.page-about {
  --about-line: rgba(20, 33, 61, 0.2);
  --about-axis: 54px;
  background: var(--cream);
  color: var(--graphite);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(28px, 4vw, 48px) 0 clamp(56px, 7vw, 96px);
  border-bottom: 2px solid var(--ink-navy);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 40px;
}

.page-about .about-hero__copy .display-1 {
  margin: 10px 0 22px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-hero__panel {
  position: relative;
  background: linear-gradient(158deg, var(--ink-navy) 0%, var(--navy-soft) 100%);
  color: var(--cream);
  border: 2px solid var(--ink-navy);
  box-shadow: 8px 8px 0 var(--warm-gold);
  padding: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__panel-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber-light);
  margin: 0 0 18px;
}

.page-about .about-hero__panel-big {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-size: clamp(3rem, 9vw, 4.8rem);
  font-weight: 800;
  line-height: 0.95;
  color: var(--warm-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__unit {
  font-size: clamp(1rem, 2.4vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-about .about-hero__panel-cap {
  margin: 12px 0 22px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 246, 236, 0.78);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(244, 225, 187, 0.28);
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(251, 246, 236, 0.9);
}

.page-about .about-hero__stats .num {
  color: var(--warm-gold);
  font-weight: 800;
  margin-right: 6px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 通用段落头 ---------- */
.page-about .section {
  padding: clamp(64px, 8vw, 104px) 0 0;
}

.page-about .about-head {
  max-width: 720px;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.page-about .about-head .display-2 {
  margin: 8px 0 16px;
}

.page-about .side-note {
  margin: clamp(36px, 5vw, 60px) 0 0;
  color: rgba(20, 33, 61, 0.42);
  letter-spacing: 0.3em;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--about-axis) - 1px);
  top: 12px;
  bottom: 56px;
  width: 2px;
  background: var(--about-line);
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 36px 18px minmax(0, 1fr);
  column-gap: 10px;
  padding-bottom: 44px;
  outline: none;
}

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

.page-about .timeline__year {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.14em;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-navy);
  justify-self: center;
  padding-top: 2px;
  white-space: nowrap;
}

.page-about .timeline__axis {
  position: relative;
  display: flex;
  justify-content: center;
}

.page-about .timeline__dot {
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--warm-gold);
  border: 2px solid var(--ink-navy);
  transition: transform 180ms var(--ease), background 180ms var(--ease);
}

.page-about .timeline__item:hover .timeline__dot,
.page-about .timeline__item:focus .timeline__dot {
  transform: scale(1.25);
}

.page-about .timeline__item:last-child .timeline__dot {
  background: var(--vermilion);
}

.page-about .timeline__body {
  background: var(--paper);
  border: 2px solid var(--ink-navy);
  box-shadow: 5px 5px 0 rgba(12, 23, 48, 0.24);
  padding: 20px 22px 22px;
  max-width: 100%;
  outline: none;
}

.page-about .timeline__item:focus .timeline__body {
  box-shadow: 5px 5px 0 var(--warm-gold);
}

.page-about .timeline__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

.page-about .timeline__title {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  line-height: 1.4;
  color: var(--ink-navy);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .timeline__extra {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
  color: var(--navy-soft);
  border-left: 2px solid var(--warm-gold);
  padding-left: 0;
  transition: max-height 280ms var(--ease), opacity 280ms var(--ease),
    margin-top 280ms var(--ease), padding-left 280ms var(--ease);
}

.page-about .timeline__item:hover .timeline__extra,
.page-about .timeline__item:focus .timeline__extra,
.page-about .timeline__item:focus-within .timeline__extra {
  max-height: 160px;
  opacity: 1;
  margin-top: 12px;
  padding-left: 12px;
}

.page-about .timeline__figure {
  margin: 18px 0 0;
}

.page-about .timeline__item:last-child .timeline__body {
  background: var(--ink-navy);
  color: var(--cream);
}

