/* ============================================
   top.css
   TOPページ固有スタイル
   ============================================ */

/* ============================================
   1. FV（ファーストビュー）
   ============================================ */

.fv {
  height: 850px;
  overflow: hidden;
  position: relative;
}

.js-fv-intro .header__inner,
.js-fv-intro .fv__content {
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}

.js-fv-intro .header__inner {
  transform: translateY(20px);
  transition-delay: 0s;
}

.js-fv-intro .fv__content {
  transform: translateY(20px);
  transition-delay: 0.12s;
}

.js-fv-intro.is-fv-intro-visible .header__inner {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.js-fv-intro.is-fv-intro-visible .fv__content {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.js-fv-intro body.has-dropdown-open .header__inner {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js-fv-intro .header__inner,
  .js-fv-intro .fv__content {
    transition: none;
    transform: none;
  }
}

/* --- 背景写真 --- */

.fv__bg {
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

.fv__bg picture {
  display: block;
  height: 100%;
  width: 100%;
}

.fv__bg img {
  height: 100%;
  object-fit: cover;
  transition: filter 0.3s ease;
  width: 100%;
}

/* --- 装飾テキスト --- */
.fv__content {
  left: 50px;
  max-width: 624px;
  position: absolute;
  /* top: 344px; */
  bottom: 74px;
  z-index: 2;
  margin-left: max((calc(100vw - var(--container-max-width)) / 2), 0px);
}

.fv__deco-text {
  height: 318px;
  pointer-events: none;
  transition: filter 0.3s ease;
  width: 624px;
}

.fv__deco-text img {
  display: block;
  height: 100%;
  width: 100%;
}

/* --- キャッチコピー・サブコピー --- */

.fv__catchcopy {
  color: var(--color-white-1);
  font-family: var(--font-family-noto-sans-jp);
  font-size: var(--font-size-32);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-100);
  margin-block-start: 8px;
  transition: filter 0.3s ease;
}

.fv__subcopy {
  color: var(--color-white-1);
  font-family: var(--font-family-noto-sans-jp);
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-500);
  line-height: var(--line-height-28);
  margin-block-start: 32px;
  transition: filter 0.3s ease;
}

body.has-dropdown-open .fv__bg img,
body.has-dropdown-open .fv__deco-text,
body.has-dropdown-open .fv__catchcopy,
body.has-dropdown-open .fv__subcopy {
  filter: blur(15px);
}

/* ============================================
   2. About OneBright
   ============================================ */

.about {
  --about-scale-progress: 0;
  --about-start-scale: 1;
  --about-current-scale: calc(
    var(--about-start-scale) -
      ((var(--about-start-scale) - 1) * var(--about-scale-progress))
  );
  background-color: var(--color-navy-3);
  min-height: calc(100svh + 880px);
  overflow-x: clip;
}

.about__container {
  /* .container を継承 */
  flex: 0 0 100%;
  width: 100%;
}

.about__sticky {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 100svh;
  overflow: hidden;
  padding-block: 80px;
  position: sticky;
  top: 0;
  width: 100%;
}

.about__wrap {
  border-radius: var(--radius-5);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.24);
  height: 750px;
  overflow: hidden;
  position: relative;
  transform: scale(var(--about-current-scale));
  transform-origin: center center;
  width: 100%;
  will-change: transform;
}

.about__bg-video {
  height: 100%;
  left: 0;
  object-fit: cover;
  position: absolute;
  top: 0;
  width: 100%;
}

.about__overlay {
  background-color: #08102a;
  height: 100%;
  left: 0;
  mix-blend-mode: multiply;
  opacity: calc(0.46 + (0.19 * var(--about-scale-progress)));
  position: absolute;
  top: 0;
  width: 100%;
}

.about__content {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-block: 70px 80px;
  padding-inline: 100px;
  position: relative;
  transform: scale(calc(1 / var(--about-current-scale)));
  transform-origin: center center;
}

.about__heading {
  color: var(--color-white-1);
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-80);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-100);
  margin-block-start: 24px;
}

.about__text {
  color: var(--color-white-1);
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-500);
  line-height: var(--line-height-30);
  margin-block-start: 32px;
}

.about__btn-wrap {
  align-self: flex-end;
  margin-block-start: auto;
}

/* ============================================
   3. Our Business
   ============================================ */

.business {
  background-color: var(--color-white-1);
  overflow: hidden;
  padding-block: 72px 90px;
  position: relative;
}

