.page-about {
  --about-gap: clamp(3.25rem, 8vw, 6.5rem);
  --about-line-soft: rgba(169, 130, 71, .42);
  color: var(--ink);
  font-family: var(--sans);
  background-color: var(--paper);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about h1 {
  font-size: clamp(2.1rem, 6.2vw, 4rem);
  line-height: 1.14;
}

.page-about h2 {
  font-size: clamp(1.6rem, 3.6vw, 2.45rem);
  line-height: 1.24;
}

.page-about h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.4;
}

.page-about p {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--brick-deep);
}

.page-about a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid rgba(178, 58, 43, .35);
  transition: border-color .18s var(--ease-out), color .18s var(--ease-out);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--red-deep);
  border-bottom-color: var(--red-deep);
}

.page-about .about-section {
  position: relative;
  padding-block: var(--about-gap);
}

.page-about .about-section--warm {
  background-color: var(--paper-warm);
}

.page-about .about-section--paper {
  background-color: var(--paper);
}

/* ---------- 竖排小标签 ---------- */
.page-about .about-vlabel {
  display: inline-block;
  font-family: var(--sans);
  font-size: .7rem;
  line-height: 1;
  letter-spacing: .28em;
  color: var(--celadon);
  border: 1px solid rgba(95, 133, 116, .38);
  border-radius: 2px;
  padding: .45rem .6rem;
  margin-bottom: .9rem;
  white-space: nowrap;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-bottom: var(--about-gap);
}

.page-about .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-hero__figure {
  margin: 0;
  max-width: 24rem;
}

.page-about .about-hero__media {
  overflow: hidden;
  aspect-ratio: 3 / 4;
  border-radius: 6rem 1rem 6rem 1rem;
  background-color: var(--line);
  box-shadow: 0 30px 60px -46px rgba(33, 30, 27, .75);
}

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

.page-about .about-hero__caption,
.page-about .about-figure__caption {
  display: block;
  margin-top: .8rem;
  font-size: .8125rem;
  line-height: 1.65;
  letter-spacing: .04em;
  color: var(--brick);
}

.page-about .about-hero__lead {
  margin-top: clamp(1.1rem, 3vw, 1.6rem);
  max-width: 34rem;
  font-size: clamp(1.05rem, 1.4vw, 1.16rem);
}

.page-about .about-hero__note {
  margin-top: 1rem;
  max-width: 34rem;
  color: var(--brick);
}

/* ---------- 章节标题组 ---------- */
.page-about .about-head {
  display: grid;
  gap: .9rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-head .about-vlabel {
  margin-bottom: 0;
}

.page-about .about-head__sub {
  margin-top: .9rem;
  max-width: 36rem;
  color: var(--brick);
}

/* ---------- 叙事章节 ---------- */
.page-about .about-narrative {
  display: grid;
  gap: 1.25rem;
  max-width: 38rem;
}

.page-about .about-quote {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  max-width: 30rem;
  padding: clamp(1.35rem, 3vw, 2rem) clamp(1.25rem, 3vw, 2.1rem);
  background-color: var(--brick-deep);
  border-left: 3px solid var(--brass);
  border-radius: 0 2rem 2rem 0;
}

.page-about .about-quote p {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--paper);
}

/* ---------- 走访流程 ---------- */
.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: .2rem 1rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__num {
  font-family: var(--serif);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--brass);
}

.page-about .about-flow__body h3 {
  margin-bottom: .35rem;
}

.page-about .about-flow__body p {
  max-width: 30rem;
  font-size: .98rem;
  color: var(--brick);
}

.page-about .about-flow__figure {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  border-radius: 1.25rem 5rem 1.25rem 1.25rem;
  background-color: var(--line);
}

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

/* ---------- 数字块 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 1.25rem;
}

.page-about .about-stats__item {
  padding-top: 1rem;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-stats__num {
  font-family: var(--serif);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 6.4vw, 3.6rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-stats__unit {
  margin-left: .3rem;
  font-size: .875rem;
  letter-spacing: .05em;
  color: var(--brass);
}

.page-about .about-stats__label {
  margin-top: .7rem;
  max-width: 17rem;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--brick);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__row {
  position: relative;
  display: grid;
  gap: .85rem;
  padding: clamp(1.3rem, 3vw, 2rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__lead {
  display: flex;
  align-items: baseline;
  gap: .7rem;
}

.page-about .about-team__count {
  font-family: var(--serif);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--brass);
}

.page-about .about-team__body p {
  max-width: 34rem;
  color: var(--brick);
}

.page-about .about-team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .9rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__tags li {
  padding: .42rem .7rem;
  font-size: .8rem;
  line-height: 1;
  color: var(--brick-deep);
  background-color: var(--paper-warm);
  border: 1px solid rgba(217, 210, 199, .9);
  border-radius: 999px;
  transition: color .18s var(--ease-out), border-color .18s var(--ease-out);
}

/* ---------- 服务商 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--serif);
  font-variant-numeric: tabular-nums;
  font-size: clamp(3rem, 9vw, 4.75rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--red);
}

.page-about .about-partners__label {
  margin-top: .75rem;
  max-width: 20rem;
  font-size: .95rem;
  color: var(--brick);
}

.page-about .about-partners__types {
  display: flex;
  gap: .85rem;
  margin: 0 0 1.5rem;
  padding: 0 0 .9rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-partners__types li {
  flex: 0 0 11.5rem;
  scroll-snap-align: start;
  padding: 1.1rem 1.15rem;
  background-color: var(--paper);
  border: 1px solid rgba(217, 210, 199, .95);
  border-radius: 1.5rem 1.5rem 1.5rem .35rem;
}

