}

/* ボタン */
.top-button__link {
  box-sizing: border-box;
  display: inline-block;
  padding: 15px 44px;
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid #949494;
  background: #FFFFFF;
  transition: background 0.2s ease-out;
}
.top-button__link:hover {
  text-decoration: none;
}
.top-button__link__text {
  display: inline-block;
  position: relative;
}
.top-button__link__text::after {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 1em;
  margin: 0 0 0.2em 0.5em;
  vertical-align: middle;
  background: url("https://www.nikon.com/assets/img/icon_angle-right.svg") no-repeat 0 0;
  background-size: 100%;
}
.top-button--l {
  margin-top: 44px;
}
.top-button--l .top-button__link {
  max-width: 950px;
  width: 100%;
  font-size: 1.8rem;
}
.top-button--center {
  text-align: center;
}
@media (max-width: 1099px) {
  .top-button__link {
    box-sizing: border-box;
    display: inline-block;
    width: 100%;
    padding: 12px 24px;
    font-size: 1.6rem;
    line-height: 1.9;
    text-align: center;
  }
  .top-button--l .top-button__link {
    font-size: 1.6rem;
  }
}
@media (any-hover: hover) {
  .top-button__link:hover {
    background: #dbdbdb;
  }
}

@media (max-width: 519px) {
  .top-button--l {
    margin-top: 38px;
  }
}

/* セクション */
.top-block-link-list {
  display: grid;
  gap: 60px;
}
.top-link-block__link {
  text-decoration: none;
}
.top-link-block__link__img {
  position: relative;
  display: block;
  order: 1;
  transition: opacity 0.2s ease-out;
}
.top-link-block__link__img:after {
  transition: border 0.2s ease-out;
}
.top-link-block__link__img img {
  width: 100%;
  height: auto;
  aspect-ratio: 840 / 336;
  object-fit: cover;
}
.top-link-block__link__body {
  display: block;
  margin-top: 30px;
}
.top-link-block__link__body__title {
  display: block;
  font-size: 2.1rem;
  font-weight: 500;
  line-height: 1.5;
}
.top-link-block__link__body__title::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.5) * 0.6em);
  content: "";
}
.top-link-block__link__body__title::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.5) * 0.4em);
  content: "";
}
.top-link-block__link__body__title span::after {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 1em;
  margin: 0 0 0.2em 0.5em;
  vertical-align: middle;
  background: url("https://www.nikon.com/assets/img/icon_angle-right.svg") no-repeat 0 0;
  background-size: 100%;
}
.top-link-block__link__body__text {
  display: block;
  margin-top: 18px;
  color: #6F6F6F;
  font-size: 1.6rem;
  line-height: 1.9;
}
.top-link-block__link__body__text::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-link-block__link__body__text::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}
@media (max-width: 1099px) {
  .top-block-link-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 60px 32px;
    margin-top: 50px;
  }
  .top-link-block__link__img img {
    aspect-ratio: 340 / 191;
  }
}
@media (max-width: 519px) {
  .top-block-link-list {
    grid-template-columns: 1fr;
    gap: 44px;
    margin-top: 50px;
  }
  .top-link-block__link__img img {
    aspect-ratio: 340 / 191;
  }
}
@media (any-hover: hover) {
  .top-link-block__link:hover .top-link-block__link__img::after {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 1px solid #000;
    box-sizing: border-box;
  }
  .top-link-block__link:hover .top-link-block__link__img {
    position: relative;
    opacity: 0.7;
  }
}


/* グラデーション背景 */
.top-bg-gray {
  background: #E1E1E1;
}
.top-bg-white {
  background: #fff;
}

/* メインビジュアル背景アニメーション */
.top-animation-fixed {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100svh;
  max-height: calc(var(--mv-max-height) + var(--header-breadcrumb-height));
  /* min-height: calc(var(--mv-min-height) + var(--header-breadcrumb-height)); */
}
.top-animation {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
}
.top-animation__light {
  position: absolute;
  top: calc(-923px + var(--header-breadcrumb-height));
  left: -728px;
  width: 1750px;
  height: 1750px;
  background: url('https://www.nikon.com/company/technology/img/img_mv_light_pc.png') no-repeat;
  /* background: url('/company/technology/img/img_mv_light_pc.png') no-repeat #f00; */
  background-size: 1750px 1750px;
  border-radius: 50%;
}
@media (max-width: 519px) {
  .top-animation-fixed {
    height: 100svh;
  }
  .top-animation__light {
    top: -213px;
    left: -280px;
    width: 609px;
    height: 609px;
    background: url('https://www.nikon.com/company/technology/img/img_mv_light_sp.png') no-repeat;
    /* background: url('/company/technology/img/img_mv_light_sp.png') no-repeat #f00; */
    background-size: 609px 609px;
  }
}

