.page-about {
  --rule-paper: rgba(12, 35, 24, 0.16);
  --grid-line: rgba(23, 64, 47, 0.7);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 40px) clamp(48px, 8vw, 96px);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(28px, 6vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 20px;
  max-width: 60ch;
}

.page-about .about-hero__grid .t-display {
  font-size: clamp(34px, 6.4vw, 72px);
  line-height: 1.1;
}

.page-about .about-hero__grid .lede {
  margin: 0;
  max-width: 46ch;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .about-hero__facts li {
  background: var(--ink-800);
  padding: 16px 18px;
  display: grid;
  gap: 6px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--moss);
  line-height: 1.5;
}

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

/* ---------- 沿革 ---------- */

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

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

.page-about .about-era__item {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-top: 1px solid var(--ink-700);
  transition: background-color var(--t-fast) var(--ease);
}

.page-about .about-era__item:last-child {
  border-bottom: 1px solid var(--ink-700);
}

.page-about .about-era__item:hover,
.page-about .about-era__item:focus-within {
  background: linear-gradient(90deg, rgba(61, 242, 192, 0.12), rgba(61, 242, 192, 0) 72%);
}

.page-about .about-era__marker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-era__year {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  transition: color var(--t-fast) var(--ease);
}

.page-about .about-era__stage {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--moss);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-era__item:hover .about-era__year,
.page-about .about-era__item:focus-within .about-era__year {
  color: var(--cyan);
}

.page-about .about-era__item:hover .about-era__stage,
.page-about .about-era__item:focus-within .about-era__stage {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-era__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-era__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--moss);
  max-width: 44ch;
}

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

@media (min-width: 640px) {
  .page-about .about-era__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
  .page-about .about-era__marker {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (min-width: 960px) {
  .page-about .about-era__layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: clamp(40px, 6vw, 80px);
    align-items: start;
  }
  .page-about .about-era__figure {
    position: sticky;
    top: calc(var(--hdr-min) + 24px);
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team__figure {
  margin: 0 0 clamp(28px, 5vw, 48px);
}

.page-about .about-team__card {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px 22px 26px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-m);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  outline: none;
}

.page-about .about-team__card:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan-soft);
}

.page-about .about-team__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-team__card .t-sub {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--white);
}

.page-about .about-team__size {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--moss);
}

.page-about .about-team__extra {
  margin-top: 6px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--ink-700);
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.05em;
  color: var(--white) !important;
  opacity: 0.72;
}

.page-about .about-team__flow {
  margin-top: clamp(30px, 5vw, 48px);
  padding-top: 24px;
  border-top: 1px solid var(--ink-700);
}

.page-about .about-team__flow-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--moss);
}

.page-about .about-team__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-team__steps li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border-left: 2px solid var(--cyan);
  background: var(--ink-800);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: 14.5px;
  color: var(--white);
}

.page-about .about-step__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

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

/* ---------- 栏目体系（纸色区） ---------- */

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

.page-about .about-columns__item {
  display: grid;
  gap: 6px;
  padding: 22px 0;
  border-top: 1px solid var(--rule-paper);
}

.page-about .about-columns__item:last-child {
  border-bottom: 1px solid var(--rule-paper);
}

.page-about .about-columns__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent-paper);
}

.page-about .about-columns__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: var(--on-paper);
}

.page-about .about-columns__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--on-paper-soft);
  max-width: 52ch;
}

@media (min-width: 760px) {
  .page-about .about-columns__item {
    grid-template-columns: 56px 200px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

/* ---------- 更新节奏 ---------- */

.page-about .about-cadence__rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-cadence__row {
  background: var(--ink-800);
  padding: 20px clamp(16px, 3vw, 26px);
  display: grid;
  gap: 8px;
}

.page-about .about-cadence__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-cadence__v {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--white);
  max-width: 62ch;
}

@media (min-width: 760px) {
  .page-about .about-cadence__row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-about .about-cadence__stats {
  margin-top: clamp(28px, 4vw, 40px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
}

.page-about .about-cadence__stat {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--moss);
}

