.page-about {
  display: block;
  background-color: var(--void-green);
  color: var(--text-primary);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--lime-signal);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 44px) 0 clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--grid-hairline);
  background-image:
    linear-gradient(to right, rgba(29, 58, 47, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 58, 47, 0.32) 1px, transparent 1px),
    radial-gradient(120% 90% at 88% 0%, rgba(200, 255, 77, 0.11), transparent 62%);
  background-size: 88px 88px, 88px 88px, 100% 100%;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(18px, 4vw, 36px);
}

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

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.025em;
}

.page-about .about-lead {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: #C4D6CC;
}

.page-about .about-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background-color: var(--grid-hairline);
  border: 1px solid var(--grid-hairline);
}

.page-about .about-meta__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background-color: var(--moss-panel);
}

.page-about .about-meta__value {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--amber-score);
}

.page-about .about-meta__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.page-about .about-hero__media {
  margin: 0;
  aspect-ratio: 4 / 5;
  background-color: var(--moss-panel);
  border: 1px solid var(--grid-hairline);
}

.page-about .about-hero__media .media-frame__inner {
  height: 100%;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体骨架：索引 + 长文 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(30px, 6vw, 64px);
}

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

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--text-primary);
  background-color: var(--moss-panel);
  border: 1px solid var(--grid-hairline);
  border-radius: var(--radius);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-index__link:hover {
  border-color: var(--lime-signal);
  color: var(--lime-signal);
}

.page-about .about-index__num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--lime-signal);
}

.page-about .about-index__label {
  font-size: 13px;
  letter-spacing: 0.04em;
}

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

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: clamp(26px, 5vw, 48px) 0;
  border-top: 1px solid var(--grid-hairline);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(14px, 2.4vw, 22px);
}

.page-about .chapter__num {
  flex: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 62px);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: #2C5A45;
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .chapter__intro {
  max-width: 40ch;
  margin: 0 0 clamp(22px, 3.4vw, 32px);
  font-size: 16px;
  line-height: 1.85;
  color: #C4D6CC;
}

.page-about .chapter__note {
  max-width: 40ch;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--grid-hairline);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 01 团队 ---------- */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .about-filter .pill--filter {
  padding: 7px 13px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  background-color: transparent;
  border: 1px solid var(--grid-hairline);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .about-filter .pill--filter:hover {
  border-color: var(--lime-signal);
  color: var(--lime-signal);
}

.page-about .about-filter .pill--filter[aria-pressed="true"] {
  color: var(--void-green);
  background-color: var(--lime-signal);
  border-color: var(--lime-signal);
}

.page-about .about-filter__count {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.page-about .team-grid {
  display: grid;
  gap: 1px;
  background-color: var(--grid-hairline);
  border: 1px solid var(--grid-hairline);
}

.page-about .team-card {
  padding: clamp(18px, 3vw, 26px);
  background-color: var(--moss-panel);
}

.page-about [data-filter-item][hidden] {
  display: none !important;
}

.page-about .team-card__figure {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.page-about .team-card__num {
  display: inline-block;
  margin-right: 4px;
  padding: 3px 8px;
  font-size: 18px;
  color: var(--void-green);
  background-color: var(--amber-score);
  border-radius: var(--radius);
}

.page-about .team-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.01em;
}

.page-about .team-card__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: #C4D6CC;
}

.page-about .team-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .team-card__list li {
  padding: 4px 9px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--cyan-live);
  border: 1px solid var(--grid-hairline);
  border-radius: var(--radius);
}

/* ---------- 02 流程 ---------- */
.page-about .workflow {
  display: grid;
  gap: clamp(22px, 3.6vw, 36px);
}

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

.page-about .flow__svg {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 6px;
}

.page-about .flow__steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  background-color: var(--moss-panel);
  border-top: 2px solid var(--lime-signal);
}

.page-about .flow-step__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.page-about .flow-step__out {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  opacity: 0.72;
  transition: opacity 180ms var(--ease), color 180ms var(--ease);
}

.page-about .flow-step:hover .flow-step__out,
.page-about .flow-step:focus .flow-step__out {
  opacity: 1;
  color: var(--lime-signal);
}

