.page-about {
  --track-col: 68px;
  --about-pad: clamp(44px, 7vw, 84px);
  background: var(--chalk);
  color: var(--black);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-block: 18px 10px;
}

/* ── 首屏 ───────────────────────────────── */
.page-about .about-lead {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  color: var(--chalk);
  padding-block: clamp(34px, 6vw, 74px) clamp(44px, 7vw, 92px);
}

.page-about .about-lead__waves {
  position: absolute;
  inset: auto 0 -8% 0;
  height: 66%;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-lead__waves svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-lead__waves path {
  fill: none;
  stroke: var(--turf);
  stroke-width: 1.2;
  vector-effect: non-scaling-stroke;
}

.page-about .about-lead__waves path:nth-child(2) {
  stroke: rgba(47, 179, 154, 0.55);
}

.page-about .about-lead__waves path:nth-child(3) {
  stroke: rgba(198, 244, 50, 0.3);
}

.page-about .about-lead__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .about-lead h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 7.6vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--chalk);
  max-width: 16em;
}

.page-about .about-lead__deck {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  line-height: 1.75;
  color: rgba(244, 247, 239, 0.92);
  max-width: 46ch;
}

.page-about .about-lead__body {
  margin: 14px 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(244, 247, 239, 0.7);
  max-width: 48ch;
}

.page-about .about-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figure {
  flex: 1 1 104px;
  min-width: 104px;
  padding: 12px 16px;
  border: 1px solid rgba(198, 244, 50, 0.34);
  background: rgba(198, 244, 50, 0.07);
}

.page-about .about-figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.32rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .about-figure__label {
  display: block;
  margin-top: 5px;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: rgba(244, 247, 239, 0.66);
}

.page-about .about-lead__figure {
  margin: 0;
  border: 1px solid rgba(198, 244, 50, 0.26);
  background: rgba(11, 110, 59, 0.35);
}

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

/* ── 章节锚点条 ─────────────────────────── */
.page-about .about-anchors {
  background: var(--ink);
  border-top: 1px solid rgba(169, 184, 174, 0.24);
}

.page-about .about-anchors__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 12px;
  scrollbar-width: thin;
}

.page-about .about-anchors a {
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 1px solid rgba(198, 244, 50, 0.3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-anchors a:hover,
.page-about .about-anchors a:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

/* ── 通用区块 ───────────────────────────── */
.page-about .about-section {
  padding-block: var(--about-pad);
}

.page-about .about-section .section-head {
  margin-bottom: clamp(22px, 3.6vw, 38px);
}

.page-about .about-section--mist {
  background: var(--mist);
}

.page-about .about-section--ink {
  background: var(--ink);
  color: var(--chalk);
}

.page-about .about-section--turf {
  background: var(--turf);
  color: var(--chalk);
}

.page-about .about-section--ink .section-head__title,
.page-about .about-section--turf .section-head__title {
  color: var(--chalk);
}

.page-about .about-section--ink .section-head__note,
.page-about .about-section--turf .section-head__note {
  color: rgba(244, 247, 239, 0.74);
}

/* ── 历程 ───────────────────────────────── */
.page-about .about-strip {
  margin: 0 0 clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--mist);
}

.page-about .about-strip img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .about-strip figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-about .about-track {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: var(--track-col);
  width: 1px;
  background: var(--line-strong);
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--track-col) minmax(0, 1fr);
  gap: 6px clamp(14px, 3vw, 30px);
  padding-block: clamp(16px, 2.6vw, 26px);
}

.page-about .about-track__item + .about-track__item {
  border-top: 1px solid var(--line);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  top: 22px;
  left: calc(var(--track-col) - 5px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--turf);
  box-shadow: 0 0 0 4px var(--chalk);
  z-index: 1;
}

.page-about .about-track__item:last-child::before {
  background: var(--orange);
}

.page-about .about-track__year {
  grid-column: 1;
  grid-row: 1;
  padding-right: 16px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--turf);
  align-self: start;
  padding-top: 2px;
}

.page-about .about-track__body {
  grid-column: 2;
  transition: transform 0.2s ease;
}

.page-about .about-track__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(1.14rem, 2.6vw, 1.42rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--black);
}

.page-about .about-track__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: #26382c;
  max-width: 60ch;
}

.page-about .about-track__aside {
  grid-column: 2;
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--lime);
  background: rgba(198, 244, 50, 0.12);
  padding-block: 8px;
  padding-right: 10px;
}

.page-about .about-track__tag {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--turf);
}