/* 動画 */
.top-animation__video-wrap {
  position: absolute;
  top: var(--header-breadcrumb-height);
  left: 0;
  width: 100%;
  height: calc(100% -  var(--header-breadcrumb-height));
  /* mix-blend-mode: exclusion; */
}
.top-animation__video-wrap__video {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 100%;
  height: max(100svh, 1532px);
  object-fit: cover;
  object-position: 0% 50%;
  aspect-ratio: 1792 / 1532;
  opacity: 0;
  filter: drop-shadow(0px 0px rgba(0,0,0,0));
  outline: none;
  border: none;
}
@media (max-width: 519px) {
  .top-animation__video-wrap {
    top: 50%;
    transform: translateY(calc(-50% - 124px));
    width: 100%;
    height: auto;
    aspect-ratio: 750 / 2520;
    /* aspect-ratio: 750 / 750; */
  }
  .top-animation__video-wrap__video {
    transform: translateY(-50%);
    height: 100%;
    aspect-ratio: 750 / 2520;
    /* aspect-ratio: 750 / 750; */
  }
}
@media (max-width: 519px) and (max-height: 632px) {
  .top-animation__video-wrap {
    /* top: 0;
    transform: translateY(0); */
  }
}

/* 線のアニメーション */
.top-animation__line-wrap {
  position: relative;
  top: var(--header-breadcrumb-height);
  height: calc(100% -  var(--header-breadcrumb-height));
}
.top-animation__line-wrap-inner {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 10px;
  transform: translateY(-50%);
}
.top-animation__line {
  position: absolute;
  display: flex;
  align-items: center;
  width: 100%;
  height: 100%;
}
.top-animation__line div {
  width: 100%;
  height: 100%;
  background: url('https://www.nikon.com/company/technology/img/img_mv_line.png') repeat-x;
  background-size: 2000px 100%;
}
.top-animation__line--test div {
  background-color: #f00;
  height: 1px;
}
.top-animation__line--1 {
  transform-origin: 60% 50%;
}
.top-animation__line--1 div {
  height: 2.5px;
}
.top-animation__line--2 {
  transform-origin: 40% 50%;
}
.top-animation__line--2 div {
  height: 2.5px;
}
.top-animation__line--3 {
  transform-origin: 0% 50%;
}
.top-animation__line--3 div {
  height: 2.5px;
}
.top-animation__line--4 {
  transform-origin: 70% 50%;
}
.top-animation__line--5 {
  transform-origin: 30% 50%;
}
.top-animation__line--6 {
  transform-origin: 15% 50%;
}
.top-animation__line--7 {
  transform-origin: 90% 50%;
}
@media (max-width: 519px) {
  .top-animation__line-wrap {
    position: absolute;
    top: 50%;
    transform: translateY(calc(-50% - 124px));
    width: 100%;
    height: auto;
    /* background: #f00; */
    aspect-ratio: 750 / 750;
  }
}
@media (max-width: 519px) and (max-height: 632px) {
  .top-animation__line-wrap {
    /* top: 0;
    transform: translateY(0); */
  }
}

/* アニメーション素材以外のコンテンツエリア */
.top-container {
  position: relative;
  z-index: 1;
}

