.page-about {
  --about-rail: 168px;
  --about-flow-gap: clamp(40px, 6vw, 88px);
  --about-chapter-gap: clamp(56px, 9vw, 124px);
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-about .wrap {
  min-width: 0;
}

/* ---------- 开篇 ---------- */

.page-about .about-open {
  border-bottom: var(--line);
  padding: clamp(40px, 6vw, 84px) 0 clamp(48px, 7vw, 92px);
}

.page-about .about-open__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  align-items: start;
}

.page-about .about-open__kicker {
  margin: 26px 0 0;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-about .about-open__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2.2rem, 7.4vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-open__text {
  margin: 26px 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-open__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
  border-bottom: var(--line);
}

.page-about .about-open__facts li {
  padding: 16px 0;
  border-bottom: 1.5px solid rgba(22, 21, 19, 0.15);
}

.page-about .about-open__facts li:last-child {
  border-bottom: 0;
}

.page-about .about-open__fig {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.page-about .about-open__lab {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

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

.page-about .figure__media {
  overflow: hidden;
  background: var(--sand);
}

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

.page-about .figure__cap {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 画册主体：左轨 + 正文 ---------- */

.page-about .absheet {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-flow-gap);
  padding-top: clamp(40px, 6vw, 84px);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .absheet__rail {
  border-bottom: var(--line);
  padding-bottom: 14px;
  overflow-x: auto;
}

.page-about .absheet__list {
  display: flex;
  flex-direction: row;
  gap: 26px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
}

.page-about .absheet__item {
  flex: 0 0 auto;
}

.page-about .absheet__link {
  display: block;
  min-width: 44px;
  padding: 4px 2px;
  text-decoration: none;
  color: var(--slate);
  transition: color 180ms ease;
}

.page-about .absheet__link:hover,
.page-about .absheet__link:focus-visible {
  color: var(--flame);
}

.page-about .absheet__n {
  display: block;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(1.6rem, 5.6vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: currentColor;
}

.page-about .absheet__n-name {
  display: block;
  margin-top: 6px;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about .absheet__flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .chapter + .chapter {
  margin-top: var(--about-chapter-gap);
  padding-top: clamp(46px, 7vw, 88px);
  border-top: var(--line);
}

.page-about .chapter__kicker {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-about .chapter__title {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.75rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .chapter__lead {
  margin: 0 0 1.3em;
  max-width: 60ch;
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.78;
  color: var(--rock);
}

.page-about .chapter__body p {
  margin: 0 0 1.2em;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.85;
}

.page-about .chapter__body p:last-child {
  margin-bottom: 0;
}

/* 深色章节 */

.page-about .chapter.chapter--dark {
  border: var(--line);
  background: var(--rock);
  color: var(--cream);
  padding: clamp(30px, 5vw, 56px);
  box-shadow: var(--shadow);
}

.page-about .chapter--dark .chapter__kicker {
  color: var(--glow);
}

.page-about .chapter--dark .chapter__title {
  color: var(--cream);
}

.page-about .chapter--dark .chapter__lead {
  color: rgba(244, 239, 229, 0.86);
}

.page-about .chapter--dark .chapter__lead:last-child {
  margin-bottom: 0;
}

/* ---------- 四条主线 ---------- */

.page-about .lines {
  margin-top: clamp(28px, 4vw, 48px);
  border-top: var(--line);
}

.page-about .lineup {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(22px, 3.4vw, 34px) 0;
  border-bottom: 1.5px solid rgba(22, 21, 19, 0.2);
  border-left: 6px solid var(--moss);
  padding-left: 18px;
}

.page-about .lineup--cyan {
  border-left-color: var(--cyan);
}

.page-about .lineup--clay {
  border-left-color: var(--clay);
}

.page-about .lineup--flame {
  border-left-color: var(--flame);
}

.page-about .lineup__num {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--slate);
}

.page-about .lineup__main {
  min-width: 0;
}

.page-about .lineup__title {
  margin: 0;
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .lineup__sub {
  margin: 6px 0 0;
  font-family: var(--font-data);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .lineup__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 1.02rem;
  line-height: 1.85;
}

.page-about .lineup__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 版本阶梯 ---------- */

.page-about .ladder {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
  margin: clamp(24px, 4vw, 40px) 0 clamp(20px, 3vw, 30px);
}

.page-about .ladder-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0 0 clamp(26px, 4vw, 40px);
  padding: 0;
  list-style: none;
  border-top: 1.5px solid rgba(244, 239, 229, 0.3);
}

.page-about .ladder-legend__item {
  padding: 16px 0;
  border-bottom: 1.5px solid rgba(244, 239, 229, 0.3);
  font-size: 1rem;
  font-weight: 500;
  color: var(--cream);
}

.page-about .ladder-legend__tag {
  display: inline-block;
  margin-right: 10px;
  padding: 3px 8px;
  border: 1.5px solid var(--glow);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--glow);
  vertical-align: 2px;
}

.page-about .ladder-legend__item em {
  display: block;
  margin-top: 7px;
  font-style: normal;
  font-size: 0.86rem;
  line-height: 1.65;
  color: rgba(244, 239, 229, 0.7);
}

/* ---------- 团队 ---------- */

.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .crew {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .crew__item {
  padding: 22px 0;
  border-bottom: 1.5px solid rgba(22, 21, 19, 0.2);
}

