.page-about {
  --about-hair: rgba(46, 91, 78, 0.18);
  --about-body: rgba(42, 33, 25, 0.78);
  --about-cyan-line: rgba(61, 242, 208, 0.28);
  background-color: var(--cream-paper);
  color: var(--ink-brown);
  overflow-x: hidden;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 10px 0 14px;
  color: inherit;
}

.page-about .about-section {
  padding: clamp(46px, 7vw, 92px) 0;
}

.page-about .about-section__head {
  max-width: 62ch;
}

.page-about .about-section__lede {
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-body);
  margin: 0;
}

.page-about .about-section > .content-shell > .eyebrow,
.page-about .about-section__head .eyebrow,
.page-about .about-position__label .eyebrow,
.page-about .about-team__intro .eyebrow,
.page-about .about-reach__head .eyebrow,
.page-about .about-cta .eyebrow {
  color: var(--deep-forest);
}

/* ---------- 首屏 ---------- */

.page-about .about-masthead {
  position: relative;
  padding: clamp(16px, 3vw, 28px) 0 clamp(44px, 7vw, 80px);
  background:
    radial-gradient(circle at 84% 8%, rgba(61, 242, 208, 0.16), transparent 56%),
    radial-gradient(circle at 8% 92%, rgba(244, 184, 74, 0.12), transparent 52%),
    linear-gradient(178deg, var(--night-pitch), var(--deep-forest));
  color: var(--warm-white);
  overflow: hidden;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(23, 71, 58, 0.6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 71, 58, 0.6) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.32;
  pointer-events: none;
}

.page-about .about-masthead .content-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-masthead .breadcrumbs__link,
.page-about .about-masthead .breadcrumbs__current {
  color: var(--muted-sage);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-about .about-masthead .breadcrumbs__link:hover,
.page-about .about-masthead .breadcrumbs__link:focus-visible {
  color: var(--fluoro-cyan);
}

.page-about .about-masthead .eyebrow {
  color: var(--fluoro-cyan);
}

.page-about .about-masthead .display-title {
  margin: 12px 0 18px;
  color: var(--warm-white);
}

.page-about .about-masthead .lede {
  color: rgba(251, 247, 239, 0.82);
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-masthead__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(20px, 4vw, 38px);
}

.page-about .about-masthead__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--about-cyan-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-about .about-masthead__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-masthead__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--fluoro-cyan);
}

.page-about .about-masthead__facts span:last-child {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-sage);
}

.page-about .about-masthead__figure {
  margin: 0;
}

.page-about .about-masthead__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px 22px 22px 6px;
  object-fit: cover;
}

.page-about .about-masthead__figure .media-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted-sage);
}

/* ---------- 品牌主张 ---------- */

.page-about .about-position {
  background-color: var(--cream-paper);
}

.page-about .about-position__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-position__body p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0 0 14px;
}

.page-about .about-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-points li {
  background-color: var(--warm-white);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--deep-forest);
  border-radius: 6px 20px 20px 20px;
  padding: 18px 20px 20px;
}

.page-about .about-points h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.06em;
  margin: 0 0 8px;
  color: var(--deep-forest);
}

.page-about .about-points p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- 发展历程 ---------- */

.page-about .about-timeline {
  background-color: var(--warm-white);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-timeline__figure {
  margin: clamp(22px, 4vw, 36px) 0 clamp(26px, 4vw, 44px);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px 18px 6px 18px;
  object-fit: cover;
}

.page-about .about-timeline__figure .media-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--about-body);
}

.page-about .about-timeline__layout {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--about-body);
  margin: 0 0 10px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: rgba(42, 33, 25, 0.55);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.24s ease, border-color 0.24s ease;
}

.page-about .about-index__link::before {
  content: "";
  width: 12px;
  height: 1px;
  background-color: currentColor;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--deep-forest);
  border-bottom-color: var(--amber-rank);
}

.page-about .about-index__link.is-active {
  color: var(--deep-forest);
  border-bottom-color: var(--amber-rank);
}

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

.page-about .about-era {
  position: relative;
  padding: 20px 0 22px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-era:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-era__year {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 28px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--deep-forest);
  margin: 0 0 10px;
}

.page-about .about-era__year::after {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-top: 10px;
  background-color: var(--amber-rank);
  border-radius: 2px;
}

.page-about .about-era__body h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  letter-spacing: 0.03em;
  margin: 0 0 8px;
  color: var(--ink-brown);
}

.page-about .about-era__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
  max-width: 62ch;
}

.page-about .about-era--now .about-era__year {
  color: var(--signal-red);
}

.page-about .about-era--now .about-era__year::after {
  background-color: var(--signal-red);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background-color: var(--cream-paper);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-team__intro p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0 0 20px;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px 6px 22px 22px;
  object-fit: cover;
}

