.page-about {
  --about-pad: clamp(52px, 8vw, 96px);
  --about-track-pad: clamp(18px, 3vw, 28px);
  background: var(--paper);
  color: var(--text);
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 24px);
  padding-bottom: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(40px, 6vw, 80px) 0 clamp(48px, 7vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 162, 94, .09) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(201, 162, 94, .09) 0 1px, transparent 1px 88px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  align-items: end;
}

.page-about .about-hero__eyebrow {
  color: var(--gold);
  letter-spacing: .18em;
  margin: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.95rem, 5.4vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: .01em;
  color: var(--paper);
  margin: .4em 0 .55em;
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.75;
  color: rgba(242, 235, 221, .82);
}

.page-about .about-hero__facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: clamp(14px, 2vw, 20px) 0 0;
  border-top: 1px solid var(--hairline-gold);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.6vw, 1.75rem);
  line-height: 1.2;
  color: var(--gold-bright);
}

.page-about .about-hero__unit {
  display: block;
  margin-top: 4px;
  font-size: .75rem;
  line-height: 1.5;
  color: rgba(242, 235, 221, .68);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--hairline-gold);
}

.page-about .about-hero__caption {
  margin-top: 10px;
  font-size: .75rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: rgba(242, 235, 221, .6);
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-timeline__lede {
  max-width: 40em;
  margin: .6em 0 0;
  color: var(--ink-2);
  line-height: 1.75;
}

.page-about .about-timeline__head h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: .35em 0 0;
  color: var(--ink);
}

.page-about .about-timeline__layout {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-years__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--muted);
}

.page-about .about-years__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-years__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .06em;
  padding: 6px 12px;
  border: 1px solid var(--hairline-gold);
  background: var(--card);
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--ink);
  border-color: var(--gold);
  background: rgba(201, 162, 94, .16);
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-track-pad);
  border-left: 1px solid var(--hairline);
}

.page-about .about-track__item {
  position: relative;
  padding-bottom: clamp(28px, 4vw, 44px);
  scroll-margin-top: 120px;
  transition: background-color .22s var(--ease);
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  top: .6em;
  left: calc(-1 * var(--about-track-pad) - 4px);
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 50%;
}

.page-about .about-track__item:target {
  background: linear-gradient(90deg, rgba(201, 162, 94, .2), rgba(201, 162, 94, 0) 72%);
}

.page-about .about-track__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .14em;
  color: var(--brick);
}

.page-about .about-track__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  line-height: 1.4;
  margin: 0 0 .55em;
  color: var(--ink);
}

.page-about .about-track__text {
  margin: 0;
  max-width: 44em;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--ink-2);
}

@media (min-width: 900px) {
  .page-about .about-timeline__layout {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: 88px;
  }

  .page-about .about-years__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--hairline);
  }

  .page-about .about-years__link {
    display: block;
    padding: 8px 0 8px 14px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
  }

  .page-about .about-years__link:hover,
  .page-about .about-years__link:focus-visible {
    background: rgba(201, 162, 94, .14);
    border-left-color: var(--gold);
  }

  .page-about .about-track__item:nth-child(even) .about-track__text {
    max-width: 38em;
  }
}

/* ---------- 数据进柜 ---------- */
.page-about .about-data {
  padding: var(--about-pad) 0;
  background: var(--ink-2);
  color: var(--paper);
}

.page-about .about-data__head {
  max-width: 46em;
}

.page-about .about-data__eyebrow {
  color: var(--gold);
  letter-spacing: .18em;
  margin: 0;
}

.page-about .about-data h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: .35em 0 .5em;
  color: var(--paper);
}

.page-about .about-data__lede {
  margin: 0;
  line-height: 1.78;
  color: rgba(242, 235, 221, .8);
}

.page-about .about-steps {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  background: var(--hairline-gold);
}

.page-about .about-steps__item {
  background: var(--ink);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .about-steps__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-steps__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  line-height: 1.45;
  margin: 0 0 .5em;
  color: var(--paper);
}

.page-about .about-steps__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: rgba(242, 235, 221, .78);
}

.page-about .about-data__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--hairline-gold);
}

.page-about .about-data__caption {
  margin-top: 10px;
  font-size: .75rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: rgba(242, 235, 221, .62);
}

.page-about .about-data__note {
  max-width: 46em;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--hairline-gold);
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(242, 235, 221, .8);
}

.page-about .about-data__note a {
  color: var(--gold-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 760px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-team__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--hairline);
}

.page-about .about-team__caption {
  margin-top: 8px;
  font-size: .75rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-team__body h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: .35em 0 .5em;
  color: var(--ink);
}

.page-about .about-team__lede {
  margin: 0;
  max-width: 40em;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-team__roster {
  margin: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-team__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-team__role {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--brick);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--ink-2);
}

.page-about .about-team__stats {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 14px 16px;
  background: var(--card);
  border-left: 3px solid var(--gold);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-team__stats strong {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--ink);
}

@media (min-width: 640px) {
  .page-about .about-team__row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 版本 ---------- */
.page-about .about-versions {
  padding: var(--about-pad) 0;
  background: var(--card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-versions__head h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: .35em 0 .5em;
  color: var(--ink);
}

.page-about .about-versions__lede {
  max-width: 40em;
  margin: 0;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-versions__list {
  list-style: none;
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
}

.page-about .about-versions__item {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}

.page-about .about-versions__year {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .1em;
}

.page-about .about-versions__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  line-height: 1.45;
  margin: 0 0 .5em;
  color: var(--ink);
}

.page-about .about-versions__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-2);
}

@media (min-width: 820px) {
  .page-about .about-versions__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 32px);
  }
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  padding: var(--about-pad) 0;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-partners__eyebrow {
  color: var(--gold);
  letter-spacing: .18em;
  margin: 0;
}

.page-about .about-partners__head h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: .35em 0 .5em;
  color: var(--paper);
}

.page-about .about-partners__lede {
  max-width: 42em;
  margin: 0;
  line-height: 1.78;
  color: rgba(242, 235, 221, .8);
}

.page-about .about-partners__grid {
  list-style: none;
  display: grid;
  gap: clamp(20px, 3vw, 28px);
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
}

.page-about .about-partners__item {
  padding-top: 18px;
  border-top: 1px solid var(--hairline-gold);
}

.page-about .about-partners__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .about-partners__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  line-height: 1.45;
  margin: 0 0 .55em;
  color: var(--paper);
}

.page-about .about-partners__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(242, 235, 221, .76);
}

@media (min-width: 820px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 72px) 0;
  background: var(--paper);
  border-top: 1px solid var(--hairline-gold);
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  line-height: 1.3;
  margin: 0 0 .5em;
  color: var(--ink);
}

.page-about .about-cta__text {
  max-width: 40em;
  margin: 0;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years__link,
  .page-about .about-track__item {
    transition: none;
  }
}