/* --- レイアウト --- */

.business__inner {
  align-items: flex-start;
  display: flex;
  gap: 68px;
}

.business__left {
  flex: 0 0 670px;
}

.business__heading {
  color: var(--color-navy-2);
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-80);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-160);
  margin-block-start: 12px;
}

.business__heading-break {
  display: inline;
}

.business__items {
  border-block: 1px solid var(--color-navy-2);
  display: flex;
  flex-direction: column;
  height: 580px;
  margin-block-start: 36px;
  min-width: 0;
  width: 100%;
}

.business__item {
  align-items: flex-start;
  display: flex;
  flex: 1;
  gap: 24px;
  justify-content: space-between;
  padding-block: 78px;
  align-items: center;
}

.business__item + .business__item {
  border-top: 1px solid var(--color-navy-2);
}

.business__item-photo {
  display: none;
}

.business__item-photo img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
  aspect-ratio: 372 / 220;
}

.business__item-title {
  color: var(--color-navy-2);
  font-size: var(--font-size-24);
  font-family: var(--font-family-noto-sans-jp);
  font-weight: var(--font-weight-700);
  letter-spacing: 2.4px;
  line-height: var(--line-height-100);
}

.business__item-text {
  color: var(--color-black-2);
  font-size: var(--font-size-16);
  font-family: var(--font-family-noto-sans-jp);
  font-weight: var(--font-weight-500);
  line-height: 30px;
  margin-block-start: 15px;
  max-width: 560px;
}

.business__item-body {
  flex: 1;
  padding-inline-end: 20px;
}

.business__item-action {
  isolation: isolate;
  flex: 0 0 auto;
  margin-block-start: 6px;
  position: relative;
  transition: color 0.18s ease 0.12s;
}

.business__item-action::before {
  background-color: var(--color-white-1);
  border-radius: inherit;
  content: "";
  inset: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease;
  z-index: 0;
}

.business__item-action .btn__arrow {
  position: relative;
  z-index: 1;
}

.business__item-action.icon-btn--navy {
  border: 1px solid var(--color-navy-2);
}

.business__item-action.icon-btn--black {
  border: 1px solid var(--color-black-1);
}

.business__item:hover .business__item-action.icon-btn--navy,
.business__item:focus-within .business__item-action.icon-btn--navy {
  color: var(--color-navy-2);
}

.business__item:hover .business__item-action.icon-btn--black,
.business__item:focus-within .business__item-action.icon-btn--black {
  color: var(--color-black-1);
}

.business__item:hover .business__item-action::before,
.business__item:focus-within .business__item-action::before {
  transform: scaleX(1);
}

.business__item-action:hover {
  filter: none;
}

/* --- 右側写真 --- */

.business__right {
  align-items: center;
  display: flex;
  flex: 1;
  justify-content: flex-end;
  padding-block-start: 208px;
}

.business__photo {
  border-radius: var(--radius-5);
  height: 580px;
  max-width: 536px;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 536 / 580;
}

.business__photo img {
  height: 100%;
  object-fit: cover;
  opacity: 1;
  transition: opacity 0.24s ease;
  width: 100%;
  border-radius: 10px;
}

.business__photo img.is-preview-switching {
  opacity: 0.35;
}

/* ============================================
   4. Business Banner
   ============================================ */

.business-banner {
  background-color: var(--color-white-1);
  margin-block-start: -42px;
  overflow: hidden;
}

.business-banner__inner {
  inline-size: 100vw;
  margin-inline: calc(50% - 50vw);
  overflow: hidden;
}

.business-banner__row {
  color: #01496b;
  font-family: "Outfit", var(--font-family-figtree), sans-serif;
  font-size: 160px;
  font-style: normal;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: normal;
  overflow: hidden;
  white-space: nowrap;
}

.business-banner__track {
  align-items: center;
  display: flex;
  inline-size: max-content;
  min-inline-size: 100%;
  will-change: transform;
  animation: business-banner-marquee 24s linear infinite;
}

.business-banner__track--reverse {
  animation-direction: reverse;
}

.business-banner__group {
  align-items: center;
  display: flex;
  flex: 0 0 auto;
  gap: max(18px, 1vw);
  padding-inline-end: max(72px, 4vw);
}

.business-banner__row--top .business-banner__group {
  gap: max(34px, 1.8vw);
}

.business-banner__row--bottom {
  margin-block-start: min(-34px, -1.8vw);
}

.business-banner:hover .business-banner__track,
.business-banner__track:has(.business-banner__group:hover) {
  animation-play-state: paused;
}

