.page-about {
  --about-gap: 20px;
  --about-edge: 1px solid var(--c-rail);
  --about-soft: rgba(92, 225, 212, 0.12);
  background: var(--c-ink);
  color: var(--c-mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 18px;
}

.page-about .breadcrumbs {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
  opacity: 0.82;
}

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

.page-about .crumb:hover {
  color: var(--c-cyan);
}

.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--c-rail);
}

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 36px 0 52px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(142deg, var(--c-orbit) 0%, var(--c-ink) 64%);
  clip-path: polygon(0 0, 100% 0, 100% 84%, 0 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__kicker {
  margin: 0 0 18px;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__panel {
  padding: 22px 20px;
  background: var(--c-orbit);
  border: var(--about-edge);
  box-shadow: 8px 8px 0 rgba(92, 225, 212, 0.08);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-hero__panel-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .about-hero__stats {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-hero__stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-rail);
}

.page-about .about-hero__stats > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-hero__stats dt {
  font-size: 13px;
  color: var(--c-mist);
}

.page-about .about-hero__stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: #fff;
}

.page-about .about-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-cyan);
  margin-right: 4px;
}

.page-about .about-hero__panel-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
  opacity: 0.78;
}

.page-about .section {
  padding: 52px 0;
}

.page-about .about-head {
  margin-bottom: 30px;
  max-width: 72ch;
}

.page-about .about-head .section__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .about-head .section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: #fff;
}

.page-about .about-head .section__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
  opacity: 0.88;
}

.page-about .about-head--ink .section__title {
  color: var(--c-black);
}

.page-about .about-head--ink .section__lede {
  color: #2b3540;
  opacity: 1;
}

.page-about .about-head--ink .section__index {
  color: #0f7d74;
}

/* 团队分工 */
.page-about .about-team__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-team__cards {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  padding: 20px 18px;
  background: var(--c-orbit);
  border: var(--about-edge);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: var(--c-cyan);
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: #fff;
}

.page-about .about-role__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--c-signal);
  border: 1px solid var(--c-signal);
  padding: 2px 8px;
  white-space: nowrap;
}

.page-about .about-role__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-mist);
  opacity: 0.9;
}

.page-about .about-team__figure,
.page-about .about-timeline__figure,
.page-about .about-reach__figure {
  margin: 0;
  border: var(--about-edge);
  background: var(--c-orbit);
  overflow: hidden;
}

.page-about .about-team__figure .media-frame__img,
.page-about .about-timeline__figure .media-frame__img,
.page-about .about-reach__figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure__cap {
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-mist);
  opacity: 0.75;
  border-top: 1px solid var(--c-rail);
}

/* 时间轴 */
.page-about .about-timeline__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-timeline__rail {
  align-self: start;
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
  opacity: 0.6;
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-rail-link {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
  color: var(--c-cyan);
  text-decoration: none;
  border: 1px solid var(--c-rail);
  background: var(--c-orbit);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  border-color: var(--c-cyan);
  background: rgba(92, 225, 212, 0.14);
}

.page-about .about-timeline__body {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--c-rail);
  display: grid;
  gap: 18px;
}

.page-about .about-phase {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--c-orbit);
  border: var(--about-edge);
}

.page-about .about-phase::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-cyan);
}

.page-about .about-phase:hover::before {
  background: var(--c-cyan);
  box-shadow: 0 0 10px rgba(92, 225, 212, 0.7);
}

.page-about .about-phase__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-signal);
}

.page-about .about-phase__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  color: #fff;
}

.page-about .about-phase__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
  opacity: 0.9;
}

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

/* 流程 */
.page-about .about-flow__list {
  display: grid;
  gap: 10px;
}

.page-about .about-step {
  border: var(--about-edge);
  background: var(--c-orbit);
  transition: border-color 0.2s var(--ease);
}

.page-about .about-step[open] {
  border-color: var(--c-cyan);
}

.page-about .about-step__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-step__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-step__summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .about-step__index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--c-cyan);
  border: 1px solid var(--c-rail);
  padding: 3px 7px;
}

.page-about .about-step__label {
  flex: 1;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.page-about .about-step__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-signal);
}

.page-about .about-step[open] .about-step__summary::after {
  content: "–";
}

.page-about .about-step__body {
  padding: 0 18px 18px 18px;
  border-top: 1px solid var(--c-rail);
}

.page-about .about-step__body p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--c-mist);
  opacity: 0.9;
}

/* 服务覆盖 */
.page-about .about-reach__grid {
  display: grid;
  gap: 24px;
  margin-bottom: 28px;
}

.page-about .about-reach__copy .section__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .about-reach__copy .section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: #fff;
}

.page-about .about-reach__copy .section__lede {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
  opacity: 0.88;
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-reach__scenes {
  display: grid;
  gap: 12px;
}

.page-about .about-scene {
  padding: 16px 18px;
  border: 1px solid var(--c-rail);
  border-left: 3px solid var(--c-moss);
  background: rgba(14, 34, 56, 0.6);
}

.page-about .about-scene__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: #fff;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-mist);
  opacity: 0.88;
}

/* 协作与自查：浅色带 */
.page-about .about-eco {
  background: var(--c-paper);
  color: var(--c-black);
  border-top: 1px solid var(--c-sand);
  border-bottom: 1px solid var(--c-sand);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-eco__card {
  padding: 20px 18px;
  background: #fff;
  border: 1px solid var(--c-sand);
  box-shadow: 6px 6px 0 rgba(11, 15, 20, 0.06);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-eco__card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 10px 0 rgba(11, 15, 20, 0.1);
}

.page-about .about-eco__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--c-black);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2b3540;
}

/* 长期服务 */
.page-about .about-trust__grid {
  display: grid;
  gap: 14px;
  margin-bottom: 34px;
}

.page-about .about-reason {
  position: relative;
  padding: 22px 18px 18px;
  border: var(--about-edge);
  background: linear-gradient(160deg, rgba(14, 34, 56, 0.95), rgba(7, 17, 31, 0.95));
}

.page-about .about-reason__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-signal);
}

.page-about .about-reason__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: #fff;
}

.page-about .about-reason__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
  opacity: 0.9;
}

/* 结尾入口 */
.page-about .about-cta__inner {
  padding: 26px 20px;
  border: 1px solid var(--c-cyan);
  background: linear-gradient(120deg, rgba(92, 225, 212, 0.14), rgba(7, 17, 31, 0.9) 62%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 900;
  color: #fff;
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
}

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

@media (min-width: 620px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 92px;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-rail-link {
    text-align: center;
  }

  .page-about .about-reach__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: 32px;
  }

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

  .page-about .about-timeline__body {
    padding-left: 26px;
    gap: 20px;
  }

  .page-about .about-phase {
    padding: 22px 24px 24px;
  }
}

@media (min-width: 1080px) {
  .page-about .section {
    padding: 68px 0;
  }

  .page-about .about-hero {
    padding: 56px 0 76px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: 52px;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: 36px;
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 92px;
  }

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

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

  .page-about .about-cta__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 28px;
    padding: 34px 32px;
  }

  .page-about .about-cta__title {
    grid-column: 1;
  }

  .page-about .about-cta__text {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-about .about-cta__links {
    grid-column: 2;
    grid-row: 1 / span 2;
    justify-content: flex-end;
    max-width: 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-eco__card,
  .page-about .about-rail-link {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-eco__card:hover {
    transform: none;
  }
}