.page-about {
  --about-anchor: 7rem;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  padding-block: 1.15rem 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--patina);
}

.page-about .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--crimson);
  border-bottom-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 0.6rem;
  padding-block: clamp(2.6rem, 6vw, 4.6rem) clamp(2rem, 4vw, 3rem);
  background:
    repeating-linear-gradient(90deg, rgba(200, 162, 74, 0.16) 0 1px, transparent 1px 42px),
    radial-gradient(120% 100% at 8% 0%, rgba(122, 31, 43, 0.68), transparent 62%),
    linear-gradient(158deg, var(--ink-blue) 0%, var(--ink-blue-2) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--crimson), var(--gold) 45%, transparent 85%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3.2rem);
  align-items: start;
}

.page-about .about-hero__eyebrow {
  color: var(--gold-light);
  letter-spacing: 0.28em;
}

.page-about .about-hero__title {
  margin: 0.85rem 0 1.15rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: #fff;
}

.page-about .about-hero__lede {
  max-width: 40rem;
  margin: 0;
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  color: rgba(245, 239, 228, 0.84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-gold);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.85);
}

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

.page-about .about-hero__figure .media-frame__caption {
  color: rgba(245, 239, 228, 0.62);
}

/* ---------- 坐标条 ---------- */
.page-about .about-coords {
  display: grid;
  gap: 1px;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(200, 162, 74, 0.26);
  border: 1px solid rgba(200, 162, 74, 0.26);
}

.page-about .about-coords__item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.05rem 1.15rem 1.2rem;
  background: rgba(15, 27, 43, 0.92);
}

.page-about .about-coords__key {
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-light);
}

.page-about .about-coords__val {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.4vw, 1.22rem);
  letter-spacing: 0.08em;
  color: #fff;
}

.page-about .about-coords__note {
  font-size: 0.78rem;
  line-height: 1.65;
  color: rgba(245, 239, 228, 0.62);
}

/* ---------- 通用章节头 ---------- */
.page-about .section-head {
  max-width: 46rem;
}

.page-about .section-title {
  margin: 0.5rem 0 0.9rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.28;
  color: var(--crimson-deep);
}

.page-about .lede {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .rule {
  display: block;
  width: 84px;
  height: 2px;
  margin-top: 1.5rem;
  background: linear-gradient(90deg, var(--gold), transparent);
}

/* ---------- 发展时间线 ---------- */
.page-about .about-timeline {
  padding-block: clamp(3rem, 7vw, 5.4rem);
  background: var(--paper);
}

.page-about .about-timeline__banner {
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 2px solid var(--gold);
  background: var(--ink-blue);
}

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

.page-about .about-timeline__banner .media-frame__caption {
  padding: 0.7rem 0.2rem 0;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-tl {
  display: grid;
  gap: 2rem;
}

.page-about .about-tl__index {
  border-left: 1px solid rgba(140, 106, 63, 0.42);
  padding-left: 1rem;
}

.page-about .about-tl__index-title {
  margin: 0 0 0.9rem;
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--patina);
}

.page-about .about-tl__index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl__index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--mist);
  text-decoration: none;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-tl__index-link span {
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--crimson);
}

.page-about .about-tl__index-link:hover,
.page-about .about-tl__index-link:focus-visible {
  color: var(--crimson-deep);
  border-bottom-color: var(--gold);
}

.page-about .about-tl__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.5rem;
  list-style: none;
  border-left: 1px solid rgba(200, 162, 74, 0.5);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 1.9rem 0.4rem;
  scroll-margin-top: var(--about-anchor);
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -1.94rem;
  top: 0.42rem;
  width: 0.68rem;
  height: 0.68rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, 0.16);
  transition: background 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-about .about-tl__item:target::before {
  background: var(--celadon);
  box-shadow: 0 0 0 6px rgba(99, 183, 163, 0.22);
}

.page-about .about-tl__item:target {
  background: linear-gradient(90deg, rgba(232, 205, 138, 0.26), transparent 78%);
  border-radius: 4px;
}

.page-about .about-tl__year {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  letter-spacing: 0.14em;
  color: var(--crimson);
}

.page-about .about-tl__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-tl__body {
  margin: 0;
  max-width: 40rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-crew-section {
  padding-block: clamp(3rem, 7vw, 5.2rem);
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
  border-top: 1px solid rgba(140, 106, 63, 0.24);
  border-bottom: 1px solid rgba(140, 106, 63, 0.24);
}

.page-about .about-crew-section__head {
  max-width: 46rem;
}

.page-about .about-crew {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-crew__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
}

.page-about .about-crew__tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  font-family: var(--font-body);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--ink-blue-2);
  background: transparent;
  border: 1px solid rgba(28, 48, 73, 0.28);
  border-radius: 2px;
  cursor: pointer;
  transition: background 220ms var(--ease), color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-crew__tab:hover,
.page-about .about-crew__tab:focus-visible {
  border-color: var(--gold);
  color: var(--crimson);
}

.page-about .about-crew__tab[aria-selected="true"] {
  background: var(--crimson);
  border-color: var(--crimson);
  color: var(--paper);
}

.page-about .about-crew__count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  padding: 0.06rem 0.34rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  opacity: 0.85;
}

