.page-about {
  --about-lift: clamp(20px, 4vw, 44px);
  background: var(--paper);
  color: var(--rock);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: clamp(14px, 3vw, 22px);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--clay);
}

.page-about .breadcrumb a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  border-color: var(--clay);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--rock);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(14px, 3vw, 24px);
  padding: clamp(30px, 6vw, 72px) 0 clamp(38px, 7vw, 92px);
  background: var(--indigo);
  color: var(--cream);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
  overflow: hidden;
}

.page-about .about-hero__glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(520px 300px at 82% 18%, rgba(242, 140, 40, .26), transparent 70%),
    radial-gradient(420px 260px at 10% 90%, rgba(46, 139, 122, .22), transparent 72%),
    repeating-linear-gradient(90deg, rgba(246, 241, 231, .05) 0 2px, transparent 2px 26px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .eyebrow--light {
  color: var(--orange);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(2.1rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  line-height: 1.85;
  color: rgba(246, 241, 231, .88);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 4vw, 32px);
}

.page-about .about-hero__media {
  margin: 0;
  aspect-ratio: 4 / 3;
  background: var(--indigo-l);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.page-about .media-frame__caption {
  padding: 10px 12px;
  background: var(--cream);
  border-top: var(--line) solid var(--ink);
  color: var(--rock);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding: clamp(46px, 8vw, 96px) 0;
}

.page-about .section-head {
  display: grid;
  gap: 12px;
  max-width: 66ch;
  margin-bottom: clamp(24px, 5vw, 48px);
}

.page-about .section-head h2 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.7rem);
  line-height: 1.15;
  font-weight: 900;
  color: var(--indigo);
}

.page-about .section-head p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
}

.page-about a {
  color: var(--clay);
}

.page-about a:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 我们解决的问题 ---------- */
.page-about .about-problem__list {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-problem__row {
  display: grid;
  background: var(--cream);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
}

.page-about .about-problem__cell {
  padding: clamp(16px, 3vw, 24px);
}

.page-about .about-problem__cell--fix {
  background: rgba(46, 139, 122, .09);
  border-top: var(--line) solid var(--ink);
}

.page-about .about-problem__cell p {
  margin: 12px 0 0;
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-problem__foot {
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding-left: 16px;
  border-left: 4px solid var(--moss);
  font-size: .98rem;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- 服务版图 ---------- */
.page-about .about-map {
  background: var(--cream);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-map__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: none;
}

.page-about .about-map__tablist [role="tab"] {
  flex: 1 1 140px;
  padding: 12px 14px;
  background: var(--paper);
  border: var(--line) solid var(--ink);
  color: var(--indigo);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  text-align: left;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.page-about .about-map__tablist [role="tab"]:hover {
  background: var(--indigo-l);
  color: var(--cream);
}

.page-about .about-map__tablist [role="tab"][aria-selected="true"] {
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.page-about .about-map__panel {
  margin-top: clamp(16px, 3vw, 26px);
  padding: clamp(20px, 4vw, 34px);
  background: var(--paper);
  border: var(--line) solid var(--ink);
  border-left: 8px solid var(--clay);
}

.page-about .about-map__panel h3 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  line-height: 1.3;
  color: var(--indigo);
}

.page-about .about-map__panel p {
  margin: 14px 0 0;
  max-width: 70ch;
  line-height: 1.85;
}

.page-about .about-map__facts {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-map__facts li {
  padding: 10px 0 10px 14px;
  border-left: 3px solid var(--moss);
  font-size: .97rem;
  line-height: 1.7;
}

.page-about .about-num {
  font-family: var(--mono);
  font-size: 1.15em;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: .02em;
}

.page-about .about-map__link {
  margin: 20px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .about-map__link a {
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-timeline__anchors a {
  padding: 8px 14px;
  background: var(--indigo);
  color: var(--cream);
  border: var(--line) solid var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-about .about-timeline__anchors a:hover,
.page-about .about-timeline__anchors a:focus-visible {
  background: var(--orange);
  color: var(--ink);
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 4px;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 15px;
  width: 3px;
  background: linear-gradient(180deg, var(--rock), var(--moss));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px) 46px;
}