.business-banner__text {
  display: block;
  flex: 0 0 auto;
  font-weight: 400;
}

.business-banner__text--caps {
  font-weight: 700;
}

.business-banner__accent {
  font-weight: 900;
}

.business-banner__logo {
  display: inline-flex;
  flex: 0 0 auto;
  height: 0.8625em;
  margin-inline: 2px 10px;
  width: 1.4875em;
}

.business-banner__logo img {
  height: 100%;
  object-fit: contain;
  width: 100%;
}

.business-banner__photo {
  aspect-ratio: 227 / 120;
  border-radius: var(--radius-5);
  display: inline-flex;
  flex: 0 0 auto;
  height: 0.75em;
  margin-inline: -2px 2px;
  overflow: hidden;
  width: 1.41875em;
}

.business-banner__photo img {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

@keyframes business-banner-marquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

/* ============================================
   5. Our Strengths
   ============================================ */

.strengths {
  --strengths-first-card-top: 296px;
  --strengths-diagonal-gap: 197px;
  background-color: var(--color-white-1);
  overflow: hidden;
  padding-block: 80px 76px;
  position: relative;
  z-index: 0;
}

.strengths::after {
  background: var(
    --gradation_02,
    linear-gradient(93deg, #e9e9e9 4.03%, #fff 49.32%, #e4e4e4 98.77%)
  );
  content: "";
  inset: calc(var(--strengths-first-card-top) + var(--strengths-diagonal-gap)) 0
    0;
  position: absolute;
  clip-path: polygon(0 0, 100% 48%, 100% 100%, 0 100%);
  z-index: -1;
}

/* --- 背景画像 --- */

.strengths__bg {
  display: block;
  height: 100%;
  left: 0;
  pointer-events: none;
  position: absolute;
  top: 0;
  width: 100%;
}

.strengths__bg img {
  height: 100%;
  object-fit: cover;
  opacity: 0;
  width: 100%;
}

.strengths__inner {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  position: relative;
}

.strengths__heading {
  color: var(--color-navy-2);
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-80);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-160);
  margin-block: 8px 0;
  text-align: left;
}

.strengths__heading-break {
  display: inline;
}

/* --- カード --- */

.strengths__cards {
  align-items: flex-start;
  display: flex;
  gap: 34px;
  margin-block-start: 48px;
  width: 100%;
}

.strengths__card {
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  flex: 0 0 calc((100% - 68px) / 3);
  overflow: hidden;
  position: relative;
  aspect-ratio: 420 / 480;
}

.strengths__card:nth-child(2) {
  margin-block-start: 50px;
}

.strengths__card:nth-child(3) {
  margin-block-start: 100px;
}

.strengths__card-img {
  height: 100%;
  position: relative;
}

.strengths__card-img img {
  display: block;
  height: 100%;
  object-fit: cover;
  transform: scale(1.03);
  vertical-align: bottom;
  width: 100%;
}

.strengths__card-overlay {
  display: none;
}

.strengths__card-body {
  color: var(--color-white-1);
  display: flex;
  flex-direction: column;
  inset: 0;
  padding: 24px 30px 40px;
  position: absolute;
  width: 100%;
}

.strengths__card-num {
  display: block;
  font-family: var(--font-family-figtree);
  font-size: 72px;
  font-weight: var(--font-weight-700);
  line-height: 1;
  margin-block-end: auto;
}

.strengths__card-title {
  font-size: var(--font-size-24);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-33);
  margin-block-start: 0;
}

.strengths__card-sub {
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-100);
  margin-block-start: 13px;
}

/* ============================================
   6. Case Studies
   ============================================ */

.case-studies {
  background: var(
    --gradation_02,
    linear-gradient(93deg, #e9e9e9 4.03%, #fff 49.32%, #e4e4e4 98.77%)
  );
  padding-block: 0px 80px;
  position: relative;
}


/* --- セクションヘッダー --- */

.case-studies__header {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  margin-block-end: 40px;
}

.case-studies__header-left {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.case-studies__header-right {
  align-self: flex-end;
  margin-block-end: 36px;
}

.case-studies__heading {
  color: var(--color-navy-2);
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-80);
  font-weight: var(--font-weight-700);
  line-height: 160%;
  margin-block-start: 0;
}

/* --- スライダー --- */

.case-studies__slider {
  padding-block-end: 83px;
  overflow: hidden;
  position: relative;
}