.page-about .about-crew__panel {
  position: relative;
  padding: clamp(1.3rem, 3vw, 1.9rem);
  background: rgba(15, 27, 43, 0.94);
  color: var(--paper);
  border-left: 3px solid var(--celadon);
  box-shadow: 0 20px 46px -32px rgba(15, 27, 43, 0.9);
}

.page-about .about-crew__panel-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.14rem;
  letter-spacing: 0.03em;
  color: #fff;
}

.page-about .about-crew__panel-body {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(245, 239, 228, 0.82);
}

.page-about .about-crew__points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-crew__points li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(245, 239, 228, 0.7);
}

.page-about .about-crew__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.42rem;
  height: 0.42rem;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-crew__figure {
  margin: 0;
  align-self: start;
}

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

.page-about .about-crew__figure .media-frame__caption {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 治理流程 ---------- */
.page-about .about-flow {
  padding-block: clamp(3rem, 7vw, 5.4rem);
  background: var(--paper);
}

.page-about .about-flow__list {
  display: grid;
  gap: 1px;
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(140, 106, 63, 0.3);
  border: 1px solid rgba(140, 106, 63, 0.3);
}

.page-about .about-flow__step {
  position: relative;
  padding: 1.35rem 1.2rem 1.5rem;
  background: var(--paper-2);
  transition: background 240ms var(--ease);
}

.page-about .about-flow__step:hover {
  background: #fff;
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-flow__name {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.04rem;
  color: var(--crimson-deep);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 资质 ---------- */
.page-about .about-proof {
  padding-block: clamp(3rem, 7vw, 5.2rem);
  background: linear-gradient(160deg, var(--ink-blue) 0%, var(--ink-blue-2) 100%);
  color: var(--paper);
}

.page-about .about-proof .section-title {
  color: #fff;
}

.page-about .about-proof .lede {
  color: rgba(245, 239, 228, 0.72);
}

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

.page-about .about-proof__grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.8rem, 4vw, 2.4rem);
}

.page-about .about-proof__card {
  background: rgba(245, 239, 228, 0.06);
  border: 1px solid rgba(200, 162, 74, 0.32);
  backdrop-filter: blur(6px);
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-about .about-proof__card[open],
.page-about .about-proof__card:hover {
  border-color: var(--gold);
  background: rgba(245, 239, 228, 0.1);
}

.page-about .about-proof__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.15rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-proof__summary:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 3px;
}

.page-about .about-proof__badge {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  padding: 0.24rem 0.5rem;
  color: var(--ink-blue);
  background: var(--gold-light);
  border-radius: 2px;
}

.page-about .about-proof__name {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: #fff;
}

.page-about .about-proof__detail {
  margin: 0;
  padding: 0 1.15rem 1.2rem;
  font-size: 0.86rem;
  line-height: 1.8;
  color: rgba(245, 239, 228, 0.74);
  border-top: 1px solid rgba(200, 162, 74, 0.24);
  padding-top: 0.9rem;
}

/* ---------- 行业矩阵 ---------- */
.page-about .about-industry {
  padding-block: clamp(3rem, 7vw, 5.2rem);
  background: var(--paper);
}

.page-about .about-industry__grid {
  display: grid;
  gap: 1px;
  margin: clamp(1.8rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(140, 106, 63, 0.28);
  border: 1px solid rgba(140, 106, 63, 0.28);
}

.page-about .about-industry__cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.1rem 1.3rem;
  background: var(--paper);
  transition: background 220ms var(--ease);
}

.page-about .about-industry__cell:hover,
.page-about .about-industry__cell:focus-within {
  background: #fff;
}

.page-about .about-industry__name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  color: var(--crimson);
}

.page-about .about-industry__scene {
  font-size: 0.82rem;
  line-height: 1.72;
  color: var(--mist);
  transition: color 220ms var(--ease);
}

.page-about .about-industry__cell:hover .about-industry__scene {
  color: var(--ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(2.6rem, 6vw, 4.2rem);
  background:
    repeating-linear-gradient(90deg, rgba(232, 205, 138, 0.14) 0 1px, transparent 1px 36px),
    linear-gradient(140deg, var(--crimson) 0%, var(--crimson-deep) 100%);
  color: var(--paper);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.6rem;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.32;
  color: #fff;
}

.page-about .about-cta__body {
  margin: 0;
  max-width: 40rem;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(245, 239, 228, 0.82);
}

.page-about .about-cta__body a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 205, 138, 0.55);
}

.page-about .about-cta__body a:hover,
.page-about .about-cta__body a:focus-visible {
  color: #fff;
  border-bottom-color: #fff;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-cta__links .btn--primary {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--crimson-deep);
}

.page-about .about-cta__links .btn--primary:hover,
.page-about .about-cta__links .btn--primary:focus-visible {
  background: var(--gold-light);
  border-color: var(--gold-light);
}

.page-about .about-cta__links .btn--ghost {
  border-color: rgba(245, 239, 228, 0.6);
  color: var(--paper);
}

.page-about .about-cta__links .btn--ghost:hover,
.page-about .about-cta__links .btn--ghost:focus-visible {
  border-color: var(--gold-light);
  color: var(--gold-light);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-coords {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-about .about-tl {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-about .about-tl__index {
    position: sticky;
    top: var(--about-anchor);
    align-self: start;
  }

  .page-about .about-tl__index-list {
    flex-direction: column;
    gap: 0.7rem;
  }

  .page-about .about-crew {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

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

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

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

@media (min-width: 1120px) {
  .page-about .about-industry__grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}