.page-about {
  background: var(--c-ivory);
  color: var(--c-ink);
}

.page-about__layout {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 16px 16px 64px;
}

.page-about__main {
  min-width: 0;
}

.page-about section[id],
.page-about .about-chapters__link {
  scroll-margin-top: 20px;
}

.page-about a:focus-visible,
.page-about summary:focus-visible,
.page-about .about-timeline__track:focus-visible {
  outline: 2px solid var(--c-red);
  outline-offset: 3px;
  border-radius: 6px;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-sea-blue);
}

.page-about .about-eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
}

.page-about .about-section-title {
  margin: 0 0 20px;
  font-size: clamp(1.6rem, 2.6vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.page-about .about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 6px 0 18px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-deep-sea);
}

.page-about .about-breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease;
}

.page-about .about-breadcrumb a:hover {
  border-color: currentColor;
}

.page-about .about-chapters {
  margin-bottom: 24px;
}

.page-about .about-chapters__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0;
  padding: 4px 2px 8px;
  list-style: none;
  scrollbar-width: none;
}

.page-about .about-chapters__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-chapters__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--c-fog);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--c-deep-sea);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.page-about .about-chapters__link:hover {
  border-color: var(--c-sea-blue);
  background: var(--c-fog);
}

.page-about .about-chapters__num {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--c-coral);
}

.page-about .about-hero {
  margin-top: 4px;
  display: grid;
  grid-template-columns: 1fr;
  border-radius: 20px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-deep-sea) 0%, var(--c-sea-blue) 72%, var(--c-sea-blue) 100%);
  color: var(--c-ivory);
  box-shadow: var(--shadow);
}

.page-about .about-hero__copy {
  padding: 36px 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.page-about .about-hero .about-eyebrow {
  color: var(--c-sand);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-ivory);
}

.page-about .about-hero__slogan {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--c-sand);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-sand);
}

.page-about .about-hero__lead {
  max-width: 620px;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  padding: 8px 14px;
  border: 1px solid rgba(247, 244, 236, 0.3);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-ivory);
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.page-about .about-origin {
  padding: 72px 0 24px;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-origin__number {
  font-size: 72px;
  line-height: 1;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--c-sea-blue);
  opacity: 0.85;
}

.page-about .about-origin__content {
  max-width: 720px;
}

.page-about .about-origin__paragraph {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-origin__keyword-line {
  margin: 24px 0 0;
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--c-coral);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--c-deep-sea);
}

.page-about .about-origin__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 48px;
  border-top: 1px solid var(--c-fog);
}

.page-about .about-origin__stat {
  padding: 24px 16px 20px 0;
  border-bottom: 1px solid var(--c-fog);
}

.page-about .about-origin__stat-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-sea-blue);
}

.page-about .about-origin__stat-value {
  display: block;
  margin-top: 8px;
  font-size: 40px;
  line-height: 1.1;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--c-deep-sea);
}

.page-about .about-origin__stat-unit {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-ink);
}

.page-about .about-timeline {
  margin-top: 72px;
  padding: 48px 16px;
  border-radius: 24px;
  background: linear-gradient(180deg, var(--c-fog) 0%, var(--c-ivory) 100%);
}

.page-about .about-timeline__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-timeline__title {
  max-width: 640px;
}

.page-about .about-timeline__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-timeline__link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-sea-blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.18s ease;
}

.page-about .about-timeline__link:hover {
  color: var(--c-red);
}

.page-about .about-timeline__figure {
  margin: 0;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}

.page-about .about-timeline__track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: 8px;
  margin: 32px 0 0;
  padding: 12px 4px 24px;
  list-style: none;
  scrollbar-width: thin;
  scrollbar-color: var(--c-sea-blue) transparent;
}

.page-about .about-timeline__track::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline__track::-webkit-scrollbar-thumb {
  background: var(--c-sea-blue);
  border-radius: 999px;
}

.page-about .about-timeline__item {
  flex: 0 0 260px;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
}

.page-about .about-timeline__wave {
  width: 120px;
  height: 14px;
  margin-bottom: 8px;
  color: var(--c-sea-blue);
}

.page-about .about-timeline__card {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 20px;
  border: 1px solid rgba(28, 43, 48, 0.08);
  border-radius: 16px;
  background: var(--c-ivory);
  box-shadow: var(--shadow);
}

.page-about .about-timeline__version {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--c-sand);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-deep-sea);
}

.page-about .about-timeline__card h3 {
  margin: 16px 0 8px;
  font-size: 18px;
  line-height: 1.3;
  color: var(--c-deep-sea);
}

.page-about .about-timeline__card > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-about .about-timeline__details {
  margin-top: auto;
  padding-top: 10px;
}

.page-about .about-timeline__details summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-sea-blue);
  transition: color 0.18s ease;
}

.page-about .about-timeline__details summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__details summary::after {
  content: "＋";
  margin-left: 6px;
  font-weight: 700;
}

.page-about .about-timeline__details[open] summary::after {
  content: "－";
}

.page-about .about-timeline__details p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-about .about-team {
  padding: 72px 0 32px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-team__copy p {
  max-width: 640px;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about .about-team__link {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-sea-blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.18s ease;
}

.page-about .about-team__link:hover {
  color: var(--c-red);
}

.page-about .about-team__stats dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--c-fog);
  background: var(--c-fog);
}

.page-about .about-team__stat {
  padding: 18px;
  background: var(--c-ivory);
}

.page-about .about-team__stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-sea-blue);
}