.case-studies__track {
  display: flex;
  gap: 30px;
  padding-inline: 10px;
  transition: transform 0.4s ease;
}

/* --- カード --- */

.case-studies__card {
  background-color: var(--color-white-1);
  border-radius: var(--radius-10);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  min-height: 378px;
  padding: 36px 30px 40px;
  width: 804px;
}

.case-studies__card-top {
  align-items: flex-end;
  display: flex;
  gap: 24px;
  justify-content: space-between;
}

.case-studies__card-heading {
  min-width: 0;
}

.case-studies__card-tag {
  align-items: center;
  background-color: var(--color-gold-2);
  border-radius: var(--radius-5);
  color: var(--color-white-1);
  display: inline-flex;
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-700);
  flex-shrink: 0;
  gap: 10px;
  height: 55px;
  padding-block: 19px 17px;
  padding-inline: 19px;
  max-width: 180px;
}

.case-studies__card-tag--corporate {
  background-color: #003d55;
}

.cases-card__list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.cases-card__list li {
    border-top: 1px solid #DBDBDB;
    align-items: flex-start;
    color: var(--color-black-2);
    column-gap: 8px;
    display: flex;
    font-family: var(--font-family-noto-sans-jp);
    font-weight: var(--font-weight-500);
    font-size: var(--font-size-16);
    line-height: var(--line-height-25);
    letter-spacing: 1.6px;
    padding: 4px 0;
}

.cases-card__list li:first-child {
    border-top: 0;
}

.cases-card__list li::before {
    align-self: center;
    background: url("../../images/cases/icon-check-circle.svg") center / 16px 16px no-repeat;
    content: "";
    display: block;
    flex: 0 0 16px;
    height: 16px;
    margin-top: 0;
    width: 16px;
}

.case-studies__tag-icon {
  flex-shrink: 0;
  height: 20px;
  width: 20px;
}

.case-studies__case-num {
  color: var(--color-navy-2);
  font-family: var(--font-family-figtree);
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-160);
  margin-block-start: 0;
}

.case-studies__card-title {
  color: var(--color-navy-2);
  font-size: var(--font-size-24);
  font-weight: var(--font-weight-700);
  line-height: var(--line-height-100);
  margin-block-start: 13px;
}

/* --- ステップ --- */

.case-studies__steps {
  align-items: flex-start;
  display: flex;
  gap: 28px;
  justify-content: space-between;
  margin-block-start: 35px;
  position: relative;
}

.case-studies__step {
  flex: 1 1 0;
  min-width: 0;
}

.case-studies__step-box {
  border-radius: var(--radius-10);
  height: 100px;
  width: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-studies__step-box img {
  height: 44px;
  width: 44px;
}

.case-studies__step--problem .case-studies__step-box {
  background-color: var(--color-gray-1);
}

.case-studies__step--response .case-studies__step-box {
  background-color: var(--color-navy-2);
}

.case-studies__step--result .case-studies__step-box {
  background-color: var(--color-gold-2);
}

.case-studies__step-info {
  margin-block-start: 20px;
}

.case-studies__step-label {
  align-items: center;
  display: flex;
  gap: 8px;
}

.case-studies__step-bar {
  display: block;
  flex-shrink: 0;
  height: 25px;
  width: 4px;
}

.case-studies__step--problem .case-studies__step-bar {
  background-color: var(--color-gray-1);
}

.case-studies__step--response .case-studies__step-bar {
  background-color: var(--color-navy-2);
}

.case-studies__step--result .case-studies__step-bar {
  background-color: var(--color-gold-2);
}

.case-studies__step-name {
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-700);
  letter-spacing: var(--letter-spacing-10);
}

.case-studies__step--problem .case-studies__step-name {
  color: var(--color-gray-1);
}
.case-studies__step--response .case-studies__step-name {
  color: var(--color-navy-2);
}
.case-studies__step--result .case-studies__step-name {
  color: var(--color-gold-2);
}

.case-studies__step-text {
  color: var(--color-black-2);
  font-size: var(--font-size-16);
  font-weight: var(--font-weight-500);
  letter-spacing: var(--letter-spacing-10);
  line-height: var(--line-height-25);
  margin-block-start: 14px;
}

/* --- ステップ間の矢印 --- */

.case-studies__step-arrow {
  display: flex;
  height: 44px;
  justify-content: center;
  left: calc(33.333% - 72px);
  margin-inline-start: 0;
  margin-block-start: 0;
  position: absolute;
  top: 26px;
  width: 44px;
  z-index: 1;
}

