.page-about {
  --about-pad: clamp(1rem, 5vw, 2.75rem);
  --about-block: clamp(2.25rem, 7vw, 4.5rem);
  --about-dot: 8px;
}

/* ---------- 页头 ---------- */
.page-about .about-head {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3rem) var(--about-pad) clamp(1.5rem, 4vw, 2.5rem);
  background:
    radial-gradient(130% 110% at 0% 0%, rgba(30, 122, 71, 0.35), transparent 60%),
    linear-gradient(180deg, var(--c-pitch) 0%, var(--c-bg) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-head::after {
  content: "";
  position: absolute;
  left: var(--about-pad);
  right: var(--about-pad);
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-green), var(--c-cyan) 42%, var(--c-amber) 78%, transparent);
  opacity: 0.7;
}

.page-about .about-head .breadcrumb {
  margin: 0 0 clamp(1.25rem, 4vw, 2rem);
  font-size: 0.8rem;
}

.page-about .about-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .about-head__eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--c-amber);
}

.page-about .about-head__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 12vw, 4.25rem);
  line-height: 0.95;
  letter-spacing: -0.015em;
  color: var(--c-ivory);
}

.page-about .about-head__lede {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(0.95rem, 2.3vw, 1.075rem);
  line-height: 1.8;
  color: var(--c-text);
}

/* ---------- 品牌概况 ---------- */
.page-about .about-hero {
  padding: var(--about-block) var(--about-pad);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 2.75rem);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 5.5vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-ivory);
}

.page-about .about-hero__copy p {
  margin: 0 0 1rem;
  max-width: 60ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--c-text);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-pitch);
  border: 1px solid var(--line);
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(79, 227, 193, 0.14), transparent 55%);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero__media .media__item {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.page-about .about-hero__media .media__caption,
.page-about .about-crew__media .media__caption,
.page-about .about-reach__media .media__caption {
  padding: 0.7rem 0.9rem;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--c-mute);
  background: rgba(7, 26, 18, 0.72);
}

.page-about .about-metrics {
  list-style: none;
  margin: clamp(1.75rem, 5vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-metrics__item {
  padding: 1rem 0.6rem 1.05rem;
  border-right: 1px solid var(--line-soft);
}

.page-about .about-metrics__item:last-child {
  border-right: 0;
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 6.5vw, 2.25rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-amber);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--c-mute);
}

/* ---------- 时间轴 ---------- */
.page-about .about-lineage {
  padding: var(--about-block) var(--about-pad);
  background: linear-gradient(180deg, var(--c-bg), var(--c-pitch) 40%, var(--c-bg));
  border-top: 1px solid var(--line-soft);
}

.page-about .about-lineage__head,
.page-about .about-crew__head,
.page-about .about-cadence__head,
.page-about .about-promise__head {
  margin-bottom: clamp(1.5rem, 5vw, 2.5rem);
  max-width: 68ch;
}

.page-about .about-lineage__head .section__title,
.page-about .about-crew__head .section__title,
.page-about .about-cadence__head .section__title,
.page-about .about-promise__head .section__title,
.page-about .about-reach__copy .section__title,
.page-about .about-home__copy .section__title {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 5.5vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-ivory);
}

.page-about .section__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--c-clay);
}

.page-about .section__lede {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--c-mute);
}

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

.page-about .about-axis__row {
  position: relative;
  padding: 1.25rem 0 1.5rem 1.5rem;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .about-axis__row::before {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 1.65rem;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--c-clay);
  transition: background 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

.page-about .about-axis__row::after {
  content: "";
  position: absolute;
  left: calc(0.35rem + 3px);
  top: calc(1.65rem + var(--about-dot) + 4px);
  bottom: -1px;
  width: 1px;
  background: var(--line-soft);
}

.page-about .about-axis__row:last-child::after {
  display: none;
}

.page-about .about-axis__row.is-active::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 5px rgba(79, 227, 193, 0.16);
  transform: scale(1.1);
}

.page-about .about-axis__year {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.page-about .about-axis__year-num {
  font-size: clamp(1.35rem, 5.5vw, 1.85rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-mute);
  transition: color 200ms ease;
}

.page-about .about-axis__row.is-active .about-axis__year-num,
.page-about .about-axis__row.is-active .about-axis__year-q {
  color: var(--c-amber);
}

.page-about .about-axis__year-q {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--c-clay);
  transition: color 200ms ease;
}

.page-about .about-axis__title {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-ivory);
}

.page-about .about-axis__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-text);
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew {
  padding: var(--about-block) var(--about-pad);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-role {
  padding: 1.1rem 1.1rem 1.25rem;
  border-radius: var(--radius);
}

.page-about .about-role__count {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .about-role__num {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--c-amber);
  margin-right: 0.15rem;
}

.page-about .about-role__title {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-flow__wrap {
  margin-top: clamp(1.75rem, 5vw, 2.5rem);
  padding-top: clamp(1.25rem, 4vw, 1.75rem);
  border-top: 1px solid var(--line);
}

.page-about .about-flow__head {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  counter-reset: flow;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0.85rem 0.9rem 0.9rem;
  background: var(--c-rock);
  border-left: 3px solid var(--c-green);
  border-radius: 0 8px 8px 0;
}

.page-about .about-flow__step:nth-child(2) {
  border-left-color: var(--c-cyan);
}

.page-about .about-flow__step:nth-child(3) {
  border-left-color: var(--c-amber);
}

.page-about .about-flow__step:nth-child(4) {
  border-left-color: var(--c-clay);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--c-mute);
}

