.page-about {
  background: var(--paper-050);
}

.page-about section[id] {
  scroll-margin-top: 110px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--paper-050);
  padding: 36px 0 0;
}

.page-about .breadcrumb {
  margin-bottom: 34px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-hero__lede .eyebrow {
  margin: 0;
}

.page-about .about-hero__lede h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 7.4vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--navy-900);
  margin: 14px 0 22px;
  max-width: 15ch;
}

.page-about .about-hero__text {
  margin: 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-700);
}

.page-about .about-hero__side {
  background: var(--white);
  border: 1px solid var(--line-200);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}

.page-about .about-hero__side-en {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-500);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-200);
}

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

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--brand-orange);
}

.page-about .about-hero__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted-500);
}

/* 页内索引 */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-200);
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-200);
  background: var(--white);
  color: var(--ink-700);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.page-about .about-index__item:hover,
.page-about .about-index__item[aria-current] {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: var(--paper-050);
}

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

.page-about .about-index__item[aria-current] .about-index__num {
  color: var(--brand-orange);
}

/* ---------- 通用区块头 ---------- */
.page-about .about-section__head {
  max-width: 760px;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(25px, 3.8vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--navy-900);
  margin: 14px 0 12px;
}

.page-about .about-lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-about .about-dark-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-500);
}

.page-about .about-dark-label span {
  color: var(--brand-orange);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  background: var(--white);
  padding: 56px 0;
  border-top: 1px solid var(--line-200);
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: 32px;
}

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

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 26px 0 26px 30px;
  border-top: 1px solid var(--line-200);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 41px;
  bottom: -1px;
  width: 1px;
  background: var(--line-200);
}

.page-about .timeline__item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 33px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand-orange);
}

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-orange);
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  line-height: 1.4;
  color: var(--navy-900);
  margin: 4px 0 10px;
}

.page-about .timeline__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink-700);
}

.page-about .timeline__en {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-500);
}

.page-about .timeline__aside {
  margin: 0;
  max-width: 340px;
}

.page-about .timeline__aside img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-200);
  box-shadow: inset 0 0 0 1px rgba(10, 27, 51, 0.04);
  object-fit: cover;
}

.page-about .timeline__aside figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-500);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--navy-900);
  padding: 56px 0;
}

.page-about .about-team .about-h2 {
  color: var(--white);
}

.page-about .about-team .about-lead {
  color: var(--paper-100);
}

.page-about .about-wide {
  margin: 32px 0 0;
}

.page-about .about-wide img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  filter: saturate(0.88);
}

.page-about .about-wide figcaption {
  max-width: 1320px;
  margin: 12px auto 0;
  padding: 0 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted-500);
}

.page-about .lanes {
  margin-top: 32px;
}

.page-about .lane {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 22px 0;
  border-top: 1px solid var(--navy-500);
  transition: background-color 200ms ease;
}

.page-about .lane__role {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  color: var(--white);
  margin: 0;
}

.page-about .lane__en {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-orange);
}

.page-about .lane__desc {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-100);
}

/* ---------- 常设栏目 ---------- */
.page-about .about-columns {
  padding: 56px 0;
}

.page-about .columns {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .column {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 14px;
  padding: 22px 0;
  border-top: 1px solid var(--line-200);
}

.page-about .column__idx {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--brand-orange);
  padding-top: 3px;
}

.page-about .column__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  color: var(--navy-900);
  margin: 0;
}

.page-about .column__en {
  margin: 2px 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-500);
}

.page-about .column__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
}

/* ---------- 双语流程 ---------- */
.page-about .about-proof {
  background: var(--white);
  border-top: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  padding: 56px 0;
}

.page-about .proof {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 34px;
}

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

.page-about .proof__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-200);
  filter: saturate(0.9);
  object-fit: cover;
}

.page-about .proof__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-500);
}

.page-about .proof__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: proof;
}

.page-about .proof__step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 0 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line-200);
}

.page-about .proof__step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .proof__n {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mint-700);
  padding-top: 3px;
}

.page-about .proof__t {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  color: var(--navy-900);
  margin: 0 0 6px;
}

.page-about .proof__d {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-eco {
  padding: 56px 0 64px;
}

.page-about .eco {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .eco__item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  align-items: start;
  gap: 0 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line-200);
}

.page-about .eco__num {
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--navy-700);
}

.page-about .eco__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
  padding-top: 4px;
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  margin-top: 40px;
  padding: 28px 22px;
  background: var(--navy-900);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 22px;
}

.page-about .about-cta__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-orange);
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(21px, 2.9vw, 30px);
  line-height: 1.32;
  color: var(--white);
  margin: 10px 0 0;
  max-width: 24ch;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding-top: 52px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
  }

  .page-about .columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: 34px 32px;
  }

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

@media (min-width: 900px) {
  .page-about .about-timeline {
    padding: 72px 0;
  }

  .page-about .about-team,
  .page-about .about-proof {
    padding: 72px 0;
  }

  .page-about .about-columns,
  .page-about .about-eco {
    padding: 72px 0;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 56px;
    align-items: start;
  }

  .page-about .timeline__item {
    grid-template-columns: 110px minmax(0, 1fr) 190px;
    gap: 0 32px;
    padding: 30px 0 30px 34px;
  }

  .page-about .timeline__item::before {
    top: 45px;
  }

  .page-about .timeline__item::after {
    top: 37px;
  }

  .page-about .timeline__num {
    padding-top: 4px;
  }

  .page-about .timeline__en {
    margin: 6px 0 0;
    text-align: right;
  }

  .page-about .timeline__aside {
    position: sticky;
    top: 120px;
    max-width: none;
  }

  .page-about .about-wide img {
    max-height: 480px;
  }

  .page-about .lane {
    grid-template-columns: 190px 210px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 28px;
    padding: 24px 18px;
  }

  .page-about .lane:hover {
    background: var(--navy-700);
  }

  .page-about .lane__desc {
    margin-top: 0;
  }

  .page-about .proof {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .eco__item {
    grid-template-columns: 96px minmax(0, 1fr);
    padding: 24px 0;
  }

  .page-about .eco__num {
    font-size: 48px;
  }

  .page-about .eco__text {
    font-size: 16px;
    max-width: 68ch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding-top: 64px;
  }

  .page-about .timeline__item {
    grid-template-columns: 130px minmax(0, 1fr) 210px;
  }
}
<<<END>>>