.page-about {
  --about-pad: clamp(20px, 5vw, 44px);
  --about-stamp-spring: var(--spring);
  --about-stamp-autumn: var(--autumn);
  --about-stamp-winter: var(--winter);
  color: var(--text);
}

.page-about .section {
  padding: clamp(44px, 7vw, 96px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 38px) 0 clamp(34px, 6vw, 68px);
  background: linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--spring) 0 25%,
    var(--summer) 25% 50%,
    var(--autumn) 50% 75%,
    var(--winter) 75% 100%);
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--stone);
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .crumbs a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .crumbs a:hover {
  border-bottom-color: var(--ink);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .about-hero__lead .eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.3rem, 7.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 40em;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-hero__meta {
  display: grid;
  border-top: 1px solid var(--line);
  align-self: end;
}

.page-about .about-hero__row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__num {
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
  color: var(--ink);
  line-height: 1;
}

.page-about .about-hero__unit {
  font-size: 14px;
  color: var(--stone);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: end;
  }
  .page-about .about-hero__meta {
    border-top-color: var(--line);
  }
}

/* ---------- 章节标题 ---------- */
.page-about .section-head {
  max-width: 46em;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-about .section-head .eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.75rem, 4.4vw, 3rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .section-head__lede {
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .section-head--split {
  max-width: none;
  display: grid;
  gap: 18px;
}

@media (min-width: 860px) {
  .page-about .section-head--split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .section-head--split .section-head__lede {
    margin: 0;
  }
}

/* ---------- 编年史 ---------- */
.page-about .chronicle-section {
  background: var(--paper);
}

.page-about .chronicle {
  display: grid;
  gap: 28px;
}

.page-about .chron-nav {
  align-self: start;
}

.page-about .chron-nav__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
}

.page-about .chron-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}

.page-about .chron-nav__item {
  flex: 0 0 auto;
}

.page-about .chron-nav__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .chron-nav__link:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-2);
}

.page-about .chron-nav__idx {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  color: var(--moss);
}

.page-about .chron-nav__link:hover .chron-nav__idx {
  color: var(--spring);
}

@media (min-width: 1024px) {
  .page-about .chronicle {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(40px, 6vw, 78px);
    align-items: start;
  }
  .page-about .chron-nav {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }
  .page-about .chron-nav__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
    padding-bottom: 0;
  }
  .page-about .chron-nav__item {
    position: relative;
  }
  .page-about .chron-nav__link {
    border: 0;
    background: transparent;
    border-radius: 0;
    padding: 12px 0 12px 18px;
    white-space: normal;
    position: relative;
  }
  .page-about .chron-nav__link::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 20px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--silver);
    transition: background .2s var(--ease), transform .2s var(--ease);
  }
  .page-about .chron-nav__item:nth-child(1) .chron-nav__link::before { background: var(--spring); }
  .page-about .chron-nav__item:nth-child(2) .chron-nav__link::before { background: var(--autumn); }
  .page-about .chron-nav__item:nth-child(3) .chron-nav__link::before { background: var(--winter); }
  .page-about .chron-nav__link:hover {
    background: transparent;
    color: var(--ink);
  }
  .page-about .chron-nav__link:hover::before {
    transform: scale(1.5);
  }
}

.page-about .era {
  padding-bottom: clamp(30px, 4vw, 46px);
}

.page-about .era + .era {
  border-top: 1px solid var(--line);
  padding-top: clamp(30px, 4vw, 46px);
}

.page-about .era__stamp {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: .08em;
  font-family: var(--font-num);
  border-radius: var(--radius);
  color: var(--ink);
}

.page-about .era__stamp--spring { background: color-mix(in srgb, var(--spring) 34%, var(--paper-2)); }
.page-about .era__stamp--autumn { background: color-mix(in srgb, var(--autumn) 28%, var(--paper-2)); }
.page-about .era__stamp--winter { background: color-mix(in srgb, var(--winter) 40%, var(--paper-2)); }

.page-about .era__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1.22;
  color: var(--ink);
}

.page-about .era__text {
  margin: 0 0 14px;
  max-width: 42em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .era-figure {
  margin: clamp(20px, 3vw, 30px) 0;
}

.page-about .era-figure .media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.page-about .era-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .era-figure--offset {
    max-width: 84%;
    margin-left: auto;
  }
  .page-about .era-figure--narrow {
    max-width: 68%;
  }
}

.page-about .era-note {
  margin: 20px 0 0;
  padding: 14px 0 14px 18px;
  border-left: 2px solid var(--autumn);
  background: linear-gradient(90deg, color-mix(in srgb, var(--autumn) 8%, transparent), transparent 70%);
}

.page-about .era-note__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--brown);
}

/* ---------- 内容生产 ---------- */
.page-about .producer-section {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .pipeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .pipeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .pipeline__time {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--summer);
  white-space: nowrap;
}

.page-about .pipeline__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  color: var(--ink);
}

.page-about .pipeline__text {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

