.page-about {
  --about-pad: clamp(20px, 3vw, 32px);
  --about-gap: clamp(28px, 5vw, 64px);
  background: var(--z9-deep);
  color: var(--z9-cream);
}

.page-about a {
  color: inherit;
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: clamp(34px, 6vw, 84px) 0 clamp(28px, 4.5vw, 60px);
  border-bottom: 1px solid var(--z9-line);
  background:
    radial-gradient(130% 90% at 84% 4%, rgba(61, 232, 210, 0.13), transparent 60%),
    radial-gradient(90% 70% at 6% 96%, rgba(255, 107, 44, 0.09), transparent 66%),
    linear-gradient(178deg, #082038 0%, var(--z9-deep) 74%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(27, 58, 82, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 58, 82, 0.5) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(38px, 8vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--z9-white);
  max-width: 15em;
  overflow-wrap: break-word;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 42em;
  color: var(--z9-cream);
  opacity: 0.88;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--z9-line);
}

.page-about .about-hero__stat dt {
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-mist);
}

.page-about .about-hero__stat dd {
  margin: 8px 0 0;
  font-family: var(--z9-narrow);
  font-size: clamp(34px, 7vw, 52px);
  font-weight: 800;
  line-height: 0.9;
  color: var(--z9-white);
}

.page-about .about-hero__stat dd.is-cyan {
  color: var(--z9-cyan);
}

.page-about .about-hero__stat dd.is-orange {
  color: var(--z9-orange);
}

/* ---------- origin ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-origin__figure {
  margin: 0;
  border: 1px solid var(--z9-line);
  background: var(--z9-panel);
  padding: 10px;
}

.page-about .about-origin__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-about .about-origin__caption {
  margin-top: 10px;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-mist);
}

.page-about .about-origin__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 5.6vw, 54px);
  line-height: 1.08;
  color: var(--z9-white);
}

.page-about .about-origin__text {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: var(--z9-cream);
  opacity: 0.86;
}

.page-about .about-compare {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  background: var(--z9-line);
  border: 1px solid var(--z9-line);
}

.page-about .about-compare__col {
  background: var(--z9-panel);
  padding: var(--about-pad);
}

.page-about .about-compare__col--now {
  background:
    linear-gradient(155deg, rgba(61, 232, 210, 0.1), rgba(12, 36, 56, 1) 62%);
}

.page-about .about-compare__label {
  margin: 0;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-mist);
}

.page-about .about-compare__num {
  margin: 12px 0 0;
  font-family: var(--z9-narrow);
  font-size: clamp(60px, 14vw, 108px);
  font-weight: 800;
  line-height: 0.84;
  color: var(--z9-white);
}

.page-about .about-compare__col--now .about-compare__num {
  color: var(--z9-cyan);
}

.page-about .about-compare__unit {
  margin: 12px 0 0;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--z9-gold);
}

.page-about .about-compare__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--z9-mist);
}

.page-about .about-origin__why {
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--z9-orange);
  max-width: 44em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--z9-cream);
  opacity: 0.82;
}

/* ---------- timeline ---------- */
.page-about .about-timeline__rail {
  display: flex;
  flex-direction: column;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--z9-line);
  list-style: none;
}

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 30px;
  outline: none;
}

.page-about .about-timeline__node:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--z9-gold);
  box-shadow: 0 0 0 4px rgba(216, 179, 114, 0.14);
  transition: background-color 0.3s var(--z9-ease), box-shadow 0.3s var(--z9-ease);
}

.page-about .about-timeline__season {
  margin: 0;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-mist);
}

.page-about .about-timeline__gain {
  margin: 8px 0 0;
  font-family: var(--z9-narrow);
  font-size: clamp(20px, 3.2vw, 26px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--z9-white);
}

.page-about .about-timeline__note {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--z9-mist);
}

/* ---------- team ---------- */
.page-about .about-team__figure {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--z9-line);
  filter: saturate(0.82);
}

.page-about .about-team__cols {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: var(--z9-line);
  border: 1px solid var(--z9-line);
}

.page-about .about-team__col {
  background: var(--z9-panel);
  padding: var(--about-pad);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--z9-narrow);
  font-size: clamp(54px, 11vw, 88px);
  font-weight: 800;
  line-height: 0.84;
  color: var(--z9-white);
}

.page-about .about-team__num.is-cyan {
  color: var(--z9-cyan);
}

.page-about .about-team__num.is-orange {
  color: var(--z9-orange);
}

.page-about .about-team__num.is-gold {
  color: var(--z9-gold);
}

.page-about .about-team__role {
  margin: 14px 0 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--z9-white);
}

.page-about .about-team__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--z9-mist);
}

.page-about .about-team__more {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--z9-line);
}

.page-about .about-team__more summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-cyan);
}

