.page-about {
  --about-line-x: 34px;
  --about-year-color: rgba(27, 76, 126, .18);
  background: var(--c-mist);
}

.page-about .about-crumbs {
  margin-top: 26px;
}

/* ============ 首屏 ============ */
.page-about .about-origin {
  background: linear-gradient(180deg, var(--c-mist) 0%, #E8ECF1 100%);
  padding-top: 28px;
  padding-bottom: 96px;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about .about-origin__main {
  max-width: 620px;
}

.page-about .about-origin__title {
  margin: 14px 0 22px;
  max-width: 16em;
}

.page-about .about-origin__lede {
  max-width: 34em;
}

.page-about .about-origin__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 96px;
}

.page-about .about-stat__value {
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-deep);
  letter-spacing: -0.02em;
}

.page-about .about-stat__value small {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-rock);
  margin-left: 2px;
  letter-spacing: 0;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--c-rock);
  letter-spacing: .02em;
}

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

.page-about .about-origin__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* ============ 通用章节头 ============ */
.page-about .about-sec-head {
  max-width: 44em;
  margin-bottom: 46px;
}

.page-about .about-sec-head .h2 {
  margin: 12px 0 16px;
  max-width: 22em;
}

/* ============ 时间线 ============ */
.page-about .about-timeline-sec {
  padding-top: 96px;
  padding-bottom: 88px;
}

.page-about .about-line {
  position: relative;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: var(--about-line-x);
  width: 2px;
  background: linear-gradient(180deg, rgba(27, 76, 126, .26), rgba(27, 76, 126, .04));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 56px 60px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(var(--about-line-x) - 7px);
  top: 12px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-signal);
  box-shadow: 0 0 0 4px var(--c-mist), 0 0 0 6px rgba(255, 106, 43, .22);
}

.page-about .about-node__year {
  display: block;
  font-size: clamp(44px, 11vw, 68px);
  font-weight: 800;
  line-height: .92;
  letter-spacing: -0.02em;
  color: var(--about-year-color);
  margin-bottom: 10px;
}

.page-about .about-node__body {
  max-width: 560px;
}

.page-about .about-node__body .h3 {
  margin: 12px 0 10px;
  font-size: 22px;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-timeline__tail {
  margin-top: 8px;
  padding-left: 60px;
  font-size: 15px;
  color: var(--ink-faint);
}

.page-about .about-timeline__tail a {
  color: var(--c-star);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(27, 76, 126, .35);
}

.page-about .about-timeline__tail a:hover {
  color: var(--c-signal);
  text-decoration-color: var(--c-signal);
}

/* ============ 四阶段 ============ */
.page-about .about-phases {
  padding-top: 96px;
  padding-bottom: 96px;
  background: #FFFFFF;
}

.page-about .about-phases__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-about .about-phases__intro .h2 {
  margin: 12px 0 18px;
}

.page-about .about-phases__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-phase {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  align-items: start;
  padding: 22px 24px;
  border-radius: var(--radius-md);
  background: var(--c-mist);
  border-left: 3px solid var(--c-star);
}

.page-about .about-phase__idx {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-signal);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .about-phase__body .h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.page-about .about-phase__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ============ 行业方案扩展 ============ */
.page-about .about-expand {
  padding-top: 96px;
  padding-bottom: 96px;
}

.page-about .about-expand__track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-expand__item {
  position: relative;
  padding: 28px 26px;
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  border: 1px solid rgba(16, 28, 41, .08);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-expand__item--moss { border-top: 4px solid var(--c-moss); }
.page-about .about-expand__item--clay { border-top: 4px solid var(--c-clay); }
.page-about .about-expand__item--teal { border-top: 4px solid var(--c-teal); }

.page-about .about-expand__item .h3 {
  margin: 0;
  font-size: 19px;
}

.page-about .about-expand__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-expand__since {
  margin-top: auto;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--c-rock);
  padding-top: 12px;
  border-top: 1px dashed rgba(16, 28, 41, .12);
}

/* ============ 核验标准 ============ */
.page-about .about-verify {
  padding-top: 96px;
  padding-bottom: 96px;
  background: var(--c-deep);
  color: var(--c-cream);
}

.page-about .about-verify .h2 {
  color: var(--c-cream);
  margin: 14px 0 20px;
}

.page-about .about-verify .eyebrow {
  color: var(--c-signal);
}

.page-about .about-verify .prose {
  color: rgba(246, 242, 233, .82);
  margin: 0 0 18px;
}

.page-about .about-verify__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.page-about .about-verify__cta {
  margin-top: 22px;
  color: var(--c-cream);
  border-color: rgba(246, 242, 233, .5);
}

