.page-about {
  --ab-line: rgba(201, 162, 74, .38);
  --ab-hair: rgba(20, 18, 14, .1);
  background: var(--porcelain);
  color: var(--ink-black);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about a {
  color: inherit;
}

/* ---------- 通用节奏 ---------- */
.page-about .ab-sec {
  padding: 52px 0;
  position: relative;
}

@media (min-width: 900px) {
  .page-about .ab-sec {
    padding: 86px 0;
  }
}

.page-about .ab-sec--hero {
  padding-top: 26px;
  padding-bottom: 46px;
  background: var(--porcelain);
}

.page-about .ab-sec--mist {
  background: var(--mist);
}

.page-about .ab-sec--hard {
  background: var(--ink-green);
  color: var(--porcelain);
}

.page-about .ab-sec--deep {
  background: var(--ink-deep);
  color: var(--porcelain);
}

/* ---------- 区块标题 ---------- */
.page-about .ab-sec-head {
  max-width: 72ch;
}

.page-about .ab-sec-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink-green);
}

.page-about .ab-sec-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--gold);
  flex: none;
}

.page-about .ab-sec-kicker--gold {
  color: var(--gold-soft);
}

.page-about .ab-sec-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-about .ab-sec-note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .ab-sec-head--dark .ab-sec-title {
  color: var(--porcelain);
}

.page-about .ab-sec-head--dark .ab-sec-note {
  color: rgba(247, 244, 236, .78);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumbs {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero-grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 940px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    gap: 56px;
    align-items: center;
  }
}

.page-about .ab-kicker {
  display: inline-block;
  margin: 0;
  padding: 8px 15px;
  background: var(--ink-green);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  clip-path: var(--clip-btn);
}

.page-about .ab-hero-copy h1 {
  margin: 22px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 5.8vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink-green);
}

.page-about .ab-lead {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-black);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 0;
}

.page-about .ab-hero-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--felt);
  clip-path: var(--clip-cut);
}

.page-about .ab-hero-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 6px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold) 46%, transparent 46%);
  opacity: .9;
}

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

@media (min-width: 940px) {
  .page-about .ab-hero-figure {
    transform: translateY(22px);
  }
}

/* ---------- 规模数据 ---------- */
.page-about .ab-scale-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.page-about .ab-scale-card {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--porcelain);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  border-top: 3px solid transparent;
  border-image: none;
  box-shadow: 0 18px 40px -34px rgba(8, 32, 25, .6);
}

.page-about .ab-scale-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 3px;
  background: var(--gold);
}

.page-about .ab-scale-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 46px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--ink-green);
}

.page-about .ab-scale-unit {
  margin-left: 4px;
  font-size: 16px;
  letter-spacing: .06em;
  color: var(--gray);
}

.page-about .ab-scale-label {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--ink-black);
}

.page-about .ab-scale-text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

@media (min-width: 760px) {
  .page-about .ab-scale-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-scale-card--a {
    grid-column: span 7;
  }

  .page-about .ab-scale-card--b {
    grid-column: span 5;
  }

  .page-about .ab-scale-card--c {
    grid-column: span 5;
  }

  .page-about .ab-scale-card--d {
    grid-column: span 7;
  }
}

/* ---------- 发展历程 ---------- */
.page-about .ab-tl-head {
  display: grid;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .ab-tl-head {
    grid-template-columns: minmax(0, .38fr) minmax(0, .62fr);
    gap: 44px;
    align-items: end;
    padding-left: 32px;
  }
}

.page-about .ab-tl-figure {
  margin: 0;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--felt);
  clip-path: var(--clip-cut);
  max-width: 420px;
}

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

.page-about .ab-tl-wrap {
  margin-top: 38px;
}

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

.page-about .ab-tl-row {
  position: relative;
  padding: 26px 0 26px 32px;
}

.page-about .ab-tl-row::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--ab-line);
}

.page-about .ab-tl-row:first-child::before {
  top: 34px;
}

.page-about .ab-tl-row:last-child::before {
  bottom: auto;
  height: 36px;
}

.page-about .ab-tl-row::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 33px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--porcelain);
}

.page-about .ab-tl-row[data-state="current"]::after {
  background: var(--cinnabar);
  box-shadow: 0 0 0 4px var(--porcelain), 0 0 0 8px rgba(178, 55, 44, .16);
}

