.page-about {
  --about-rule: rgba(11, 27, 58, 0.14);
  --about-rule-dark: rgba(0, 229, 255, 0.24);
  --about-gap: clamp(56px, 9vw, 128px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  background: var(--zb-mist);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-crumbs__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  font-size: 13px;
  color: var(--zb-slate);
}

.page-about .about-crumbs__inner a {
  color: var(--zb-body);
  text-decoration: none;
}

.page-about .about-crumbs__inner a:hover {
  color: var(--zb-teal);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 12vw, 132px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.22), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.07) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  color: var(--zb-cyan);
  margin: 0 0 20px;
}

.page-about .about-hero__title {
  margin: 0 0 24px;
  color: var(--zb-white);
  font-size: clamp(34px, 7.4vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--about-rule-dark);
}

.page-about .about-anchors a {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.68);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.25s var(--zb-ease), border-color 0.25s var(--zb-ease);
}

.page-about .about-anchors a:hover,
.page-about .about-anchors a:focus-visible {
  color: var(--zb-orange);
  border-color: var(--zb-orange);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(36px, 6vw, 60px) 0 0;
  background: var(--about-rule-dark);
  border: 1px solid var(--about-rule-dark);
}

.page-about .about-stat {
  background: rgba(11, 27, 58, 0.72);
  padding: 20px 18px 22px;
}

.page-about .about-stat__label {
  margin: 0 0 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--zb-font-head);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1;
  color: var(--zb-cyan);
  letter-spacing: -0.02em;
}

.page-about .about-stat__num span {
  font-size: 14px;
  font-weight: 600;
  margin-left: 4px;
  color: rgba(255, 255, 255, 0.62);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding: var(--about-gap) 0;
}

.page-about .about-origin__inner {
  display: grid;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.page-about .about-origin__title {
  margin: 18px 0 20px;
  max-width: 22ch;
}

.page-about .about-origin__text .zb-text + .zb-text {
  margin-top: 14px;
}

.page-about .about-origin__claim {
  margin: 24px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--zb-orange);
  background: var(--zb-white);
  color: var(--zb-ink);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 500;
}

.page-about .about-origin__figure {
  margin: 0;
  background: var(--zb-deep);
  border: 1px solid var(--about-rule);
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- 服务场景 ---------- */
.page-about .about-scenes-wrap {
  padding: var(--about-gap) 0;
}

.page-about .about-scenes__title {
  margin: 18px 0 16px;
  max-width: 24ch;
}

.page-about .about-scenes__lead {
  max-width: 62ch;
  margin: 0 0 clamp(28px, 5vw, 48px);
}

.page-about .about-scenes {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-scene {
  padding: 26px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-scene__num {
  margin: 0 0 8px;
  font-family: var(--zb-font-head);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--zb-orange);
}

.page-about .about-scene__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 3vw, 24px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--zb-ink);
  letter-spacing: -0.01em;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--zb-body);
}

/* ---------- 版本历程 ---------- */
.page-about .about-history {
  padding: var(--about-gap) 0;
}

.page-about .about-history__head {
  display: grid;
  gap: 18px;
  margin-bottom: clamp(32px, 6vw, 64px);
}

.page-about .about-history__title {
  margin: 18px 0 0;
  max-width: 22ch;
}

.page-about .about-history__intro {
  margin: 0;
  max-width: 56ch;
  color: var(--zb-body);
}

.page-about .about-history__body {
  display: grid;
  gap: clamp(32px, 6vw, 60px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--zb-cyan), var(--zb-orange));
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 34px;
}

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

.page-about .about-timeline__node {
  position: absolute;
  left: -30px;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--zb-white);
  border: 2px solid var(--zb-teal);
  transform: rotate(45deg);
}

.page-about .about-timeline__item--now .about-timeline__node {
  background: var(--zb-orange);
  border-color: var(--zb-orange);
}

.page-about .about-timeline__tag {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--zb-teal);
}

.page-about .about-timeline__item--now .about-timeline__tag {
  color: var(--zb-orange);
}

.page-about .about-timeline__name {
  margin: 0 0 8px;
  color: var(--zb-ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 58ch;
  color: var(--zb-body);
}

.page-about .about-history__figure {
  margin: 0;
  border: 1px solid var(--about-rule);
  background: var(--zb-deep);
}

.page-about .about-history__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-history__caption {
  padding: 12px 18px 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
  background: var(--zb-deep);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-gap) 0;
}

.page-about .about-team__inner {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
}

