.page-about {
  --about-hair: rgba(142, 155, 170, .16);
  --about-paper-line: rgba(10, 22, 38, .12);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(34px, 7vw, 68px) clamp(44px, 7vw, 78px);
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__lead .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.03;
  letter-spacing: -.01em;
  margin: 0 0 20px;
  color: var(--paper-100);
}

.page-about .about-hero__lead .lede {
  max-width: 46ch;
  margin: 0;
}

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

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

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(18, 41, 63, .72), rgba(10, 22, 38, .48));
}

.page-about .fact__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 5vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--volt-400);
}

.page-about .fact__label {
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--cool-grey);
}

/* ---------- 01 定位 ---------- */

.page-about .about-position__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-position__intro .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-position__intro p {
  color: var(--text-soft);
  max-width: 52ch;
}

.page-about .about-position__intro p + p {
  margin-top: 16px;
}

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

.page-about .position-list__item {
  position: relative;
  padding: 22px 22px 22px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: linear-gradient(150deg, rgba(18, 41, 63, .56), rgba(6, 13, 22, .3));
  overflow: hidden;
}

.page-about .position-list__item::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block: 14px;
  width: 2px;
  border-radius: 2px;
  background: var(--cool-grey);
  opacity: .5;
}

.page-about .position-list__item:nth-child(1)::before { background: var(--volt-400); opacity: 1; }
.page-about .position-list__item:nth-child(2)::before { background: var(--cyan-400); opacity: 1; }
.page-about .position-list__item:nth-child(3)::before { background: var(--amber-500); opacity: 1; }

.page-about .position-list__idx {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--cool-grey);
}

.page-about .position-list__title {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 600;
  margin: 8px 0 8px;
  color: var(--paper-100);
}

.page-about .position-list__item p {
  margin: 0;
  font-size: .96rem;
  color: var(--text-soft);
}

/* ---------- 02 版本时间线 ---------- */

.page-about .about-timeline__head .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-timeline__head .lede {
  max-width: 54ch;
  margin-top: 14px;
}

.page-about .about-timeline__figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .media-frame__caption {
  margin-top: 10px;
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--cool-grey);
}

.page-about .about-timeline__nav {
  margin-top: clamp(24px, 4vw, 34px);
}

.page-about .about-timeline__nav .chip {
  text-decoration: none;
  color: var(--text-soft);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(30px, 5vw, 46px) 0 0;
  padding: 0 0 0 44px;
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 34px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--amber-500), var(--cyan-400) 52%, var(--volt-400));
  opacity: .5;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -44px;
  top: 24px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--amber-500);
  box-shadow: 0 0 0 6px rgba(255, 162, 58, .09);
}

.page-about .timeline__item:nth-child(2)::before {
  border-color: var(--cyan-400);
  box-shadow: 0 0 0 6px rgba(53, 208, 186, .09);
}

.page-about .timeline__item:nth-child(3)::before {
  border-color: var(--volt-400);
  box-shadow: 0 0 0 6px rgba(200, 255, 77, .09);
}

.page-about .timeline__card {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 34px);
}

.page-about .timeline__ghost {
  position: absolute;
  top: -8px;
  right: 10px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: rgba(142, 155, 170, .1);
  pointer-events: none;
  user-select: none;
}

.page-about .timeline__card .panel-title {
  position: relative;
  margin: 10px 0 14px;
}

.page-about .timeline__card p {
  position: relative;
  color: var(--text-soft);
  max-width: 56ch;
}

.page-about .timeline__gain {
  display: block;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--about-hair);
  font-size: .95rem;
}

.page-about .timeline__gain-tag {
  display: inline-block;
  margin-right: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 162, 58, .14);
  color: var(--amber-500);
  font-size: .72rem;
  letter-spacing: .08em;
  vertical-align: 2px;
}

/* ---------- 03 数据来源（纸色） ---------- */

.page-about .about-data__panel {
  padding: clamp(24px, 5vw, 46px);
}

.page-about .about-data__grid {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
}

.page-about .about-data__body .eyebrow {
  margin-bottom: 14px;
  color: rgba(10, 22, 38, .55);
}

.page-about .about-data__body p {
  color: rgba(10, 22, 38, .78);
  max-width: 52ch;
}

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

.page-about .verify-chain__step {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(10, 22, 38, .05);
  border: 1px solid var(--about-paper-line);
}

.page-about .verify-chain__step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 24px;
  bottom: -16px;
  width: 2px;
  height: 16px;
  background: repeating-linear-gradient(180deg, rgba(255, 162, 58, .8) 0 4px, transparent 4px 8px);
}

.page-about .verify-chain__idx {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: .92rem;
  font-weight: 700;
  color: var(--ink-900);
  opacity: .55;
}

.page-about .verify-chain__text {
  font-size: .95rem;
  line-height: 1.68;
  color: rgba(10, 22, 38, .82);
}

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

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--about-paper-line);
}

.page-about .about-data__figure figcaption {
  margin-top: 10px;
  font-size: .8rem;
  color: rgba(10, 22, 38, .55);
}