.page-about .ab-tl-year {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
}

.page-about .ab-tl-num {
  font-size: clamp(26px, 5.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--ink-green);
}

.page-about .ab-tl-stage {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
}

.page-about .ab-tl-body {
  margin-top: 14px;
}

.page-about .ab-tl-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink-black);
}

.page-about .ab-tl-text {
  margin: 8px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

@media (min-width: 900px) {
  .page-about .ab-tl-row {
    display: grid;
    grid-template-columns: minmax(0, .38fr) minmax(0, .62fr);
    gap: 44px;
    padding: 30px 0 30px 32px;
  }

  .page-about .ab-tl-body {
    margin-top: 2px;
  }

  .page-about .ab-tl-text {
    max-width: 58ch;
  }
}

/* ---------- 团队角色 ---------- */
.page-about .ab-team-banner {
  margin: 32px 0 0;
  aspect-ratio: 12 / 5;
  overflow: hidden;
  background: var(--felt);
  clip-path: var(--clip-cut);
}

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

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

.page-about .ab-roles-tabs {
  margin-bottom: 24px;
}

.page-about .ab-roles-tabs .segment-btn {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .ab-role-panel {
  padding: 26px 22px 28px;
  background: var(--porcelain);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  border-left: 3px solid var(--gold);
}

@media (min-width: 760px) {
  .page-about .ab-role-panel {
    padding: 32px 34px 34px;
  }
}

.page-about .ab-role-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cinnabar);
}

.page-about .ab-role-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 3vw, 24px);
  line-height: 1.4;
  color: var(--ink-green);
}

.page-about .ab-role-text {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-black);
}

.page-about .ab-role-metric {
  display: inline-block;
  margin: 20px 0 0;
  padding: 8px 14px;
  background: var(--gold-soft);
  color: var(--ink-black);
  font-size: 13px;
  letter-spacing: .02em;
}

.page-about .ab-role-metric .mono {
  font-weight: 700;
  color: var(--ink-green);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.page-about .ab-eco-card {
  position: relative;
  padding: 26px 22px 28px;
  background: rgba(247, 244, 236, .06);
  border: 1px solid rgba(201, 162, 74, .34);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .ab-eco-index {
  margin: 0;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .ab-eco-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.45;
  color: var(--porcelain);
}

.page-about .ab-eco-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 244, 236, .8);
}

.page-about .ab-eco-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 34px 0 0;
}

@media (min-width: 800px) {
  .page-about .ab-eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-eco-card:nth-child(2) {
    transform: translateY(-14px);
  }
}

/* ---------- 长期原则 ---------- */
.page-about .ab-principles {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  counter-reset: none;
}

.page-about .ab-principle {
  padding: 24px 22px 26px;
  background: var(--mist);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .ab-principle-num {
  margin: 0;
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .ab-principle-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.45;
  color: var(--ink-green);
}

.page-about .ab-principle-text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-black);
}

@media (min-width: 880px) {
  .page-about .ab-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-principle:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .ab-principle:nth-child(3) {
    margin-top: 52px;
  }
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  display: grid;
  gap: 24px;
  align-items: center;
}

@media (min-width: 860px) {
  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }
}

.page-about .ab-cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.32;
  color: var(--porcelain);
}

.page-about .ab-cta-text {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(247, 244, 236, .78);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about .ab-scale-card,
  .page-about .ab-tl-row,
  .page-about .ab-principle,
  .page-about .ab-eco-card {
    transition: transform .24s var(--ease), box-shadow .24s var(--ease);
  }
}

.page-about .ab-scale-card:hover,
.page-about .ab-eco-card:hover {
  transform: translateY(-3px);
}

.page-about .ab-principle:hover {
  transform: translateY(-3px);
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 759px) {
  .page-about .ab-scale-num {
    font-size: 34px;
  }

  .page-about .ab-tl-row {
    padding-left: 26px;
  }

  .page-about .ab-tl-row::before {
    left: 5px;
  }

  .page-about .ab-tl-row::after {
    left: 0;
  }

  .page-about .ab-tl-figure {
    max-width: 100%;
  }

  .page-about .ab-team-banner {
    aspect-ratio: 16 / 10;
  }

  .page-about .ab-hero-figure {
    aspect-ratio: 3 / 2;
  }
}