.case-studies__step-arrow::before {
  background-color: var(--color-gray-1);
  border-radius: 50%;
  content: "";
  height: 44px;
  left: 0;
  position: absolute;
  top: 0;
  width: 44px;
}

.case-studies__step-arrow::after {
  border-color: var(--color-white-1);
  border-style: solid;
  border-width: 0 2px 2px 0;
  content: "";
  display: block;
  height: 12px;
  left: 14px;
  position: absolute;
  top: 15px;
  transform: rotate(-45deg);
  width: 12px;
}

.case-studies__step-arrow--first::before {
  background-color: var(--color-gray-1);
}

.case-studies__step-arrow--second::before {
  background-color: var(--color-navy-2);
}

.case-studies__step-arrow--second {
  left: calc(66.666% - 72px);
}

/* --- ナビゲーションボタン --- */

.case-studies__prev,
.case-studies__next {
  cursor: pointer;
  height: 55px;
  position: absolute;
  top: auto;
  bottom: 0;
  transform: none;
  width: 55px;
  z-index: 1;
}

.case-studies__prev {
  left: 0;
}

.case-studies__next {
  right: 0;
}

.case-studies__nav-btn {
  isolation: isolate;
  background-color: var(--color-white-1);
  border: 1px solid var(--color-navy-2);
  color: var(--color-navy-2);
  padding: 0;
  border-radius: 5px;
  transition: color 0.18s ease 0.12s;
}

.case-studies__nav-btn::before {
  background-color: var(--color-navy-2);
  border-radius: inherit;
  content: "";
  inset: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease;
  z-index: 0;
}

.case-studies__nav-btn .btn__arrow {
  position: relative;
  z-index: 1;
}

.case-studies__nav-btn .btn__arrow::before {
  background-color: currentColor;
}

.case-studies__nav-btn:not(:disabled):hover,
.case-studies__nav-btn:not(:disabled):focus-visible {
  color: var(--color-white-1);
}

.case-studies__nav-btn:not(:disabled):hover::before,
.case-studies__nav-btn:not(:disabled):focus-visible::before {
  transform: scaleX(1);
}

.case-studies__nav-icon--left {
  transform: scaleX(-1);
}

.case-studies__prev:disabled,
.case-studies__next:disabled {
  opacity: 0.3;
}


/* ============================================
   9. レスポンシブ（Tablet）
   ============================================ */

@media screen and (min-width: 769px) and (max-width: 1200px) {
  /* --- FV --- */

  .fv {
    height: 780px;
  }

  .fv__content {
    left: 24px;
    top: 374px;
    width: 513px;
  }

  .fv__deco-text {
    height: 261px;
    width: 513px;
  }

  .fv__catchcopy {
    margin-block-start: 8px;
  }

  .fv__subcopy {
    margin-block-start: 32px;
  }

  /* --- About --- */

  .about {
    padding-block: 64px;
  }

  .about__wrap {
    height: 680px;
  }

  .about__content {
    padding-block: 64px 52px;
    padding-inline: 56px;
  }

  .about__heading {
    font-size: 72px;
  }

  /* --- Business --- */

  .business {
    padding-block: 64px 72px;
  }

  .business__inner {
    display: block;
  }

  .business__left {
    flex: none;
    width: 100%;
  }

  .business__heading {
    font-size: 72px;
  }

  .business__items {
    height: auto;
    margin-block-start: 32px;
  }

  .business__item {
    align-items: center;
    gap: 24px;
    padding-block: 32px;
  }

  .business__item-photo {
    aspect-ratio: 127 / 67;
    border-radius: var(--radius-5);
    display: block;
    flex: 0 0 clamp(220px, 30vw, 300px);
    height: auto;
    overflow: hidden;
  }

  .business__item-photo img.business__item-photo-img {
    display: none;
  }

  .business__item-text {
    max-width: none;
  }

  .business__item-body {
    padding-inline-end: 0;
  }

  .business__right {
    display: none;
  }

  .business-banner {
    margin-block-start: 0;
    padding-block-end: 40px;
  }

  .business-banner__row {
    font-size: clamp(96px, 12vw, 144px);
  }

  .business-banner__group {
    gap: clamp(12px, 1.6vw, 20px);
    padding-inline-end: clamp(40px, 4vw, 56px);
  }

  .business-banner__row--top .business-banner__group {
    gap: clamp(16px, 2.5vw, 28px);
  }

