.page-about {
  background: var(--paper);
  color: var(--black);
  overflow-x: clip;
}

.page-about .about-rail {
  display: none;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 3.6vw, 34px) clamp(28px, 4.5vw, 48px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: 0.01em;
  font-weight: 900;
  color: var(--ink);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.78;
  color: rgba(26, 26, 26, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__panel {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3.2vw, 30px);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -66px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, rgba(47, 122, 62, 0.58), rgba(242, 140, 40, 0.18) 62%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--lemon);
}

.page-about .about-stats {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-stat {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--on-ink-line);
}

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

.page-about .about-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1;
  font-weight: 600;
  color: var(--lemon);
}

.page-about .about-stat__label {
  font-size: 14px;
  line-height: 1.55;
  color: var(--on-ink);
}

.page-about .about-hero__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(247, 244, 234, 0.6);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  margin-top: clamp(8px, 1.6vw, 14px);
  padding-block: 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(14, 34, 58, 0.55);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

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

.page-about .about-index .index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--white);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-index .index-link:hover,
.page-about .about-index .index-link:focus-visible {
  border-color: var(--grass);
  background: rgba(47, 122, 62, 0.08);
  transform: translateX(2px);
}

.page-about .about-index .index-link .index-link__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grass);
  letter-spacing: 0.06em;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-block: clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-about .about-section__head {
  display: grid;
  gap: 10px;
}

.page-about .section-number {
  font-family: var(--font-mono);
  font-size: clamp(44px, 11vw, 100px);
  line-height: 0.82;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  opacity: 0.18;
}

.page-about .about-section__title {
  margin: 0;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--ink);
  max-width: 20em;
}

.page-about .about-section__lede {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(26, 26, 26, 0.78);
}

.page-about .about-section__body {
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3.2vw, 32px);
  align-items: start;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(26, 26, 26, 0.86);
}

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

/* ---------- 图片 ---------- */
.page-about .about-photo {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow-card);
}

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

.page-about .about-photo figcaption {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(14, 34, 58, 0.66);
}

.page-about .about-photo--wide {
  margin-top: clamp(24px, 4vw, 38px);
}

/* ---------- 主张四卡 ---------- */
.page-about .about-beliefs {
  margin-top: clamp(24px, 4vw, 36px);
  display: grid;
  gap: 14px;
}

.page-about .about-belief {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-belief:hover,
.page-about .about-belief:focus-within {
  border-color: var(--grass);
  transform: translateY(-2px);
}

.page-about .about-belief__title {
  margin: 12px 0 8px;
  font-size: 20px;
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-belief__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(26, 26, 26, 0.78);
}

/* ---------- 时间轴 ---------- */
.page-about .about-section--teal {
  background: var(--teal);
  color: var(--paper);
  border-bottom-color: rgba(247, 244, 234, 0.14);
}

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

.page-about .about-section--teal .about-section__lede {
  color: rgba(247, 244, 234, 0.78);
}

.page-about .about-section--teal .section-number--lemon {
  color: var(--lemon);
  opacity: 0.55;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(var(--lemon), var(--dusk) 45%, rgba(247, 244, 234, 0.32));
  opacity: 0.6;
}

.page-about .about-timeline__node {
  position: relative;
  margin: 0;
  padding: 14px 16px 14px 34px;
  border: 1px solid rgba(247, 244, 234, 0.18);
  border-radius: var(--r-md);
  background: rgba(247, 244, 234, 0.06);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lemon);
  box-shadow: 0 0 0 4px rgba(245, 230, 99, 0.16);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-within {
  border-color: var(--lemon);
  background: rgba(247, 244, 234, 0.11);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--lemon);
}

.page-about .about-timeline__title {
  margin: 6px 0 6px;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-timeline__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 244, 234, 0.76);
}

.page-about .about-section--teal .about-photo {
  border-color: rgba(247, 244, 234, 0.2);
  background: rgba(247, 244, 234, 0.08);
}

.page-about .about-section--teal .about-photo figcaption {
  color: rgba(247, 244, 234, 0.72);
}

/* ---------- 团队错位卡 ---------- */
.page-about .about-team {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  gap: 14px;
}

.page-about .about-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--grass);
  border-radius: var(--r-md);
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition: border-left-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  border-left-color: var(--dusk);
  transform: translateY(-3px);
}

.page-about .about-card__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--indigo);
}