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

.page-about .node-mark {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  background: var(--cream);
  border: var(--line) solid var(--ink);
  border-radius: 50%;
  transition: background .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-timeline__item.is-lit .node-mark {
  background: var(--orange);
  transform: scale(1.12);
}

.page-about .about-timeline__body {
  padding: clamp(16px, 3vw, 24px);
  background: var(--paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
}

.page-about .about-timeline__body h3 {
  margin: 12px 0 0;
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  color: var(--indigo);
}

.page-about .about-timeline__body p {
  margin: 10px 0 0;
  max-width: 68ch;
  line-height: 1.82;
}

.page-about .about-timeline__figure {
  margin: clamp(30px, 6vw, 52px) 0 0;
  aspect-ratio: 7 / 3;
  background: var(--indigo);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

/* ---------- 团队与更新机制 ---------- */
.page-about .about-team {
  background: var(--cream);
  border-top: var(--line) solid var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  align-items: start;
}

.page-about .about-team__text h2 {
  margin: 12px 0 0;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 900;
  color: var(--indigo);
}

.page-about .about-team__text > p {
  margin: 16px 0 0;
  max-width: 70ch;
  line-height: 1.85;
}

.page-about .about-team__stats {
  display: grid;
  gap: 12px;
  margin: clamp(20px, 4vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__stats li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--paper);
  border: var(--line) solid var(--ink);
  border-left: 8px solid var(--moss);
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-stat__role {
  font-weight: 700;
  color: var(--indigo);
}

.page-about .about-stat__note {
  font-size: .92rem;
  line-height: 1.7;
  color: var(--rock);
}

.page-about .about-team__note {
  margin: 18px 0 0;
  padding: 12px 14px;
  background: rgba(20, 33, 61, .06);
  border-left: 4px solid var(--indigo);
  font-size: .95rem;
  line-height: 1.8;
}

.page-about .about-team__media {
  margin: 0;
  aspect-ratio: 4 / 3;
  background: var(--paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.page-about .about-eco {
  margin-top: clamp(30px, 6vw, 54px);
}

.page-about .about-eco__list {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--indigo);
  color: var(--cream);
  border: var(--line) solid var(--ink);
  font-size: .98rem;
  line-height: 1.7;
}

.page-about .about-eco__list .about-num {
  color: var(--orange);
  font-size: 1.5rem;
}

/* ---------- 为什么选择 ---------- */
.page-about .about-why__grid {
  display: grid;
  gap: clamp(14px, 2.6vw, 22px);
}

.page-about .about-why__card {
  position: relative;
  padding: clamp(20px, 3.4vw, 28px);
  background: var(--paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-why__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow);
}

.page-about .about-why__index {
  display: inline-block;
  padding: 3px 8px;
  background: var(--indigo);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-about .about-why__card h3 {
  margin: 14px 0 0;
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
  color: var(--indigo);
}

.page-about .about-why__card p {
  margin: 10px 0 0;
  line-height: 1.8;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(38px, 7vw, 76px) 0;
  background: var(--indigo);
  color: var(--cream);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 4vw, 36px);
  align-items: center;
}

.page-about .about-cta h2 {
  margin: 12px 0 0;
  font-size: clamp(1.4rem, 3.6vw, 2.2rem);
  line-height: 1.2;
  font-weight: 900;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 56ch;
  line-height: 1.85;
  color: rgba(246, 241, 231, .85);
}

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

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

@media (min-width: 700px) {
  .page-about .about-problem__row {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-problem__cell--fix {
    border-top: none;
    border-left: var(--line) solid var(--ink);
  }

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

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.1fr .9fr;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1.2fr .8fr;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-why__card,
  .page-about .node-mark,
  .page-about .about-map__tablist [role="tab"],
  .page-about .about-timeline__anchors a {
    transition: none;
  }

  .page-about .about-why__card:hover {
    transform: none;
  }

  .page-about .about-timeline__item.is-lit .node-mark {
    transform: none;
  }
}