.page-about {
  --about-rail: 168px;
  --about-hair: 1px solid rgba(93, 98, 91, 0.32);
  --about-ink-soft: #33453e;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-about .media-frame {
  overflow: hidden;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--grass);
  color: var(--paper);
  padding: clamp(16px, 2.6vw, 28px) 0 clamp(34px, 5vw, 78px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: rgba(244, 239, 227, 0.22);
}

.page-about .about-breadcrumb {
  margin: 0 0 clamp(20px, 3.4vw, 40px);
}

.page-about .about-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

.page-about .about-breadcrumb .breadcrumb__link {
  color: rgba(244, 239, 227, 0.68);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-breadcrumb .breadcrumb__link:hover,
.page-about .about-breadcrumb .breadcrumb__link:focus-visible {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-about .about-breadcrumb .breadcrumb__sep {
  color: rgba(244, 239, 227, 0.34);
}

.page-about .about-breadcrumb .breadcrumb__current {
  color: var(--paper);
}

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

.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding-left: 10px;
  border-left: 3px solid var(--flame);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--flame);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-72);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(244, 239, 227, 0.8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

.page-about .about-hero__figure .media-frame {
  border: 1px solid rgba(244, 239, 227, 0.28);
  background: var(--ink);
}

.page-about .about-hero__figure .figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: rgba(244, 239, 227, 0.55);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  background: var(--sand);
  border-bottom: 1px solid rgba(93, 98, 91, 0.45);
}

.page-about .about-stats__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(93, 98, 91, 0.28);
}

.page-about .about-stats__item {
  background: var(--sand);
  padding: 16px clamp(10px, 1.8vw, 20px);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--grass);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-12);
  line-height: 1.55;
  color: #4a544d;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(36px, 5vw, 78px) 0;
  border-bottom: var(--about-hair);
}

.page-about .about-section--tint {
  background: rgba(216, 203, 180, 0.22);
}

.page-about .about-head {
  display: grid;
  gap: 8px;
  padding-top: 16px;
  border-top: 2px solid var(--grass);
  margin-bottom: clamp(22px, 3.6vw, 42px);
}

.page-about .about-head__index {
  margin: 0;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--flame);
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-40);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--grass);
}

.page-about .about-head__note {
  margin: 0;
  padding-top: 6px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--line);
}

/* ---------- 起点 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-prose p {
  max-width: 66ch;
  margin: 0 0 1.1em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

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

.page-about .about-quote {
  margin: 0;
  padding: clamp(16px, 2vw, 24px);
  border-left: 3px solid var(--flame);
  background: rgba(216, 203, 180, 0.34);
}

.page-about .about-quote__text {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  line-height: 1.6;
  color: var(--grass);
}

.page-about .about-quote__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--line);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(12px, 1.8vw, 20px);
}

.page-about .team-card {
  background: var(--paper);
  border: var(--about-hair);
  border-left: 3px solid var(--grass);
  padding: clamp(15px, 2vw, 22px);
  transition: border-color 0.22s ease;
}

.page-about .team-card:hover {
  border-color: var(--line);
  border-left-color: var(--flame);
}

.page-about .team-card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: var(--about-hair);
}

.page-about .team-card__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--grass);
  transition: color 0.22s ease;
}

.page-about .team-card:hover .team-card__no {
  color: var(--flame);
}

.page-about .team-card__count {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--flame);
}

.page-about .team-card__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  line-height: 1.35;
  color: var(--grass);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .about-team__figure {
  margin: 0;
  grid-column: 1 / -1;
}

.page-about .about-team__figure .figure-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--line);
}

/* ---------- 内容线 ---------- */
.page-about .about-method {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

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

.page-about .about-line {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 24px) 0;
  border-bottom: var(--about-hair);
}

.page-about .about-line__tag {
  justify-self: start;
  align-self: start;
  margin: 0;
  padding: 3px 9px;
  background: var(--sand);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--grass);
}

.page-about .about-line__title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  line-height: 1.35;
  color: var(--grass);
}