@media (min-width: 768px) {
  .page-about .pipeline__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: 26px 0;
  }
  .page-about .pipeline__time {
    padding-top: 4px;
    text-align: left;
  }
}

.page-about .producer-foot {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .producer-foot a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--spring);
  padding-bottom: 1px;
}

.page-about .producer-foot a:hover {
  border-bottom-color: var(--ink);
}

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

.page-about .team-grid {
  display: grid;
  gap: clamp(30px, 5vw, 64px);
}

.page-about .team-copy .eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .team-copy__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.7rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .team-copy__text {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .team-chart {
  padding: clamp(20px, 3vw, 30px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .team-chart__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .team-chart__total {
  font-family: var(--font-num);
  font-size: clamp(2rem, 4.4vw, 2.8rem);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .team-chart__unit {
  font-size: 13px;
  color: var(--stone);
}

.page-about .team-row {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 12px;
  padding: 10px 0 4px;
}

.page-about .team-row__label {
  font-size: 13px;
  color: var(--ink);
}

.page-about .team-row__track {
  display: block;
  height: 9px;
  background: color-mix(in srgb, var(--silver) 45%, transparent);
  border-radius: 1px;
  overflow: hidden;
}

.page-about .team-row__bar {
  display: block;
  height: 100%;
  border-radius: 1px;
}

.page-about .team-row__bar--spring { width: 27.6%; background: var(--spring); }
.page-about .team-row__bar--autumn { width: 34.5%; background: var(--autumn); }
.page-about .team-row__bar--winter { width: 20.7%; background: var(--winter); }
.page-about .team-row__bar--moss { width: 17.2%; background: var(--moss); }

.page-about .team-row__val {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 600;
  text-align: right;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .team-row__desc {
  margin: 0 0 8px;
  padding-left: 78px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

@media (min-width: 960px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .team-chart {
    margin-top: 8px;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .eco-section {
  background: var(--ink);
  color: var(--paper-2);
}

.page-about .eco-section .eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--spring);
}

.page-about .eco-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .eco-copy__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.4vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--paper-2);
  text-wrap: balance;
}

.page-about .eco-copy__text {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: color-mix(in srgb, var(--paper-2) 84%, transparent);
}

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

.page-about .eco-figure .media {
  border: 1px solid color-mix(in srgb, var(--paper-2) 22%, transparent);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-about .eco-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: color-mix(in srgb, var(--paper-2) 66%, transparent);
}

@media (min-width: 900px) {
  .page-about .eco-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.75fr);
    gap: clamp(40px, 6vw, 80px);
  }
}

.page-about .eco-rail-wrap {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .eco-rail__hint {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .06em;
  color: color-mix(in srgb, var(--paper-2) 58%, transparent);
}

.page-about .eco-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .eco-card {
  flex: 0 0 82%;
  max-width: 320px;
  scroll-snap-align: start;
  padding: 20px 18px;
  background: var(--paper-2);
  color: var(--text);
  border-radius: var(--radius);
  border-top: 3px solid var(--spring);
}

.page-about .eco-card--spring { border-top-color: var(--spring); }
.page-about .eco-card--summer { border-top-color: var(--summer); }
.page-about .eco-card--autumn { border-top-color: var(--autumn); }
.page-about .eco-card--winter { border-top-color: var(--winter); }

.page-about .eco-card__tag {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .eco-card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .eco-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

@media (min-width: 720px) {
  .page-about .eco-card {
    flex: 0 0 300px;
  }
}

/* ---------- 会员服务演进 ---------- */
.page-about .member-section {
  background: var(--paper);
}

.page-about .member-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .member-copy .eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .member-copy__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.16;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .member-copy__text {
  margin: 0 0 14px;
  max-width: 42em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .member-copy__text a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--summer);
  padding-bottom: 1px;
}

.page-about .member-copy__text a:hover {
  border-bottom-color: var(--ink);
}

.page-about .member-side {
  padding: clamp(20px, 3vw, 28px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--electric);
  border-radius: var(--radius);
}

.page-about .member-side__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
}

.page-about .member-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .member-side__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .member-side__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--spring);
  border-radius: 1px;
}

@media (min-width: 960px) {
  .page-about .member-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
  }
  .page-about .member-side {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }
}

/* ---------- 荣誉 ---------- */
.page-about .honor-section {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
}

.page-about .honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .honor-item {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .honor-item__year {
  font-family: var(--font-num);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--autumn);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.page-about .honor-item__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.3vw, 1.3rem);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .honor-item__text {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

@media (min-width: 820px) {
  .page-about .honor-item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 24px;
    padding: 26px 0;
  }
  .page-about .honor-item__year {
    padding-top: 2px;
  }
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  background: var(--paper);
}

.page-about .about-cta__card {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 44px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2.2rem);
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 880px) {
  .page-about .about-cta__card {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(28px, 4vw, 56px);
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 无障碍与动效降级 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--electric);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}
<<<END>>>