  .business-banner__row--bottom {
    margin-block-start: -20px;
  }

  .business-banner__logo {
    height: clamp(92px, 10.5vw, 124px);
    width: clamp(158px, 18vw, 214px);
  }

  .business-banner__photo {
    height: clamp(84px, 9vw, 108px);
    width: clamp(160px, 17vw, 204px);
  }

  /* --- Strengths --- */

  .strengths {
    --strengths-first-card-top: 250px;
    --strengths-diagonal-gap: 160px;
    padding-block: 64px 80px;
  }

  .strengths__heading {
    font-size: 72px;
    line-height: 1.1;
  }

  .strengths__cards {
    gap: 20px;
  }

  .strengths__card {
    flex-basis: calc((100% - 40px) / 3);
  }

  .strengths__card-body {
    padding: 24px 24px 28px;
  }

  .strengths__card-num {
    font-size: 52px;
  }

  .strengths__card-title {
    font-size: 20px;
  }

  /* --- Case Studies --- */

  .case-studies {
    padding-block: 64px 80px;
  }

  .case-studies__heading {
    font-size: 72px;
  }

  .case-studies__card {
    padding: 36px 30px 40px;
    width: min(804px, 100%);
  }

  .case-studies__card-top {
    align-items: flex-start;
  }

  .case-studies__steps {
    gap: 16px;
  }

  .case-studies__step-box {
    height: 82px;
    width: 82px;
  }

  .case-studies__step-box img {
    height: 36px;
    width: 36px;
  }

  .case-studies__step-name,
  .case-studies__step-text {
    font-size: 14px;
  }

  .case-studies__step-arrow {
    left: calc(33.333% - 52px);
    top: 19px;
  }

  .case-studies__step-arrow--second {
    left: calc(66.666% - 52px);
  }

}

/* ============================================
   10. レスポンシブ（SP）
   ============================================ */

@media screen and (max-width: 768px) {
  /* --- FV --- */

  .fv {
    background: #071117;
    height: 801px;
  }

  .fv__bg {
    background: none;
    overflow: hidden;
  }

  .fv__bg::after {
    background: linear-gradient(
      180deg,
      rgba(7, 17, 23, 0) 52%,
      rgba(7, 17, 23, 0.7) 82%,
      #071117 100%
    );
    content: "";
    inset: 0;
    position: absolute;
  }

  .fv__bg img {
    object-position: 64.5% center;
  }

  .fv__content {
    left: calc(50% - 185.5px);
    top: 481px;
    width: 371px;
  }

  .fv__deco-text {
    height: 189px;
    width: 371px;
  }

  .fv__catchcopy {
    font-size: var(--font-size-16);
    margin-block-start: 9px;
  }

  .fv__subcopy {
    font-size: var(--font-size-14);
    line-height: 25px;
    margin-block-start: 10px;
  }

  /* --- About --- */

  .about {
    min-height: calc(100svh + 240px);
    padding-block: 0;
  }

  .about__sticky {
    height: 720px;
    min-height: 720px;
    padding-block: 60px;
  }

  .about__wrap {
    height: 600px;
    min-height: 0;
  }

  .about__bg-video {
    height: 600px;
  }

  .about__overlay {
    height: 600px;
  }

  .about__content {
    padding-block: 46px 50px;
    padding-inline: 10px;
    position: relative;
  }

  .about__heading {
    font-size: 64px;
    margin-block-start: 16px;
  }

  .about .section-label {
    gap: 5px;
  }

  .about .section-label__icon {
    height: 18.489px;
    width: 32px;
  }

  .about .section-label__text {
    font-size: 16px;
  }

  .about__text {
    font-size: var(--font-size-14);
    margin-block-start: 24px;
    line-height: 25px;
  }

  .about__btn-wrap {
    align-self: flex-end;
    margin-block-start: 0;
    position: absolute;
    right: 24px;
    top: 500px;
  }

  .about__btn-wrap .btn {
    height: 50px;
    width: 190px;
  }

  .about__btn-wrap .btn__label {
    padding-inline-start: 16px;
  }

  .about__btn-wrap .btn__icon {
    width: 50px;
  }

  .about__btn-wrap .btn__icon::before {
    height: 40px;
  }

  /* --- Business --- */

  .business {
    padding-block: 56px 0;
  }

  .business__inner {
    flex-direction: column;
    gap: 24px;
  }

  .business__left {
    flex: none;
    width: 100%;
  }

  .business__heading {
    font-size: 64px;
    margin-block-start: 18px;
    line-height: 1;
  }