.page-about .about-verify__cta:hover {
  background: var(--c-signal);
  border-color: var(--c-signal);
  color: #FFFFFF;
}

.page-about .about-verify__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-verify__seal {
  background: rgba(217, 222, 228, .06);
  border: 1px solid rgba(217, 222, 228, .18);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 340px;
}

.page-about .about-seal {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
}

.product .page-about .media-caption,
.page-about .about-verify .media-caption {
  color: rgba(246, 242, 233, .7);
}

/* ============ 团队 ============ */
.page-about .about-team {
  padding-top: 96px;
  padding-bottom: 96px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.page-about .about-team__stat {
  padding: 20px 18px;
  border-radius: var(--radius-md);
  background: #FFFFFF;
  border: 1px solid rgba(16, 28, 41, .08);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-team__value {
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-deep);
  letter-spacing: -0.02em;
}

.page-about .about-team__unit {
  font-size: 12.5px;
  color: var(--c-rock);
  letter-spacing: .04em;
}

.page-about .about-team__detail {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-team__note .h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.page-about .about-team__note p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ============ 荣誉 ============ */
.page-about .about-honors {
  padding-top: 96px;
  padding-bottom: 96px;
  background: #FFFFFF;
}

.page-about .about-honors__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-honor {
  position: relative;
  padding: 30px 26px 26px;
  border-radius: var(--radius-lg);
  background: var(--c-cream);
  border: 1px solid rgba(16, 28, 41, .07);
  display: flex;
  flex-direction: column;
  gap: 12px;
  outline: none;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.page-about .about-honor__seal {
  display: inline-flex;
  width: 48px;
  height: 48px;
  color: var(--c-star);
  margin-bottom: 6px;
}

.page-about .about-honor__seal svg {
  width: 100%;
  height: 100%;
}

.page-about .about-honor__cat {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-rock);
  text-transform: uppercase;
}

.page-about .about-honor .h3 {
  margin: 0;
  font-size: 19px;
}

.page-about .about-honor__hint {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: .04em;
}

.page-about .about-honor__detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .34s var(--ease), opacity .24s var(--ease);
}

.page-about .about-honor:hover .about-honor__detail,
.page-about .about-honor:focus-within .about-honor__detail,
.page-about .about-honor:focus-visible .about-honor__detail {
  max-height: 200px;
  opacity: 1;
  margin-top: 6px;
}

.page-about .about-honor__detail p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(16, 28, 41, .16);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ============ 正在推进 ============ */
.page-about .about-next {
  padding-top: 108px;
  padding-bottom: 128px;
}

.page-about .about-next__head {
  max-width: 30em;
  margin-bottom: 52px;
}

.page-about .about-next__head .h2 {
  margin: 12px 0 0;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 44px;
}

.page-about .about-next__list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  align-items: start;
  max-width: 58em;
}

.page-about .about-next__num {
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-signal);
  letter-spacing: -0.02em;
}

.page-about .about-next__list p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-next__cta {
  margin-top: 68px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .about-origin__stats {
    gap: 18px 52px;
  }

  .page-about .about-expand__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 25px;
  }

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

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

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

  .page-about .about-team__media img {
    max-height: 420px;
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-line-x: 300px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0 80px;
    padding: 0 0 94px 0;
  }

  .page-about .about-node::before {
    left: calc(var(--about-line-x) - 7px);
    top: 24px;
  }

  .page-about .about-node__year {
    text-align: right;
    font-size: clamp(58px, 7vw, 104px);
    margin: 0;
    margin-top: 6px;
  }

  .page-about .about-node__body {
    max-width: 620px;
    padding-top: 10px;
  }

  .page-about .about-node__body .h3 {
    font-size: 24px;
  }

  .page-about .about-timeline__tail {
    padding-left: 340px;
    margin-top: 12px;
  }

  .page-about .about-phases__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 72px;
    align-items: start;
  }

  .page-about .about-verify__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 72px;
  }

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

  .page-about .about-team__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-next__list li {
    grid-template-columns: 72px 1fr;
    gap: 26px;
  }

  .page-about .about-next__num {
    font-size: 38px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-origin__stats {
    gap: 22px 64px;
    margin-top: 52px;
  }

  .page-about .about-stat__value {
    font-size: 40px;
  }

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

  .page-about .about-team__value {
    font-size: 48px;
  }
}

@media (max-width: 719px) {
  .page-about .about-origin {
    padding-bottom: 68px;
  }

  .page-about .about-verify__seal {
    max-width: none;
  }

  .page-about .about-next__cta .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-honor,
  .page-about .about-honor__detail {
    transition: none;
  }
}