.page-about {
  --about-toc-w: 236px;
  --about-soft: #C7D3DE;
  --about-body-width: 660px;
  background: var(--mist);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, var(--sea-900) 0%, var(--sea-800) 62%, #10314f 100%);
  padding: clamp(22px, 4vw, 34px) 0 clamp(48px, 8vw, 92px);
}

.page-about .about-hero__glow {
  position: absolute;
  top: -22%;
  right: -14%;
  width: 74vw;
  height: 74vw;
  max-width: 680px;
  max-height: 680px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 179, 87, 0.30) 0%, rgba(224, 179, 87, 0) 66%);
  pointer-events: none;
}

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

.page-about .about-hero__crumbs .crumbs__link,
.page-about .about-hero__crumbs .crumbs__item {
  color: var(--about-soft);
}

.page-about .about-hero__crumbs .crumbs__link:hover {
  color: var(--gold);
}

.page-about .about-hero__crumbs .crumbs__item[aria-current="page"] {
  color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(28px, 5vw, 52px);
  align-items: start;
}

.page-about .about-hero__kicker {
  color: var(--gold);
  letter-spacing: 0.14em;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.16;
  font-weight: 700;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.85;
  color: rgba(230, 236, 241, 0.84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-hero__ghost {
  color: var(--mist);
  border-color: rgba(230, 236, 241, 0.4);
}

.page-about .about-hero__ghost:hover {
  color: var(--sea-900);
  background: var(--mist);
}

.page-about .about-hero__aside {
  position: relative;
  padding: clamp(22px, 3vw, 30px);
  background: rgba(20, 57, 94, 0.55);
  border-left: 3px solid var(--gold);
}

.page-about .about-hero__asideTitle {
  margin: 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-hero__roles {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-hero__role {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-soft);
}

.page-about .about-hero__role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-hero__asideNote {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(230, 236, 241, 0.7);
}

/* ---------- 主体偏移网格 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  padding-top: clamp(36px, 6vw, 76px);
  padding-bottom: clamp(48px, 8vw, 104px);
}

.page-about .about-toc__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 13px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--gold);
  background: #fff;
}

.page-about .about-toc__idx {
  font-size: 11px;
  color: var(--gold-deep);
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  scroll-margin-top: 108px;
  padding-bottom: clamp(38px, 6vw, 72px);
  margin-bottom: clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section--last {
  border-bottom: 0;
  margin-bottom: clamp(28px, 4vw, 48px);
  padding-bottom: 0;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-section__num {
  font-size: 15px;
  color: var(--gold-deep);
  letter-spacing: 0.06em;
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.6vw, 33px);
  line-height: 1.3;
  font-weight: 700;
  color: var(--sea-900);
  position: relative;
  padding-bottom: 10px;
}

.page-about .about-section__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46px;
  height: 3px;
  background: var(--gold);
}

.page-about .about-section__body {
  margin: 0 0 16px;
  max-width: var(--about-body-width);
  font-size: 16.5px;
  line-height: 1.85;
  color: #22313f;
}

.page-about .about-section__body:last-child {
  margin-bottom: 0;
}

/* ---------- 我们在做的一件事 ---------- */
.page-about .about-focusGrid {
  margin-top: clamp(24px, 4vw, 36px);
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-focusCard {
  --cut: 16px;
  position: relative;
  padding: 22px 22px 24px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--sea-800);
}

.page-about .about-focusCard__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
}

.page-about .about-focusCard__name {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  color: var(--sea-900);
}

.page-about .about-focusCard__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 内容体系目录 ---------- */
.page-about .about-catalog {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-catalog__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-about .about-catalog__item:hover {
  background: rgba(224, 179, 87, 0.09);
  padding-left: 10px;
}

.page-about .about-catalog__num {
  font-size: 13px;
  color: var(--gold-deep);
  padding-top: 3px;
}

.page-about .about-catalog__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--sea-900);
}

.page-about .about-catalog__desc {
  margin: 6px 0 0;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-frame {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-frame img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timelineLayout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 3.4vw, 34px);
  align-items: start;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(224, 179, 87, 0.16) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--mist);
  border: 2px solid var(--gold);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--gold);
  box-shadow: 0 0 0 6px rgba(224, 179, 87, 0.2);
}

.page-about .about-timeline__stage {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
}

.page-about .about-timeline__title {
  margin: 6px 0 6px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--sea-900);
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
  max-width: 30em;
}

.page-about .about-frame--tall {
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-frame--lead {
  margin: 0 0 clamp(22px, 3.4vw, 32px);
}

.page-about .about-teams {
  list-style: none;
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-teams__item {
  background: var(--paper);
  padding: 20px 22px;
  transition: background-color 0.2s var(--ease);
}

.page-about .about-teams__item:hover {
  background: #fff;
}

.page-about .about-teams__name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  color: var(--sea-900);
  padding-left: 14px;
  position: relative;
}

.page-about .about-teams__name::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--foam);
}

.page-about .about-teams__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-rhythm {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 30px);
  padding: 18px 20px;
  background: var(--mist-deep);
  border-left: 3px solid var(--foam);
}

.page-about .about-rhythm__mark {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sea-800);
}

.page-about .about-rhythm__text {
  margin: 0;
  flex: 1 1 260px;
  font-size: 15px;
  line-height: 1.8;
  color: #22313f;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partnerBand {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 4vw, 36px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-partnerBand__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 22px 24px;
  background: var(--sea-900);
}

.page-about .about-partnerBand__num {
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-partnerBand__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* ---------- 资质 ---------- */
.page-about .about-badges {
  margin-top: clamp(22px, 3.4vw, 32px);
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-badge {
  position: relative;
  padding: 22px 22px 24px 26px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
}

.page-about .about-badge::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--gold);
}

.page-about .about-badge__name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  color: var(--sea-900);
}

.page-about .about-badge__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3.4vw, 32px);
  background: rgba(116, 179, 174, 0.3);
  border: 1px solid rgba(116, 179, 174, 0.3);
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--sea-900);
}

.page-about .about-stats__num {
  display: inline-flex;
  align-items: baseline;
  font-size: clamp(28px, 5.2vw, 42px);
  line-height: 1;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-stats__unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--gold);
}

.page-about .about-stats__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--about-soft);
}

.page-about .about-stats__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  scroll-margin-top: 108px;
  padding: clamp(30px, 5vw, 48px) clamp(22px, 4vw, 44px);
  background: linear-gradient(140deg, var(--sea-800) 0%, var(--sea-900) 100%);
  border-left: 4px solid var(--coral);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(230, 236, 241, 0.82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-about .about-cta__ghost {
  color: var(--mist);
  border-color: rgba(230, 236, 241, 0.4);
}

.page-about .about-cta__ghost:hover {
  color: var(--sea-900);
  background: var(--mist);
}

/* ---------- 焦点态 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-partnerBand {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-about .about-timelineLayout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-catalog__item {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 14px;
    padding: 18px 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-toc-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 116px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding: 0;
  }

  .page-about .about-toc__link {
    display: flex;
    white-space: normal;
    padding: 9px 0 9px 14px;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--line-soft);
    font-size: 14px;
    line-height: 1.6;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background: transparent;
    border-left-color: var(--gold);
    color: var(--sea-900);
  }

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

@media (min-width: 1200px) {
  .page-about .about-stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    padding: 24px 16px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-catalog__item,
  .page-about .about-timeline__item::before,
  .page-about .about-teams__item {
    transition: none;
  }
}