.page-about {
  --ab-space: clamp(52px, 8vw, 118px);
  --ab-card: #1C2422;
  --ab-card-hi: #212B27;
}

/* ---------- 面包屑与首屏 ---------- */

.page-about > .ab-crumb {
  max-width: var(--ky-w);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 34px) var(--ky-gutter) 0;
}

.page-about .ab-hero {
  padding: clamp(28px, 4vw, 52px) 0 clamp(44px, 6vw, 88px);
  border-bottom: 1px solid var(--ky-line-soft);
}

.page-about .ab-hero h1 {
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.1vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ky-white);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .ab-hero .ky-lede {
  margin-top: 22px;
  max-width: 66ch;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ky-line);
  border: 1px solid var(--ky-line);
  margin-top: clamp(30px, 4vw, 50px);
}

.page-about .ab-hero__stats .ky-metric {
  padding: 16px 18px;
  background: rgba(28, 36, 34, 0.72);
  min-width: 0;
}

@media (min-width: 760px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-hero__stats .ky-metric {
    padding: 20px 22px;
  }
}

/* ---------- 通用分栏（左图右文 / 右图左文交替） ---------- */

.page-about .ab-split {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 4vw, 52px);
}

.page-about .ab-split__media,
.page-about .ab-split__body {
  min-width: 0;
}

.page-about .ab-split__body > p:not(.ky-eyebrow) {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ky-warm);
}

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

.page-about .ab-split__title {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 25px);
  line-height: 1.36;
  color: var(--ky-white);
  margin: 0 0 14px;
}

@media (min-width: 900px) {
  .page-about .ab-split {
    flex-direction: row;
    align-items: center;
  }
  .page-about .ab-split__media {
    flex: 0 0 52%;
  }
  .page-about .ab-split__body {
    flex: 1 1 auto;
  }
  .page-about .ab-split--flip {
    flex-direction: row-reverse;
  }
  .page-about .ab-split--flip .ab-split__media {
    flex: 0 0 46%;
  }
}

.page-about .ab-creed {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ky-line);
}

.page-about .ab-creed li {
  position: relative;
  padding: 12px 0 12px 22px;
  border-bottom: 1px solid var(--ky-line-soft);
  font-size: 15px;
  color: var(--ky-warm);
}

.page-about .ab-creed li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 9px;
  height: 2px;
  background: var(--ky-orange);
  transform: translateY(-50%);
}

/* ---------- 团队分工技能树 ---------- */

.page-about .ab-tree {
  margin-top: clamp(30px, 4vw, 54px);
}

.page-about .ab-tree__root {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 16px 20px;
  border: 1px solid var(--ky-line-strong);
  background: linear-gradient(90deg, rgba(245, 197, 66, 0.14), rgba(10, 21, 38, 0.6) 78%);
}

.page-about .ab-tree__root::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--ky-signal), rgba(245, 197, 66, 0) 76%);
}

.page-about .ab-tree__root-name {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--ky-white);
}

.page-about .ab-tree__root-note {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ky-signal);
}

.page-about .ab-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ky-line);
  border: 1px solid var(--ky-line);
  border-top: 0;
}

@media (min-width: 700px) {
  .page-about .ab-tree__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .ab-tree__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-branch {
  position: relative;
  min-width: 0;
  padding: 22px 20px 24px;
  background: var(--ab-card);
  border-left: 2px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-branch:hover,
.page-about .ab-branch:focus-within,
.page-about .ab-branch:focus {
  background: var(--ab-card-hi);
  border-left-color: var(--ky-signal);
  outline: none;
}

.page-about .ab-branch__no {
  display: block;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ky-orange);
}

.page-about .ab-branch__name {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ky-white);
  margin: 8px 0 10px;
}

.page-about .ab-branch__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ky-warm);
}

.page-about .ab-branch__more {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(214, 210, 196, 0.72);
  max-height: 24rem;
  opacity: 1;
  transition: max-height 0.32s ease, opacity 0.32s ease, margin-top 0.32s ease;
}

@media (hover: hover) and (min-width: 1120px) {
  .page-about .ab-branch__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
  }
  .page-about .ab-branch:hover .ab-branch__more,
  .page-about .ab-branch:focus-within .ab-branch__more {
    max-height: 24rem;
    opacity: 1;
    margin-top: 12px;
  }
}

/* ---------- 审核三步条 ---------- */

.page-about .ab-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ky-line);
  border: 1px solid var(--ky-line);
}

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

.page-about .ab-step {
  position: relative;
  min-width: 0;
  padding: 24px 22px 28px;
  background: var(--ab-card);
}

.page-about .ab-step::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--ky-signal);
}

.page-about .ab-step__no {
  display: block;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ky-signal);
}

.page-about .ab-step__name {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--ky-white);
  margin: 10px 0 8px;
}

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

.page-about .ab-review__detail {
  margin-top: clamp(38px, 5vw, 72px);
}

/* ---------- 发展时间线 ---------- */

.page-about .ab-history__media {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .ab-timeline {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .ab-timeline__rail {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--ky-line);
  min-width: 0;
}

