.page-about {
  --about-rail-w: 68px;
  --about-line: rgba(216, 169, 75, 0.35);
}

/* ---------- 通用小块 ---------- */
.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 8px 0 0;
  font-weight: 800;
}

.page-about .lede {
  max-width: 38ch;
  margin-top: 12px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: 18px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(42, 18, 64, 0.72), transparent 62%),
    radial-gradient(90% 80% at 0% 100%, rgba(216, 169, 75, 0.12), transparent 60%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-about .about-hero__title {
  font-size: clamp(30px, 7vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  font-weight: 800;
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 40ch;
  color: var(--sage);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__aside {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-card);
  padding: 22px 20px;
  background: linear-gradient(160deg, rgba(11, 43, 38, 0.9), rgba(6, 25, 26, 0.7));
  box-shadow: inset 0 1px 0 rgba(255, 217, 138, 0.12);
}

.page-about .about-hero__aside-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 14px;
}

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

.page-about .about-hero__aside-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding-bottom: 11px;
  border-bottom: 1px dashed rgba(126, 154, 147, 0.28);
}

.page-about .about-hero__aside-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-hero__aside-key {
  font-size: 13px;
  color: var(--sage);
}

.page-about .about-hero__aside-val {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--gold-hi);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(24px, 5vw, 34px);
  color: var(--gold);
  line-height: 1;
}

.page-about .about-stat__label {
  font-size: 12.5px;
  color: var(--sage);
  line-height: 1.5;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-top: 8px;
}

.page-about .about-origin__grid {
  margin-top: 26px;
  gap: 26px;
}

.page-about .about-origin__prose p {
  color: var(--sage);
  line-height: 1.85;
  margin: 0 0 14px;
}

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

.page-about .about-origin__side {
  border-left: 2px solid var(--gold);
  padding: 4px 0 4px 20px;
  align-self: start;
}

.page-about .about-origin__quote {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.55;
  color: var(--gold-hi);
  margin: 0 0 18px;
  font-weight: 700;
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 13.5px;
  color: var(--sage);
}

.page-about .about-origin__list .num {
  color: var(--cyan);
  margin-right: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 工作节奏 ---------- */
.page-about .about-rhythm__head {
  max-width: 620px;
}

.page-about .about-tabs {
  margin-top: 30px;
}

.page-about .about-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .about-tab {
  appearance: none;
  border: 1px solid rgba(20, 24, 26, 0.22);
  background: transparent;
  color: var(--graphite);
  font: inherit;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-tab[aria-selected="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--graphite);
  font-weight: 700;
}

.page-about .about-tab:focus-visible {
  outline: 2px solid var(--gold-ink);
  outline-offset: 2px;
}

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

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

.page-about .about-flow__item {
  position: relative;
  background: rgba(20, 24, 26, 0.04);
  border: 1px solid rgba(20, 24, 26, 0.1);
  border-radius: var(--radius-card);
  padding: 22px 22px 20px 22px;
}

.page-about .about-flow__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--graphite);
  background: var(--gold);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  margin-bottom: 12px;
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--graphite);
}

.page-about .about-flow__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(20, 24, 26, 0.72);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--green-800);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__grid {
  gap: 32px;
  align-items: start;
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
  max-width: 40ch;
}

.page-about .about-ring-wrap {
  margin-top: 28px;
  display: grid;
  gap: 22px;
}

.page-about .about-ring {
  position: relative;
  width: 168px;
  height: 168px;
  margin: 0 auto;
  border-radius: 50%;
  background: conic-gradient(
    var(--gold) 0 39.58%,
    var(--cyan) 39.58% 72.91%,
    var(--orange) 72.91% 89.58%,
    #8C6BB8 89.58% 100%
  );
  display: grid;
  place-items: center;
  box-shadow: 0 0 0 8px rgba(216, 169, 75, 0.06);
}

.page-about .about-ring::after {
  content: "";
  position: absolute;
  inset: 26px;
  border-radius: 50%;
  background: var(--green-800);
}

.page-about .about-ring__center {
  position: relative;
  z-index: 1;
  text-align: center;
  display: grid;
  gap: 2px;
}

.page-about .about-ring__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 34px;
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .about-ring__unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

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

.page-about .about-ring__item {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: center;
  gap: 4px 10px;
  padding: 11px 10px;
  border-radius: var(--radius-sm);
  transition: background var(--dur) var(--ease);
}

.page-about .about-ring__item:hover,
.page-about .about-ring__item:focus-within {
  background: rgba(255, 217, 138, 0.08);
}