  .business__heading-break {
    display: block;
    height: 0;
  }

  .business__left .section-label {
    gap: 5px;
  }

  .business__left .section-label__icon {
    height: 18.49px;
    width: 32px;
  }

  .business__left .section-label__text {
    font-size: 16px;
  }

  .business__items {
    height: auto;
    margin-block-start: 40px;
  }

  .business__item {
    display: block;
    flex: none;
    padding-block: 30px;
    position: relative;
  }

  .business__item-photo {
    display: block;
    min-height: 220px;
    margin-inline: 0;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 372 / 220;
    border-radius: 10px;
  }

  .business__item-title {
    font-size: 16px;
    letter-spacing: var(--letter-spacing-10);
    margin-top: 24px;
    line-height: 28px;
  }

  .business__item-text {
    font-size: var(--font-size-14);
    line-height: 25px;
    margin-block-start: 7px;
    max-width: none;
    padding-right: 0;
  }

  .business__item-body {
    padding-inline-end: 0;
  }

  .business__right {
    display: none;
  }

  .business-banner {
    margin-block-start: 50px;
    padding-block-end: 44px;
  }

  .business-banner__inner {
    padding-inline: 0;
  }

  .business-banner__row {
    font-size: 80px;
  }

  .business-banner__track {
    animation-duration: 18s;
  }

  .business-banner__group {
    gap: 0;
    padding-inline-end: 20px;
  }

  .business-banner__row--bottom {
    margin-block-start: -2px;
  }

  .business-banner__logo {
    height: 69px;
    width: 119px;
  }

  .business-banner__photo {
    height: 60px;
    margin-inline-start: 5px;
    width: 90px;
  }

  .business__item-action {
    display: flex;
    margin-block-start: 13px;
    margin-inline-start: auto;
    position: relative;
    width: 40px;
    height: 40px;
  }

  /* --- Strengths --- */

  .strengths {
    --strengths-first-card-top: 188px;
    --strengths-diagonal-gap: 376px;
    padding-block: 0 48px;
  }

  .strengths .section-label {
    gap: 5px;
  }

  .strengths .section-label__icon {
    height: 18.49px;
    width: 32px;
  }

  .strengths .section-label__text {
    font-size: 16px;
  }

  .strengths::after {
    background: linear-gradient(90deg, #e9e9e9 0%, #f7f7f7 100%);
    inset: calc(
        var(--strengths-first-card-top) + var(--strengths-diagonal-gap) - 20px
      )
      0 0;
    clip-path: polygon(0 0, 100% 12%, 100% 100%, 0 100%);
  }

  .strengths__heading {
    font-size: 64px;
    line-height: 1.05;
    margin-block-start: 20px;
  }

  .strengths__heading-break {
    display: block;
    height: 0;
  }

  .strengths__cards {
    width: 100%;
    flex-direction: column;
    gap: 20px;
    margin-block-start: 43px;
    margin-inline: 0;
  }

  .strengths__card {
    background: var(--color-white-1);
    border-radius: 5px;
    flex-basis: auto;
    height: 220px;
    overflow: hidden;
    width: 340px;
  }

  .strengths__card:nth-child(1),
  .strengths__card:nth-child(3) {
    margin-inline: 0 auto;
  }

  .strengths__card:nth-child(2) {
    margin-block-start: 0;
    margin-inline: auto 0;
  }

  .strengths__card:nth-child(3) {
    margin-block-start: 0;
  }

  .strengths__card:nth-child(1) .strengths__card-img img {
    object-position: center 62%;
  }

  .strengths__card-img {
    height: 220px;
  }

  .strengths__card-body {
    padding: 0;
    position: absolute;
    inset: 0;
  }

  .strengths__card-num {
    color: var(--color-white-1);
    font-family: var(--font-family-figtree);
    font-size: 36px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin: 0;
    position: inherit;
  }

  .strengths__card-title {
    font-size: 14px;
    left: 15px;
    line-height: 1.6;
    margin: 0;
    position: absolute;
    top: 166px;
  }

  .strengths__card-sub {
    font-size: 12px;
    line-height: 1.6;
    left: 15px;
    margin: 0;
    position: absolute;
    top: 188px;
  }