.page-about .ab-timeline__tab {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  min-width: 0;
  text-align: left;
  padding: 13px 18px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ky-line-soft);
  color: var(--ky-warm);
  font-family: var(--ky-font-body);
  font-size: 15px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .ab-timeline__tab::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--ky-signal);
  transform: translateY(-50%);
  transition: height 0.25s ease;
}

.page-about .ab-timeline__tab:hover {
  background: rgba(214, 210, 196, 0.05);
  color: var(--ky-white);
}

.page-about .ab-timeline__tab:focus-visible {
  outline: 2px solid var(--ky-orange);
  outline-offset: -2px;
}

.page-about .ab-timeline__tab[aria-selected="true"] {
  color: var(--ky-white);
  background: rgba(245, 197, 66, 0.07);
}

.page-about .ab-timeline__tab[aria-selected="true"]::before {
  height: 62%;
}

.page-about .ab-timeline__no {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ky-orange);
  flex: 0 0 auto;
}

.page-about .ab-timeline__tab[aria-selected="true"] .ab-timeline__no {
  color: var(--ky-signal);
}

.page-about .ab-timeline__label {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-about .ab-timeline__panel {
  min-width: 0;
  margin-top: 20px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--ky-line);
  background: linear-gradient(158deg, rgba(28, 36, 34, 0.96), rgba(11, 31, 26, 0.98));
}

.page-about .ab-timeline__panel[hidden],
.page-about .ab-eco__panel[hidden] {
  display: none;
}

.page-about .ab-timeline__title {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.34;
  color: var(--ky-white);
  margin: 0 0 14px;
}

.page-about .ab-timeline__panel > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ky-warm);
}

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

.page-about .ab-timeline__points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(214, 210, 196, 0.8);
}

.page-about .ab-timeline__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background: var(--ky-orange);
}

@media (min-width: 900px) {
  .page-about .ab-timeline {
    grid-template-columns: minmax(180px, 258px) minmax(0, 1fr);
    column-gap: clamp(28px, 5vw, 70px);
    align-items: start;
  }
  .page-about .ab-timeline__rail {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .ab-timeline__panel {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }
}

/* ---------- 服务覆盖 ---------- */

.page-about .ab-cov {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ky-line);
}

.page-about .ab-cov__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ky-line-soft);
}

@media (min-width: 640px) {
  .page-about .ab-cov__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
    padding: 22px 0;
  }
}

.page-about .ab-cov__k {
  font-family: var(--ky-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ky-orange);
}

.page-about .ab-cov__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ky-warm);
}

.page-about .ab-coverage__note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ky-warm);
  max-width: 72ch;
}

.page-about .ab-coverage__note a {
  color: var(--ky-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 26, 0.4);
}

.page-about .ab-coverage__note a:hover,
.page-about .ab-coverage__note a:focus-visible {
  color: var(--ky-signal);
  border-bottom-color: var(--ky-signal);
}

/* ---------- 合作生态标签页 ---------- */

.page-about .ab-eco__scope {
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .ab-eco__tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--ky-line);
}

.page-about .ab-eco__tab {
  margin-bottom: -1px;
  padding: 12px 18px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--ky-warm);
  font-family: var(--ky-font-body);
  font-size: 14.5px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-eco__tab:hover {
  color: var(--ky-white);
}

.page-about .ab-eco__tab:focus-visible {
  outline: 2px solid var(--ky-orange);
  outline-offset: 2px;
}

.page-about .ab-eco__tab[aria-selected="true"] {
  color: var(--ky-signal);
  border-bottom-color: var(--ky-signal);
}

.page-about .ab-eco__panel {
  padding: clamp(20px, 3vw, 32px) 0 0;
  max-width: 80ch;
}

.page-about .ab-eco__panel > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ky-warm);
}

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

.page-about .ab-eco__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-eco__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(214, 210, 196, 0.86);
}

/* ---------- 结尾指引 ---------- */

.page-about .ab-cta {
  margin-top: var(--ab-space);
  border-top: 1px solid var(--ky-line);
  border-bottom: 1px solid var(--ky-line);
  background: linear-gradient(118deg, rgba(10, 21, 38, 0.92), rgba(11, 31, 26, 0.7) 58%, rgba(255, 122, 26, 0.1));
}

.page-about .ab-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding-top: clamp(32px, 5vw, 60px);
  padding-bottom: clamp(32px, 5vw, 60px);
}

@media (min-width: 900px) {
  .page-about .ab-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
  }
}

.page-about .ab-cta__text {
  min-width: 0;
}

.page-about .ab-cta__title {
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.8vw, 32px);
  line-height: 1.28;
  color: var(--ky-white);
  margin: 0 0 10px;
}

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

.page-about .ab-cta__text a {
  color: var(--ky-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 26, 0.4);
}

.page-about .ab-cta__text a:hover,
.page-about .ab-cta__text a:focus-visible {
  color: var(--ky-signal);
  border-bottom-color: var(--ky-signal);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex: 0 0 auto;
}
<<<END>>>