.page-about {
  color: var(--cream);
  overflow-x: hidden;
}

.page-about .ab-crumb {
  padding-top: 22px;
}

.page-about .ab-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .ab-crumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .ab-crumb a:hover,
.page-about .ab-crumb a:focus-visible {
  color: var(--lime);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  display: grid;
  gap: 36px;
  padding: 40px 0 64px;
}

.page-about .ab-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(38px, 10vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .ab-hero__lede {
  max-width: 46em;
  margin: 0 0 28px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--cream);
}

.page-about .ab-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--turf);
}

.page-about .ab-index__item {
  border-top: 1px solid var(--turf);
}

.page-about .ab-index__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  text-decoration: none;
  color: var(--cream);
}

.page-about .ab-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
  min-width: 2.2em;
}

.page-about .ab-index__label {
  font-family: var(--font-display);
  font-size: 21px;
  letter-spacing: 0.06em;
  font-weight: 400;
}

.page-about .ab-index__link:hover .ab-index__label,
.page-about .ab-index__link:focus-visible .ab-index__label {
  color: var(--lime);
}

.page-about .ab-index__note {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  transition: max-height 220ms var(--ease), opacity 220ms var(--ease), padding 220ms var(--ease);
}

.page-about .ab-index__item:hover .ab-index__note,
.page-about .ab-index__item:focus-within .ab-index__note {
  max-height: 5em;
  opacity: 1;
  padding-bottom: 14px;
}

/* ---------- 起点 ---------- */
.page-about .ab-band {
  padding: 56px 0;
  border-top: 1px solid var(--turf);
}

.page-about .ab-band__inner {
  display: grid;
  gap: 36px;
}

.page-about .ab-band__title {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .ab-prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cream);
}

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

.page-about .ab-prose a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--turf);
  border: 1px solid var(--turf);
}

.page-about .ab-facts__row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--pitch);
}

.page-about .ab-facts__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .ab-facts__num em {
  font-style: normal;
  font-size: 16px;
  color: var(--ember);
  margin-left: 2px;
}

.page-about .ab-facts__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 赛季时间带 ---------- */
.page-about .ab-timeline {
  position: relative;
  margin: 8px 0 0;
  background: var(--pitch);
  border-top: 1px solid var(--turf);
  border-bottom: 1px solid var(--turf);
  overflow: hidden;
}

.page-about .ab-timeline__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.55);
  pointer-events: none;
}

.page-about .ab-timeline__inner {
  position: relative;
  padding: 40px 0 44px;
}

.page-about .ab-timeline__title {
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .ab-timeline__track {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-timeline__track::-webkit-scrollbar {
  height: 3px;
}

.page-about .ab-timeline__track::-webkit-scrollbar-thumb {
  background: var(--turf);
}

.page-about .ab-timeline__node {
  flex: 0 0 74%;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 18px 22px;
  border: 1px solid var(--turf);
  border-left: 3px solid var(--amber);
  background: rgba(12, 19, 16, 0.72);
  text-decoration: none;
  transition: border-left-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .ab-timeline__node:hover,
.page-about .ab-timeline__node:focus-visible {
  border-left-color: var(--lime);
  background: rgba(12, 19, 16, 0.92);
}

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

.page-about .ab-timeline__node:hover .ab-timeline__stage {
  color: var(--lime);
}

.page-about .ab-timeline__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--cream);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding: 60px 0;
}

.page-about .ab-team__inner {
  display: grid;
  gap: 34px;
}

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

.page-about .ab-team__figure img,
.page-about .ab-reach__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  border: 1px solid var(--turf);
}

.page-about .ab-team__body h2 {
  margin: 14px 0 14px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .ab-team__intro {
  margin: 0 0 26px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-role {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--turf);
  border-top: 1px solid var(--turf);
  border-bottom: 1px solid var(--turf);
}

.page-about .ab-role__item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 4px;
  background: var(--ink);
}

.page-about .ab-role__count {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--ember);
  min-width: 1.6em;
}

