.page-about {
  --about-gap: clamp(20px, 3vw, 36px);
  --about-tl-year: 74px;
}

.page-about .crumbs {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(16px, 3vw, 28px) var(--gutter) 0;
}

.page-about h2 {
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 14px;
}

.page-about h3 {
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(8px, 2vw, 20px);
}

.page-about .about-intro__title {
  font-size: clamp(32px, 7vw, 56px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 14px 0 22px;
  max-width: 20ch;
}

.page-about .about-intro__lead {
  font-size: clamp(17px, 1.5vw, 19px);
  color: var(--paper);
}

.page-about .about-intro__note {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-intro__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 197, 0.45);
}

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

/* ---------- 关键数字带 ---------- */
.page-about .about-figures__title {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  margin-bottom: var(--about-gap);
}

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

.page-about .about-figures__item {
  background: var(--ink);
  padding: clamp(18px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(46px, 11vw, 118px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--cyan);
}

.page-about .about-figures__num--amber {
  color: var(--amber);
}

.page-about .about-figures__label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  max-width: 22ch;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  color: var(--ink);
}

.page-about .about-team__lead {
  color: var(--graphite);
}

.page-about .about-team__layout {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--mist);
  border: 1px solid var(--mist);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 6px minmax(0, 1fr);
  background: var(--paper);
}

.page-about .about-team__bar {
  display: block;
}

.page-about .about-team__row--advisory .about-team__bar { background: var(--cyan-deep); }
.page-about .about-team__row--data .about-team__bar { background: var(--cyan); }
.page-about .about-team__row--region .about-team__bar { background: var(--amber); }
.page-about .about-team__row--product .about-team__bar { background: var(--ink); }
.page-about .about-team__row--service .about-team__bar { background: var(--mist); }

.page-about .about-team__main {
  padding: 16px 18px;
  min-width: 0;
}

.page-about .about-team__name {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.page-about .about-team__count {
  font-size: 20px;
  color: var(--cyan-deep);
}

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

/* ---------- 图片 ---------- */
.page-about .about-shot {
  margin: 0;
  border: 1px solid var(--grid);
  background: var(--ink-deep);
}

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

.page-about .about-shot__cap {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--grid);
}

.page-about .about-team__shot,
.page-about .about-creds__shot {
  border-color: var(--mist);
  background: var(--paper);
}

.page-about .about-team__shot .about-shot__cap,
.page-about .about-creds__shot .about-shot__cap {
  color: var(--graphite);
  border-top-color: var(--mist);
}

/* ---------- 交付周期 ---------- */
.page-about .about-cycles__list {
  display: grid;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-cycle {
  border: 1px solid var(--grid);
  background: rgba(30, 51, 70, 0.34);
}

.page-about .about-cycle__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-cycle__range {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 5.4vw, 36px);
  line-height: 1;
  color: var(--paper);
}

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

.page-about .about-cycle__state {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border: 1px solid currentColor;
}

.page-about .about-cycle__state--stock { color: var(--cyan); }
.page-about .about-cycle__state--prep { color: var(--amber); }
.page-about .about-cycle__state--custom { color: var(--mist); }

.page-about .about-cycle__mark {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mist);
  transition: transform var(--fast) var(--ease), color var(--fast) var(--ease);
}

.page-about .about-cycle[open] .about-cycle__mark {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .about-cycle__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--grid);
}

.page-about .about-cycle__body p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 46ch;
}

.page-about .about-cycle__foot {
  margin: var(--about-gap) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 44ch;
}

/* ---------- 发展历程 ---------- */
.page-about .about-history__shot {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border-color: var(--mist);
  background: var(--paper);
}

.page-about .about-history__shot .about-shot__cap {
  color: var(--graphite);
  border-top-color: var(--mist);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--mist);
}

.page-about .about-timeline__row {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-tl-year) minmax(0, 1fr);
  gap: 10px;
  padding-bottom: clamp(24px, 4vw, 42px);
}

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

.page-about .about-timeline__row::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--cyan-deep);
  border-radius: 50%;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-timeline__year:hover,
.page-about .about-timeline__year:focus-visible {
  border-bottom-color: var(--cyan-deep);
}

.page-about .about-timeline__body {
  min-width: 0;
  padding-left: 2px;
  transition: box-shadow var(--fast) var(--ease);
}

.page-about .about-timeline__body:target {
  box-shadow: inset 3px 0 0 var(--cyan-deep);
  padding-left: 14px;
}

.page-about .about-timeline__title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink);
}

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

.page-about .about-history__note {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--mist);
  color: var(--graphite);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-creds__layout {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-creds {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-creds__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .about-creds__no {
  font-size: 14px;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .about-creds__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 6px;
}

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

/* ---------- 三件事 ---------- */
.page-about .about-pledge-section {
  color: var(--ink);
}

.page-about .about-pledge {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--mist);
  border: 1px solid var(--mist);
}

.page-about .about-pledge__item {
  background: var(--paper);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-pledge__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber-deep);
  margin-bottom: 14px;
}

.page-about .about-pledge__title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* ---------- 结尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
  border-top: 1px solid var(--grid);
  padding-top: clamp(24px, 4vw, 40px);
}

.page-about .about-cta__text {
  color: var(--mist);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-figures__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about {
    --about-tl-year: 92px;
  }

  .page-about .about-timeline__row {
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-creds__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

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

  .page-about .about-cta__text {
    max-width: 52ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cycle__mark,
  .page-about .about-timeline__body {
    transition: none;
  }
}