.page-about {
  --about-radius: 4px;
  --about-gap: 28px;
  --about-split-gap: 40px;
  padding-bottom: 72px;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumb {
  padding-top: 24px;
}

.page-about .about-hero {
  padding-top: 28px;
  padding-bottom: 8px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-hero__lead {
  margin-top: 20px;
  max-width: 38em;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  background: var(--ink);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__stats .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-hero__stats .stat__label {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ice);
}

/* ---------- 通用章节微调 ---------- */
.page-about .section {
  margin-top: 72px;
}

.page-about .section__title {
  max-width: 24ch;
}

/* ---------- 历程：左右分屏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-split-gap);
  margin-top: 32px;
}

.page-about .about-timeline {
  border-left: 2px solid var(--blue);
  padding-left: 18px;
}

.page-about .about-timeline__title {
  margin: 0 0 14px;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
}

.page-about .about-timeline__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--glass);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .about-timeline__link:hover,
.page-about .about-timeline__link:focus-visible {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.page-about .about-timeline__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-timeline__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
}

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

.page-about .about-scale {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-scale__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.page-about .about-scale__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 320px;
}

.page-about .about-narrative {
  border-top: 1px solid var(--line-strong);
}

.page-about .about-stage {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-stage__title {
  margin: 10px 0 12px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.84;
}

/* ---------- 图片 ---------- */
.page-about .about-figure--wide {
  aspect-ratio: 7 / 4;
  margin-top: 34px;
}

.page-about .about-figure--tall {
  aspect-ratio: 3 / 4;
}

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

.page-about .about-figure-work,
.page-about .about-figure-venue,
.page-about .about-figure-screen {
  border-radius: var(--about-radius);
  overflow: hidden;
}

/* ---------- 数据章节 ---------- */
.page-about .about-data {
  margin-top: 28px;
  row-gap: 30px;
}

.page-about .about-data__lead {
  margin: 0 0 18px;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .about-data__text {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .about-cadence {
  background: var(--teal);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: 22px 22px 10px;
  position: relative;
  overflow: hidden;
}

.page-about .about-cadence::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.page-about .about-cadence__title {
  margin: 0 0 14px;
}

.page-about .about-cadence__row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cadence__num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-cadence__unit {
  font-size: 0.5em;
  margin-left: 4px;
  color: var(--ice);
}

.page-about .about-cadence__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  opacity: 0.85;
}

/* ---------- 横向数字条 ---------- */
.page-about .about-bar {
  margin: 64px 0;
  background: linear-gradient(90deg, var(--teal) 0%, var(--ink-2) 70%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.page-about .about-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 6%;
  width: 30%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(10, 108, 255, 0.32));
  transform: skewX(-6deg);
  pointer-events: none;
}

.page-about .about-bar__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  padding-top: 34px;
  padding-bottom: 34px;
}

.page-about .about-bar__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-bar__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(42px, 8vw, 76px);
  line-height: 0.95;
  color: var(--cyan);
  letter-spacing: -0.03em;
}

.page-about .about-bar__cell:nth-child(2) .about-bar__num {
  color: var(--paper);
}

.page-about .about-bar__cell:nth-child(3) .about-bar__num {
  color: var(--blue);
}

.page-about .about-bar__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ice);
  max-width: 26em;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: 26px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 16px;
  padding: 20px 0 20px 14px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: border-color 200ms var(--ease);
}

.page-about .about-team__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  background: transparent;
  transition: background-color 200ms var(--ease);
}

.page-about .about-team__row:hover::before,
.page-about .about-team__row:focus-within::before {
  background: var(--blue);
}

.page-about .about-team__row:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-team__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-team__duty {
  grid-column: 1 / -1;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ice);
}

.page-about .about-team__detail {
  grid-column: 1 / -1;
  overflow: hidden;
  max-height: 240px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.82;
  transition: max-height 220ms var(--ease), opacity 220ms var(--ease), margin-top 220ms var(--ease);
  margin-top: 4px;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  margin-top: 28px;
  row-gap: 30px;
}

.page-about .about-coverage__text {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.85;
}

.page-about .about-coverage__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-coverage__stat {
  flex: 1 1 120px;
  background: var(--ink-2);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background-color 200ms var(--ease);
}

.page-about .about-coverage__stat:hover {
  background: var(--teal);
}

.page-about .about-coverage__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-coverage__statlabel {
  font-size: 13px;
  color: var(--ice);
  line-height: 1.5;
}

/* ---------- 伙伴 ---------- */
.page-about .about-partners {
  margin-top: 28px;
  row-gap: 30px;
}

.page-about .about-partners__text {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.85;
}

.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

.page-about .about-partners__link {
  text-decoration: none;
}

/* ---------- 准则 ---------- */
.page-about .about-principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-principle {
  background: var(--glass);
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: var(--about-radius);
  padding: 24px 22px;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-principle:hover {
  background: var(--glass-strong);
  border-left-color: var(--cyan);
}

.page-about .about-principle__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
  line-height: 1.3;
}

.page-about .about-principle__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.8;
}

/* ---------- 延伸链接 ---------- */
.page-about .about-next {
  margin-top: 72px;
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink);
  text-decoration: none;
  transition: background-color 200ms var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: var(--teal);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-link__index {
  color: var(--cyan);
}

.page-about .about-link__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-link__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-bar__cell {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 24px 26px;
  }

  .page-about .about-bar__cell:first-child {
    border-left: 0;
    padding-left: 0;
  }

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

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

  .page-about .about-team__row {
    grid-template-columns: minmax(150px, 1fr) 90px minmax(0, 2fr);
    align-items: baseline;
    padding-left: 18px;
  }

  .page-about .about-team__duty {
    grid-column: 3 / 4;
    text-align: right;
  }

  .page-about .about-team__detail {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }

  .page-about .about-team__row:hover .about-team__detail,
  .page-about .about-team__row:focus-within .about-team__detail {
    max-height: 240px;
    opacity: 0.82;
    margin-top: 8px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-split {
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-timeline {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }

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

  .page-about .about-data .about-data__body {
    padding-right: 24px;
  }
}

@media (min-width: 1240px) {
  .page-about {
    --about-split-gap: 64px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}
</invoke>