.page-about .about-team__stat dd {
  margin: 8px 0 0;
  font-size: 24px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  color: var(--c-ink);
}

.page-about .about-team__figure {
  margin: 32px 0 0;
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--c-fog);
  background: var(--c-fog);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  margin: 0;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-deep-sea);
}

.page-about .about-ecosystem {
  padding: 56px 20px;
  border-radius: 24px;
  background: var(--c-deep-sea);
  color: var(--c-ivory);
}

.page-about .about-ecosystem__head {
  max-width: 680px;
}

.page-about .about-ecosystem .about-eyebrow {
  color: var(--c-sand);
}

.page-about .about-ecosystem .about-section-title {
  color: var(--c-ivory);
}

.page-about .about-ecosystem__head p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-ecosystem__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-ecosystem__item {
  padding: 24px;
  border: 1px solid rgba(247, 244, 236, 0.16);
  border-radius: 16px;
  background: rgba(247, 244, 236, 0.04);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-about .about-ecosystem__item:hover {
  background: rgba(247, 244, 236, 0.1);
  border-color: rgba(217, 164, 65, 0.6);
}

.page-about .about-ecosystem__icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  margin-bottom: 20px;
  border: 1px solid var(--c-sand);
  border-radius: 50%;
  font-size: 20px;
  color: var(--c-sand);
}

.page-about .about-ecosystem__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--c-ivory);
}

.page-about .about-ecosystem__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-scope {
  padding: 72px 0 32px;
}

.page-about .about-scope__intro {
  max-width: 680px;
}

.page-about .about-scope__intro p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about .about-scope__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 36px;
}

.page-about .about-scope__yes,
.page-about .about-scope__no {
  padding: 24px;
  border-radius: 16px;
}

.page-about .about-scope__yes {
  background: var(--c-moss);
}

.page-about .about-scope__no {
  background: var(--c-fog);
}

.page-about .about-scope__yes h3,
.page-about .about-scope__no h3 {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--c-deep-sea);
}

.page-about .about-scope__grid ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scope__grid li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-about .about-scope__grid li::before {
  content: "·";
  font-weight: 800;
  color: var(--c-red);
}

.page-about .about-scope__note {
  margin: 28px 0 0;
  padding: 20px 24px;
  border-left: 2px solid var(--c-sand);
  background: var(--c-ivory);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-about .about-scope__note a {
  font-weight: 600;
  color: var(--c-sea-blue);
  text-decoration-color: rgba(28, 120, 154, 0.4);
  text-underline-offset: 3px;
}

.page-about .about-slogan {
  position: relative;
  margin-top: 72px;
  padding: 88px 24px 96px;
  overflow: hidden;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--c-coconut) 0%, var(--c-sand) 100%);
  text-align: center;
  color: var(--c-deep-sea);
}

.page-about .about-slogan__wave {
  position: absolute;
  top: -30px;
  left: 0;
  width: 100%;
  height: 60px;
  color: var(--c-deep-sea);
  pointer-events: none;
}

.page-about .about-slogan__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 680px;
  margin-inline: auto;
}

.page-about .about-slogan .about-eyebrow {
  color: var(--c-deep-sea);
}

.page-about .about-slogan h2 {
  margin: 0;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-deep-sea);
}

.page-about .about-slogan__content > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-deep-sea);
}

.page-about .about-slogan__scenes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

.page-about .about-slogan__scenes span {
  padding: 8px 14px;
  border: 1px solid rgba(14, 76, 100, 0.2);
  border-radius: 999px;
  background: rgba(14, 76, 100, 0.1);
  font-size: 13px;
  color: var(--c-deep-sea);
}

.page-about .about-slogan__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  padding: 12px 24px;
  border: 1px solid var(--c-deep-sea);
  border-radius: 999px;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-deep-sea);
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.page-about .about-slogan__cta:hover {
  background: var(--c-deep-sea);
  color: var(--c-ivory);
}

@media (min-width: 900px) {
  .page-about__layout {
    display: grid;
    grid-template-columns: 184px minmax(0, 1fr);
    gap: 48px;
    padding: 28px 40px 96px;
  }

  .page-about .about-chapters {
    position: sticky;
    top: 28px;
    align-self: start;
    margin-top: 48px;
    padding-left: 20px;
    border-left: 1px solid var(--c-fog);
  }

  .page-about .about-chapters__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-chapters__link {
    border: 0;
    border-radius: 8px;
    background: transparent;
  }

  .page-about .about-chapters__link:hover {
    background: var(--c-fog);
  }

  .page-about .about-hero {
    grid-template-columns: 55% 45%;
    min-height: 560px;
  }

  .page-about .about-hero__copy {
    padding: 56px 48px;
  }

  .page-about .about-hero__media img {
    height: 100%;
    min-height: 560px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 24px 64px;
  }

  .page-about .about-origin__number {
    font-size: 96px;
  }

  .page-about .about-origin__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-timeline {
    padding: 72px 36px;
  }

  .page-about .about-timeline__head {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-team {
    padding: 96px 0 48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: 48px;
  }

  .page-about .about-team__stats dl {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-ecosystem {
    padding: 72px 40px;
  }

  .page-about .about-ecosystem__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-scope {
    padding: 96px 0 48px;
  }

  .page-about .about-scope__grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .page-about .about-slogan {
    padding: 104px 32px 112px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-ecosystem__list {
    grid-template-columns: repeat(4, 1fr);
  }
}