.page-about {
  --ab-body: #C6D5E1;
  --ab-rule: rgba(90, 122, 147, 0.36);
  background: var(--ink);
  color: var(--white);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: calc(var(--bar-h) + 16px);
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(24px, 4vw, 56px) 0 clamp(48px, 8vw, 96px);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  right: -12%;
  top: 4%;
  width: min(58%, 620px);
  aspect-ratio: 1 / 1;
  background: var(--steel);
  border-radius: var(--r-lg);
  transform: rotate(-9deg);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  right: 8%;
  top: 42%;
  width: clamp(56px, 9vw, 118px);
  height: clamp(56px, 9vw, 118px);
  border-radius: 50%;
  background: var(--orange);
  opacity: 0.92;
}

.page-about .ab-hero__spine {
  display: none;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0.35em 0 0.5em;
  max-width: 18em;
}

.page-about .ab-hero__lede {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  max-width: 46ch;
  margin: 0;
}

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--orange);
  display: grid;
  gap: 18px;
}

.page-about .ab-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.15rem);
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .ab-fact__unit {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--orange);
  margin-left: 0.3em;
}

.page-about .ab-fact__label {
  display: block;
  margin-top: 7px;
  font-size: 0.8rem;
  letter-spacing: 0.07em;
  color: var(--mute);
}

/* ---------- 通用小节头 ---------- */
.page-about .ab-idx {
  font-family: var(--font-mono);
  color: var(--celadon);
  margin-right: 0.6em;
}

.page-about .ab-intro {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  max-width: 52ch;
  margin: 0 0 clamp(28px, 4vw, 44px);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--celadon) 0%, rgba(63, 169, 138, 0.12) 100%);
}

.page-about .ab-stage {
  position: relative;
  padding: 0 0 clamp(30px, 4.4vw, 48px) 36px;
}

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

.page-about .ab-stage__dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 5px rgba(63, 169, 138, 0.16);
}

.page-about .ab-stage:target .ab-stage__dot {
  background: var(--orange);
  box-shadow: 0 0 0 7px rgba(255, 106, 26, 0.2);
}

.page-about .ab-stage__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--celadon);
  margin: 0;
}

.page-about .ab-stage:target .ab-stage__no {
  color: var(--orange);
}

.page-about .ab-stage__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.4vw, 1.42rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin: 0.35em 0 0.55em;
  color: var(--white);
}

.page-about .ab-stage__text {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0;
  max-width: 58ch;
}

/* ---------- 基地 ---------- */
.page-about .ab-base__media {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-base__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-base__body p {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0 0 1.1em;
  max-width: 46ch;
}

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

.page-about .ab-cap__item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: baseline;
  gap: 0 10px;
  padding: 14px 0;
  border-top: 1px solid var(--ab-rule);
}

.page-about .ab-cap__item:last-child {
  border-bottom: 1px solid var(--ab-rule);
}

.page-about .ab-cap__v {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 700;
  color: var(--celadon);
  line-height: 1.2;
}

.page-about .ab-cap__k {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--mute);
}

.page-about .ab-cap__d {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mute);
  margin-top: 4px;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-team__body p {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0 0 1.1em;
  max-width: 50ch;
}

.page-about .ab-team__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-team__list li {
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  color: var(--mute);
  padding-left: 16px;
  position: relative;
}

.page-about .ab-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 7px;
  height: 2px;
  background: var(--orange);
}

.page-about .ab-team__list .num {
  color: var(--white);
  font-weight: 700;
}

/* ---------- 资质与质控（浅色带） ---------- */
.page-about .ab-light {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .ab-light .sec-head__title {
  color: var(--paper-ink);
}

.page-about .ab-light .eyebrow {
  color: var(--paper-mute);
}

.page-about .ab-light .ab-idx {
  color: var(--orange-deep);
}

.page-about .ab-quality {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .tabs__tab {
  font-family: var(--font-display);
  font-size: 0.84rem;
  letter-spacing: 0.02em;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(12, 26, 38, 0.2);
  background: transparent;
  color: var(--paper-ink);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-about .tabs__tab:hover {
  border-color: var(--ink);
}

.page-about .tabs__tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

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

.page-about .tabs__panel {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--paper-mute);
  max-width: 52ch;
}

.page-about .tabs__panel p {
  margin: 0;
}

.page-about .ab-cert {
  margin-top: clamp(24px, 3vw, 36px);
  display: grid;
  gap: 1px;
  background: rgba(12, 26, 38, 0.14);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-cert__item {
  background: var(--white);
  padding: 16px 16px 18px;
}

.page-about .ab-cert__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--orange-deep);
}

.page-about .ab-cert__t {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  margin: 0.45em 0 0.35em;
  color: var(--paper-ink);
}

.page-about .ab-cert__d {
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--paper-mute);
  margin: 0;
}

.page-about .ab-quality__cap {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--paper-mute);
  margin: 14px 0 0;
}

/* ---------- 行业应用 ---------- */
.page-about .ab-pills {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .ab-ind-list {
  display: grid;
  gap: 16px;
}

.page-about .ab-ind {
  background: var(--steel);
  border: 1px solid var(--ab-rule);
  border-radius: var(--r-md);
  padding: clamp(18px, 2.6vw, 26px);
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-about .ab-ind:hover {
  border-color: var(--celadon);
}

.page-about .ab-ind__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--celadon);
  margin: 0;
}

.page-about .ab-ind__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  margin: 0.35em 0 0.5em;
  color: var(--white);
}

.page-about .ab-ind__text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0;
}

.page-about .ab-partner {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--ab-rule);
}

.page-about .ab-partner__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  margin: 0 0 0.6em;
  color: var(--white);
}

.page-about .ab-partner__text {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 结尾行动区 ---------- */
.page-about .ab-cta {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  background: var(--steel);
  border-radius: var(--r-lg);
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--ab-rule);
}

.page-about .ab-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.25rem, 3vw, 1.85rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  color: var(--white);
}

.page-about .ab-cta__text {
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--ab-body);
  margin: 0;
  max-width: 54ch;
}

.page-about .ab-cta__actions {
  align-self: end;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-ind-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
  }

  .page-about .ab-base__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-quality {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    align-items: start;
  }

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

@media (min-width: 1040px) {
  .page-about .ab-hero__spine {
    display: block;
    position: absolute;
    z-index: 2;
    right: 18px;
    top: 28%;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.34em;
    color: var(--mute);
  }

  .page-about .ab-cert {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-ind,
  .page-about .tabs__tab {
    transition: none;
  }
}
<<<END>>>