.page-about {
  --about-line: rgba(20, 48, 107, .14);
  --about-soft: rgba(26, 29, 36, .68);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  line-height: 1.28;
  margin: 0 0 14px;
  color: var(--navy-900);
}

.page-about h3 {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.45;
  margin: 0;
  color: var(--navy-800);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--navy-600);
  margin: 0 0 12px;
}

.page-about .section {
  padding: 44px 0;
}

.page-about .section__head {
  max-width: 720px;
  margin-bottom: 26px;
}

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

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 220ms var(--ease), background 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .btn:hover {
  transform: translateY(-2px);
}

.page-about .btn--gold {
  background: var(--gold);
  color: var(--navy-900);
}

.page-about .btn--gold:hover {
  background: var(--gold-pale);
}

.page-about .btn--navy {
  background: var(--navy-800);
  color: var(--paper);
}

.page-about .btn--navy:hover {
  background: var(--navy-600);
}

.page-about .btn--ghost-light {
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(251, 247, 239, .5);
}

.page-about .btn--ghost-light:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .btn--ghost {
  background: transparent;
  color: var(--navy-900);
  border: 1px solid rgba(10, 27, 61, .3);
}

.page-about .btn--ghost:hover {
  border-color: var(--navy-900);
}

.page-about .tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}

.page-about .tag--gold {
  background: var(--gold);
  color: var(--navy-900);
}

.page-about .tag--wine {
  background: var(--wine);
  color: var(--paper);
}

/* 首屏 */
.page-about .about-hero {
  background: var(--grad-sky);
  color: var(--paper);
  padding: 26px 0 44px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(251, 247, 239, .7);
  margin-bottom: 22px;
}

.page-about .breadcrumbs a {
  color: rgba(251, 247, 239, .92);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: 34px;
  line-height: 1.18;
  margin: 0 0 16px;
  letter-spacing: .01em;
}

.page-about .about-hero .eyebrow {
  color: var(--gold);
}

.page-about .about-hero__lede {
  font-size: 16px;
  line-height: 1.82;
  color: rgba(251, 247, 239, .86);
  margin: 0 0 24px;
  max-width: 50ch;
}

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

.page-about .about-facts {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid rgba(232, 180, 74, .55);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  box-shadow: 0 26px 52px -34px rgba(10, 27, 61, .75);
}

.page-about .about-facts__title {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--navy-600);
  margin: 0 0 12px;
}

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

.page-about .about-facts__row {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--about-line);
}

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

.page-about .about-facts__row dt {
  font-size: 13px;
  color: var(--about-soft);
  flex: 0 0 auto;
}

.page-about .about-facts__row dd {
  margin: 0;
  flex: 1 1 58%;
  text-align: right;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy-900);
  line-height: 1.6;
}

.page-about .about-facts__row dd .tag {
  margin-right: 6px;
  padding: 2px 10px;
  font-size: 12px;
}

/* 通用图 */
.page-about .figure {
  margin: 0 0 30px;
}

.page-about .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--mist);
}

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

.page-about .figure__caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-soft);
  margin-top: 10px;
}

/* 时间带 */
.page-about .about-timeline {
  display: grid;
  gap: 26px;
}

.page-about .about-index {
  background: var(--mist);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--navy-600);
  margin: 0 0 10px;
}

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: var(--paper);
  border: 1px solid var(--about-line);
  color: var(--navy-800);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .about-index__link::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  flex: 0 0 auto;
}

.page-about .about-index__link:hover {
  border-color: var(--gold);
}

.page-about .about-era-list {
  position: relative;
  display: grid;
  gap: 28px;
  padding-left: 22px;
  border-left: 2px solid var(--about-line);
}

.page-about .about-era {
  position: relative;
}

.page-about .about-era::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .about-era--current::before {
  background: var(--wine);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 6px rgba(232, 180, 74, .45);
}

.page-about .about-era__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
}

.page-about .about-era__year {
  font-family: var(--font-serif);
  font-size: 40px;
  line-height: 1;
  color: var(--navy-900);
}

.page-about .about-era__meta {
  display: grid;
  gap: 6px;
  justify-items: start;
  flex: 1 1 220px;
}

.page-about .about-era__meta .tag {
  justify-self: start;
}

.page-about .about-era__text {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(26, 29, 36, .84);
  margin: 14px 0 0;
  max-width: 60ch;
}

.page-about .disclosure__trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-line);
  background: transparent;
  color: var(--navy-800);
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .disclosure__trigger:hover {
  border-color: var(--gold);
  background: var(--mist);
}

.page-about .disclosure__sign {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gold);
}

.page-about .disclosure__sign::before {
  content: "+";
}

.page-about .disclosure__trigger[aria-expanded="true"] .disclosure__sign::before {
  content: "−";
}

.page-about .disclosure__panel {
  margin-top: 14px;
  padding: 14px 18px;
  background: var(--mist);
  border-radius: var(--radius-md);
}

.page-about .disclosure__panel ul {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(26, 29, 36, .82);
}

.page-about .about-band {
  background: var(--grad-sky);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid rgba(232, 180, 74, .35);
}

.page-about .about-band p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}

/* 本季变化 */
.page-about .section--mist {
  background: var(--mist);
}

.page-about .about-changes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-change {
  background: var(--paper);
  border: 1px solid rgba(20, 48, 107, .1);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
}

