.page-about {
  --about-axis: 72px;
  --about-card: #FCF9F3;
  --about-line-strong: rgba(176, 138, 62, 0.45);
  background: var(--paper);
  color: var(--ink-800);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 56px;
  color: var(--paper);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(31, 74, 115, 0.62) 0%, rgba(14, 31, 51, 0) 62%),
    linear-gradient(158deg, #0E1F33 0%, #0A0D12 100%);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(176, 138, 62, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 138, 62, 0.10) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.55;
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(176, 138, 62, 0) 0%, var(--gold-600) 40%, rgba(176, 138, 62, 0) 100%);
  opacity: 0.5;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .breadcrumbs__link,
.page-about .about-hero .breadcrumbs__current,
.page-about .about-hero .breadcrumbs__sep {
  color: var(--mist);
}
.page-about .about-hero .breadcrumbs__current {
  color: var(--gold-300);
}
.page-about .about-hero .eyebrow {
  margin-top: 22px;
  color: var(--gold-300);
}
.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 52px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  max-width: 20ch;
  color: var(--paper);
}
.page-about .about-hero__lede {
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .about-stat {
  padding: 16px 14px 18px;
  background: rgba(14, 31, 51, 0.9);
}
.page-about .about-stat__num {
  display: block;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--gold-300);
}
.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 区块标题 ---------- */
.page-about .about-head {
  max-width: 720px;
  margin-bottom: 34px;
}
.page-about .about-head h2 {
  margin: 12px 0 14px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.page-about .about-head p {
  font-size: 16px;
  line-height: 1.75;
}
.page-about .about-timeline .about-head h2,
.page-about .about-team .about-head h2,
.page-about .about-coverage .about-head h2 {
  color: var(--ink-800);
}
.page-about .about-timeline .about-head p,
.page-about .about-team .about-head p {
  color: var(--ink-700);
}
.page-about .about-head--onink h2 {
  color: var(--paper);
}
.page-about .about-head--onink p {
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__grid {
  display: grid;
  gap: 36px;
}
.page-about .about-figure {
  margin: 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-m);
  background: var(--ink-700);
}
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-700);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 18px;
  left: var(--about-axis);
  width: 1px;
  background: linear-gradient(to bottom, var(--gold-600) 0%, rgba(176, 138, 62, 0.15) 100%);
}
.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-axis) minmax(0, 1fr);
  gap: 0 16px;
  padding-bottom: 30px;
  outline: none;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 7px;
  left: var(--about-axis);
  width: 11px;
  height: 11px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold-600);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar-deep);
  transform: scale(1.25);
}
.page-about .tl-item:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 4px;
  border-radius: var(--radius-s);
}
.page-about .tl-year {
  padding-right: 14px;
  text-align: right;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--gold-700);
}
.page-about .tl-body {
  padding-top: 2px;
}
.page-about .tl-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cinnabar);
}
.page-about .tl-body h3 {
  margin: 6px 0 8px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink-800);
}
.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-700);
}
.page-about .tl-more {
  border-left: 2px solid var(--about-line-strong);
  padding-left: 12px;
  margin-top: 10px !important;
  font-size: 14px !important;
  color: var(--gold-700) !important;
}

/* ---------- 两版对照 ---------- */
.page-about .about-versions {
  color: var(--paper);
  background: linear-gradient(180deg, #16324F 0%, #0E1F33 100%);
}
.page-about .about-versions__head {
  display: grid;
  gap: 20px;
  margin-bottom: 30px;
}
.page-about .about-versions__head .about-head {
  margin-bottom: 0;
}
.page-about .cmp-svg {
  width: 180px;
  max-width: 100%;
  height: auto;
  align-self: start;
}
.page-about .cmp {
  display: grid;
  gap: 16px;
}
.page-about .cmp-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(10, 13, 18, 0.35);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  outline: none;
}
.page-about .cmp-card:hover,
.page-about .cmp-card:focus-within {
  border-color: var(--gold-300);
  background: rgba(31, 74, 115, 0.42);
  box-shadow: var(--shadow-card);
}
.page-about .cmp-card:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 3px;
}
.page-about .cmp-card .tag {
  color: var(--gold-300);
  border-color: var(--about-line-strong);
}
.page-about .cmp-card h3 {
  margin: 12px 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .cmp-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-versions__points {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .about-versions__points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}
.page-about .about-versions__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--gold-600);
}
.page-about .about-versions__points strong {
  color: var(--gold-300);
  font-weight: 500;
}
.page-about .about-versions__cta {
  margin: 28px 0 0;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 18px;
}
.page-about .team-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-m);
  background: var(--about-card);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  outline: none;
}
.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--gold-600);
  background: #FFFFFF;
  box-shadow: 0 16px 30px -22px rgba(10, 13, 18, 0.75);
}
.page-about .team-card:focus-visible {
  outline: 2px solid var(--gold-600);
  outline-offset: 3px;
}
.page-about .team-card .tag {
  color: var(--gold-700);
  border-color: var(--about-line-strong);
  background: transparent;
}
.page-about .team-card h3 {
  margin: 14px 0 12px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.42;
  color: var(--ink-800);
}
.page-about .team-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}
.page-about .team-card li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-700);
}
.page-about .team-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--gold-600);
  border-radius: 2px;
  transition: background var(--dur) var(--ease);
}
.page-about .team-card:hover li::before,
.page-about .team-card:focus-within li::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar-deep);
}
.page-about .about-team__figure {
  margin-top: 32px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-team__figure .media-frame__caption {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-300);
  border-top: 1px solid var(--line);
}

