.page-about {
  background: var(--c-cream);
  color: var(--c-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(28px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(180deg, rgba(7, 28, 46, 0.05), rgba(7, 28, 46, 0) 62%),
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 96px);
  background-repeat: no-repeat, repeat;
  background-size: 100% 100%, auto 100%;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-deep-900);
  max-width: 16ch;
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: #22303c;
  max-width: 64ch;
}

.page-about .about-ticks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-ticks__item {
  background: var(--c-cream);
  padding: 14px 16px 16px;
}

.page-about .about-ticks__num {
  display: block;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--c-deep-700);
  border-bottom: 2px solid var(--c-gold);
  padding-bottom: 5px;
}

.page-about .about-ticks__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

/* ---------- 通用区块微调 ---------- */
.page-about .about-journey .section-head,
.page-about .about-team .section-head,
.page-about .about-eco .section-head,
.page-about .about-flow .section-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-journey__media {
  margin: 0 0 clamp(20px, 3.5vw, 34px);
}

.page-about .axis {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .axis-line {
  stroke: var(--line);
}

.page-about .axis-node {
  fill: var(--c-cream);
  stroke: var(--c-deep-500);
}

.page-about .axis-node--start {
  stroke: var(--c-clay);
}

.page-about .axis-node--gold {
  stroke: var(--c-gold);
}

.page-about .axis text {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  fill: var(--c-stone);
}

.page-about .tl {
  display: grid;
  gap: 0;
  margin-top: clamp(20px, 3.5vw, 40px);
}

.page-about .tl__rail {
  display: none;
}

.page-about .tl__rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

.page-about .tl__rail-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .tl__rail-list a {
  display: block;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-deep-700);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

.page-about .tl__rail-list a:hover,
.page-about .tl__rail-list a:focus-visible {
  border-left-color: var(--c-gold);
  background: rgba(201, 162, 39, 0.08);
  color: var(--c-deep-900);
}

.page-about .tl-node {
  position: relative;
  padding: 20px 0 26px 22px;
  border-left: 1px solid var(--line);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--c-gold);
  background: var(--c-cream);
}

.page-about .tl-node--current::before {
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.16);
}

.page-about .tl-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-clay);
}

.page-about .tl-node h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 25px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-deep-900);
}

.page-about .tl-node p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: #22303c;
}

.page-about .tl-node .plate {
  display: inline-block;
  margin-top: 12px;
}

/* ---------- 规模 ---------- */
.page-about .about-scale .prose p {
  margin: 0;
}

.page-about .about-scale__stats {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scale__stats .stats__item {
  background: var(--c-kraft);
  padding: 18px 18px 20px;
}

.page-about .about-scale__stats .stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1;
  color: var(--c-deep-900);
}

.page-about .about-scale__unit {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-clay);
}

.page-about .about-scale__stats .stats__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #2b3a45;
  max-width: 30ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__intro {
  align-items: start;
}

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

.page-about .about-team__text .prose p {
  margin: 0 0 16px;
}

.page-about .line-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .line-list__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: #22303c;
}

.page-about .about-team__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-stone);
  max-width: 60ch;
}

.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-card {
  background: var(--c-cream);
  padding: 18px 18px 20px;
  border-top: 3px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  background: #fffdf8;
  border-top-color: var(--c-gold);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--c-deep-700);
}

.page-about .team-card__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-deep-900);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: #2b3a45;
}

/* ---------- 资质 ---------- */
.page-about .about-credential .prose p {
  margin: 0 0 14px;
}

.page-about .credential-plates {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .credential-plate {
  background: var(--c-cream);
  padding: 18px 16px 20px;
}

.page-about .credential-plate--wide {
  grid-column: 1 / -1;
  border-top: 3px solid var(--c-gold);
}

.page-about .credential-plate__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1;
  color: var(--c-deep-900);
}

.page-about .credential-plate__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

/* ---------- 生态渠道（深色区） ---------- */
.page-about .about-eco {
  background: var(--c-deep-900);
  color: var(--c-cream);
}

.page-about .about-eco .eyebrow {
  color: var(--c-gold-soft);
}

.page-about .about-eco h2 {
  color: var(--c-cream);
}

.page-about .about-eco .section-head__lead {
  color: rgba(244, 241, 234, 0.74);
}

.page-about .about-eco__head {
  border-bottom-color: var(--line-light);
}

.page-about .about-eco__media {
  margin: 0 0 clamp(20px, 3.5vw, 32px);
}

.page-about .about-eco .media__frame {
  border-color: var(--line-light);
}

.page-about .about-eco .media__caption {
  color: rgba(244, 241, 234, 0.6);
}

.page-about .regions {
  display: grid;
  gap: 14px;
}

.page-about .region {
  position: relative;
  padding: 18px 16px 20px;
  border: 1px solid var(--line-light);
  background-color: rgba(244, 241, 234, 0.03);
  background-image: radial-gradient(rgba(244, 241, 234, 0.22) 1px, transparent 1px);
  background-size: 12px 12px;
  background-position: right 12px bottom 12px;
  background-repeat: repeat;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .region:hover,
.page-about .region:focus-within {
  border-color: var(--c-gold);
  background-color: rgba(201, 162, 39, 0.08);
}

.page-about .region__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-gold-soft);
}

.page-about .region__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.8);
  max-width: 34ch;
}

.page-about .about-eco__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--c-coral);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.78);
  max-width: 68ch;
}

/* ---------- 流程 ---------- */
.page-about .flow {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow__step {
  position: relative;
  background: var(--c-cream);
  padding: 18px 16px 20px;
  border-top: 3px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-about .flow__step:hover {
  background: #fffdf8;
  border-top-color: var(--c-coral);
}

.page-about .flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-coral);
}

.page-about .flow__step h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--c-deep-900);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: #2b3a45;
}

.page-about .about-flow__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 栏目对照 ---------- */
.page-about .about-columns .prose p {
  margin: 0;
}

.page-about .colmap {
  margin-top: clamp(22px, 3.5vw, 34px);
  border-top: 1px solid var(--line);
}

.page-about .colmap__row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .colmap__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-deep-900);
}

.page-about .colmap__desc {
  font-size: 14px;
  line-height: 1.75;
  color: #2b3a45;
}

.page-about .colmap__link {
  width: fit-content;
  font-size: 14px;
  color: var(--c-deep-500);
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold);
  padding-bottom: 2px;
  transition: color 160ms ease;
}

.page-about .colmap__link:hover,
.page-about .colmap__link:focus-visible {
  color: var(--c-deep-900);
}

.page-about .colmap__row--current {
  background: rgba(201, 162, 39, 0.09);
  padding-left: 12px;
  padding-right: 12px;
}

.page-about .colmap__now {
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-clay);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-ticks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-hero h1 {
    margin-top: 18px;
  }

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

  .page-about .tl {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

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

  .page-about .tl__rail-inner {
    position: sticky;
    top: calc(var(--header-upper-h) + var(--header-main-h) + 22px);
  }

  .page-about .tl-node {
    padding: 24px 0 34px 28px;
  }

  .page-about .tl-node::before {
    top: 30px;
  }

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

  .page-about .about-scale__stats .stats__item {
    padding: 22px 20px 26px;
  }

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .page-about .colmap__row {
    grid-template-columns: 180px minmax(0, 1fr) 140px;
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 1040px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-card {
    padding: 22px 20px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .region,
  .page-about .flow__step,
  .page-about .tl__rail-list a {
    transition: none;
  }
}