.page-about .about-change__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: .06em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-about .about-change h3 {
  margin-bottom: 8px;
}

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

/* 服务范围 */
.page-about .about-range {
  display: grid;
  gap: 26px;
}

.page-about .about-range__text p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(26, 29, 36, .84);
  margin: 0 0 16px;
}

.page-about .about-range__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-range__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-range__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-range__list strong {
  color: var(--navy-800);
}

.page-about .about-range .figure {
  margin: 0;
}

.page-about .about-range .figure__frame {
  border: 2px solid transparent;
  transition: border-color 220ms var(--ease);
}

.page-about .about-range .figure:hover .figure__frame {
  border-color: var(--gold);
}

/* 团队 */
.page-about .section--navy {
  background: var(--navy-900);
  color: var(--paper);
}

.page-about .section--navy h2 {
  color: var(--paper);
}

.page-about .section--navy .section__lede {
  color: rgba(251, 247, 239, .78);
}

.page-about .section--navy .eyebrow {
  color: var(--gold);
}

.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team .figure {
  margin: 0;
}

.page-about .about-team .figure__frame {
  background: rgba(251, 247, 239, .06);
  border: 1px solid rgba(232, 180, 74, .3);
}

.page-about .about-team .figure__caption {
  color: rgba(251, 247, 239, .66);
}

.page-about .about-team__item {
  padding: 18px 0;
  border-top: 1px solid rgba(251, 247, 239, .18);
}

.page-about .about-team__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-team__name {
  color: var(--paper);
  margin-bottom: 8px;
}

.page-about .about-team__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(251, 247, 239, .8);
}

/* 版本号与保障 */
.page-about .about-twocol {
  display: grid;
  gap: 22px;
}

.page-about .about-ver {
  background: var(--navy-900);
  color: var(--paper);
  border: 1px solid rgba(232, 180, 74, .35);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
}

.page-about .about-ver .eyebrow {
  color: var(--gold);
}

.page-about .about-ver h2 {
  color: var(--paper);
  font-size: 26px;
  margin-bottom: 6px;
}

.page-about .about-ver__code {
  font-family: var(--font-mono);
  font-size: 60px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--gold);
  margin: 8px 0 16px;
}

.page-about .about-ver p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(251, 247, 239, .84);
  margin: 0 0 12px;
}

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

.page-about .about-ops > p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(26, 29, 36, .84);
  margin: 0;
}

.page-about .about-ops__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-ops__metric {
  background: var(--mist);
  border-radius: var(--radius-md);
  padding: 16px;
}

.page-about .about-ops__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--navy-800);
  letter-spacing: .02em;
}

.page-about .about-ops__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-soft);
}

/* 收尾 */
.page-about .about-cta {
  background: var(--gold);
  color: var(--navy-900);
  padding: 40px 0;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.page-about .about-cta h2 {
  color: var(--navy-900);
  font-size: 26px;
  margin-bottom: 12px;
}

.page-about .about-cta p {
  font-size: 16px;
  line-height: 1.85;
  margin: 0 0 20px;
  max-width: 62ch;
  color: rgba(10, 27, 61, .86);
}

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

.page-about .about-cta .btn--ghost {
  color: var(--navy-900);
  border-color: rgba(10, 27, 61, .35);
}

.page-about .about-cta .btn--ghost:hover {
  border-color: var(--navy-900);
  background: rgba(251, 247, 239, .35);
}

@media (min-width: 768px) {
  .page-about h2 {
    font-size: 32px;
  }

  .page-about .section {
    padding: 60px 0;
  }

  .page-about .about-hero {
    padding: 34px 0 56px;
  }

  .page-about .about-hero h1 {
    font-size: 46px;
  }

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

  .page-about .about-era__year {
    font-size: 56px;
  }

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

  .page-about .about-change:nth-child(even) {
    margin-top: 22px;
  }

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

  .page-about .about-cta {
    padding: 54px 0;
  }
}

@media (min-width: 1024px) {
  .page-about .section {
    padding: 76px 0;
  }

  .page-about .about-hero {
    padding: 40px 0 68px;
  }

  .page-about .about-hero h1 {
    font-size: 58px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-timeline {
    grid-template-columns: 4fr 8fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding: 22px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 6px;
  }

  .page-about .about-index__link {
    width: 100%;
    justify-content: flex-start;
    background: transparent;
    border-color: transparent;
    padding: 10px 12px;
  }

  .page-about .about-index__link:hover {
    background: var(--paper);
    border-color: var(--gold);
  }

  .page-about .about-era-list {
    gap: 40px;
    padding-left: 28px;
  }

  .page-about .about-era::before {
    left: -36px;
  }

  .page-about .about-era__year {
    font-size: 64px;
  }

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

  .page-about .about-range {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-team {
    grid-template-columns: 4fr 8fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-twocol {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-ver {
    padding: 30px 26px;
  }

  .page-about .about-cta {
    padding: 64px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .btn,
  .page-about .about-index__link,
  .page-about .disclosure__trigger,
  .page-about .about-range .figure__frame {
    transition: none;
  }

  .page-about .btn:hover {
    transform: none;
  }
}
<<<END>>>