.page-about .workflow__note {
  max-width: 40ch;
  margin: clamp(18px, 2.6vw, 24px) 0;
  font-size: 15px;
  line-height: 1.85;
  color: #C4D6CC;
}

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

/* ---------- 03 三代结构 ---------- */
.page-about .era-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--grid-hairline);
}

.page-about .era {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.6vw, 22px) 0;
  border-bottom: 1px solid var(--grid-hairline);
}

.page-about .era__stage {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.page-about .era__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: -0.01em;
}

.page-about .era__text {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.8;
  color: #C4D6CC;
}

.page-about .era--current {
  border-left: 2px solid var(--lime-signal);
  padding-left: clamp(12px, 2vw, 20px);
}

.page-about .era--current .era__stage {
  color: var(--lime-signal);
}

.page-about .era-delta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
  padding: 14px 18px;
  background-color: var(--moss-panel);
  border: 1px dashed var(--grid-hairline);
}

.page-about .era-delta__from {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-muted);
}

.page-about .era-delta__arrow {
  color: var(--amber-score);
  font-family: var(--font-data);
}

.page-about .era-delta__to {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 24px);
  color: var(--lime-signal);
}

/* ---------- 04 栏目地图 ---------- */
.page-about .map-stage {
  position: relative;
  padding: clamp(20px, 3.4vw, 34px);
  background-color: var(--moss-panel);
  border: 1px solid var(--grid-hairline);
  overflow: hidden;
}

.page-about .map-stage__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .map-list {
  position: relative;
  margin: 0;
  padding: 0 0 0 24px;
  list-style: none;
  border-left: 1px solid var(--grid-hairline);
}

.page-about .map-node {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--grid-hairline);
}

.page-about .map-node:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .map-node::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 24px;
  width: 9px;
  height: 9px;
  background-color: var(--lime-signal);
  box-shadow: 0 0 10px rgba(200, 255, 77, 0.5);
}

.page-about .map-node__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-decoration: none;
}

.page-about .map-node__name:hover {
  color: var(--lime-signal);
}

.page-about .map-node__route {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-live);
}

.page-about .map-node__desc {
  margin: 0;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.78;
  color: #B9CDC2;
}

/* ---------- 05 原则 ---------- */
.page-about .principles {
  border-top: 1px solid var(--grid-hairline);
}

.page-about .principle {
  padding: clamp(16px, 2.6vw, 22px) 0;
  border-bottom: 1px solid var(--grid-hairline);
}

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

.page-about .principle__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 4px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 28px);
  letter-spacing: -0.01em;
}

.page-about .principle__num {
  flex: none;
  padding: 2px 7px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--lime-signal);
  border: 1px solid var(--lime-signal);
  border-radius: var(--radius);
}

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

.page-about .principle__mark {
  flex: none;
  margin-left: auto;
  width: 11px;
  height: 11px;
  border-right: 1px solid var(--text-muted);
  border-bottom: 1px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 180ms var(--ease);
}

.page-about .principle__trigger[aria-expanded="true"] .principle__mark {
  transform: rotate(-135deg);
}

.page-about .principle__text {
  max-width: 40ch;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #C4D6CC;
}

.page-about .principle__panel {
  margin-top: 14px;
  padding: 16px 18px;
  background-color: var(--moss-panel);
  border-left: 2px solid var(--lime-signal);
}

.page-about .principle__panel[hidden] {
  display: none;
}

.page-about .principle__panel p {
  max-width: 40ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #B9CDC2;
}

.page-about .principle__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px !important;
}

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

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

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

  .page-about .era {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 20px;
  }

  .page-about .era__stage {
    grid-row: 1;
  }

  .page-about .era__title {
    grid-column: 2;
  }

  .page-about .era__text {
    grid-column: 2;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 220px minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
    border-top: 1px solid var(--grid-hairline);
  }

  .page-about .about-index__link {
    width: 100%;
    border: 0;
    border-bottom: 1px solid var(--grid-hairline);
    border-left: 2px solid transparent;
    background-color: transparent;
    border-radius: 0;
  }

  .page-about .about-index__link:hover {
    border-left-color: var(--lime-signal);
    color: var(--lime-signal);
  }

  .page-about .workflow {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .workflow__figure {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>