.page-about .about-track__aside p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-track__item:hover .about-track__body,
.page-about .about-track__item:focus-within .about-track__body {
  transform: translateX(4px);
}

/* ── 团队 ───────────────────────────────── */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-split__text {
  margin: 0 0 22px;
  font-size: 1rem;
  line-height: 1.85;
  color: #26382c;
  max-width: 62ch;
}

.page-about .about-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  padding-block: 11px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  padding-top: 3px;
}

.page-about .about-facts__v {
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--black);
}

.page-about .about-split__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--chalk);
}

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

.page-about .about-split__media figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ── 移动优先 ───────────────────────────── */
.page-about .about-speed {
  display: grid;
  gap: 1px;
  background: rgba(198, 244, 50, 0.3);
  border: 1px solid rgba(198, 244, 50, 0.3);
}

.page-about .about-speed__item {
  background: var(--ink);
  padding: clamp(18px, 3vw, 28px) clamp(16px, 2.6vw, 26px);
}

.page-about .about-speed__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-speed__unit {
  font-size: 0.42em;
  margin-left: 3px;
  color: rgba(198, 244, 50, 0.7);
}

.page-about .about-speed__cap {
  display: block;
  margin-top: 10px;
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgba(244, 247, 239, 0.78);
}

.page-about .about-speed__notes {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  gap: 14px;
}

.page-about .about-speed__notes p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(244, 247, 239, 0.82);
  max-width: 62ch;
}

/* ── 合作生态 ───────────────────────────── */
.page-about .about-partners {
  display: grid;
  gap: 1px;
  background: rgba(244, 247, 239, 0.32);
  border: 1px solid rgba(244, 247, 239, 0.32);
}

.page-about .about-partner {
  background: var(--turf);
  padding: clamp(18px, 3vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-partner__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-partner__label {
  font-size: 0.85rem;
  line-height: 1.65;
  color: rgba(244, 247, 239, 0.88);
}

.page-about .about-partner-notes {
  margin-top: clamp(24px, 3.4vw, 34px);
  display: grid;
  gap: 14px;
}

.page-about .about-partner-notes p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(244, 247, 239, 0.88);
  max-width: 64ch;
}

/* ── 江畔气质 ───────────────────────────── */
.page-about .about-river {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--chalk);
}

.page-about .about-river__waves {
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  z-index: 0;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-river__waves svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-river__waves path {
  fill: none;
  stroke: rgba(94, 114, 100, 0.4);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.page-about .about-river__waves path:nth-child(2) {
  stroke: rgba(11, 110, 59, 0.28);
}

.page-about .about-river__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 50px);
}

.page-about .about-river__copy p {
  margin: 0 0 14px;
  font-size: 0.96rem;
  line-height: 1.9;
  color: #26382c;
  max-width: 62ch;
}

.page-about .about-river__aside {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.62);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-river__tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-river__dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-river__dl dt {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--turf);
  letter-spacing: 0.04em;
}

.page-about .about-river__dl dd {
  margin: 4px 0 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-river__dl dd:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

/* ── 适合谁 ─────────────────────────────── */
.page-about .about-who {
  display: grid;
  gap: 14px;
}

.page-about .about-who__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--turf);
  background: #fff;
}

.page-about .about-who__tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--steel);
  background: var(--mist);
  padding: 4px 9px;
}

.page-about .about-who__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  line-height: 1.36;
  color: var(--black);
}

.page-about .about-who__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--steel);
  flex: 1 1 auto;
}

.page-about .about-who__card .btn {
  align-self: flex-start;
}

.page-about .about-who__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-who__foot a {
  color: var(--turf);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-who__foot a:hover {
  color: var(--ink);
}

/* ── 桌面布局 ───────────────────────────── */
@media (min-width: 900px) {
  .page-about {
    --track-col: 110px;
  }

  .page-about .about-lead__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .about-track__item {
    grid-template-columns: var(--track-col) minmax(0, 1fr) 250px;
    align-items: start;
  }

  .page-about .about-track__aside {
    grid-column: 3;
    grid-row: 1 / span 2;
    margin-top: 0;
  }

  .page-about .about-track__year {
    font-size: 0.86rem;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-speed__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .about-partner-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-river__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

@media (min-width: 1180px) {
  .page-about .about-who {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-about {
    --track-col: 58px;
  }

  .page-about .about-facts li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .page-about .about-figure {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__body,
  .page-about .about-anchors a {
    transition: none;
  }

  .page-about .about-track__item:hover .about-track__body,
  .page-about .about-track__item:focus-within .about-track__body {
    transform: none;
  }
}