.page-about {
  --about-rail-w: 288px;
  --about-gap: clamp(20px, 3.4vw, 44px);
  background: var(--paper);
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-about .about-top {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .about-top .ax-crumbs {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--warm);
}

.page-about .about-top .ax-crumbs a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-top .ax-crumbs a:hover {
  border-bottom-color: var(--teal);
}

/* ---------- 首屏 ---------- */
.page-about .about-mast {
  padding: clamp(22px, 4vw, 40px) 0 clamp(34px, 6vw, 68px);
}

.page-about .about-mast__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-mast__grid > * {
  min-width: 0;
}

.page-about .ax-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0 0 14px;
}

.page-about .ax-h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  max-width: 18em;
}

.page-about .ax-lede {
  font-family: var(--sans);
  font-size: clamp(16px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink);
  margin: 0;
  max-width: 40em;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.page-about .about-fact {
  border-top: 1px solid var(--line-strong);
  padding-top: 10px;
  min-width: 0;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--warm);
}

/* ---------- 章节索引侧栏 ---------- */
.page-about .about-rail {
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 18px 18px 16px;
  background: linear-gradient(180deg, rgba(230, 220, 203, 0.62), rgba(244, 238, 226, 0.92));
  min-width: 0;
}

.page-about .about-rail__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--warm);
  margin: 0 0 10px;
}

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

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 15px;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-about .about-rail__n {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--warm);
  transition: color 0.2s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--teal);
  padding-left: 4px;
}

.page-about .about-rail__link:hover .about-rail__n,
.page-about .about-rail__link:focus-visible .about-rail__n {
  color: var(--red);
}

.page-about .about-rail__stat {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}

.page-about .about-rail__stat-num {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
  letter-spacing: -0.02em;
}

.page-about .about-rail__stat-text {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--warm);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-ch {
  padding-block: clamp(34px, 5.5vw, 68px);
  border-top: 1px solid var(--line);
}

.page-about .about-ch--last {
  padding-bottom: clamp(44px, 7vw, 88px);
}

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

.page-about .about-ch__grid > * {
  min-width: 0;
}

.page-about .about-ch__no {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--red);
  border-top: 1px solid var(--line-strong);
  padding-top: 6px;
  margin: 0;
}

.page-about .about-h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}

.page-about .about-h2--dark {
  color: var(--paper);
  max-width: 22em;
}

.page-about .about-h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.page-about .about-prose {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 60ch;
}

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

.page-about .about-prose--lead {
  color: var(--ink);
  max-width: 58ch;
  margin-bottom: 22px;
}

/* ---------- 双栏与图 ---------- */
.page-about .about-duo {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .about-duo > * {
  min-width: 0;
}

.page-about .about-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: var(--paper-2);
}

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

.page-about .about-media__cap {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--warm);
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
}

.page-about .about-media--tall img {
  aspect-ratio: 3 / 4;
}

/* ---------- 引文 ---------- */
.page-about .about-quote {
  margin: 22px 0 0;
  padding: 16px 18px;
  background: var(--paper-2);
  border-left: 3px solid var(--amber);
  border-radius: 0 14px 14px 0;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 4px 10px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.2s var(--ease);
}

.page-about .about-team__row:hover {
  background: rgba(230, 220, 203, 0.4);
}

.page-about .about-team__no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-about .about-team__role {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.page-about .about-team__count {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-team__desc {
  grid-column: 2 / -1;
  margin: 2px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--warm);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-wrap {
  display: grid;
  gap: clamp(22px, 3.2vw, 38px);
  align-items: start;
}

.page-about .about-tl-wrap > * {
  min-width: 0;
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 4px 0 0 26px;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--navy), var(--amber));
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--navy);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-tl__item:hover::before {
  background: var(--red);
  border-color: var(--red);
}

.page-about .about-tl__year {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--navy);
  color: var(--paper);
  margin-bottom: 10px;
  transition: background 0.2s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__year {
  background: var(--red);
}

.page-about .about-tl__note {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.7;
  color: var(--teal);
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  max-height: none;
  opacity: 1;
}

.page-about .about-more {
  margin: 22px 0 0;
}

.page-about .ax-link {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color 0.2s var(--ease);
}

.page-about .ax-link:hover {
  color: var(--red);
}

/* ---------- 认证 ---------- */
.page-about .about-certs {
  display: grid;
  gap: 16px;
  margin-bottom: 26px;
}

.page-about .about-cert {
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 20px 20px 18px;
  background: var(--paper);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .about-cert:hover,
.page-about .about-cert:focus-within {
  border-color: var(--amber);
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -24px rgba(18, 24, 31, 0.6);
}

.page-about .about-cert__badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--navy);
  background: var(--paper-2);
  border-radius: 999px;
  padding: 4px 12px;
  margin: 0 0 12px;
}

.page-about .about-cert__scope {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--warm);
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

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

.page-about .about-steps li {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-steps li:hover {
  border-color: var(--amber);
  color: var(--red);
}

/* ---------- 全宽横条 ---------- */
.page-about .about-band {
  background: var(--navy);
  color: var(--paper);
  padding-block: clamp(38px, 6vw, 76px);
  border-top: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
}

.page-about .about-band .ax-kicker {
  color: var(--cyan);
}

.page-about .about-band__text {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--on-dark);
  margin: 18px 0 0;
  max-width: 58ch;
}

.page-about .about-stats {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-stat {
  border-top: 1px solid rgba(244, 238, 226, 0.3);
  padding-top: 12px;
  min-width: 0;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--on-dark);
}

/* ---------- 客户所得与行动 ---------- */
.page-about .about-results {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-result {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  min-width: 0;
}

.page-about .about-cta {
  margin-top: clamp(28px, 4.4vw, 46px);
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  padding: clamp(20px, 3.2vw, 32px);
  background: var(--paper-2);
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-about .about-cta > * {
  min-width: 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .ax-btn {
  font-family: var(--sans);
  font-size: 15px;
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 20px;
  display: inline-block;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-cta__actions .ax-btn--solid {
  background: var(--red);
  color: var(--paper);
  border: 1px solid var(--red);
}

.page-about .about-cta__actions .ax-btn--solid:hover {
  background: var(--red-deep);
  border-color: var(--red-deep);
}

.page-about .about-cta__actions .ax-btn--line {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--line-strong);
}

.page-about .about-cta__actions .ax-btn--line:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-results {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

@media (min-width: 760px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-duo--team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 880px) {
  .page-about .about-ch__grid {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-tl-wrap {
    grid-template-columns: minmax(0, 1fr) 280px;
  }

  .page-about .about-tl__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.24s var(--ease), opacity 0.24s var(--ease), margin-top 0.24s var(--ease);
  }

  .page-about .about-tl__item:hover .about-tl__note {
    max-height: 140px;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-mast__grid {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }
}

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