.page-about .about-line__body p {
  max-width: 56ch;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-method__side {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  align-content: start;
}

.page-about .about-method__side figure {
  margin: 0;
}

.page-about .about-method__side .figure-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--line);
}

.page-about .about-fields {
  border: var(--about-hair);
  background: rgba(216, 203, 180, 0.3);
  padding: 14px 16px;
}

.page-about .about-fields__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--line);
}

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

.page-about .about-fields__list li {
  padding: 2px 10px;
  border: 1px solid rgba(14, 59, 46, 0.35);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--grass);
}

/* ---------- 协作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 0;
  margin-bottom: clamp(18px, 3vw, 28px);
  border-top: var(--about-hair);
}

.page-about .partner {
  padding: clamp(14px, 2vw, 20px) 0;
  border-bottom: var(--about-hair);
}

.page-about .partner__top {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 6px;
}

.page-about .partner__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--grass);
}

.page-about .partner__label {
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  color: var(--grass);
}

.page-about .partner__desc {
  max-width: 52ch;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-partners__note {
  max-width: 78ch;
  margin: 0;
  padding-top: clamp(12px, 2vw, 18px);
  border-top: var(--about-hair);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-rail {
  padding-left: 14px;
  border-left: 2px solid var(--grass);
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--line);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  font-size: var(--fs-14);
  color: var(--about-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--grass);
  border-bottom-color: var(--flame);
}

.page-about .about-rail__y {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--flame);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--grass), rgba(14, 59, 46, 0.12));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(10px, 1.6vw, 16px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 13px;
  width: 15px;
  height: 15px;
  background: var(--paper);
  border: 2px solid var(--grass);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-timeline__item:hover::before {
  background: var(--flame);
  border-color: var(--flame);
}

.page-about .timeline-node {
  border-bottom: var(--about-hair);
}

.page-about .timeline-node__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 10px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline-node__sum::-webkit-details-marker {
  display: none;
}

.page-about .timeline-node__sum::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--flame);
}

.page-about .timeline-node[open] .timeline-node__sum::after {
  content: "－";
}

.page-about .timeline-node__seat {
  padding: 1px 7px;
  background: rgba(216, 203, 180, 0.55);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--line);
}

.page-about .timeline-node__year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--grass);
}

.page-about .timeline-node__title {
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  line-height: 1.35;
  color: var(--grass);
}

.page-about .timeline-node__body {
  padding: 0 0 14px;
}

.page-about .timeline-node__body p {
  max-width: 58ch;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 合作入口 ---------- */
.page-about .about-cta {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(36px, 5vw, 76px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-cta__index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--flame);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: var(--fs-40);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .about-cta__text {
  max-width: 56ch;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(244, 239, 227, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(244, 239, 227, 0.22);
}

.page-about .about-cta__list li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(244, 239, 227, 0.16);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(244, 239, 227, 0.72);
}

.page-about .about-cta__k {
  display: inline-block;
  min-width: 76px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--flame);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-line {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 0 22px;
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .team-card:nth-child(1) { min-height: 196px; }
  .page-about .team-card:nth-child(2) { min-height: 236px; }
  .page-about .team-card:nth-child(3) { min-height: 214px; }
  .page-about .team-card:nth-child(4) { min-height: 184px; }
}

@media (min-width: 780px) {
  .page-about .about-stats__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-about .about-head {
    grid-template-columns: 74px minmax(0, 1fr) minmax(0, 26ch);
    align-items: start;
    gap: 0 26px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(16px, 2.4vw, 30px);
    border-top: 0;
  }

  .page-about .partner {
    padding: clamp(14px, 1.8vw, 20px) 0 0;
    border-bottom: 0;
    border-top: 2px solid var(--grass);
  }

  .page-about .about-milestones {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 48px);
    align-items: start;
  }

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

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-method {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 0.82fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    grid-column: 3;
    grid-row: 1 / span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-card__no,
  .page-about .about-timeline__item::before,
  .page-about .about-rail__list a,
  .page-about .about-breadcrumb .breadcrumb__link {
    transition: none;
  }
}
<<<END>>>