.page-about .about-team__figure .media-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--about-body);
}

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

.page-about .about-role {
  background-color: var(--warm-white);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-organic);
  padding: 20px 22px 22px;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(6, 26, 21, 0.12);
  border-color: rgba(61, 242, 208, 0.5);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--deep-forest);
  margin: 0 0 10px;
}

.page-about .about-role h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.05em;
  margin: 0 0 8px;
  color: var(--ink-brown);
}

.page-about .about-role p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- 覆盖与响应 ---------- */

.page-about .about-reach {
  background:
    radial-gradient(circle at 12% 0%, rgba(61, 242, 208, 0.14), transparent 52%),
    linear-gradient(168deg, var(--deep-forest), var(--night-pitch) 78%);
  color: var(--warm-white);
}

.page-about .about-reach__head {
  max-width: 62ch;
}

.page-about .about-reach__head .eyebrow {
  color: var(--fluoro-cyan);
}

.page-about .about-reach .about-h2 {
  color: var(--warm-white);
}

.page-about .about-reach__lede {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.78);
  margin: 0;
}

.page-about .about-reach__stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--table-line);
  border: 1px solid var(--table-line);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-reach__stats li {
  background-color: rgba(6, 26, 21, 0.72);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-rank);
}

.page-about .about-reach__cap {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-sage);
}

.page-about .about-reach__notes {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-reach__notes h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.05em;
  margin: 0 0 8px;
  color: var(--fluoro-cyan);
}

.page-about .about-reach__notes p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(251, 247, 239, 0.76);
}

/* ---------- 合作与认可 ---------- */

.page-about .about-eco {
  background-color: var(--cream-paper);
}

.page-about .about-eco__strip {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0 0 12px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-eco__strip li {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-hair);
  background-color: var(--warm-white);
  font-size: 14px;
  color: var(--ink-brown);
  white-space: nowrap;
}

.page-about .about-eco__strip li:nth-child(3n) {
  border-color: rgba(244, 184, 74, 0.55);
}

.page-about .about-honor {
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-honor details {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-honor summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--ink-brown);
}

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

.page-about .about-honor summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--deep-forest);
}

.page-about .about-honor details[open] summary::after {
  content: "×";
  color: var(--signal-red);
}

.page-about .about-honor summary:focus-visible {
  outline: 2px solid var(--focus-glow);
  outline-offset: 4px;
}

.page-about .about-honor__body p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 服务方法 ---------- */

.page-about .about-method {
  background-color: var(--warm-white);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-steps {
  list-style: none;
  counter-reset: step;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-steps li {
  counter-increment: step;
  position: relative;
  background-color: var(--cream-paper);
  border: 1px solid var(--about-hair);
  border-radius: 20px 20px 6px 20px;
  padding: 22px 22px 24px;
}

.page-about .about-steps li::before {
  content: "0" counter(step);
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--amber-rank);
  margin-bottom: 10px;
}

.page-about .about-steps h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.05em;
  margin: 0 0 8px;
  color: var(--deep-forest);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------- 收束 ---------- */

.page-about .about-cta {
  background:
    radial-gradient(circle at 88% 20%, rgba(61, 242, 208, 0.16), transparent 58%),
    linear-gradient(180deg, var(--deep-forest), var(--night-pitch));
  color: var(--warm-white);
  padding: clamp(44px, 7vw, 84px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-cta__copy {
  max-width: 60ch;
}

.page-about .about-cta .eyebrow {
  color: var(--fluoro-cyan);
}

.page-about .about-cta .about-h2 {
  color: var(--warm-white);
}

.page-about .about-cta__copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.78);
}

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

.page-about .about-cta__actions .button--ghost {
  color: var(--warm-white);
  border-color: rgba(61, 242, 208, 0.5);
}

.page-about .about-cta__actions .button--ghost:hover,
.page-about .about-cta__actions .button--ghost:focus-visible {
  color: var(--fluoro-cyan);
  border-color: var(--fluoro-cyan);
}

.page-about .about-cta__actions a:focus-visible {
  outline: 2px solid var(--focus-glow);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

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

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

  .page-about .about-reach__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-reach__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 760px) {
  .page-about .about-era {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 0 30px;
    padding: 26px 0;
  }

  .page-about .about-era__year {
    margin: 0;
  }

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

  .page-about .about-role--2,
  .page-about .about-role--4 {
    margin-top: 30px;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-about .about-masthead__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
  }

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

  .page-about .about-timeline__index {
    position: sticky;
    top: 108px;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(40px, 5vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
    box-shadow: none;
  }
}