.page-about .timeline__item:last-child .timeline__title,
.page-about .timeline__item:last-child .timeline__kicker {
  color: var(--warm-gold);
}

.page-about .timeline__item:last-child .timeline__extra {
  color: rgba(251, 246, 236, 0.82);
}

.page-about .timeline__item:last-child .timeline__text {
  color: rgba(251, 246, 236, 0.92);
}

/* ---------- 家庭画像 ---------- */
.page-about .fam-grid {
  display: grid;
  gap: 30px;
}

.page-about .fam-card {
  position: relative;
  border: 2px solid var(--ink-navy);
  background: var(--cream);
  padding: 24px 22px 26px;
}

.page-about .fam-card--a {
  box-shadow: 6px 6px 0 var(--navy-deep);
}

.page-about .fam-card--b {
  background: var(--amber-light);
  box-shadow: -6px 6px 0 var(--navy-deep);
}

.page-about .fam-card--c {
  box-shadow: 6px 6px 0 var(--navy-deep);
}

.page-about .fam-card:focus-within {
  outline: 2px solid var(--warm-gold);
  outline-offset: 3px;
}

.page-about .fam-card__idx {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--gold-deep);
}

.page-about .fam-card__title {
  margin: 0 0 10px;
  font-size: clamp(1.08rem, 2.3vw, 1.28rem);
  line-height: 1.4;
  color: var(--ink-navy);
}

.page-about .fam-card__who {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .fam-card__need {
  margin: 0 0 14px;
  padding: 12px 14px;
  background: rgba(20, 33, 61, 0.06);
  border-left: 3px solid var(--warm-gold);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-navy);
}

.page-about .fam-card__how {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(51, 48, 43, 0.86);
}

.page-about .about-coverage {
  margin: clamp(38px, 5vw, 60px) 0 0;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .team-copy .display-2 {
  margin: 8px 0 16px;
}

.page-about .team-split {
  margin-top: 32px;
  display: grid;
  gap: 22px;
}

.page-about .team-split__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  border: 2px solid var(--ink-navy);
  background: var(--paper);
  padding: 18px 20px;
  box-shadow: 5px 5px 0 rgba(12, 23, 48, 0.2);
}

.page-about .team-split__row:nth-child(2) {
  box-shadow: -5px 5px 0 rgba(12, 23, 48, 0.2);
}

.page-about .team-split__num {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 3rem);
  font-weight: 800;
  line-height: 1;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .team-split__num--alt {
  color: var(--jade);
}

.page-about .team-split__text h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--ink-navy);
}

.page-about .team-split__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .team-copy__foot {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.8;
  padding-top: 20px;
  border-top: 2px solid var(--hairline);
}

.page-about .team-media {
  margin: 0;
}

/* ---------- 更新节拍 ---------- */
.page-about .cadence {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink-navy);
}

.page-about .cadence__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .cadence__cycle {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--vermilion);
}

.page-about .cadence__name {
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  font-weight: 700;
  color: var(--ink-navy);
}

.page-about .cadence__meta {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(51, 48, 43, 0.82);
}

.page-about .cat-row {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .cat-row__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(20, 33, 61, 0.54);
}

.page-about .cat-row__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 合作 ---------- */
.page-about .partners-grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .partners-lead .display-2 {
  margin: 8px 0 16px;
}

.page-about .partners-lead__link {
  margin: 24px 0 0;
}

.page-about .partners-side {
  display: grid;
  gap: 22px;
}

.page-about .partner-card {
  border: 2px solid var(--ink-navy);
  padding: 22px 22px 24px;
}

.page-about .partner-card--gold {
  background: var(--amber-light);
  box-shadow: 6px 6px 0 var(--navy-deep);
}

.page-about .partner-card--ink {
  background: var(--ink-navy);
  color: var(--cream);
  box-shadow: -6px 6px 0 var(--warm-gold);
}

