.page-about {
  --about-index-w: 172px;
  --about-stage-gap: clamp(16px, 2.4vw, 26px);
  background: var(--paper);
  color: var(--ink);
}

.page-about .eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.page-about h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
}

.page-about h3 {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.4;
  font-weight: 800;
  color: var(--ink);
}

.page-about p {
  line-height: 1.75;
}

.page-about .media-frame {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--teal-mist), var(--canvas));
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(10px, 2vw, 20px) 0 clamp(36px, 6vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 52px);
  align-items: center;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 7.2vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--ink-80);
}

.page-about .about-hero__extra {
  margin: 12px 0 0;
  max-width: 32em;
  font-size: 0.95rem;
  color: var(--ink-80);
}

.page-about .about-hero__figure {
  background: linear-gradient(160deg, var(--teal-mist) 0%, var(--canvas) 100%);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: var(--teal-mist);
}

.page-about .about-origin__inner {
  max-width: 880px;
}

.page-about .about-origin .eyebrow {
  color: var(--ink-80);
}

.page-about .about-origin__body {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-about .about-origin__body p {
  margin: 0;
  color: var(--ink);
  font-size: clamp(0.98rem, 1.4vw, 1.05rem);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__head {
  max-width: 640px;
}

.page-about .about-timeline__head p {
  margin: 0;
  color: var(--ink-80);
}

.page-about .about-timeline__strip {
  margin: clamp(20px, 3vw, 32px) 0 clamp(28px, 4vw, 44px);
}

.page-about .about-timeline__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-index {
  border-left: 2px solid var(--hairline);
  padding-left: 12px;
}

.page-about .about-index__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-80);
  text-transform: uppercase;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--canvas);
  color: var(--ink-80);
  text-decoration: none;
  white-space: nowrap;
  transition: background 180ms ease-out, color 180ms ease-out, transform 180ms ease-out;
}

.page-about .about-index__link:hover {
  background: var(--teal-mist);
  color: var(--ink);
  transform: translateY(-2px);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .about-index__year {
  font-size: 13px;
  font-weight: 700;
  color: var(--teal-deep);
}

.page-about .about-index__name {
  font-size: 13px;
}

.page-about .about-stages {
  display: flex;
  flex-direction: column;
  gap: var(--about-stage-gap);
}

.page-about .about-stage {
  position: relative;
  padding: clamp(20px, 3.4vw, 30px) clamp(18px, 3vw, 28px);
  background: var(--paper);
  scroll-margin-top: 110px;
  transition: box-shadow 200ms ease-out, transform 200ms ease-out;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--teal) 0%, var(--teal-mist) 100%);
}

.page-about .about-stage:hover {
  transform: translateY(-2px);
}

.page-about .about-stage__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .about-stage__year {
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--teal-deep);
}

.page-about .about-stage p {
  margin: 0 0 10px;
  color: var(--ink-80);
  font-size: 0.97rem;
}

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

.page-about .about-stage strong {
  color: var(--orange);
  font-weight: 700;
  font-family: var(--font-mono);
}

.page-about .about-stage__note {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--teal-deep);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  background: var(--canvas);
}

.page-about .about-scale .section-head p {
  margin: 0;
  color: var(--ink-80);
  max-width: 46em;
}

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-scale__item {
  padding: clamp(20px, 3vw, 28px);
  background: var(--paper);
  border-radius: var(--radius);
  border-top: 3px solid var(--teal);
  transition: box-shadow 200ms ease-out, transform 200ms ease-out;
}

.page-about .about-scale__item:hover {
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}

.page-about .about-scale__num {
  display: block;
  font-size: clamp(2rem, 5.4vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-scale__num small {
  margin-left: 6px;
  font-size: 0.4em;
  font-weight: 500;
  color: var(--ink-80);
  font-family: var(--font-sans);
}

.page-about .about-scale__item p {
  margin: 12px 0 0;
  font-size: 0.94rem;
  color: var(--ink-80);
}

.page-about .about-scale__bar {
  margin-top: 18px;
  padding: 16px clamp(18px, 3vw, 26px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  background: var(--teal-mist);
  border-radius: var(--radius);
}

.page-about .about-scale__bar-text {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.page-about .about-scale__bar-text strong {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-partners__text p {
  margin: 0;
  color: var(--ink-80);
}

.page-about .about-partners__text strong {
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 20px 0 24px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-partners__list li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-partners__list strong {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-partners__list span {
  font-size: 0.92rem;
  color: var(--ink-80);
  line-height: 1.7;
}

.page-about .about-partners__figure {
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-80) 100%);
}

/* ---------- 认可 ---------- */
.page-about .about-acclaim {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-acclaim .eyebrow {
  color: var(--teal-mist);
}

.page-about .about-acclaim h2 {
  color: var(--paper);
}

.page-about .about-acclaim__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-acclaim__item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-acclaim__item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.96rem;
}

.page-about .about-acclaim__item strong {
  color: var(--orange-soft);
  font-family: var(--font-mono);
}

.page-about .about-acclaim__year {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--orange);
  font-weight: 700;
}

/* ---------- 接下来 ---------- */
.page-about .about-next .section-head p {
  margin: 0;
  color: var(--ink-80);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-next__card {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--canvas);
  border-radius: var(--radius);
  transition: background 200ms ease-out, transform 200ms ease-out;
}

.page-about .about-next__card:hover {
  background: var(--teal-mist);
  transform: translateY(-2px);
}

.page-about .about-next__no {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--teal-deep);
}

.page-about .about-next__card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-80);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-about .about-cta__inner {
  padding: clamp(26px, 4.4vw, 44px);
  background: var(--teal);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  display: grid;
  gap: 22px;
}

.page-about .about-cta__text h2 {
  color: var(--ink);
  margin-bottom: 10px;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 44em;
  color: var(--ink);
  opacity: 0.86;
  font-size: 0.97rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-partners__list li {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-hero__figure {
    transform: translateY(14px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  }

  .page-about .about-partners__figure {
    transform: translateY(-12px);
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline__body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
  }

  .page-about .about-index__link {
    width: 100%;
    background: transparent;
  }

  .page-about .about-stage:nth-child(odd) {
    margin-right: 26px;
  }

  .page-about .about-stage:nth-child(even) {
    margin-left: 26px;
  }
}

@media (max-width: 420px) {
  .page-about .about-acclaim__item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}
<<<END>>>