/* ---------- 维护节奏 ---------- */
.page-about .about-cadence {
  color: var(--paper);
  background: linear-gradient(180deg, #0A0D12 0%, #0E1F33 100%);
}
.page-about .rhythm {
  display: grid;
  gap: 1px;
  margin-top: 8px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .rhythm__item {
  padding: 24px 20px 26px;
  background: rgba(22, 50, 79, 0.62);
}
.page-about .rhythm__num {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 34px;
  line-height: 1;
  color: var(--gold-300);
}
.page-about .rhythm__num small {
  margin-left: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .rhythm__item h3 {
  margin: 14px 0 8px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.42;
  color: var(--paper);
}
.page-about .rhythm__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .rhythm__item .rhythm__num {
  color: var(--gold-300);
}
.page-about .about-cadence__links {
  margin: 26px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  background: var(--paper);
}
.page-about .coverage-grid {
  display: grid;
  gap: 30px;
}
.page-about .coverage-text h2 {
  margin: 12px 0 14px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.3;
  color: var(--ink-800);
}
.page-about .coverage-text > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
}
.page-about .coverage-text .contact-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--about-line-strong);
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-s);
  overflow: hidden;
}
.page-about .coverage-text .contact-list__item {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 12px 14px;
  background: var(--about-card);
}
.page-about .coverage-text .contact-list__label {
  min-width: 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-700);
}
.page-about .coverage-text .contact-list__value {
  font-size: 15px;
  color: var(--ink-800);
}
.page-about .coverage-text__more {
  margin: 16px 0 0;
}
.page-about .about-inline-link {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--cinnabar);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--cinnabar-deep);
  border-color: var(--cinnabar-deep);
}
.page-about .coverage-figure {
  margin: 0;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}
.page-about .coverage-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .coverage-figure .media-frame__caption {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-300);
  border-top: 1px solid var(--line);
}

/* ---------- 收口 ---------- */
.page-about .about-next {
  color: var(--paper);
  background: linear-gradient(140deg, #16324F 0%, #0A0D12 100%);
}
.page-about .about-next__inner {
  display: grid;
  gap: 24px;
}
.page-about .about-next h2 {
  margin: 12px 0 12px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.32;
  color: var(--paper);
}
.page-about .about-next p {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .cmp {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .page-about .rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-axis: 128px;
  }
  .page-about .about-hero {
    padding: 64px 0 80px;
  }
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }
  .page-about .team-card:nth-child(2) {
    margin-top: 34px;
  }
  .page-about .team-card:nth-child(3) {
    margin-top: 68px;
  }
  .page-about .about-versions__head {
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: center;
    gap: 32px;
  }
  .page-about .cmp-svg {
    justify-self: end;
  }
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }
  .page-about .about-timeline__figure {
    position: sticky;
    top: 116px;
  }
  .page-about .tl-item {
    padding-bottom: 38px;
  }
  .page-about .tl-year {
    font-size: 26px;
    padding-right: 20px;
  }
  .page-about .tl-body h3 {
    font-size: 22px;
  }
  .page-about .coverage-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-versions__points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 32px;
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .tl-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0 !important;
    padding-top: 0;
    padding-bottom: 0;
    border-left-width: 0;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease), padding var(--dur) var(--ease), border-left-width var(--dur) var(--ease);
  }
  .page-about .tl-item:hover .tl-more,
  .page-about .tl-item:focus-within .tl-more {
    max-height: 180px;
    opacity: 1;
    margin-top: 10px !important;
    padding-top: 2px;
    padding-bottom: 2px;
    border-left-width: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item::before,
  .page-about .tl-more,
  .page-about .cmp-card,
  .page-about .team-card,
  .page-about .team-card li::before,
  .page-about .about-inline-link {
    transition: none !important;
  }
  .page-about .tl-item:hover::before,
  .page-about .tl-item:focus-within::before {
    transform: none;
  }
}
<<<END>>>