.page-about .partner-card__num {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 800;
  line-height: 1;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .partner-card--ink .partner-card__num {
  color: var(--warm-gold);
}

.page-about .partner-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.5;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .partner-card--ink p {
  color: rgba(251, 246, 236, 0.82);
}

/* ---------- 三条坚持 ---------- */
.page-about .pledge-grid {
  display: grid;
  gap: 24px;
}

.page-about .pledge {
  border: 2px solid var(--ink-navy);
  background: var(--cream);
  padding: 26px 24px 28px;
  box-shadow: 6px 6px 0 rgba(12, 23, 48, 0.22);
}

.page-about .pledge:nth-child(2) {
  background: var(--paper);
  box-shadow: -6px 6px 0 rgba(12, 23, 48, 0.22);
}

.page-about .pledge h3 {
  margin: 14px 0 10px;
  font-size: 1.1rem;
  color: var(--ink-navy);
}

.page-about .pledge p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 页尾引导 ---------- */
.page-about .about-cta {
  margin-top: clamp(72px, 9vw, 116px);
  background: linear-gradient(150deg, var(--ink-navy) 0%, var(--navy-soft) 100%);
  border-top: 2px solid var(--ink-navy);
  padding: clamp(48px, 7vw, 84px) 0;
}

.page-about .about-cta__inner {
  max-width: 760px;
}

.page-about .about-cta__eyebrow {
  color: var(--warm-gold);
}

.page-about .about-cta .display-3 {
  color: var(--cream);
  margin: 10px 0 18px;
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 246, 236, 0.82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-cta .btn--ghost {
  color: var(--cream);
  border-color: var(--cream);
  background: transparent;
}

.page-about .about-cta__mail {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(244, 225, 187, 0.78);
  word-break: break-all;
}

/* ---------- 图片基础适配 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 断点 ---------- */
@media (max-width: 599px) {
  .page-about {
    --about-axis: 41px;
  }

  .page-about .timeline__item {
    grid-template-columns: 26px 14px minmax(0, 1fr);
    column-gap: 8px;
  }

  .page-about .timeline__year {
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .page-about .timeline__body {
    padding: 16px 16px 18px;
    box-shadow: 4px 4px 0 rgba(12, 23, 48, 0.24);
  }
}

@media (min-width: 720px) {
  .page-about .cadence__item {
    grid-template-columns: 140px minmax(0, 1.1fr) minmax(0, 1.5fr);
    align-items: baseline;
    gap: 24px;
  }

  .page-about .fam-grid {
    gap: 34px;
  }

  .page-about .pledge-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 56px;
  }

  .page-about .timeline__item:nth-child(1) .timeline__body {
    max-width: 480px;
  }

  .page-about .timeline__item:nth-child(2) .timeline__body {
    max-width: 620px;
  }

  .page-about .timeline__item:nth-child(3) .timeline__body {
    max-width: 760px;
  }

  .page-about .timeline__item:nth-child(4) .timeline__body {
    max-width: 100%;
  }

  .page-about .fam-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    gap: 30px 28px;
  }

  .page-about .fam-card--a {
    grid-column: 1 / span 5;
  }

  .page-about .fam-card--b {
    grid-column: 6 / span 7;
    margin-top: 30px;
  }

  .page-about .fam-card--c {
    grid-column: 5 / span 8;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .team-media {
    margin-top: 26px;
  }

  .page-about .partners-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
  }

  .page-about .partners-side {
    margin-top: 18px;
  }
}

@media (min-width: 1100px) {
  .page-about .timeline__item {
    column-gap: 16px;
  }

  .page-about .about-cadence-sec .about-head,
  .page-about .about-partners-sec .partners-lead {
    max-width: 760px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__dot,
  .page-about .timeline__extra {
    transition: opacity 200ms linear;
  }

  .page-about .timeline__item:hover .timeline__dot,
  .page-about .timeline__item:focus .timeline__dot {
    transform: none;
  }
}