.page-about {
  --ab-gap: clamp(20px, 3vw, 44px);
  --ab-pad: clamp(18px, 3vw, 34px);
  --ab-hair: 2px solid var(--line);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about .section {
  padding-block: clamp(40px, 6.5vw, 88px);
}

.page-about .ab-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.page-about p {
  margin: 0;
}

/* 首屏 */
.page-about .ab-hero {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .ab-hero__frame {
  position: relative;
  border: 3px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow);
  padding: var(--ab-pad);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--sage-strong);
}

.page-about .ab-crumb__link {
  color: var(--sage-strong);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color var(--dur) ease-out, border-color var(--dur) ease-out;
}

.page-about .ab-crumb__link:hover,
.page-about .ab-crumb__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  outline: none;
}

.page-about .ab-crumb__sep {
  color: var(--line);
}

.page-about .ab-crumb__now {
  color: var(--paper);
  font-weight: 700;
}

.page-about .ab-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.4vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .ab-hero__lede {
  margin-top: 18px;
  max-width: 54ch;
  font-size: clamp(0.98rem, 0.5vw + 0.85rem, 1.125rem);
  color: var(--text-dim);
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: var(--ab-hair);
}

.page-about .ab-hero__stat {
  background: var(--ink);
  padding: 14px 16px 16px;
}

.page-about .ab-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(1.4rem, 3.2vw, 1.95rem);
  line-height: 1.1;
  color: var(--orange);
}

.page-about .ab-hero__key {
  display: block;
  margin-top: 6px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--sage-strong);
}

.page-about .ab-hero__media {
  margin: 0;
  position: relative;
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 2px solid var(--line);
  filter: saturate(1.05);
}

.page-about .ab-hero__cap {
  display: block;
  margin-top: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--lime);
  font-size: 0.8125rem;
  color: var(--sage-strong);
}

/* 品牌起点 */
.page-about .ab-origin__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-origin__aside {
  align-self: start;
  border-top: 4px solid var(--orange);
  padding-top: 18px;
}

.page-about .ab-origin__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  color: var(--lime);
  text-wrap: balance;
}

.page-about .ab-origin__mark {
  margin-top: 16px;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--sage-strong);
}

.page-about .ab-origin__mark .ab-mono {
  font-size: 1.35rem;
  color: var(--paper);
  margin-right: 6px;
}

.page-about .ab-origin__body p + p {
  margin-top: 16px;
}

.page-about .ab-origin__body p {
  color: var(--text-dim);
  font-size: 1rem;
}

.page-about .ab-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-facts li {
  position: relative;
  padding-left: 26px;
  font-size: 0.9375rem;
  color: var(--paper);
}

.page-about .ab-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 14px;
  height: 3px;
  background: var(--lime);
}

/* 时间线 */
.page-about .ab-tl {
  background: var(--ink-3);
  border-top: var(--ab-hair);
  border-bottom: var(--ab-hair);
}

.page-about .ab-tl__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-tl__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  color: var(--white);
  text-wrap: balance;
}

.page-about .ab-tl__hint {
  margin-top: 14px;
  font-size: 0.9375rem;
  color: var(--text-dim);
}

.page-about .ab-tl__ticks {
  height: 46px;
  margin-top: 24px;
  border-bottom: var(--ab-hair);
  background-image: repeating-linear-gradient(to right, var(--line) 0 2px, transparent 2px 18px);
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 100% 28%;
}

.page-about .ab-tl__now {
  margin-top: 14px;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--sage-strong);
}

.page-about .ab-tl__now-num {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  background: var(--lime);
  color: var(--ink);
  font-size: 0.9375rem;
  border-radius: var(--radius);
}

.page-about .ab-tl__item {
  border: var(--ab-hair);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
}

.page-about .ab-tl__item + .ab-tl__item {
  margin-top: 16px;
}

.page-about .ab-tl__h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .ab-tl__btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 18px;
  background: none;
  border: 0;
  color: var(--paper);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  transition: background var(--dur) ease-out, color var(--dur) ease-out;
}

.page-about .ab-tl__btn:hover {
  background: rgba(200, 255, 61, 0.07);
}

.page-about .ab-tl__btn:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: -3px;
}

.page-about .ab-tl__btn[aria-expanded="true"] {
  color: var(--lime);
}

.page-about .ab-tl__ver {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 3px 9px;
  background: var(--line);
  color: var(--lime);
  border-radius: var(--radius);
}

.page-about .ab-tl__btn[aria-expanded="true"] .ab-tl__ver {
  background: var(--lime);
  color: var(--ink);
}

.page-about .ab-tl__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .ab-tl__icon {
  flex: 0 0 auto;
  position: relative;
  width: 26px;
  height: 26px;
  border: 2px solid var(--line);
}

.page-about .ab-tl__icon::before,
.page-about .ab-tl__icon::after {
  content: "";
  position: absolute;
  background: var(--lime);
}

.page-about .ab-tl__icon::before {
  left: 50%;
  top: 5px;
  bottom: 5px;
  width: 2px;
  transform: translateX(-50%);
}

.page-about .ab-tl__icon::after {
  top: 50%;
  left: 5px;
  right: 5px;
  height: 2px;
  transform: translateY(-50%);
}

.page-about .ab-tl__btn[aria-expanded="true"] .ab-tl__icon::before {
  display: none;
}

.page-about .ab-tl__panel {
  padding: 0 18px 20px;
  border-top: 2px solid var(--line);
  padding-top: 16px;
  font-size: 0.9375rem;
  color: var(--text-dim);
}

.page-about .ab-tl__panel[hidden] {
  display: none;
}

.page-about .ab-tl__panel ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ab-tl__panel li {
  position: relative;
  padding-left: 20px;
}

