.page-about {
  --about-pad: clamp(56px, 8vw, 96px);
  --about-block-pad: clamp(60px, 9vw, 104px);
  background: var(--indigo);
  color: var(--on-indigo);
}

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

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 24px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-ink-soft);
}

.page-about .breadcrumbs__link {
  color: var(--on-indigo-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-strong);
  padding-bottom: 1px;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .breadcrumbs__link:hover,
.page-about .breadcrumbs__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 30px 0 var(--about-pad);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 340px;
  background-image: linear-gradient(90deg, var(--hair) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__band {
  position: absolute;
  right: -8%;
  bottom: 12%;
  width: 58%;
  height: 8px;
  background: linear-gradient(90deg, var(--orange), var(--saffron) 60%, transparent);
  transform: skewY(-4deg);
  opacity: 0.85;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
  transform: skewX(-2deg);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  margin: 28px 0 30px;
  padding: 0;
}

.page-about .about-hero__fact {
  background: var(--indigo);
  padding: 14px 10px 16px;
  min-width: 0;
}

.page-about .about-hero__fact dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-ink-soft);
}

.page-about .about-hero__fact dd {
  margin: 8px 0 0;
  font-size: clamp(16px, 3.4vw, 26px);
  font-variant-numeric: tabular-nums;
  color: var(--on-indigo);
  line-height: 1.1;
}

.page-about .about-hero__fact--lime {
  color: var(--lime);
}

.page-about .about-hero__fact--mint {
  color: var(--mint);
}

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

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  min-width: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--hair-strong);
}

.page-about .about-hero__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--on-ink-soft);
}

/* ---------- 章节通用 ---------- */
.page-about .about-block {
  position: relative;
  padding: var(--about-block-pad) 0;
  border-top: 1px solid var(--hair);
}

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

.page-about .chapter__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 4.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

/* ---------- 01 档案起点 ---------- */
.page-about .about-arc__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-arc__text p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

.page-about .about-arc__lede {
  color: var(--on-indigo) !important;
  font-size: 17px !important;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  border-left: 1px solid var(--hair-strong);
}

.page-about .about-timeline__node {
  position: relative;
  padding-bottom: 30px;
}

.page-about .about-timeline__node:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--gold);
}

.page-about .about-timeline__node--current::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(200, 255, 61, 0.14);
}

.page-about .about-timeline__stage {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-timeline__name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
}

.page-about .about-timeline__desc {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--on-indigo-soft);
  max-width: 46ch;
}

.page-about .about-timeline__jump {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease), transform 120ms var(--ease);
}

.page-about .about-timeline__jump:hover,
.page-about .about-timeline__jump:focus-visible {
  border-color: var(--lime);
  transform: translateX(2px);
}

/* ---------- 02 方法论 ---------- */
.page-about .about-method__lede {
  margin: 0 0 32px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

.page-about .about-method__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .about-flow__step {
  background: var(--indigo-2);
  padding: 22px 18px 24px;
}

.page-about .about-flow__num {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-flow__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.3;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--on-indigo-soft);
}

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

.page-about .about-method__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--hair);
}

.page-about .about-method__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--on-ink-soft);
}

.page-about .about-method__note {
  margin: 34px 0 0;
  padding-left: 20px;
  border-left: 2px solid var(--saffron);
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

/* ---------- 03 关注动因 ---------- */
.page-about .about-focus__lede {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

.page-about .about-focus__row {
  display: grid;
  gap: 12px;
  padding: 26px 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-focus__row:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-focus__idx {
  margin: 0;
  font-size: 20px;
  color: var(--orange);
  line-height: 1;
}

.page-about .about-focus__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.4;
}

.page-about .about-focus__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

/* ---------- 04 覆盖范围 ---------- */
.page-about .about-scope__media {
  margin: 0 0 32px;
}

.page-about .about-scope__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--hair);
}

.page-about .about-scope__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--on-ink-soft);
}

.page-about .about-scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .about-scope__item {
  background: var(--indigo);
  padding: 20px 18px 22px;
  display: grid;
  gap: 8px;
  align-content: start;
  transition: background 140ms var(--ease);
}

.page-about .about-scope__item:hover {
  background: var(--indigo-2);
}

.page-about .about-scope__value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.05;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scope__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-indigo-soft);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-team__card {
  background: var(--indigo-2);
  border: 1px solid var(--hair);
  padding: 26px 22px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 140ms var(--ease), transform 140ms var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .about-team__num {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.34;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--on-indigo-soft);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--hair);
  display: grid;
  gap: 8px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--on-indigo-soft);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 1px;
  background: var(--mint);
}

.page-about .about-team__note {
  margin: 32px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-indigo-soft);
}

/* ---------- 06 地域基因（纸色区） ---------- */
.page-about .about-region {
  background: var(--paper);
  color: var(--ink);
  border-top-color: var(--paper-hair);
}

.page-about .about-region .chapter__num {
  color: var(--saffron);
}

.page-about .about-region .chapter__title {
  color: var(--ink);
}

.page-about .about-region__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-region__text p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(6, 10, 30, 0.78);
}

.page-about .about-region__swatches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.page-about .about-region__swatch {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--paper-hair);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(6, 10, 30, 0.8);
}

.page-about .about-region__chip {
  width: 26px;
  height: 26px;
  flex: none;
  border: 1px solid var(--paper-hair);
}

.page-about .about-region__chip--indigo {
  background: var(--indigo);
}

.page-about .about-region__chip--paper {
  background: var(--paper);
}

.page-about .about-region__chip--lime {
  background: var(--lime);
}

.page-about .about-region__chip--orange {
  background: var(--orange);
}

.page-about .about-region__chip--saffron {
  background: var(--saffron);
}

.page-about .about-region__chip--gold {
  background: var(--gold);
}

/* ---------- 07 更新节奏 ---------- */
.page-about .about-cadence__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-cadence__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
}

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

.page-about .about-cadence__item {
  padding: 14px 16px;
  border: 1px solid var(--hair);
  background: var(--indigo-2);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--on-indigo-soft);
}

.page-about .about-cadence__item .mono {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-cadence__limits li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--on-indigo-soft);
}

.page-about .about-cadence__limits li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 12px;
  height: 2px;
  background: var(--saffron);
}

.page-about .about-cadence__detail {
  margin-top: 24px;
}

.page-about .about-cadence__detail + .about-cadence__detail {
  margin-top: 12px;
}

/* ---------- 末屏 ---------- */
.page-about .about-outro {
  padding: clamp(72px, 12vw, 160px) 0 clamp(64px, 10vw, 140px);
  border-top: 1px solid var(--hair);
}

.page-about .about-outro__note {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-outro__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 4.2vw, 34px);
  line-height: 1.3;
  max-width: 32ch;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 768px) {
  .page-about .about-focus__row {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 30px;
    padding: 30px 0;
  }

  .page-about .about-cadence__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-arc__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 4fr 3fr;
    gap: 1px;
    background: var(--hair);
    border: 1px solid var(--hair);
  }

  .page-about .about-team__card {
    border: 0;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-hero__media {
    margin-right: calc(var(--gutter) * -1.6);
  }

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

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