.page-about .about-team__title {
  margin: 18px 0 18px;
  max-width: 20ch;
}

.page-about .about-team__figure {
  margin: 26px 0 0;
  border: 1px solid var(--about-rule);
  background: var(--zb-mist);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__acc {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-team__acc .zb-acc__item {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-team__acc .zb-acc__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 2px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--zb-font-head);
  font-size: clamp(17px, 2.6vw, 20px);
  font-weight: 700;
  color: var(--zb-ink);
  letter-spacing: -0.01em;
  transition: color 0.25s var(--zb-ease);
}

.page-about .about-team__acc .zb-acc__trigger:hover {
  color: var(--zb-teal);
}

.page-about .about-team__acc .zb-acc__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}

.page-about .about-team__acc .zb-acc__sign::before,
.page-about .about-team__acc .zb-acc__sign::after {
  content: "";
  position: absolute;
  background: var(--zb-orange);
}

.page-about .about-team__acc .zb-acc__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .about-team__acc .zb-acc__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: transform 0.25s var(--zb-ease);
}

.page-about .about-team__acc .zb-acc__trigger[aria-expanded="true"] .zb-acc__sign::after {
  transform: scaleY(0);
}

.page-about .about-team__acc .zb-acc__panel {
  padding: 0 2px 22px;
}

.page-about .about-team__acc .zb-acc__panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--zb-body);
}

/* ---------- 合作与资质 ---------- */
.page-about .about-eco {
  padding: var(--about-gap) 0;
}

.page-about .about-eco__title {
  margin: 18px 0 clamp(30px, 5vw, 48px);
  max-width: 24ch;
}

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

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

.page-about .about-eco__figure {
  background: var(--zb-white);
  padding: clamp(22px, 4vw, 34px);
}

.page-about .about-eco__num {
  display: inline-block;
  font-family: var(--zb-font-head);
  font-size: clamp(38px, 6vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--zb-deep);
}

.page-about .about-eco__unit {
  margin-left: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--zb-orange);
}

.page-about .about-eco__desc {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--zb-body);
}

.page-about .about-eco__certs-title {
  margin: 0 0 16px;
  color: var(--zb-ink);
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-eco__item {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-eco__item-name {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--zb-ink);
}

.page-about .about-eco__item-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--zb-body);
}

.page-about .about-eco__more {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--zb-body);
}

.page-about .about-eco__more a {
  color: var(--zb-teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-eco__more a:hover {
  color: var(--zb-orange);
}

/* ---------- 服务区域与联系 ---------- */
.page-about .about-reach {
  padding: var(--about-gap) 0;
}

.page-about .about-reach__inner {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
}

.page-about .about-marker--onDark .zb-marker__num {
  color: var(--zb-orange);
}

.page-about .about-marker--onDark .zb-marker__line {
  background: var(--about-rule-dark);
}

.page-about .about-marker--onDark .zb-marker__label {
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-reach__title {
  margin: 18px 0 18px;
  color: var(--zb-white);
  max-width: 20ch;
}

.page-about .about-reach__text-body {
  margin: 0;
  max-width: 56ch;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-reach__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-reach__panel {
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--about-rule-dark);
}

.page-about .about-reach__panel-title {
  margin: 0 0 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--zb-cyan);
}

.page-about .about-reach__row {
  padding: 14px 0;
  border-top: 1px solid var(--about-rule-dark);
}

.page-about .about-reach__label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.58);
}

.page-about .about-reach__value {
  display: block;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  text-align: left;
  font-family: var(--zb-font-head);
  font-size: clamp(16px, 2.6vw, 19px);
  font-weight: 700;
  color: var(--zb-white);
  letter-spacing: -0.01em;
  word-break: break-all;
}

.page-about button.about-reach__value {
  cursor: pointer;
  transition: color 0.25s var(--zb-ease);
}

.page-about button.about-reach__value:hover {
  color: var(--zb-cyan);
}

.page-about .about-reach__note {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--about-rule-dark);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scene {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.35fr);
    gap: 24px;
    align-items: start;
    padding: 30px 0;
  }

  .page-about .about-scene__num {
    margin: 4px 0 0;
  }

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

  .page-about .about-history__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }
}

@media (min-width: 980px) {
  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-history__body {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-history__figure {
    position: sticky;
    top: calc(var(--zb-header-h) + 32px);
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

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

  .page-about .about-reach__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(40px, 6vw, 88px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-history__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-anchors a,
  .page-about .about-team__acc .zb-acc__trigger,
  .page-about .about-team__acc .zb-acc__sign::after,
  .page-about button.about-reach__value {
    transition: none;
  }
}