/* ---------- 04 团队 ---------- */

.page-about .about-team__panel {
  padding: clamp(24px, 5vw, 46px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--about-paper-line);
}

.page-about .about-team__body .eyebrow {
  margin-bottom: 14px;
  color: rgba(10, 22, 38, .55);
}

.page-about .about-team__body p {
  color: rgba(10, 22, 38, .78);
  max-width: 56ch;
}

.page-about .team-split {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}

.page-about .team-split__cell {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-paper-line);
  background: rgba(255, 255, 255, .5);
}

.page-about .team-split__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-900);
}

.page-about .team-split__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .team-split__desc {
  font-size: .88rem;
  color: rgba(10, 22, 38, .62);
}

.page-about .about-team__note {
  padding-top: 20px;
  border-top: 1px dashed var(--about-paper-line);
}

.page-about .about-team__link {
  display: inline-block;
  margin-top: 16px;
  font-weight: 600;
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 2px solid var(--amber-500);
  padding-bottom: 2px;
}

/* ---------- 05 长期追赛 ---------- */

.page-about .about-longrun__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-longrun__intro .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-longrun__intro .section-title {
  max-width: 18ch;
}

.page-about .about-longrun__intro p {
  color: var(--text-soft);
  max-width: 46ch;
  margin-top: 16px;
}

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

.page-about .longrun-list__item {
  padding: 22px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: linear-gradient(160deg, rgba(18, 41, 63, .68), rgba(6, 13, 22, .34));
}

.page-about .longrun-list__title {
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--volt-400);
}

.page-about .longrun-list__item p {
  margin: 0;
  font-size: .95rem;
  color: var(--text-soft);
}

/* ---------- 06 三条坚持 ---------- */

.page-about .about-principles__head .eyebrow {
  margin-bottom: 14px;
}

.page-about .principles {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 38px);
}

.page-about .principle {
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hair);
  background: linear-gradient(170deg, rgba(18, 41, 63, .62), rgba(6, 13, 22, .34));
}

.page-about .principle:nth-child(1) { border-top: 3px solid var(--volt-400); }
.page-about .principle:nth-child(2) { border-top: 3px solid var(--cyan-400); }
.page-about .principle:nth-child(3) { border-top: 3px solid var(--amber-500); }

.page-about .principle__idx {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--cool-grey);
}

.page-about .principle__title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 10px 0 10px;
  color: var(--paper-100);
}

.page-about .principle p {
  margin: 0;
  font-size: .95rem;
  color: var(--text-soft);
}

/* ---------- 07 行动区 ---------- */

.page-about .about-next__head .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-next__head .lede {
  max-width: 52ch;
  margin-top: 14px;
}

.page-about .next-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 38px);
}

.page-about .next-card {
  position: relative;
  display: block;
  padding: clamp(24px, 4vw, 34px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hair);
  background: linear-gradient(150deg, rgba(18, 41, 63, .86), rgba(10, 22, 38, .6));
  text-decoration: none;
  color: var(--paper-100);
  transition: transform .32s ease, border-color .32s ease;
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--volt-400);
}

.page-about .next-card__tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--ink-950);
  background: var(--volt-400);
}

.page-about .next-card:nth-child(2) .next-card__tag {
  background: var(--amber-500);
}

.page-about .next-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  font-weight: 600;
  margin: 16px 0 10px;
}

.page-about .next-card p {
  margin: 0 0 26px;
  font-size: .95rem;
  color: var(--text-soft);
  max-width: 38ch;
}

.page-about .next-card__go {
  position: absolute;
  right: clamp(24px, 4vw, 34px);
  bottom: clamp(20px, 3vw, 28px);
  font-size: 1.4rem;
  color: var(--volt-400);
}

.page-about .next-card:nth-child(2) .next-card__go {
  color: var(--amber-500);
}

.page-about .about-next__foot {
  margin-top: 24px;
  font-size: .92rem;
  color: var(--text-dim);
}

.page-about .about-next__foot a {
  color: var(--paper-100);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .verify-chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .verify-chain__step {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .verify-chain__step:not(:last-child)::after {
    left: auto;
    right: -12px;
    bottom: auto;
    top: 26px;
    width: 12px;
    height: 2px;
    background: repeating-linear-gradient(90deg, rgba(255, 162, 58, .85) 0 4px, transparent 4px 8px);
  }

  .page-about .team-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-position__intro {
    padding-top: 6px;
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .about-longrun__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 6vw, 72px);
  }

  .page-about .about-longrun__intro {
    position: sticky;
    top: calc(var(--header-h-scrolled) + 32px);
  }

  .page-about .timeline {
    padding-left: 56px;
  }

  .page-about .timeline::before {
    left: 15px;
  }

  .page-about .timeline__item::before {
    left: -56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card {
    transition: none;
  }

  .page-about .next-card:hover,
  .page-about .next-card:focus-visible {
    transform: none;
  }
}
<<<END>>>