html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #1d1d1f;
  background: #ffffff;
  font-family: "SF Pro JP", "SF Pro Text", "SF Pro Icons", "Hiragino Kaku Gothic Pro", Meiryo, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.357px;
  font-feature-settings: normal;
  word-break: normal;
  overflow-wrap: break-word;
}

* {
  box-sizing: border-box;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.8);
  border-bottom: 0;
  backdrop-filter: saturate(180%) blur(20px);
}

.site-header__inner,
.container {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  gap: 16px;
}

.brand {
  display: grid;
  gap: 2px;
}

.brand__title {
  color: #f5f5f7;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}

.brand__sub {
  color: rgba(255, 255, 255, 0.62);
  font-size: 10px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav__link {
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 400;
  line-height: 1;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: #ffffff;
  border-color: #2997ff;
}

.language {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
  border-left: 1px solid rgba(255, 255, 255, 0.24);
  padding-left: 12px;
}

.language__link {
  min-width: 32px;
  padding: 6px 8px;
  color: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 980px;
  text-align: center;
  font-size: 12px;
  font-weight: 400;
}

.language__link[aria-current="true"] {
  color: #ffffff;
  background: #0071e3;
  border-color: #0071e3;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 980px;
  background: transparent;
  color: #f5f5f7;
  font-size: 12px;
  font-weight: 400;
}

.hero {
  border-bottom: 1px solid #dddddd;
}

.hero__image {
  min-height: 560px;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.18)),
    url("https://images.unsplash.com/photo-1562774053-701939374585?auto=format&fit=crop&w=1800&q=80") center / cover;
}

.hero__content {
  display: grid;
  align-content: center;
  min-height: 560px;
  color: #f5f5f7;
  text-align: center;
  justify-items: center;
}

.hero__eyebrow,
.section__eyebrow,
.card__meta,
.tag {
  color: #6e6e73;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0;
}

.hero__eyebrow {
  color: rgba(255, 255, 255, 0.88);
}

.hero__title {
  max-width: 820px;
  margin: 8px 0 12px;
  font-family: "SF Pro JP", "SF Pro Display", "SF Pro Icons", "Hiragino Kaku Gothic Pro", Meiryo, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 64px;
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.53px;
}

.hero__text {
  max-width: 620px;
  margin: 0;
  font-size: 21px;
  line-height: 1.24;
  letter-spacing: 0.231px;
}

.section {
  padding: 80px 0;
  border-bottom: 0;
}

.section--soft {
  background: #f5f5f7;
}

.section__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section__title {
  margin: 6px 0 0;
  color: #1d1d1f;
  font-family: "SF Pro JP", "SF Pro Display", "SF Pro Icons", "Hiragino Kaku Gothic Pro", Meiryo, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 40px;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: 0;
}

.section__text {
  max-width: 760px;
  margin: 0;
  color: #1d1d1f;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: #ffffff;
  border: 0;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: rgba(0, 0, 0, 0.08) 0 8px 28px 0;
}

.card__body {
  padding: 24px;
}

.card__image {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-bottom: 1px solid #dddddd;
}

.card__title {
  margin: 6px 0 8px;
  color: #1d1d1f;
  font-size: 21px;
  line-height: 1.24;
  font-weight: 600;
  letter-spacing: 0.231px;
}

.card__text {
  margin: 0;
  color: #6e6e73;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border: 1px solid transparent;
  border-radius: 980px;
  color: #0066cc;
  background: #f5f5f7;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 8px 22px;
  border: 1px solid #0071e3;
  border-radius: 980px;
  color: #ffffff;
  background: #0071e3;
  font-size: 17px;
  font-weight: 400;
}

.button--secondary {
  color: #0071e3;
  background: transparent;
}

.lead {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
}

.lead__image {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.profile {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

.profile__image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.definition {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
}

.definition__row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid #dddddd;
}

.definition__term {
  color: #6e6e73;
  font-weight: 600;
}

.contact-visual {
  aspect-ratio: 21 / 9;
  width: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.contact-info {
  margin-top: 12px;
}

.overview {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  align-items: start;
}

.overview__image {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.image-strip {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 12px;
  margin-top: 24px;
}

.image-strip__image {
  width: 100%;
  min-height: 180px;
  height: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.content-block {
  background: #ffffff;
  border: 0;
  border-radius: 18px;
  padding: 28px;
  box-shadow: rgba(0, 0, 0, 0.06) 0 6px 24px 0;
}