.page-about .about-card__title {
  margin: 8px 0 8px;
  font-size: 19px;
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(26, 26, 26, 0.78);
}

/* ---------- 范围与入口 ---------- */
.page-about .about-section--ink {
  background: var(--ink);
  color: var(--paper);
  border-bottom-color: rgba(247, 244, 234, 0.14);
}

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

.page-about .about-section--ink .about-section__lede {
  color: var(--on-ink);
}

.page-about .about-section--ink .section-number {
  color: var(--lemon);
  opacity: 0.5;
}

.page-about .about-scope {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  gap: clamp(22px, 3.6vw, 34px);
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-figure {
  padding: 14px 16px;
  border-radius: var(--r-sm);
  background: rgba(247, 244, 234, 0.08);
  border: 1px solid var(--on-ink-line);
}

.page-about .about-figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.1;
  font-weight: 600;
  color: var(--lemon);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--on-ink);
}

.page-about .about-entries {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-entries__item {
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--on-ink-line);
  background: rgba(14, 34, 58, 0.45);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-entries__item:hover,
.page-about .about-entries__item:focus-within {
  border-color: var(--grass);
  background: rgba(47, 122, 62, 0.16);
}

.page-about .about-entries__link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-entries__link:hover,
.page-about .about-entries__link:focus-visible {
  border-bottom-color: var(--lemon);
}

.page-about .about-entries__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dusk);
}

.page-about .about-entries__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-ink);
}

/* ---------- 收束区与回顶 ---------- */
.page-about .about-cta {
  margin-top: clamp(26px, 4.4vw, 44px);
  display: grid;
  gap: 18px;
  padding: clamp(22px, 3.6vw, 34px);
  border-radius: var(--r-xl);
  background: var(--grass);
  color: var(--white);
  box-shadow: var(--shadow-pop);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.24;
  font-weight: 900;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
}

.page-about .about-cta__link {
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  border-bottom-color: var(--lemon);
  color: var(--lemon);
}

.page-about .about-top {
  margin-top: clamp(20px, 3vw, 30px);
  display: flex;
  justify-content: flex-end;
}

.page-about .about-top__btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 9px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-top__btn:hover,
.page-about .about-top__btn:focus-visible {
  border-color: var(--grass);
  background: rgba(47, 122, 62, 0.1);
}

.page-about .about-top__btn:active {
  transform: translateY(1px);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-beliefs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-section__head {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: start;
    gap: clamp(16px, 2.4vw, 28px);
  }

  .page-about .about-section__head > .section-number {
    text-align: right;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(24px, 3.6vw, 44px);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

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

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline {
    gap: 18px;
  }

  .page-about .about-timeline__node {
    width: calc(50% - 26px);
    padding: 16px 20px;
  }

  .page-about .about-timeline__node::before {
    display: none;
  }

  .page-about .about-timeline__node:nth-child(odd) {
    margin-right: auto;
    border-right: 4px solid rgba(245, 230, 99, 0.55);
  }

  .page-about .about-timeline__node:nth-child(even) {
    margin-left: auto;
    border-left: 4px solid rgba(242, 140, 40, 0.6);
    transform: translateY(14px);
  }

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

  .page-about .about-team .about-card:nth-child(even) {
    transform: translateY(16px);
  }

  .page-about .about-team .about-card:nth-child(even):hover,
  .page-about .about-team .about-card:nth-child(even):focus-within {
    transform: translateY(12px);
  }

  .page-about .about-scope {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(26px, 4vw, 48px);
  }

  .page-about .about-figures {
    grid-template-columns: 1fr;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1440px) {
  .page-about .about-rail {
    display: block;
    position: fixed;
    left: 26px;
    top: 46%;
    z-index: 2;
    margin: 0;
    padding: 18px 7px;
    writing-mode: vertical-rl;
    letter-spacing: 0.42em;
    font-size: 13px;
    font-weight: 700;
    color: var(--ink);
    background: rgba(14, 34, 58, 0.06);
    border: 1px solid var(--line);
    border-radius: var(--r-pill);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index .index-link,
  .page-about .about-belief,
  .page-about .about-card,
  .page-about .about-timeline__node,
  .page-about .about-entries__item,
  .page-about .about-cta__link,
  .page-about .about-top__btn {
    transition: none;
  }

  .page-about .about-index .index-link:hover,
  .page-about .about-belief:hover,
  .page-about .about-card:hover,
  .page-about .about-top__btn:active {
    transform: none;
  }
}
<<<END>>>