.page-about .about-partners__types h3 {
  margin-bottom: .4rem;
  font-size: 1.05rem;
}

.page-about .about-partners__types p {
  font-size: .875rem;
  line-height: 1.7;
  color: var(--brick);
}

.page-about .about-partners__note {
  max-width: 38rem;
  color: var(--brick-deep);
}

.page-about .about-partners__main .btn {
  display: inline-block;
  margin-top: 1.35rem;
  border-bottom: 0;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-versions__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 1.9rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: .4rem;
  top: 1.15rem;
  bottom: 1.5rem;
  width: 1px;
  background: linear-gradient(180deg, var(--brass), rgba(169, 130, 71, .12));
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__dot {
  position: absolute;
  top: 1.7rem;
  left: -1.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--brass);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px var(--paper-warm);
  transition: background-color .18s var(--ease-out);
}

.page-about .about-timeline__trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1.1rem;
  grid-template-areas:
    "ver mark"
    "title mark";
  gap: .3rem 1rem;
  width: 100%;
  padding: 1.15rem 0 .4rem;
  background: none;
  border: 0;
  border-top: 1px solid var(--line);
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.page-about .about-timeline__trigger:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 3px;
}

.page-about .about-timeline__ver {
  grid-area: ver;
  font-family: var(--sans);
  font-size: .76rem;
  line-height: 1.4;
  letter-spacing: .18em;
  color: var(--celadon);
}

.page-about .about-timeline__title {
  grid-area: title;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
  transition: color .18s var(--ease-out);
}

.page-about .about-timeline__mark {
  grid-area: mark;
  align-self: center;
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--brass);
  border-bottom: 1px solid var(--brass);
  transform: rotate(45deg);
  transition: transform .22s var(--ease-out);
}

.page-about .about-timeline__item[data-open="true"] .about-timeline__mark {
  transform: rotate(225deg);
}

.page-about .about-timeline__trigger:hover .about-timeline__title {
  color: var(--red);
}

.page-about .about-timeline__trigger:hover + .about-timeline__panel,
.page-about .about-timeline__item[data-open="true"] .about-timeline__dot {
  background-color: var(--red);
}

.page-about .about-timeline__panel {
  padding: 0 0 1.2rem;
}

.page-about .about-timeline__panel p {
  max-width: 30rem;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--brick);
}

.page-about .about-timeline__item[data-open="false"] .about-timeline__panel {
  display: none;
}

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

.page-about .about-versions__media {
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border-radius: 5rem 1rem 1rem 5rem;
  background-color: var(--line);
}

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

.page-about .about-versions__more {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: .95rem;
  color: var(--brick);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1.75rem, 4vw, 3.5rem);
  }

  .page-about .about-flow__item {
    grid-template-columns: 2.75rem minmax(0, 1fr);
  }

  .page-about .about-partners__types {
    overflow: visible;
    flex-wrap: wrap;
    padding-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-vlabel {
    writing-mode: vertical-rl;
    padding: .8rem .3rem;
    margin-bottom: 0;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: center;
  }

  .page-about .about-hero__figure {
    max-width: none;
  }

  .page-about .about-hero__text {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 1.6rem;
    align-items: start;
  }

  .page-about .about-hero__text .about-vlabel {
    grid-row: 1 / -1;
  }

  .page-about .about-hero__text h1,
  .page-about .about-hero__text p {
    grid-column: 2;
  }

  .page-about .about-head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 1.6rem;
    align-items: start;
  }

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

  .page-about .about-stats__item {
    padding: 1.25rem 1.5rem 0 0;
  }

  .page-about .about-stats__item + .about-stats__item {
    padding-left: 1.5rem;
    border-left: 1px solid var(--about-line-soft);
  }

  .page-about .about-team__row {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
    transition: background-color .18s var(--ease-out);
  }

  .page-about .about-team__row::before {
    content: "";
    position: absolute;
    left: -1.5rem;
    top: clamp(1.3rem, 3vw, 2rem);
    bottom: clamp(1.3rem, 3vw, 2rem);
    width: 3px;
    background-color: var(--brass);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform .2s var(--ease-out);
  }

  .page-about .about-team__row:hover::before,
  .page-about .about-team__row:focus-within::before {
    transform: scaleY(1);
  }

  .page-about .about-team__row:hover .about-team__tags li {
    color: var(--red);
    border-color: rgba(178, 58, 43, .3);
  }

  .page-about .about-team__row:nth-child(even) {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-about .about-team__row:nth-child(even) .about-team__lead {
    order: 2;
  }

  .page-about .about-team__row:nth-child(even) .about-team__body {
    order: 1;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-partners__types {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: .75rem;
  }

  .page-about .about-partners__types li {
    flex: none;
    padding: 1rem .95rem;
  }

  .page-about .about-versions__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-versions__figure {
    position: sticky;
    top: calc(var(--index-h) + 2rem);
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 4.5rem;
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    top: .6rem;
    bottom: .6rem;
  }

  .page-about .about-timeline__item {
    grid-column: 1;
  }

  .page-about .about-timeline__item:nth-child(even) {
    grid-column: 2;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__dot {
    left: auto;
    right: -2.25rem;
    transform: translateX(50%);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__dot {
    left: -2.25rem;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__trigger {
    border-top-color: var(--line);
  }
}

@media (min-width: 1180px) {
  .page-about .about-stats__label {
    max-width: 15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__mark,
  .page-about .about-timeline__dot,
  .page-about .about-team__row::before,
  .page-about .about-team__tags li {
    transition: none;
  }
}
<<<END>>>