.page-about .ab-tl__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--lime);
}

/* 团队 */
.page-about .ab-team {
  background: var(--paper);
  color: var(--ink);
  border-top: 3px solid var(--line);
  border-bottom: 3px solid var(--line);
}

.page-about .ab-team .eyebrow {
  color: var(--ink);
  display: inline-block;
  padding-left: 12px;
  border-left: 4px solid var(--orange);
}

.page-about .ab-team__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-team__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.8rem);
  line-height: 1.15;
  color: var(--ink);
}

.page-about .ab-team__lede {
  margin-top: 14px;
  font-size: 1rem;
  color: var(--ink);
  max-width: 46ch;
}

.page-about .ab-team__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 2px solid rgba(7, 26, 20, 0.2);
}

.page-about .ab-team__stat {
  padding-bottom: 8px;
  border-bottom: 3px solid rgba(7, 26, 20, 0.25);
}

.page-about .ab-team__stat--accent {
  border-bottom-color: var(--orange);
}

.page-about .ab-team__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.05;
  color: var(--ink);
}

.page-about .ab-team__key {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  color: rgba(7, 26, 20, 0.72);
}

.page-about .ab-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .ab-step__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 4px 0;
  text-align: center;
  background: var(--ink);
  color: var(--lime);
  border-radius: var(--radius);
}

.page-about .ab-step__name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .ab-step__desc {
  margin-top: 2px;
  font-size: 0.9375rem;
  color: rgba(7, 26, 20, 0.82);
}

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-sm);
}

.page-about .ab-team__cap {
  display: block;
  margin-top: 10px;
  font-size: 0.8125rem;
  color: rgba(7, 26, 20, 0.72);
}

/* 覆盖 */
.page-about .ab-cover__grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-cover__media {
  margin: 0;
}

.page-about .ab-cover__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: var(--ab-hair);
  box-shadow: var(--shadow-sm);
}

.page-about .ab-cover__cap {
  display: block;
  margin-top: 10px;
  font-size: 0.8125rem;
  color: var(--sage-strong);
}

.page-about .ab-cover__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.18;
  color: var(--white);
  text-wrap: balance;
}

.page-about .ab-cover__lede {
  margin-top: 14px;
  font-size: 1rem;
  color: var(--text-dim);
}

.page-about .ab-cover__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(115px, 1fr));
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: var(--ab-hair);
}

.page-about .ab-cover__stat {
  background: var(--ink-2);
  padding: 14px 14px 16px;
}

.page-about .ab-cover__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(1.3rem, 2.6vw, 1.75rem);
  line-height: 1.1;
  color: var(--orange);
}

.page-about .ab-cover__key {
  display: block;
  margin-top: 5px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--sage-strong);
}

.page-about .ab-cover__rate {
  margin-top: 22px;
}

.page-about .ab-cover__rate-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .ab-cover__rate-key {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--sage-strong);
}

.page-about .ab-cover__rate-num {
  font-size: 1.15rem;
  color: var(--lime);
}

.page-about .ab-bar {
  height: 10px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .ab-bar__fill {
  display: block;
  height: 100%;
  background: var(--lime);
}

.page-about .ab-bar__fill--87 {
  width: 87%;
}

.page-about .ab-partners {
  margin-top: clamp(34px, 5vw, 62px);
  padding-top: 26px;
  border-top: var(--ab-hair);
}

.page-about .ab-partners__title,
.page-about .ab-honors__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  color: var(--white);
}

.page-about .ab-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-partner {
  background: var(--ink-2);
  border: var(--ab-hair);
  border-left: 5px solid var(--lime);
  padding: 18px 18px 20px;
  transition: transform var(--dur) ease-out, box-shadow var(--dur) ease-out;
}

.page-about .ab-partner:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .ab-partner:nth-child(3) {
  border-left-color: var(--blue);
}

.page-about .ab-partner:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-sm);
}

.page-about .ab-partner__name {
  margin: 10px 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-partner__desc {
  margin-top: 8px;
  font-size: 0.9375rem;
  color: var(--text-dim);
}

.page-about .ab-honors {
  margin-top: clamp(30px, 4vw, 52px);
  padding-top: 24px;
  border-top: var(--ab-hair);
}

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

.page-about .ab-honor {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.page-about .ab-honor__year {
  font-size: 1.05rem;
  color: var(--ink);
  border-bottom: 3px solid var(--orange);
  padding-bottom: 4px;
}

.page-about .ab-honor__name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .ab-honor__desc {
  margin-top: 4px;
  font-size: 0.875rem;
  color: rgba(7, 26, 20, 0.78);
}

/* 收束 */
.page-about .ab-close {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .ab-close__panel {
  border: 3px solid var(--lime);
  background: var(--ink-2);
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 48px);
}

.page-about .ab-close__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.7rem);
  line-height: 1.15;
  color: var(--white);
}

.page-about .ab-close__text {
  margin-top: 14px;
  max-width: 60ch;
  font-size: 1rem;
  color: var(--text-dim);
}

.page-about .ab-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-close__note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 2px dashed var(--line);
  font-size: 0.8125rem;
  color: var(--sage-strong);
}

.page-about .ab-close__link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime);
}

.page-about .ab-close__link:hover,
.page-about .ab-close__link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  outline: none;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-about .ab-hero__media img {
    max-height: 460px;
  }

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

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

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

  .page-about .ab-hero__media img {
    max-height: 520px;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .ab-cover__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(28px, 4vw, 56px);
  }

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

@media (min-width: 980px) {
  .page-about .ab-tl__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(30px, 4vw, 60px);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-partner,
  .page-about .ab-tl__btn,
  .page-about .ab-crumb__link {
    transition: none;
  }

  .page-about .ab-partner:hover {
    transform: none;
  }
}