.page-about .about-cadence__stat span {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 860px) {
  .page-about .about-cadence__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 区域服务 ---------- */

.page-about .about-geo__layout {
  display: grid;
  gap: 36px;
}

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

.page-about .about-geo__panel .lede {
  margin: 0 0 28px;
  max-width: 48ch;
}

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

.page-about .about-geo__node {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink-800);
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-about .about-geo__name {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--white);
}

.page-about .about-geo__name::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft);
  flex: none;
}

.page-about .about-geo__tip {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--moss);
  padding-left: 18px;
}

@media (min-width: 760px) {
  .page-about .about-geo__points {
    display: block;
    position: relative;
    height: 360px;
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-m);
    overflow: hidden;
    background-color: var(--ink-900);
    background-image:
      linear-gradient(var(--grid-line) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 56px 56px;
    background-position: -1px -1px;
  }

  .page-about .about-geo__node {
    position: absolute;
    left: var(--x);
    top: var(--y);
    transform: translate(-50%, -50%);
    width: max-content;
    max-width: 220px;
    padding: 0;
    background: transparent;
    border-left: 0;
    border-radius: 0;
  }

  .page-about .about-geo__tip {
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    margin-top: 8px;
    padding: 8px 10px;
    max-width: 200px;
    font-size: 12px;
    line-height: 1.6;
    color: var(--white);
    background: var(--ink-800);
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-s);
    transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
  }

  .page-about .about-geo__node:hover .about-geo__tip,
  .page-about .about-geo__node:focus-visible .about-geo__tip,
  .page-about .about-geo__node:focus-within .about-geo__tip {
    opacity: 1;
    transform: translateY(0);
  }

  .page-about .about-geo__node:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 6px;
    border-radius: var(--radius-s);
  }
}

.page-about .about-geo__node--hubei { --x: 66%; --y: 30%; }
.page-about .about-geo__node--sichuan { --x: 18%; --y: 30%; }
.page-about .about-geo__node--chongqing { --x: 34%; --y: 50%; }
.page-about .about-geo__node--yunnan { --x: 18%; --y: 74%; }
.page-about .about-geo__node--guizhou { --x: 46%; --y: 72%; }

@media (min-width: 1040px) {
  .page-about .about-geo__layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }
}

/* ---------- 合作与互引（纸色区） ---------- */

.page-about .about-collab__block {
  padding: 24px 0 4px;
  border-top: 2px solid var(--accent-paper);
}

.page-about .about-collab__tag {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--accent-paper);
}

.page-about .about-collab__block .t-sub {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--on-paper);
}

.page-about .about-collab__block p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--on-paper-soft);
  max-width: 46ch;
}

.page-about .about-collab__quote {
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: clamp(24px, 4vw, 36px) 0 0;
  border-top: 1px solid var(--rule-paper);
  display: grid;
  gap: 14px;
}

.page-about .about-collab__quote blockquote {
  margin: 0;
  position: relative;
  padding-left: clamp(28px, 5vw, 56px);
}

.page-about .about-collab__quote blockquote::before {
  content: "“";
  position: absolute;
  left: 0;
  top: -0.18em;
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 76px);
  line-height: 1;
  color: var(--accent-paper);
  opacity: 0.35;
}

.page-about .about-collab__quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.5;
  color: var(--on-paper);
  max-width: 30ch;
}

.page-about .about-collab__quote figcaption {
  padding-left: clamp(28px, 5vw, 56px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--on-paper-soft);
}

/* ---------- 结尾通道 ---------- */

.page-about .about-cta {
  padding-block: clamp(44px, 7vw, 80px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
  align-items: end;
}

.page-about .about-cta__inner h2 {
  margin: 0 0 12px;
}

.page-about .about-cta__inner p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--moss);
  max-width: 52ch;
}

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

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 通用收敛 ---------- */

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-era__item,
  .page-about .about-geo__tip {
    transition: none;
  }
  .page-about .about-team__card:hover,
  .page-about .about-team__card:focus-visible {
    transform: none;
  }
}