.page-about {
  --about-rail-w: 240px;
  --about-gold-soft: rgba(192, 138, 46, 0.16);
  background-color: var(--paper);
  background-image: radial-gradient(1100px 460px at 6% -8%, rgba(192, 138, 46, 0.11), transparent 62%);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-progress {
  position: fixed;
  top: 0;
  right: 0;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--gold-hi), var(--gold));
  z-index: 60;
  pointer-events: none;
}

/* 面包屑 */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--font-index);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-about .crumbs__link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}
.page-about .crumbs__link:hover,
.page-about .crumbs__link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}
.page-about .crumbs__sep {
  color: var(--line-2);
}
.page-about .crumbs__item {
  color: var(--ink);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 6vw, 76px);
}
.page-about .about-hero__lead {
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
  align-content: start;
}
.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.05rem, 6.6vw, 3.9rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  max-width: 18ch;
}
.page-about .about-hero__lede {
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 42ch;
}
.page-about .about-hero__media {
  margin: 0;
}

/* 数据锚点 */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: clamp(16px, 3vw, 28px);
  padding-top: clamp(14px, 2.4vw, 22px);
  border-top: 1px solid var(--line);
}
.page-about .about-facts__item {
  display: grid;
  gap: 8px;
}
.page-about .about-facts__num {
  font-family: var(--font-index);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--gold);
}
.page-about .about-facts__label {
  font-size: 0.875rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
}
.page-about .about-facts--light .about-facts__num {
  color: var(--gold-hi);
}
.page-about .about-facts--light .about-facts__label {
  color: rgba(245, 237, 223, 0.74);
}

/* 媒体容器兜底 */
.page-about .media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
}
.page-about .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .media__caption {
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* 区块通用 */
.page-about .section {
  padding-block: clamp(48px, 8vw, 96px);
}
.page-about .section__title {
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.32;
}
.page-about .section__lede {
  margin: 0;
  max-width: 62ch;
  color: var(--ink-soft);
  line-height: 1.85;
}
.page-about .index-tag {
  display: block;
  margin: 0 0 14px;
  font-family: var(--font-index);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

/* 年表区 */
.page-about .about-timeline {
  border-top: 1px solid var(--line);
  padding-top: clamp(40px, 7vw, 80px);
}
.page-about .about-timeline__frame {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}
.page-about .about-rail__kicker {
  margin-bottom: 20px;
}
.page-about .about-rail__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}
.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--gold-hi) 52%, rgba(192, 138, 46, 0.18));
}
.page-about .about-rail__item {
  position: relative;
  padding-left: 30px;
}
.page-about .about-rail__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--paper);
  box-shadow: 0 0 0 4px var(--paper);
}
.page-about .about-rail__link {
  display: grid;
  gap: 4px;
  text-decoration: none;
  color: inherit;
}
.page-about .about-rail__year {
  font-family: var(--font-index);
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  transition: color 180ms var(--ease);
}
.page-about .about-rail__note {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .about-rail__link:hover .about-rail__year,
.page-about .about-rail__link:focus-visible .about-rail__year {
  color: var(--gold);
}
.page-about .about-rail__hint {
  margin: 24px 0 0;
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-about .about-story__title {
  margin-top: 0;
}
.page-about .about-chapter {
  padding-top: clamp(30px, 4.6vw, 52px);
  scroll-margin-top: 132px;
}
.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--line);
}
.page-about .about-chapter__year {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: clamp(2.3rem, 7.5vw, 3.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}
.page-about .about-chapter__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  line-height: 1.4;
}
.page-about .about-chapter__text {
  margin: 0 0 14px;
  max-width: 60ch;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-chapter__list {
  margin: 0;
  padding-left: 1.15em;
  max-width: 60ch;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-chapter__list li {
  margin-bottom: 8px;
}
.page-about .about-chapter__note {
  margin: 0;
  padding: 16px 20px;
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--paper-2);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* 福州中心 */
.page-about .about-hub {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hub__head {
  max-width: 68ch;
}
.page-about .about-hub__grid {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  margin-top: clamp(26px, 4vw, 42px);
}
.page-about .about-hub__cell {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3.2vw, 30px);
  background: var(--paper);
  border: 1px solid var(--line);
}
.page-about .about-hub__num {
  margin: 0;
  font-family: var(--font-index);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-about .about-hub__cellTitle {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1875rem;
  line-height: 1.4;
}
.page-about .about-hub__cellText {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-hub__facts {
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: clamp(22px, 3.2vw, 32px);
  border-top: 1px solid var(--line-2);
}

/* 三地团队 */
.page-about .about-split__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}
.page-about .about-split__intro {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-about .about-split__media {
  margin-top: 8px;
}
.page-about .about-split__console {
  min-width: 0;
}
.page-about .about-split__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-split__tabs .tab {
  font-family: var(--font-index);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-split__tabs .tab:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.page-about .about-split__tabs .tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.page-about .about-split__tabs .tab:focus-visible {
  outline: 2px solid var(--gold-hi);
  outline-offset: 3px;
}
.page-about .about-split__panels {
  margin-top: clamp(18px, 3vw, 26px);
}
.page-about .tabpanel[hidden] {
  display: none;
}
.page-about .about-city {
  display: grid;
  gap: 12px;
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--paper-2);
  border-left: 4px solid var(--gold);
}
.page-about .about-city--cinnabar {
  border-left-color: var(--cinnabar);
}
.page-about .about-city--celadon {
  border-left-color: var(--celadon);
}
.page-about .about-city__meta {
  margin: 0;
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.page-about .about-city__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.6vw, 1.4rem);
  line-height: 1.4;
}
.page-about .about-city__text {
  margin: 0;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-city__list {
  margin: 0;
  padding-left: 1.15em;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 协作与认可 */
.page-about .about-partners__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3.4vw, 30px) 0;
}
.page-about .about-partners__row {
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}
.page-about .about-partners__text {
  margin: 0;
  max-width: 64ch;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 规格档案 */
.page-about .about-archive {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-archive__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}
.page-about .about-archive__media {
  margin: 0;
}
.page-about .about-archive__list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-archive__item {
  position: relative;
  padding-left: 26px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-archive__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 1px;
  background: var(--gold);
}

/* 长期合作 */
.page-about .about-loyal__frame {
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--radius-lg);
  background: var(--indigo);
  color: var(--paper);
}
.page-about .about-loyal__frame .index-tag {
  color: var(--gold-hi);
}
.page-about .about-loyal__title {
  color: var(--paper);
  max-width: 26ch;
}
.page-about .about-loyal__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 3.4vw, 34px);
}
.page-about .about-loyal__text {
  margin: 0;
  max-width: 56ch;
  line-height: 1.9;
  color: rgba(245, 237, 223, 0.86);
}

/* 下一步 */
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 34px);
  padding: clamp(26px, 4.4vw, 48px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-2);
  background: linear-gradient(120deg, var(--paper-2), var(--paper) 68%);
}
.page-about .about-cta__body {
  max-width: 62ch;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta__actions .btn {
  text-decoration: none;
}

/* 响应式 */
@media (min-width: 700px) {
  .page-about .about-hub__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  }
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 34ch;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .about-split__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
  }
  .page-about .about-loyal__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline__frame {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 116px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crumbs__link,
  .page-about .about-rail__year,
  .page-about .about-split__tabs .tab {
    transition: none;
  }
}
</main>