.page-about .crew__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.page-about .crew__name {
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .crew__count {
  font-family: var(--font-data);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  color: var(--clay);
  white-space: nowrap;
}

.page-about .crew__brief {
  margin: 10px 0 0;
  font-size: 1.02rem;
  line-height: 1.75;
}

.page-about .crew__detail {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-4px);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--slate);
  transition: max-height 300ms ease, opacity 220ms ease, transform 220ms ease, margin-top 220ms ease;
}

.page-about .crew__item:hover .crew__detail,
.page-about .crew__item:focus-within .crew__detail {
  max-height: 260px;
  opacity: 1;
  transform: translateY(0);
  margin-top: 12px;
}

.page-about .crew-grid__figure {
  margin: 0;
}

/* ---------- 伙伴 ---------- */

.page-about .partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: clamp(20px, 3vw, 32px);
  border-top: var(--line);
}

.page-about .partners__item {
  padding: clamp(20px, 3vw, 30px) 0;
  border-bottom: 1.5px solid rgba(22, 21, 19, 0.2);
}

.page-about .partners__title {
  margin: 0 0 10px;
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .partners__title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 10px;
  background: var(--cyan);
  vertical-align: 1px;
}

.page-about .partners__item:nth-child(2) .partners__title::before {
  background: var(--clay);
}

.page-about .partners__item:nth-child(3) .partners__title::before {
  background: var(--flame);
}

.page-about .partners__text {
  margin: 0;
  max-width: 62ch;
  font-size: 1.02rem;
  line-height: 1.85;
}

.page-about .partners__cta {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

/* ---------- 三件事 ---------- */

.page-about .beliefs {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .beliefs__item {
  position: relative;
  padding: clamp(22px, 3.4vw, 34px) 0 clamp(22px, 3.4vw, 34px) clamp(0px, 4vw, 56px);
  border-bottom: 1.5px solid rgba(22, 21, 19, 0.2);
}

.page-about .beliefs__n {
  position: absolute;
  left: 0;
  top: clamp(22px, 3.4vw, 34px);
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1;
  color: var(--flame);
}

.page-about .beliefs__title {
  margin: 0 0 10px;
  font-size: clamp(1.15rem, 2.1vw, 1.45rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .beliefs__text {
  margin: 0;
  max-width: 60ch;
  font-size: 1.02rem;
  line-height: 1.85;
}

/* ---------- 引文块 ---------- */

.page-about .pullquote {
  margin: clamp(44px, 7vw, 84px) 0 0;
  border-top: var(--line);
  border-bottom: var(--line);
  padding: clamp(26px, 4vw, 42px) 0;
}

.page-about .pullquote__btn {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: var(--ink);
}

.page-about .pullquote__text {
  display: block;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.35rem, 4vw, 2.5rem);
  line-height: 1.24;
  letter-spacing: -0.02em;
}

.page-about .pullquote__hint {
  display: inline-block;
  margin-top: 18px;
  padding: 6px 12px;
  border: 1.5px solid var(--ink);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.page-about .pullquote__btn:hover .pullquote__hint,
.page-about .pullquote__btn:focus-visible .pullquote__hint {
  background: var(--flame);
  border-color: var(--flame);
  color: var(--ink);
}

.page-about .pullquote__btn:focus-visible {
  outline: 3px solid var(--flame);
  outline-offset: 4px;
}

.page-about .pullquote .acc__panel-inner {
  padding-top: 18px;
}

.page-about .pullquote .acc__panel-inner p {
  margin: 0;
  max-width: 58ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--rock);
}

/* ---------- 收束 ---------- */

.page-about .about-close {
  padding: clamp(46px, 7vw, 92px) 0 clamp(56px, 8vw, 108px);
  border-top: var(--line);
}

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

.page-about .about-close__body {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-close__title {
  margin: 0 0 16px;
  font-size: clamp(1.4rem, 3.2vw, 2.35rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .about-close__text {
  margin: 0;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.85;
}

.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-open__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-open__facts li {
    border-bottom: 0;
    border-left: 1.5px solid rgba(22, 21, 19, 0.15);
    padding: 16px 18px;
  }

  .page-about .about-open__facts li:first-child {
    border-left: 0;
    padding-left: 0;
  }

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

  .page-about .ladder-legend__item {
    padding-right: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-open__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ladder-legend {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ladder-legend__item {
    border-bottom: 0;
    border-right: 1.5px solid rgba(244, 239, 229, 0.3);
    padding: 16px 16px;
  }

  .page-about .ladder-legend__item:first-child {
    padding-left: 0;
  }

  .page-about .ladder-legend__item:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .crew-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .crew__detail {
    max-height: none;
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 899px) {
  .page-about .crew__detail {
    max-height: none;
    opacity: 1;
    transform: none;
    margin-top: 12px;
  }
}

@media (min-width: 1040px) {
  .page-about .absheet {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-flow-gap);
  }

  .page-about .absheet__rail {
    position: sticky;
    top: 112px;
    align-self: start;
    border-bottom: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .absheet__list {
    flex-direction: column;
    gap: 28px;
  }

  .page-about .absheet__n {
    font-size: clamp(2rem, 2.6vw, 2.9rem);
  }

  .page-about .lineup {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 0 26px;
  }

  .page-about .lineup__num {
    padding-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .absheet__link,
  .page-about .crew__detail,
  .page-about .pullquote__hint {
    transition: none;
  }
}
<<<END>>>