.page-about .about-ring__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-ring__item--build .about-ring__dot { background: var(--cyan); }
.page-about .about-ring__item--serve .about-ring__dot { background: var(--orange); }
.page-about .about-ring__item--content .about-ring__dot { background: #8C6BB8; }

.page-about .about-ring__role {
  font-size: 14px;
  color: #F6F1E7;
}

.page-about .about-ring__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 16px;
  color: var(--gold-hi);
}

.page-about .about-ring__desc {
  grid-column: 2 / -1;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--sage);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(42, 18, 64, 0.6), rgba(6, 25, 26, 0.9));
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__figure .media__caption {
  display: block;
  padding: 12px 18px 16px;
  font-size: 12.5px;
  color: var(--sage);
}

/* ---------- 版本演进时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  padding-top: 56px;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-timeline__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.16;
}

.page-about .about-timeline .container {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline__head {
  max-width: 600px;
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 34px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--cyan) 55%, rgba(216, 169, 75, 0.1));
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail-w) 1fr;
  gap: 16px;
}

.page-about .about-timeline__rail {
  padding-top: 20px;
  padding-right: 16px;
  text-align: right;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: calc(var(--about-rail-w) - 6px);
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(216, 169, 75, 0.16);
  z-index: 1;
}

.page-about .about-timeline__card {
  background: linear-gradient(155deg, rgba(14, 58, 51, 0.92), rgba(6, 25, 26, 0.86));
  border: 1px solid var(--about-line);
  border-radius: var(--radius-card);
  padding: 20px 22px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__card:hover {
  border-color: var(--gold-hi);
  transform: translateY(-2px);
}

.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: #F6F1E7;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-reach {
  background: var(--wine);
  color: var(--ivory);
  border-top: 1px solid rgba(255, 217, 138, 0.2);
  border-bottom: 1px solid rgba(255, 217, 138, 0.2);
}

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

.page-about .about-reach__head .lede {
  color: rgba(246, 241, 231, 0.76);
}

.page-about .about-metrics {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 217, 138, 0.24);
  background: rgba(6, 25, 26, 0.28);
}

.page-about .about-metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(22px, 4.4vw, 30px);
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .about-metric__label {
  font-size: 12.5px;
  color: rgba(246, 241, 231, 0.7);
}

.page-about .about-partners {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 217, 138, 0.26);
}

.page-about .about-partners__title {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ivory);
}

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

.page-about .about-partner {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 2px 14px;
  padding: 16px 18px;
  border-radius: var(--radius-card);
  background: rgba(6, 25, 26, 0.32);
  border: 1px solid rgba(255, 217, 138, 0.14);
}

.page-about .about-partner__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
  grid-row: span 2;
}

.page-about .about-partner__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ivory);
}

.page-about .about-partner__note {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 241, 231, 0.68);
}

/* ---------- 我们的做法 ---------- */
.page-about .about-promise {
  padding-top: 48px;
}

.page-about .about-promise__grid {
  gap: 30px;
  align-items: start;
}

.page-about .about-promise__figure {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(42, 18, 64, 0.7), rgba(6, 25, 26, 0.95));
}

.page-about .about-promise__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-promise__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-promise__item {
  padding-left: 18px;
  border-left: 2px solid rgba(53, 240, 208, 0.4);
}

.page-about .about-promise__name {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--gold-hi);
}

.page-about .about-promise__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--sage);
}

.page-about .about-promise__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-ring-wrap {
    grid-template-columns: 176px minmax(0, 1fr);
    align-items: center;
    gap: 26px;
  }

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

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-partner {
    grid-template-columns: 1fr;
  }

  .page-about .about-partner__count {
    grid-row: auto;
    margin-bottom: 10px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail-w: 118px;
  }

  .page-about .about-hero {
    padding-top: 30px;
  }

  .page-about .about-origin__grid {
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__grid {
    gap: 48px;
  }

  .page-about .about-team__figure {
    align-self: stretch;
  }

  .page-about .about-team__figure img {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-timeline__list {
    gap: 22px;
  }

  .page-about .about-timeline__list::before {
    left: 118px;
  }

  .page-about .about-timeline__card {
    padding: 24px 28px;
  }

  .page-about .about-timeline__rail {
    padding-top: 24px;
  }

  .page-about .about-timeline__year {
    font-size: 14px;
  }

  .page-about .about-timeline__dot {
    top: 30px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-promise__grid {
    gap: 52px;
    align-items: center;
  }

  .page-about .about-promise__figure {
    position: sticky;
    top: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__card:hover {
    transform: none;
  }
}
<<<END>>>