.page-about {
  --about-cut: 14px;
  --about-line: 1px solid rgba(56, 67, 76, .14);
  --about-line-dark: 1px solid rgba(168, 192, 199, .26);
  background: var(--shell);
  color: var(--rock);
  overflow-x: hidden;
}

.page-about p {
  margin: 0 0 1em;
  line-height: 1.75;
}

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

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 3vw, 24px) 0 clamp(44px, 7vw, 82px);
  color: var(--sand);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(91, 122, 140, .48) 0%, rgba(11, 34, 57, 0) 62%),
    radial-gradient(90% 70% at 6% 104%, rgba(255, 107, 74, .18) 0%, rgba(11, 34, 57, 0) 58%),
    var(--ink-deep);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -160px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, rgba(168, 192, 199, .16) 0 1px, rgba(168, 192, 199, 0) 1px 46px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coral) 0%, var(--coral) 22%, var(--clay) 22%, var(--clay) 44%, rgba(168, 192, 199, .4) 44%, rgba(168, 192, 199, .4) 100%);
}

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

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 34px);
  margin-top: clamp(20px, 4vw, 32px);
}

.page-about .about-hero__label {
  color: var(--coral-soft);
  margin: 0 0 12px;
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 6.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--sand);
}

.page-about .about-hero__lead {
  max-width: 44ch;
  font-size: clamp(15px, 2.1vw, 17px);
  color: rgba(242, 237, 228, .82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero__side {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-chip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px 16px;
  background: rgba(18, 58, 90, .78);
  border: var(--about-line-dark);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .about-chip--coral {
  background: rgba(255, 107, 74, .14);
  border-color: rgba(255, 161, 132, .5);
}

.page-about .about-chip__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--coral);
}

.page-about .about-chip--coral .about-chip__num {
  color: var(--coral-soft);
}

.page-about .about-chip__text {
  font-size: 12px;
  line-height: 1.45;
  color: rgba(242, 237, 228, .74);
}

/* ---------- 主体：左索引 + 右叙事 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  padding-block: clamp(30px, 5vw, 62px);
}

.page-about .about-index {
  padding: 16px 0 4px;
  border-top: 2px solid var(--coral);
  border-bottom: var(--about-line);
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sonar);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--coral-text);
  border-bottom-color: var(--coral);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: 96px;
  padding-top: clamp(22px, 3vw, 32px);
  border-top: var(--about-line);
  min-width: 0;
}

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

.page-about .about-sec__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sonar);
}

.page-about .about-sec__title {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink-deep);
  max-width: 22ch;
}

.page-about .about-sec__lead {
  max-width: 46ch;
  color: var(--rock);
}

.page-about .about-sec__prose {
  max-width: 46ch;
}

.page-about .about-sec__foot {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--clay);
  font-size: 14px;
  color: var(--rock);
  max-width: 54ch;
}

/* ---------- 我们是谁 ---------- */
.page-about .about-who {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-who__card {
  padding: 16px 16px 18px;
  background: var(--sand);
  border-left: 3px solid var(--mist);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-who__card:hover {
  background: var(--shell);
  border-left-color: var(--coral);
}

.page-about .about-who__title {
  margin: 10px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-who__card p {
  font-size: 14px;
  color: var(--rock);
}

/* ---------- 流程 ---------- */
.page-about .about-flow__grid {
  display: grid;
  gap: clamp(20px, 4vw, 32px);
  align-items: start;
}

.page-about .about-steps {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-steps__item {
  position: relative;
  padding: 12px 14px 14px 14px;
  background: var(--shell);
  border: var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-steps__item:hover {
  border-color: rgba(255, 107, 74, .55);
}

.page-about .about-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--coral-text);
}

.page-about .about-steps__title {
  margin: 4px 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 14px;
  color: var(--rock);
}

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

.page-about .about-figure .media-frame {
  border: var(--about-line);
}

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

.page-about .about-figure .media-caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--sonar);
}

/* ---------- 团队 ---------- */
.page-about .about-tabs {
  margin-top: 18px;
}

.page-about .about-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .about-tabs__tab {
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--rock);
  background: var(--sand);
  border: 1px solid rgba(56, 67, 76, .18);
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tabs__tab:hover {
  border-color: var(--coral);
  color: var(--coral-text);
}

.page-about .about-tabs__tab[aria-selected="true"],
.page-about .about-tabs__tab.is-active {
  background: var(--ink-deep);
  border-color: var(--ink-deep);
  color: var(--sand);
}