/* メインビジュアル */
.top-mv {
  margin-top: 20px;
  /* background: #ddd; */
  /* background: #E1E1E1; */
}
.top-mv__inner {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  max-width: 1440px;
  height: calc(100svh - var(--header-breadcrumb-height));
  max-height: var(--mv-max-height);
  min-height: var(--mv-min-height);
  margin: 0 auto;
  padding: 0 150px;
}
.top-mv__sub-text {
  position: relative;
  padding-left: 22px;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.5;
}
.top-mv__sub-text::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.5) * 0.6em);
  content: "";
}
.top-mv__sub-text::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.5) * 0.4em);
  content: "";
}
.top-mv__sub-text span::before {
  position: absolute;
  top: 0.2em;
  left: 0;
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #000000;
}
.top-mv__title {
  margin-top: 51px;
  width: 100%;
  max-width: 637px;
}
.top-mv__title img {
  width: 100%;
  height: auto;
}
.top-mv__title::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.5) * 0.6em);
  content: "";
}
.top-mv__title::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.5) * 0.4em);
  content: "";
}
.top-mv__lead {
  margin-top: 38px;
  font-size: 1.4rem;
  line-height: 1.75;
}
.top-mv__lead::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.5) * 0.6em);
  content: "";
}
.top-mv__lead::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.5) * 0.4em);
  content: "";
}
.top-mv__lead__tb-br {
  display: none;
}
.top-mv__control {
  position: absolute;
  bottom: 30px;
  right: 30px;
  display: flex;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  background: #fff;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease-out;
}
.top-mv__control img {
  vertical-align: middle;
}
.top-mv__control__pause {
  display: flex;
}
.top-mv__control__resume {
  display: none;
}
.top-mv__control.is-pause .top-mv__control__pause {
  display: none;
}
.top-mv__control.is-pause .top-mv__control__resume {
  display: flex;
}
@media (max-width: 1099px) {
  .top-mv__inner {
    padding: 0 64px;
  }
}
@media (max-width: 519px) {
  .top-mv {
    margin-top: 0;
  }
  .top-mv__inner {
    justify-content: flex-end;
    padding: 245px 30px 50px;
  }
  .top-mv__sub-text {
    padding-left: 22px;
    font-size: 1.5rem;
    line-height: 1.5;
  }
  .top-mv__title {
    margin-top: 34px;
    max-width: 307px;
  }
  .top-mv__lead {
    margin-top: 46px;
    font-size: 1.6rem;
    line-height: 1.7;
  }
  .top-mv__lead::before {
    margin-bottom: calc(-1px + (1 - 2) * 0.6em);
  }
  .top-mv__lead::after {
    margin-top: calc(-1px + (1 - 2) * 0.4em);
  }
  .top-mv__lead__tb-br {
    display: block;
  }
  .top-mv__control {
    position: absolute;
    bottom: 14px;
    right: 14px;
  }
}
@media (any-hover: hover) {
  .top-mv__control:hover {
    background-color: #dbdbdb;
  }
}

/* CTOメッセージ */
.top-message {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.00) 0%, rgba(255, 255, 255, 0.60) 54%);
}
.top-message__inner {
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr calc(600 / 1140 * 100%);
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 120px 150px;
  gap: 40px;
}
.top-message__head {
}
.top-message__head__sub-text {
  position: relative;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.5;
}
.top-message__head__sub-text::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.5) * 0.6em);
  content: "";
}
.top-message__head__sub-text::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.5) * 0.4em);
  content: "";
}
.top-message__head__sub-text span {
  position: relative;
  display: inline-block;
  padding-left: 22px;
}
.top-message__head__sub-text span::before {
  position: absolute;
  top: 0.5em;
  left: 0;
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #000000;
}
.top-message__head__title {
  margin-top: 44px;
}
.top-message__body {
  margin-top: 55px;
  font-size: 1.8rem;
  line-height: 1.9;
}
.top-message__body br {
  display: none;
}
.top-message__body > p::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-message__body > p::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}
.top-message__body__name {
  margin-top: 24px;
}
.top-message__body__button {
  margin-top: 44px;
}
.top-message__body__button__link {
  padding: 20px 44px;
  background: rgba(255, 255, 255, 0.4);
}
@media (max-width: 1099px) {
  .top-message__inner {
    display: block;
    padding: 0 64px;
  }
  .top-message__head__title {
    margin-top: 44px;
  }
  .top-message__body {
    margin-top: 32px;
  }
  .top-message__body__button__link {
    width: auto;
  }
}
@media (max-width: 519px) {
  .top-message__inner {
    padding: 120px 16px;
  }
  .top-message__head {
    text-align: center;
  }
  .top-message__head__sub-text {
    text-align: center;
  }
  .top-message__head__title {
    margin-top: 24px;
  }
  .top-message__body {
    margin-top: 37px;
    text-align: center;
    font-size: 1.6rem;
    line-height: 1.7;
  }
  .top-message__body br {
    display: block;
  }
  .top-message__body > p::before {
    margin-bottom: calc(-1px + (1 - 1.6) * 0.6em);
  }
  .top-message__body > p::after {
    margin-top: calc(-1px + (1 - 1.6) * 0.4em);
  }
  .top-message__body__name {
    margin-top: 18px;
  }
  .top-message__body__button__link {
    width: 100%;
    padding: 12px 44px;
  }
}