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

.page-about .about-team__more summary::before {
  content: "+";
  display: inline-block;
  font-size: 14px;
  line-height: 1;
  transition: transform 0.24s var(--z9-ease);
}

.page-about .about-team__more[open] summary::before {
  transform: rotate(45deg);
}

.page-about .about-team__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--z9-cream);
  opacity: 0.82;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--z9-gold);
}

/* ---------- partners ---------- */
.page-about .about-partners__scroller {
  margin-top: clamp(24px, 4vw, 42px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 10px;
}

.page-about .about-partners__list {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 2px 0 2px;
  list-style: none;
}

.page-about .about-partners__card {
  flex: 0 0 auto;
  width: min(320px, 78vw);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  padding: 24px 22px;
  background: var(--z9-panel);
  border: 1px solid var(--z9-line);
  border-top: 2px solid var(--z9-cyan);
  transition: border-color 0.24s var(--z9-ease), transform 0.24s var(--z9-ease);
}

.page-about .about-partners__card:hover {
  border-top-color: var(--z9-orange);
  transform: translateY(-3px);
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--z9-narrow);
  font-size: clamp(50px, 10vw, 72px);
  font-weight: 800;
  line-height: 0.85;
  color: var(--z9-cyan);
}

.page-about .about-partners__name {
  margin: 10px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--z9-white);
}

.page-about .about-partners__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--z9-mist);
}

/* ---------- versions ---------- */
.page-about .about-versions__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-versions__body .z9-title {
  margin: 12px 0 0;
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1.12;
  color: var(--z9-white);
}

.page-about .about-versions__text {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--z9-cream);
  opacity: 0.86;
}

.page-about .about-versions__list {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--z9-line);
}

.page-about .about-versions__list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--z9-line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--z9-cream);
  opacity: 0.86;
}

.page-about .about-versions__badge {
  flex: 0 0 auto;
  min-width: 62px;
  padding: 3px 8px;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: center;
  color: var(--z9-deep);
  background: var(--z9-cyan);
}

.page-about .about-versions__badge--gold {
  background: var(--z9-gold);
}

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

.page-about .about-versions__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--z9-line);
  filter: saturate(0.85) brightness(0.94);
}

.page-about .about-versions__caption {
  margin-top: 10px;
  font-family: var(--z9-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--z9-mist);
}

/* ---------- next ---------- */
.page-about .about-next {
  border-top: 1px solid var(--z9-line);
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.14;
  color: var(--z9-white);
}

.page-about .about-next__lede {
  margin: 16px 0 0;
  max-width: 42em;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__links a {
  display: inline-block;
  padding: 11px 18px;
  border: 1px solid var(--z9-line);
  background: var(--z9-panel);
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--z9-cream);
  transition: border-color 0.2s var(--z9-ease), color 0.2s var(--z9-ease), background-color 0.2s var(--z9-ease);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  border-color: var(--z9-cyan);
  background: rgba(61, 232, 210, 0.1);
  color: var(--z9-cyan);
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  }

  .page-about .about-origin__figure {
    margin-top: 8px;
  }

  .page-about .about-timeline__rail {
    flex-direction: row;
    gap: 0 clamp(14px, 2.4vw, 32px);
    padding: 26px 0 0;
    border-left: 0;
    border-top: 1px solid var(--z9-line);
  }

  .page-about .about-timeline__node {
    flex: 1 1 0;
    min-width: 0;
    padding: 0 0 8px;
  }

  .page-about .about-timeline__node:last-child {
    padding-bottom: 8px;
  }

  .page-about .about-timeline__node::before {
    left: 0;
    top: -31px;
  }

  .page-about .about-timeline__node:hover::before,
  .page-about .about-timeline__node:focus::before {
    background: var(--z9-cyan);
    box-shadow: 0 0 0 5px rgba(61, 232, 210, 0.16);
  }

  .page-about .about-timeline__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.36s var(--z9-ease), opacity 0.36s var(--z9-ease), margin-top 0.36s var(--z9-ease);
    margin-top: 0;
  }

  .page-about .about-timeline__node:hover .about-timeline__note,
  .page-about .about-timeline__node:focus .about-timeline__note {
    max-height: 260px;
    opacity: 1;
    margin-top: 10px;
  }

  .page-about .about-team__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-versions__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-partners__card {
    width: 340px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-origin__grid {
    column-gap: clamp(40px, 6vw, 88px);
  }

  .page-about .about-timeline__node:nth-child(even) {
    transform: translateY(14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partners__card,
  .page-about .about-timeline__note,
  .page-about .about-next__links a,
  .page-about .about-timeline__node::before {
    transition: none;
  }

  .page-about .about-partners__card:hover {
    transform: none;
  }

  .page-about .about-timeline__node:nth-child(even) {
    transform: none;
  }
}