html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: #333333;
  background: #ffffff;
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: normal;
  font-feature-settings: normal;
  word-break: break-word;
  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: #ffffff;
  border-bottom: 1px solid #eeeeee;
}
.site-header__inner, .container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 18px; }
.brand { display: grid; gap: 2px; }
.brand__title { color: #333333; font-size: 16px; font-weight: 700; line-height: 1.35; }
.brand__sub { color: #666666; font-size: 12px; }
.nav { display: flex; align-items: center; gap: 18px; }
.nav__link { color: #333333; font-size: 14px; font-weight: 700; padding: 8px 0; border-bottom: 2px solid transparent; }
.nav__link:hover, .nav__link[aria-current="page"] { color: #ff333f; border-color: #ff333f; }
.language { display: flex; align-items: center; gap: 4px; margin-left: 4px; border-left: 1px solid #eeeeee; padding-left: 12px; }
.language__link { min-width: 32px; padding: 6px 8px; color: #666666; border: 1px solid #eeeeee; border-radius: 4px; text-align: center; font-size: 12px; font-weight: 700; }
.language__link[aria-current="true"] { color: #ffffff; background: #ff333f; border-color: #ff333f; }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid #eeeeee; border-radius: 4px; background: #ffffff; color: #333333; font-weight: 700; }

.hero { border-bottom: 1px solid #eeeeee; }
.hero__image { min-height: 420px; background: linear-gradient(90deg, rgba(0,0,0,0.58), rgba(255,51,63,0.2)), 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: 420px; color: #ffffff; }
.hero__eyebrow, .section__eyebrow, .card__meta, .tag { color: #666666; font-size: 12px; font-weight: 700; letter-spacing: 0; }
.hero__eyebrow { color: rgba(255,255,255,0.84); }
.hero__title { max-width: 760px; margin: 8px 0 14px; color: #ffffff; font-size: 38px; line-height: 1.22; letter-spacing: 0; font-weight: 700; }
.hero__text { max-width: 680px; margin: 0; color: rgba(255,255,255,0.9); font-size: 15px; }

.section { padding: 64px 0; border-bottom: 1px solid #eeeeee; }
.section--soft { background: #f7f7f7; }
.section__head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.section__title { margin: 4px 0 0; color: #666666; font-size: 20px; line-height: 1.35; font-weight: 700; }
.section__text { max-width: 760px; margin: 0; color: #333333; }
.grid { display: grid; gap: 16px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card { background: #ffffff; border: 1px solid #eeeeee; border-radius: 0; overflow: hidden; box-shadow: none; }
.card__body { padding: 20px; }
.card__image { aspect-ratio: 16 / 9; width: 100%; object-fit: cover; border-bottom: 1px solid #eeeeee; }
.card__title { margin: 6px 0 8px; color: #666666; font-size: 17px; line-height: 1.4; font-weight: 700; }
.card__text { margin: 0; color: #333333; }
.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 #eeeeee; border-radius: 4px; color: #ff333f; background: #f7f7f7; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 8px 20px; border: 1px solid #ff333f; border-radius: 4px; color: #ffffff; background: #ff333f; font-size: 14px; font-weight: 700; }
.button--secondary { color: #ff333f; background: transparent; border-color: #ff333f; }

.lead { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: center; }
.lead__image, .profile__image, .contact-visual, .overview__image, .image-strip__image, .research-visual__main, .research-visual__sub, .research-theme__image { object-fit: cover; border: 1px solid #eeeeee; border-radius: 0; }
.lead__image { aspect-ratio: 4 / 3; width: 100%; }
.profile { display: grid; grid-template-columns: 280px 1fr; gap: 24px; align-items: start; }
.profile__image { width: 100%; aspect-ratio: 4 / 5; }
.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 #eeeeee; }
.definition__term { color: #666666; font-weight: 700; }
.contact-visual { aspect-ratio: 21 / 9; width: 100%; }
.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%; }
.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%; }
.content-block { background: #ffffff; border: 1px solid #eeeeee; border-radius: 0; padding: 24px; box-shadow: none; }
.content-block + .content-block { margin-top: 12px; }
.content-block__title { margin: 0 0 10px; color: #666666; font-size: 17px; line-height: 1.4; font-weight: 700; }
.content-block__text { margin: 0; color: #333333; }
.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 #eeeeee; }
.simple-list__label { display: block; color: #ff333f; font-weight: 700; }
.schedule { display: grid; gap: 0; border: 1px solid #eeeeee; border-radius: 0; background: #ffffff; box-shadow: none; }
.schedule__row { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 16px 20px; }
.schedule__row + .schedule__row { border-top: 1px solid #eeeeee; }
.schedule__term { color: #ff333f; font-weight: 700; }
.schedule__body { color: #333333; }

.research-layout { display: grid; gap: 16px; }
.research-item { display: grid; grid-template-columns: 180px 1fr; gap: 20px; padding: 20px 0; border-top: 1px solid #eeeeee; }
.research-item:first-child { border-top: 0; padding-top: 0; }
.research-item__label { color: #ff333f; font-weight: 700; }
.research-item__title { margin: 0 0 8px; color: #666666; font-size: 17px; line-height: 1.4; font-weight: 700; }
.research-item__text { margin: 0; color: #333333; }
.research-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.research-visual__main, .research-visual__sub { width: 100%; aspect-ratio: 16 / 10; }
.research-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.research-intro__note { border-left: 4px solid #ff333f; padding: 14px 0 14px 16px; color: #333333; background: #ffffff; }
.research-theme { display: grid; grid-template-columns: 220px 1fr 220px; gap: 20px; align-items: start; padding: 24px 0; border-top: 1px solid #eeeeee; }
.research-theme:first-child { border-top: 0; padding-top: 0; }
.research-theme__number { color: #ff333f; font-size: 12px; font-weight: 700; }
.research-theme__title { margin: 4px 0 0; color: #666666; font-size: 17px; line-height: 1.4; font-weight: 700; }
.research-theme__text { margin: 0; color: #333333; }
.research-theme__image { aspect-ratio: 4 / 3; width: 100%; }
.method-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.method-list__item { background: #ffffff; border: 1px solid #eeeeee; border-radius: 0; padding: 20px; box-shadow: none; }
.method-list__label { display: block; margin-bottom: 8px; color: #ff333f; font-weight: 700; }
.site-footer { padding: 32px 0; color: #666666; background: #ffffff; }
.site-footer__inner { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid #eeeeee; 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: #ffffff; border: 1px solid #eeeeee; border-radius: 0; }
  .nav.is-open { display: flex; }
  .language { margin: 8px 0 0; padding: 8px 0 0; border-left: 0; border-top: 1px solid #eeeeee; }
  .hero__title { font-size: 28px; }
  .hero__image, .hero__content { min-height: 340px; }
  .section { padding: 44px 0; }
  .section__head, .site-footer__inner { display: grid; }
}