  .strengths__card-img {
    height: 100%;
  }

  .strengths__card-body {
    padding: 8px 10px 15px;
  }

  .strengths__card-num {
    font-size: 36px;
  }

  .strengths__card-title {
    font-size: 14px;
    margin-block-start: 0;
  }

  /* --- Case Studies --- */

  .case-studies {
    background: linear-gradient(90deg, #e9e9e9 0%, #f7f7f7 100%);
    padding-block: 7px 60px;
  }

  .case-studies .section-label {
    gap: 5px;
  }

  .case-studies .section-label__icon {
    height: 18.49px;
    width: 32px;
  }

  .case-studies .section-label__text {
    font-size: 16px;
  }

  .case-studies__header {
    align-items: flex-start;
    flex-direction: column;
    gap: 21px;
  }

  .case-studies__header-left {
    gap: 18px;
  }

  .case-studies__header-right {
    align-self: flex-start;
    margin-block-end: 0;
  }

  .case-studies__header-right .btn {
    height: 50px;
    width: 190px;
  }

  .case-studies__header-right .btn__label {
    padding-inline-start: 16px;
  }

  .case-studies__header-right .btn__icon {
    width: 50px;
  }

  .case-studies__header-right .btn__icon::before {
    height: 40px;
  }

  .case-studies__heading {
    font-size: 64px;
    line-height: 1;
    text-align: left;
  }

  .case-studies__card {
    height: auto;
    padding: 28px 10px 30px 20px;
    max-width: 375px;
    width: 100%;
  }

  .case-studies__card-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .cases-card__list li {
    font-size: 14px;
  }

  .cases-card__list li::before {
    align-self: inherit;
    margin-top: 5px;
  }

  br.cases-br-pc-tablet {
    display: none;
  }  

  .case-studies__card-tag {
    /* background: var(--color-gold-2); */
    box-sizing: border-box;
    border-radius: 2.313px;
    font-size: 13px;
    gap: 6px;
    height: 30px;
    padding-inline: 12px;
    width: 140px;
  }

  .case-studies__tag {
    box-sizing: border-box;
    font-size: 13px;
    gap: 6px;
    height: 30px;
    padding-inline: 12px;
    width: 140px;
  }

  .case-studies__tag-icon {
    height: 16px;
    width: 16px;
  }

  .case-studies__slider {
    padding-block-end: 60px;
  }

  .case-studies__track {
    padding-inline: max(10px, calc((100% - 375px) / 2));
    gap: 10px;
  }

  .case-studies__steps {
    flex-direction: column;
    gap: 16px;
    position: static;
  }

  .case-studies__step {
    display: flex;
    gap: 31px;
  }

  .case-studies__step-box {
    border-radius: var(--radius-5);
  }

  .case-studies__step-info {
    margin-top: 12px;
  }

  .case-studies__step-bar {
    width: 2px;
  }

  .case-studies__step-name {
    line-height: 1;
  }

  .case-studies__step-text {
    font-size: 14px;
    line-height: 23px;
    letter-spacing: 0.08em;
  }

  .case-studies__step-box {
    flex: 0 0 93px;
    height: 93px;
    min-width: 93px;
    width: 93px;
  }

  .case-studies__step-box img {
    height: 40px;
    width: 40px;
  }

  .case-studies__step-arrow {
    display: none;
  }

  .case-studies__prev,
  .case-studies__next {
    height: 40px;
    width: 40px;
  }

  .case-studies__nav-btn {
    border: 1px solid var(--color-navy-2);
  }

  .case-studies__nav-btn:hover,
  .case-studies__nav-btn:active,
  .case-studies__nav-btn:focus-visible {
    transform: none;
  }

}

@media screen and (min-width: 431px) and (max-width: 768px) {
  .business-banner__inner {
    inline-size: 100vw;
    margin-inline: calc(50% - 50vw);
  }

  .business-banner__row {
    font-size: clamp(80px, 14.6vw, 112px);
  }

  .business-banner__group {
    gap: clamp(10px, 2vw, 18px);
    padding-inline-end: clamp(24px, 4vw, 40px);
  }

  .business-banner__row--bottom {
    margin-block-start: clamp(-20px, -2.8vw, -8px);
  }

  .business-banner__logo {
    height: clamp(69px, 13vw, 100px);
    width: clamp(119px, 22.4vw, 172px);
  }

  .business-banner__photo {
    height: clamp(60px, 11vw, 84px);
    width: clamp(90px, 19vw, 146px);
  }
}

@media screen and (max-width: 500px) {
  .fv__bg img {
    object-position: center top;
  }
}