.content-block + .content-block {
  margin-top: 12px;
}

.content-block__title {
  margin: 0 0 10px;
  color: #1d1d1f;
  font-size: 28px;
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: 0.196px;
}

.content-block__text {
  margin: 0;
  color: #6e6e73;
}

.simple-list {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.simple-list__item {
  padding-top: 10px;
  border-top: 1px solid #dddddd;
}

.simple-list__label {
  display: block;
  color: #0066cc;
  font-weight: 600;
}

.schedule {
  display: grid;
  gap: 0;
  border: 0;
  border-radius: 18px;
  background: #ffffff;
  box-shadow: rgba(0, 0, 0, 0.06) 0 6px 24px 0;
}

.schedule__row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 14px 16px;
}

.schedule__row + .schedule__row {
  border-top: 1px solid #dddddd;
}

.schedule__term {
  color: #0066cc;
  font-weight: 600;
}

.schedule__body {
  color: #6e6e73;
}

.research-layout {
  display: grid;
  gap: 16px;
}

.research-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid #dddddd;
}

.research-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.research-item__label {
  color: #0066cc;
  font-weight: 600;
}

.research-item__title {
  margin: 0 0 8px;
  color: #1d1d1f;
  font-size: 28px;
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: 0.196px;
}

.research-item__text {
  margin: 0;
  color: #6e6e73;
}

.research-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.research-visual__main,
.research-visual__sub {
  width: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.research-visual__main {
  aspect-ratio: 16 / 10;
}

.research-visual__sub {
  aspect-ratio: 16 / 10;
}

.research-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.research-intro__note {
  border-left: 3px solid #0071e3;
  padding: 14px 0 14px 16px;
  color: #6e6e73;
  background: #ffffff;
}

.research-theme {
  display: grid;
  grid-template-columns: 220px 1fr 220px;
  gap: 20px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid #dddddd;
}

.research-theme:first-child {
  border-top: 0;
  padding-top: 0;
}

.research-theme__number {
  color: #0066cc;
  font-size: 10px;
  font-weight: 600;
}

.research-theme__title {
  margin: 4px 0 0;
  color: #1d1d1f;
  font-size: 28px;
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: 0.196px;
}

.research-theme__text {
  margin: 0;
  color: #6e6e73;
}

.research-theme__image {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border: 0;
  border-radius: 18px;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.method-list__item {
  background: #ffffff;
  border: 0;
  border-radius: 18px;
  padding: 24px;
  box-shadow: rgba(0, 0, 0, 0.06) 0 6px 24px 0;
}

.method-list__label {
  display: block;
  margin-bottom: 8px;
  color: #0066cc;
  font-weight: 600;
}

.site-footer {
  padding: 32px 0;
  color: #6e6e73;
  background: #f5f5f7;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid #dddddd;
  padding-top: 20px;
}

@media (max-width: 980px) {
  .grid--3,
  .grid--2,
  .lead,
  .profile,
  .overview,
  .research-item,
  .image-strip,
  .research-visual,
  .research-intro,
  .research-theme,
  .method-list {
    grid-template-columns: 1fr;
  }

  .profile__image {
    max-width: 360px;
  }
}

@media (max-width: 760px) {
  .site-header__inner {
    min-height: 64px;
  }

  .menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 64px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 12px 12px;
    background: #fafafc;
    border: 0;
    border-radius: 18px;
    box-shadow: rgba(0, 0, 0, 0.12) 0 12px 32px 0;
  }

  .nav__link {
    color: rgba(0, 0, 0, 0.8);
  }

  .nav__link:hover,
  .nav__link[aria-current="page"] {
    color: #0066cc;
    border-color: #0066cc;
  }

  .language {
    border-top: 1px solid rgba(0, 0, 0, 0.12);
  }

  .language__link {
    color: rgba(0, 0, 0, 0.8);
    border-color: rgba(0, 0, 0, 0.18);
  }

  .nav.is-open {
    display: flex;
  }

  .language {
    margin: 8px 0 0;
    padding: 8px 0 0;
    border-left: 0;
    border-top: 1px solid #dddddd;
  }

  .hero__title {
    font-size: 40px;
  }

  .hero__image,
  .hero__content {
    min-height: 460px;
  }

  .section {
    padding: 40px 0;
  }

  .section__head,
  .site-footer__inner {
    display: grid;
  }
}