.page-about {
  --about-rail: 124px;
  --about-gap: clamp(20px, 3vw, 42px);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .ob-crumbs {
  margin: 6px 0 0;
}

.page-about .about-intro {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-intro__main {
  position: relative;
  padding-left: clamp(14px, 2vw, 28px);
}

.page-about .about-intro__main::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--ob-yellow) 0%, var(--ob-red) 100%);
}

.page-about .about-intro__title {
  margin: 10px 0 18px;
  letter-spacing: -0.01em;
}

.page-about .about-intro__lead {
  margin: 0 0 26px;
  max-width: 62ch;
}

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

.page-about .about-facts {
  margin: 0;
  padding: 20px 22px;
  border-radius: var(--ob-radius-lg);
  background: linear-gradient(160deg, var(--ob-panel) 0%, var(--ob-ink) 100%);
  border: 1px solid var(--ob-line-soft);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--ob-line-soft);
}

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

.page-about .about-facts dt {
  color: var(--ob-slate);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-facts dd {
  margin: 0;
  color: var(--ob-yellow);
  font-size: 15px;
  font-weight: 600;
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(270px, 0.85fr);
  }
}

/* ---------- 基础工作 ---------- */
.page-about .about-basics__grid {
  align-items: stretch;
}

.page-about .about-basic {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 100%;
}

.page-about .about-basic::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--ob-yellow);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--ob-dur) var(--ob-ease);
}

.page-about .about-basic:hover::after,
.page-about .about-basic:focus-within::after {
  transform: scaleX(1);
}

.page-about .about-basic:nth-child(2)::after {
  background: var(--ob-red);
}

.page-about .about-basic:nth-child(3)::after {
  background: var(--ob-slate);
}

/* ---------- 版本脚印 ---------- */
.page-about .about-timeline__layout {
  display: grid;
  gap: 22px;
}

.page-about .about-timeline__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-timeline__nav-link {
  flex: 0 0 auto;
  font-family: var(--ob-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ob-slate);
  text-decoration: none;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--ob-line-soft);
  white-space: nowrap;
  transition: color var(--ob-dur) var(--ob-ease),
    background-color var(--ob-dur) var(--ob-ease),
    border-color var(--ob-dur) var(--ob-ease);
}

.page-about .about-timeline__nav-link:hover,
.page-about .about-timeline__nav-link:focus-visible {
  color: var(--ob-ink);
  background: var(--ob-yellow);
  border-color: var(--ob-yellow);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 34px 26px;
  border-left: 1px solid var(--ob-line);
  scroll-margin-top: 120px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ob-panel-2);
  transition: background-color var(--ob-dur) var(--ob-ease),
    transform var(--ob-dur) var(--ob-ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:target::before {
  background: var(--ob-yellow);
  transform: scale(1.4);
}

.page-about .about-timeline__year {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ob-yellow);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 68ch;
  color: var(--ob-slate);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-timeline__figure {
  margin: clamp(26px, 4vw, 48px) 0 0;
  max-width: 520px;
}

@media (min-width: 900px) {
  .page-about .about-timeline__layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 64px);
  }

  .page-about .about-timeline__nav {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-timeline__nav-link {
    border-color: transparent;
    padding: 5px 10px;
  }

  .page-about .about-timeline__nav-link:hover,
  .page-about .about-timeline__nav-link:focus-visible {
    background: transparent;
    border-color: var(--ob-line);
    color: var(--ob-yellow);
  }
}

/* ---------- 编辑部 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-team__cards {
  display: grid;
  gap: 14px;
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: background-color var(--ob-dur) var(--ob-ease),
    transform var(--ob-dur) var(--ob-ease);
}

.page-about .about-team__card:hover {
  transform: translateY(-2px);
  background: var(--ob-panel-2);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--ob-font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ob-yellow);
}

.page-about .about-team__card:nth-child(2) .about-team__num {
  color: var(--ob-red);
}

.page-about .about-team__card:nth-child(3) .about-team__num {
  color: var(--ob-slate);
}

.page-about .about-team__duty {
  margin: 4px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--ob-line-soft);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ob-slate);
  transition: color var(--ob-dur) var(--ob-ease);
}

.page-about .about-team__card:hover .about-team__duty {
  color: var(--ob-bone);
}

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

.page-about .about-quote {
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: clamp(20px, 3vw, 32px) clamp(20px, 3vw, 38px);
  border-radius: var(--ob-radius-lg);
  background: var(--ob-brown);
  border-left: 4px solid var(--ob-yellow);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ob-bone);
}

.page-about .about-quote .about-quote__cite {
  margin-top: 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ob-slate);
}

@media (min-width: 1000px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  }
}

/* ---------- 数据来源 ---------- */
.page-about .about-source__panel {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  padding: clamp(22px, 4vw, 46px);
  border-radius: var(--ob-radius-lg);
  background: var(--ob-cream);
  border: 1px solid rgba(43, 33, 26, 0.12);
}

.page-about .about-source__text p {
  margin: 0 0 16px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ob-brown);
}

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

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

.page-about .about-source__figure .ob-figure__cap {
  color: rgba(43, 33, 26, 0.68);
}

@media (min-width: 900px) {
  .page-about .about-source__panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(250px, 0.8fr);
  }
}

/* ---------- 覆盖规模 ---------- */
.page-about .about-scale__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-scale__cell {
  padding: 18px 16px;
  border-radius: var(--ob-radius-md);
  background: linear-gradient(150deg, var(--ob-panel) 0%, var(--ob-ink) 100%);
  border: 1px solid var(--ob-line-soft);
  transition: border-color var(--ob-dur) var(--ob-ease),
    transform var(--ob-dur) var(--ob-ease);
}

.page-about .about-scale__cell:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 199, 58, 0.45);
}

.page-about .about-scale__cell .ob-stat__num {
  margin: 0 0 6px;
  color: var(--ob-yellow);
}

.page-about .about-scale__cell .ob-stat__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ob-slate);
}

.page-about .about-scale__unit {
  font-family: var(--ob-font-sans);
  font-size: 14px;
  margin-left: 3px;
  color: var(--ob-bone);
}

.page-about .about-scale__note {
  margin: 22px 0 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ob-slate);
}

.page-about .about-scale__note a {
  color: var(--ob-yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 199, 58, 0.4);
}

.page-about .about-scale__note a:hover,
.page-about .about-scale__note a:focus-visible {
  border-bottom-color: var(--ob-yellow);
}

@media (min-width: 780px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__filter {
  margin-bottom: 22px;
}

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

.page-about .about-partners__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 24px;
  border-radius: var(--ob-radius-md);
  background: var(--ob-panel);
  border: 1px solid var(--ob-line-soft);
  transition: border-color var(--ob-dur) var(--ob-ease),
    transform var(--ob-dur) var(--ob-ease);
}

.page-about .about-partners__item:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 199, 58, 0.4);
}

.page-about .about-partners__item .ob-tag {
  align-self: flex-start;
}

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

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

.page-about .about-partners__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}

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

@media (min-width: 1100px) {
  .page-about .about-partners__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-basic::after,
  .page-about .about-team__card,
  .page-about .about-scale__cell,
  .page-about .about-partners__item,
  .page-about .about-timeline__item::before {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-scale__cell:hover,
  .page-about .about-partners__item:hover {
    transform: none;
  }
}
<<<END>>>