.page-about {
  --about-rail: 240px;
  position: relative;
  display: block;
  background: var(--ink-900);
  color: var(--text-body);
  overflow-x: clip;
}

.page-about [id] {
  scroll-margin-top: 92px;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-about .breadcrumbs {
  margin-bottom: clamp(22px, 3.5vw, 36px);
}

.page-about .breadcrumbs__link,
.page-about .breadcrumbs__current {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumbs__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(22px, 3.4vw, 38px) clamp(44px, 6.5vw, 88px);
  background:
    radial-gradient(90% 68% at 92% -6%, rgba(240, 74, 29, 0.24), transparent 62%),
    linear-gradient(168deg, var(--ink-850) 0%, var(--ink-900) 70%);
  border-bottom: 1px solid var(--line);
  overflow: clip;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: auto -14% -46% 46%;
  height: 82%;
  background: linear-gradient(150deg, var(--ink-800), transparent 78%);
  border-top: 1px solid var(--line-soft);
  transform: rotate(-6deg);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(14px, 2.2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 6.2vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--text-strong);
  text-wrap: balance;
}

.page-about .about-hero__accent {
  color: var(--pulse);
}

.page-about .about-hero .lede {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--text-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  min-width: 0;
  background: var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  box-shadow: var(--shadow-panel);
  transition: transform 500ms var(--ease);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(0.76) contrast(1.06) brightness(0.85);
  transition: transform 800ms var(--ease);
}

.page-about .about-hero__media:hover img {
  transform: scale(1.035);
}

.page-about .about-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: rgba(16, 18, 20, 0.78);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.page-about .about-hero__facts {
  display: grid;
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 16px;
  background: var(--ink-850);
}

.page-about .about-hero__fact b {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .about-hero__fact span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  padding-block: clamp(38px, 6vw, 84px);
}

.page-about .about-index {
  min-width: 0;
  padding-top: 14px;
  border-top: 2px solid var(--pulse);
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--text-body);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--pulse);
  color: var(--text-strong);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--pulse);
}

.page-about .about-index__years {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-index__years-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__year {
  display: inline-block;
  padding: 4px 0 4px 10px;
  border-left: 1px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-index__year:hover,
.page-about .about-index__year:focus-visible {
  color: var(--signal);
  border-left-color: var(--signal);
}

/* ---------- 正文叙述 ---------- */
.page-about .about-narrative {
  min-width: 0;
}

.page-about .about-section {
  padding-block: clamp(28px, 4.4vw, 52px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-section__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--pulse);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.1vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--text-strong);
  text-wrap: balance;
}

.page-about .about-prose {
  max-width: 68ch;
}

.page-about .about-prose--spaced {
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-prose p {
  margin: 0 0 15px;
  font-size: 16px;
  line-height: 1.88;
  color: var(--text-body);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-quote {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--pulse);
  background: linear-gradient(90deg, rgba(240, 74, 29, 0.13), rgba(240, 74, 29, 0));
  color: var(--paper);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  align-items: start;
}

.page-about .about-figure {
  margin: 0;
  min-width: 0;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-figure--band {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.88) contrast(1.06);
  transition: transform 800ms var(--ease);
}

.page-about .about-figure:hover img {
  transform: scale(1.03);
}

.page-about .about-figure figcaption {
  padding: 9px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* ---------- 团队三条线 ---------- */
.page-about .team-list {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  padding: 16px 16px 18px;
  background: var(--ink-850);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--moss);
  box-shadow: 0 1px 0 rgba(244, 239, 228, 0.04) inset;
}

.page-about .team-card:nth-child(2) {
  border-top-color: var(--clay);
}

.page-about .team-card:nth-child(3) {
  border-top-color: var(--signal);
}

.page-about .team-card__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.page-about .team-card__name {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-strong);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-item {
  position: relative;
  padding-left: clamp(18px, 2.6vw, 28px);
  padding-bottom: clamp(18px, 2.6vw, 28px);
  border-left: 1px solid var(--line);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 11px;
  width: 9px;
  height: 9px;
  background: var(--clay);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(185, 100, 69, 0.16);
}

.page-about .tl-year {
  display: inline-block;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-about .tl-item__panel {
  padding: 15px 17px;
  background: linear-gradient(135deg, rgba(244, 239, 228, 0.055), rgba(244, 239, 228, 0.012));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .tl-item__title {
  margin: 0 0 7px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.015em;
  color: var(--text-strong);
}

.page-about .tl-item__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 规模数据 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stat {
  padding: 18px 16px 20px;
  background: var(--ink-850);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-stat__num em {
  margin-left: 5px;
  font-style: normal;
  font-size: 0.52em;
  color: var(--signal);
  letter-spacing: 0;
}

.page-about .about-stat__lab {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(30px, 4.5vw, 52px);
  padding: clamp(22px, 3.6vw, 38px);
  background:
    linear-gradient(115deg, rgba(240, 74, 29, 0.2), rgba(16, 18, 20, 0) 60%),
    var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  line-height: 1.25;
  color: var(--text-strong);
}

.page-about .about-cta__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: clamp(34px, 5vw, 68px);
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 76px);
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 9px 0 9px 14px;
    white-space: normal;
    transition: border-color 200ms var(--ease), color 200ms var(--ease);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--pulse);
  }

  .page-about .about-index__years-list {
    flex-direction: column;
    gap: 2px;
  }

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

@media (min-width: 1000px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(24px, 3.4vw, 40px);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__media,
  .page-about .about-hero__media img,
  .page-about .about-figure img {
    transition: none;
  }

  .page-about .about-hero__media:hover img,
  .page-about .about-figure:hover img {
    transform: none;
  }
}