/* ニコンの技術を読む */
.top-tech-library {
  position: relative;
  padding: 120px 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.60) 0%, #FFF 54%);
}
.top-tech-library__slider__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 63px 40px;
  margin-top: 44px;
}
.top-tech-library__slider__pagination {
  display: none;
}
.top-tech-library__slider__button {
  display: none;
}
@media (max-width: 1099px) {
  .top-tech-library__slider__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 519px) {
  .top-tech-library {
    padding: 11px 0 101px;
  }
  .top-tech-library__slider__inner {
    display: flex !important;
    flex-wrap: nowrap;
    gap: 0;
    grid-template-columns: none;
  }
  .top-tech-library__item__info {
    display: flex;
    align-items: center;
    min-height: 0 !important;
  }
  .top-tech-library__item__date {
    margin-top: 0 !important;
  }
  .top-tech-library__slider {
    position: relative;
    padding-bottom: 44px;
  }
  .top-tech-library__slider__pagination {
    display: block;
  }
  .top-tech-library__slider__button {
    top: auto !important;
    bottom: 0 !important;
    display: block;
    background: transparent;
    width: 25px;
    height: 25px;
    padding: 0;
    outline: 0;
    border: 0;
    background: url('https://www.nikon.com/assets/img/icon_angle-right.svg') no-repeat 50%  50%;
    background-size: 8px 16px;
  }
  .top-tech-library__slider__button::after {
    display: none;
  }
  .top-tech-library__slider__button--next {
    right: -8px;
  }
  .top-tech-library__slider__button--prev {
    left: -8px;
    transform: rotate(180deg);
  }
  .top-tech-library__slider__pagination {
    top: auto !important;
    bottom: 10px !important;
    display: flex;
    justify-content: center;
    gap: 10px;
  }
  .top-tech-library__slider__pagination .swiper-pagination-bullet {
    width: 6px;
    height: 6px;
    margin: 0 !important;
    background: #D9D9D9;
    opacity: 1;
  }
  .top-tech-library__slider__pagination .swiper-pagination-bullet-active {
    background: #222;
  }
}

/* 技術の全体像 */
.top-big-picture__inline {
  padding-bottom: 0;
}
.top-big-picture__inner {
  display: grid;
  grid-template-columns: calc(580 / 1280 * 100%) calc(619 / 1280 * 100%);
  justify-content: space-between;
  position: relative;
  padding-top: 120px;
  border-top: 1px solid #b3b3b3;
}
.top-big-picture__head__title {
  margin-top: 0;
}
.top-big-picture__head__lead {
  margin-top: 32px;
}
.top-big-picture__head__lead::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-big-picture__head__lead::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}
.top-big-picture__body > p::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-big-picture__body > p::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}
.top-big-picture__body__button {
  margin-top: 35px;
}

@media (max-width: 1099px) {
  .top-big-picture__inner {
    display: block;
    padding-top: 100px;
    padding-bottom: 0;
  }
  .top-big-picture__head__lead {
    margin-top: 41px;
  }
  .top-big-picture__body {
    font-size: 1.6rem;
  }
  .top-big-picture__body__button {
    margin-top: 28px;
  }
  .top-big-picture .tec-venn-diagram {
    margin-top: 44px;
  }
}


/* 技術の現場 */
.top-section__inner {
  position: relative;
  padding-top: 120px;
  padding-bottom: 120px;
  display: grid;
  grid-template-columns: calc(368 / 1280 * 100%) calc(840 / 1280 * 100%);
  justify-content: space-between;
}
.top-section__head {
  position: relative;
}
.top-section__head__inner {
  --position-x: 0;
  --position-y: 0;
  --width: 100%;
  --position: static;
  position: var(--position);
  top: var(--position-y);
  left: var(--position-x);
  width: var(--width);
}
.top-section__head__title {
  margin-top: 0;
}
.top-section .top-section__head__lead {
  margin-top: 36px;
}
.top-section__head__lead::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-section__head__lead::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}
.top-section__body {
  font-size: 1.8rem;
  line-height: 1.9;
}
.top-section__body > p::before {
  display: block;
  width: 0;
  height: 1px;
  margin-bottom: calc(-1px + (1 - 1.9) * 0.6em);
  content: "";
}
.top-section__body > p::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: calc(-1px + (1 - 1.9) * 0.4em);
  content: "";
}

@media (max-width: 1099px) {
  .top-section__inner {
    display: block;
    padding-top: 100px;
    padding-bottom: 100px;
  }
  .top-section__head__inner {
    position: static;
    top: 0;
    left: 0;
    width: 100%;
  }
  .top-section__head__lead {
    margin-top: 41px;
  }
  .top-section__body {
    font-size: 1.6rem;
  }
}


/* ニコンの実績 */
.top-works {
  padding-bottom: 32px;
}
.top-works .top-works__inner {
  border-top: 1px solid #b3b3b3;
}
.top-works .top-works__heading {
  margin-bottom: 60px;
}
.top-works__link-block__iamge--border {
  position: relative;
}
.top-works__link-block__iamge--border::before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 1px solid #B3B3B3;
  box-sizing: border-box;
}
.top-works .top-works__note {
  margin-top: 100px;
}
@media (max-width: 1099px) {
  .top-works .top-works__heading {
    margin-top: 100px;
    margin-bottom: 44px;
  }
  .top-works .top-works__note {
    margin-top: 84px;
  }
}