.page-about .about-flow__name {
  display: block;
  margin: 0.25rem 0 0.3rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-about .about-flow__desc {
  display: block;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-text);
}

.page-about .about-crew__media {
  margin: clamp(1.75rem, 5vw, 2.5rem) 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--c-pitch);
}

.page-about .about-crew__media .media__item {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  filter: saturate(0.9);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  padding: var(--about-block) var(--about-pad);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 2.5rem);
  align-items: start;
}

.page-about .about-reach__lede {
  margin: 0 0 1.25rem;
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--c-text);
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 0 0 1.25rem;
}

.page-about .about-reach__stat {
  padding: 0.8rem 0.6rem 0.85rem;
  background: rgba(20, 70, 58, 0.5);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.page-about .about-reach__stat-label {
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--c-mute);
}

.page-about .about-reach__stat-value {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-mute);
}

.page-about .about-reach__num {
  font-size: clamp(1.3rem, 5.5vw, 1.75rem);
  letter-spacing: -0.03em;
  color: var(--c-cyan);
  margin-right: 0.1rem;
}

.page-about .about-reach__note {
  margin: 0;
  max-width: 60ch;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--c-text);
  padding-left: 0.9rem;
  border-left: 3px solid var(--c-clay);
}

.page-about .about-reach__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--c-pitch);
}

.page-about .about-reach__media .media__item {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  padding: var(--about-block) var(--about-pad);
  background: linear-gradient(180deg, var(--c-bg), var(--c-pitch));
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cadence__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-cadence__item {
  padding: 1.15rem 1.1rem 1.25rem;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.page-about .about-cadence__when {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-amber);
}

.page-about .about-cadence__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-about .about-cadence__text {
  margin: 0 0 0.35rem;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--c-text);
  flex: 1 1 auto;
}

.page-about .about-link {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 193, 0.35);
  padding-bottom: 2px;
  transition: color 160ms ease, border-color 160ms ease;
  align-self: flex-start;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
}

/* ---------- 三条约定 ---------- */
.page-about .about-promise {
  padding: var(--about-block) var(--about-pad);
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-promise__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1.1rem 1.1rem 1.2rem;
  background: var(--c-rock);
  border-radius: var(--radius);
  border-left: 3px solid var(--c-green);
  transition: border-color 180ms ease, background 180ms ease;
}

.page-about .about-promise__item:hover {
  border-left-color: var(--c-cyan);
  background: #334039;
}

.page-about .about-promise__num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-amber);
  line-height: 1.2;
}

.page-about .about-promise__title {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-about .about-promise__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-promise__links {
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

/* ---------- 在辽宁的日常 ---------- */
.page-about .about-home {
  padding: var(--about-block) var(--about-pad) calc(var(--about-block) + 1rem);
  background: var(--c-pitch);
  border-top: 1px solid var(--line);
}

.page-about .about-home__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 2.5rem);
  align-items: start;
}

.page-about .about-home__lede {
  margin: 0 0 1rem;
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--c-text);
}

.page-about .about-home__text {
  margin: 0;
  max-width: 58ch;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--c-mute);
}

.page-about .about-home__panel {
  padding: 1.15rem 1.1rem 1.25rem;
  border-radius: var(--radius);
}

.page-about .about-home__panel-title {
  margin: 0 0 0.9rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .about-contact {
  list-style: none;
  margin: 0 0 0.9rem;
  padding: 0;
}

.page-about .about-contact__item {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .about-contact__label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-mute);
  margin-bottom: 0.2rem;
}

.page-about .about-contact__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--c-ivory);
  word-break: break-word;
}

.page-about .about-home__legal {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--c-mute);
}

.page-about .about-home__cta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 首次进入视口的淡入 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 240ms ease, transform 240ms ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }

  .page-about .about-axis__row {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 1.75rem;
    padding: 1.6rem 0 1.9rem 2.25rem;
  }

  .page-about .about-axis__row::before {
    left: 0.9rem;
    top: 2rem;
  }

  .page-about .about-axis__row::after {
    left: calc(0.9rem + 3px);
    top: calc(2rem + var(--about-dot) + 4px);
  }

  .page-about .about-axis__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    margin-bottom: 0;
  }

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

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

  .page-about .about-flow__step {
    border-left: 0;
    border-top: 3px solid var(--c-green);
    border-radius: 0 0 8px 8px;
  }

  .page-about .about-flow__step:nth-child(2) {
    border-top-color: var(--c-cyan);
  }

  .page-about .about-flow__step:nth-child(3) {
    border-top-color: var(--c-amber);
  }

  .page-about .about-flow__step:nth-child(4) {
    border-top-color: var(--c-clay);
  }

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

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

  .page-about .about-promise__item:first-child {
    grid-column: 1 / -1;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-head,
  .page-about .about-hero,
  .page-about .about-lineage,
  .page-about .about-crew,
  .page-about .about-reach,
  .page-about .about-cadence,
  .page-about .about-promise,
  .page-about .about-home {
    padding-left: clamp(2rem, 4vw, 3.25rem);
    padding-right: clamp(2rem, 4vw, 3.25rem);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 3rem;
  }

  .page-about .about-home__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 3rem;
  }

  .page-about .about-hero__media .media__item {
    aspect-ratio: 3 / 4;
  }

  .page-about .about-axis__row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 2.5rem;
  }

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

  .page-about .about-promise__item:first-child {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-axis__row::before,
  .page-about .about-axis__year-num,
  .page-about .about-link,
  .page-about .about-promise__item {
    transition: none;
  }

  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}
<<<END>>>