.page-about .about-tabs__panel {
  padding: 16px 16px 18px;
  background: var(--sand);
  border-left: 3px solid var(--coral);
  max-width: 58ch;
}

.page-about .about-tabs__panel[hidden] {
  display: none;
}

.page-about .about-tabs__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-tabs__panel p {
  font-size: 14px;
  color: var(--rock);
}

.page-about .about-figure--team {
  margin-top: 20px;
  max-width: 520px;
}

/* ---------- 时间线 ---------- */
.page-about .about-sec--timeline {
  position: relative;
}

.page-about .about-timeline__figure {
  margin: 4px 0 22px;
}

.page-about .about-tl {
  margin: 0;
  padding: 0 0 0 4px;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 34px;
}

.page-about .about-tl__item::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 14px;
  bottom: -20px;
  width: 2px;
  background: linear-gradient(180deg, rgba(255, 107, 74, .55), rgba(91, 122, 140, .22));
  transform: skewX(-12deg);
}

.page-about .about-tl__item:last-child::after {
  display: none;
}

.page-about .about-tl__tag {
  position: absolute;
  left: 0;
  top: 2px;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--sand);
  background: var(--ink-night);
  clip-path: polygon(0 0, 100% 0, 100% 60%, 78% 100%, 0 100%);
}

.page-about .about-tl__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 14px;
  color: var(--rock);
  max-width: 44ch;
}

/* ---------- 规模数字带 ---------- */
.page-about .about-sec--stats {
  padding-bottom: 6px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 14px 12px 16px;
  background: var(--ink-deep);
  border-top: 2px solid var(--coral);
  color: var(--sand);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--coral);
}

.page-about .about-stat__unit {
  font-size: .5em;
  margin-left: 2px;
  color: var(--coral-soft);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(242, 237, 228, .76);
}

.page-about .about-metrics {
  display: grid;
  gap: 0;
  border-top: var(--about-line);
}

.page-about .about-metrics__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: var(--about-line);
}

.page-about .about-metrics__num {
  flex: 0 0 auto;
  min-width: 76px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  font-weight: 700;
  color: var(--moss-text);
}

.page-about .about-metrics__item p {
  margin: 0;
  font-size: 14px;
  color: var(--rock);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-partner {
  padding: 16px;
  background: var(--sand);
  border-top: 1px solid var(--mist);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-partner:hover {
  background: var(--shell);
  border-top-color: var(--coral);
}

.page-about .about-partner__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--ink-deep);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  color: var(--rock);
}

.page-about .about-partners__note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--clay);
  font-size: 14px;
  color: var(--rock);
  max-width: 52ch;
}

/* ---------- 品牌气质 ---------- */
.page-about .about-sec--character {
  padding-bottom: 4px;
}

.page-about .about-character {
  display: grid;
  gap: 18px;
  margin-top: 6px;
}

.page-about .about-character__quote {
  margin: 0;
  padding: 16px 0 16px 16px;
  border-left: 3px solid var(--clay);
  font-family: var(--font-editorial);
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.5;
  color: var(--ink-deep);
}

.page-about .about-character__body p {
  max-width: 46ch;
  font-size: 15px;
}

.page-about .about-character__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-character__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--rock);
}

.page-about .about-character__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 2px;
  background: var(--coral);
  transform: skewX(-30deg);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(20px, 3.6vw, 30px);
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(91, 122, 140, .45) 0%, rgba(11, 34, 57, 0) 60%),
    var(--ink-night);
  color: var(--sand);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-editorial);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  color: var(--sand);
}

.page-about .about-cta__lead {
  max-width: 48ch;
  font-size: 14px;
  color: rgba(242, 237, 228, .8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 16px;
}

.page-about .about-cta__link {
  font-size: 14px;
  color: var(--coral-soft);
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-hero__side {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: var(--about-line);
  }

  .page-about .about-metrics__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 12px 16px 12px 0;
    border-bottom: 0;
  }

  .page-about .about-metrics__num {
    min-width: 0;
    font-size: 20px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 206px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .about-index__list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-index__link {
    display: block;
    padding: 7px 0 7px 10px;
    border-bottom: 0;
    border-left: 2px solid rgba(56, 67, 76, .16);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--coral);
    border-bottom-color: transparent;
    background: rgba(242, 237, 228, .7);
  }

  .page-about .about-character {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-who__card,
  .page-about .about-steps__item,
  .page-about .about-partner,
  .page-about .about-tabs__tab {
    transition: none;
  }
}
<<<END>>>