.page-about .ab-role__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .ab-role__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 整理方法 ---------- */
.page-about .ab-method {
  background: var(--cream);
  color: var(--ink);
  padding: 60px 0;
}

.page-about .ab-method__head {
  margin-bottom: 34px;
}

.page-about .ab-method .index-tag {
  color: #6a7a70;
}

.page-about .ab-method__title {
  margin: 14px 0 16px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-method__lead {
  max-width: 40em;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: #46554d;
}

.page-about .ab-step {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: #cfc1a4;
}

.page-about .ab-step__item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--cream);
  border-left: 3px solid var(--pitch);
}

.page-about .ab-step__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: #6a7a70;
  margin-bottom: 10px;
}

.page-about .ab-step__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .ab-step__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: #3d4a43;
}

.page-about .ab-method__foot {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: #3d4a43;
}

.page-about .ab-method__foot a {
  color: #8a3a10;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 覆盖与协作 ---------- */
.page-about .ab-reach {
  padding: 60px 0;
}

.page-about .ab-reach__inner {
  display: grid;
  gap: 34px;
}

.page-about .ab-reach__body h2 {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

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

.page-about .ab-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-about .ab-chips .chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 6px 12px;
}

/* ---------- 回访档案 ---------- */
.page-about .ab-archive {
  background: var(--pitch);
  border-top: 1px solid var(--turf);
  border-bottom: 1px solid var(--turf);
  padding: 60px 0;
}

.page-about .ab-index-tag--light {
  color: var(--lime);
}

.page-about .ab-archive__title {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .ab-archive__lead {
  max-width: 44em;
  margin: 0 0 34px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cream);
}

.page-about .ab-card-row {
  display: grid;
  gap: 1px;
  background: var(--turf);
  border: 1px solid var(--turf);
}

.page-about .ab-card {
  padding: 24px 20px 26px;
  background: rgba(12, 19, 16, 0.55);
}

.page-about .ab-card__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--lime);
}

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

.page-about .ab-archive__foot {
  margin: 30px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .ab-archive__foot a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 服务承诺 ---------- */
.page-about .ab-promise {
  padding: 60px 0;
}

.page-about .ab-promise__head h2 {
  margin: 14px 0 30px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .ab-promise__grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-promise__block {
  padding: 24px 20px 26px;
  border: 1px solid var(--turf);
  border-top: 3px solid var(--lime);
  background: rgba(18, 58, 44, 0.35);
}

.page-about .ab-promise__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  margin-bottom: 12px;
}

.page-about .ab-promise__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .ab-promise__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 结尾入口 ---------- */
.page-about .ab-next {
  background: var(--cream);
  color: var(--ink);
  padding: 52px 0 60px;
}

.page-about .ab-next__inner {
  display: grid;
  gap: 26px;
}

.page-about .ab-next__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-next__desc {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.75;
  color: #46554d;
}

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

.page-about .ab-next__actions .btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 11px 18px;
  text-decoration: none;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-about .ab-next__actions .btn--signal {
  background: var(--ink);
  color: var(--lime);
  border-color: var(--ink);
}

.page-about .ab-next__actions .btn--ghost:hover,
.page-about .ab-next__actions .btn--ghost:focus-visible,
.page-about .ab-next__actions .btn--signal:hover,
.page-about .ab-next__actions .btn--signal:focus-visible {
  background: var(--ember);
  color: var(--ink);
  border-color: var(--ember);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .ab-hero {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
    padding: 56px 0 76px;
  }

  .page-about .ab-band__inner {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-facts {
    grid-template-columns: 1fr;
  }

  .page-about .ab-team__inner {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
    align-items: center;
  }

  .page-about .ab-reach__inner {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
    align-items: center;
  }

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

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

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

  .page-about .ab-next__inner {
    grid-template-columns: 6fr 6fr;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-timeline__track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-timeline__node {
    flex: none;
  }

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

  .page-about .ab-step__item {
    padding: 26px 22px 30px;
  }

  .page-about .ab-role__item {
    padding: 22px 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__note,
  .page-about .ab-timeline__node,
  .page-about .ab-next__actions .btn {
    transition: none;
  }
}