.page-about {
  --about-rule: 1px solid var(--line);
  --about-gap: clamp(18px, 3.5vw, 44px);
  background-color: var(--ink-800);
  color: var(--mist);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background-color: var(--ink-800);
  background-image:
    linear-gradient(to right, rgba(27, 70, 58, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 70, 58, 0.55) 1px, transparent 1px);
  background-size: 64px 64px;
  border-bottom: var(--about-rule);
  padding-block: clamp(20px, 4vw, 44px) clamp(30px, 5vw, 64px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

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

.page-about .about-hero__lead .eyebrow {
  margin-top: 14px;
  color: var(--mint);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 3.9rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__intro {
  color: var(--sage);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.78;
  max-width: 62ch;
  margin: 18px 0 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--line);
  border: var(--about-rule);
  margin-top: clamp(20px, 3.5vw, 30px);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background-color: var(--ink-700);
  padding: clamp(10px, 2.2vw, 18px);
  min-width: 0;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 3.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-hero__stat:nth-child(3) .stat-num {
  color: var(--magenta);
}

.page-about .stat-label {
  font-size: clamp(0.68rem, 1.7vw, 0.78rem);
  line-height: 1.45;
  color: var(--sage);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3.5vw, 28px);
}

.page-about .about-hero__media {
  margin: 0;
  border: var(--about-rule);
  box-shadow: var(--shadow-hard);
  min-width: 0;
}

.page-about .about-hero__media .media__img,
.page-about .about-inline-media .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__media .media__caption,
.page-about .about-inline-media .media__caption {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--sage);
  padding: 8px 10px;
  border-top: var(--about-rule);
  background-color: var(--ink-900);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-block: clamp(24px, 4vw, 48px) clamp(44px, 7vw, 88px);
}

.page-about .about-rail {
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
  margin-bottom: clamp(20px, 3vw, 32px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--mint);
  margin: 12px 0 4px;
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 6px 0 12px;
}

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 11px;
  border: var(--about-rule);
  color: var(--sage);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--mist);
  border-color: var(--cyan);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

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

/* ---------- 章节 ---------- */
.page-about .about-block {
  border-top: var(--about-rule);
  padding-block: clamp(26px, 4vw, 46px);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

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

.page-about .about-block__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-block h2 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 4.2vw, 2.35rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 10px 0 1.1rem;
  text-wrap: balance;
}

.page-about .about-block__body > p {
  color: var(--sage);
  line-height: 1.78;
  max-width: 70ch;
  margin: 0 0 1rem;
}

.page-about .about-block__body strong {
  color: var(--mint);
  font-weight: 600;
}

.page-about .about-block__lead {
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

/* ---------- 起点与定位 ---------- */
.page-about .origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 36px);
}

.page-about .origin__copy p {
  color: var(--sage);
  line-height: 1.78;
  margin: 0 0 1rem;
}

.page-about .origin__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border: var(--about-rule);
  border-left: 3px solid var(--cyan);
  background-color: var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .origin__fact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 13px 16px;
  border-bottom: var(--about-rule);
  color: var(--sage);
  font-size: 0.9rem;
}

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

.page-about .origin__fact-key {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
  flex: 0 0 auto;
}

/* ---------- 团队矩阵 ---------- */
.page-about .team__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .team__controls .tag {
  cursor: pointer;
  background: transparent;
  border: var(--about-rule);
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  padding: 7px 12px;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.page-about .team__controls .tag:hover {
  border-color: var(--cyan);
  color: var(--mist);
}

.page-about .team__controls .tag[aria-pressed="true"] {
  background-color: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background-color: var(--line);
  border: var(--about-rule);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .team__cell {
  background-color: var(--ink-800);
  padding: 18px;
  min-width: 0;
  transition: background-color 0.18s ease;
}

.page-about .team__cell:hover {
  background-color: var(--ink-700);
}

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

.page-about .team__idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--magenta);
  margin: 0 0 8px;
}

.page-about .team__name {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
  color: var(--mist);
}

.page-about .team__text {
  color: var(--sage);
  font-size: 0.88rem;
  line-height: 1.72;
  margin: 0;
}

.page-about .ops-notes {
  margin-top: 18px;
  border-left: 2px solid var(--cyan);
  padding: 4px 0 4px 14px;
}

.page-about .ops-notes p {
  margin: 0;
  color: var(--sage);
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-about .about-inline-media {
  margin: clamp(20px, 3.5vw, 32px) 0 0;
  border: var(--about-rule);
  max-width: 320px;
  min-width: 0;
}

.page-about .about-inline-media--wide {
  max-width: 100%;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--cyan);
  background-color: var(--ink-800);
  transform: rotate(45deg);
  transition: background-color 0.18s ease;
}

.page-about .timeline__item:hover::before {
  background-color: var(--cyan);
}

.page-about .timeline__stage {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--mint);
  margin: 0 0 6px;
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--mist);
  transition: color 0.18s ease;
}

.page-about .timeline__item:hover .timeline__title {
  color: var(--cyan);
}

.page-about .timeline__text {
  color: var(--sage);
  font-size: 0.9rem;
  line-height: 1.72;
  max-width: 64ch;
  margin: 0;
}

/* ---------- 覆盖规模 ---------- */
.page-about .scope {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background-color: var(--line);
  border: var(--about-rule);
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .scope__item {
  background-color: var(--ink-700);
  padding: 16px 18px;
  min-width: 0;
}

.page-about .scope__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .scope__item:nth-child(2) .scope__num {
  color: var(--magenta);
}

.page-about .scope__unit {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--mint);
  margin-top: 6px;
}

.page-about .scope__text {
  color: var(--sage);
  font-size: 0.85rem;
  line-height: 1.7;
  margin: 10px 0 0;
}

/* ---------- 图例 ---------- */
.page-about .legend {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .legend__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 13px 0;
  border-bottom: var(--about-rule);
}

.page-about .legend__dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  align-self: center;
  transform: rotate(45deg);
}

.page-about .legend__dot--cyan {
  background-color: var(--cyan);
}

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

.page-about .legend__dot--magenta {
  background-color: var(--magenta);
}

.page-about .legend__dot--warn {
  background-color: var(--warn);
}

.page-about .legend__key {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--mist);
  flex: 0 0 auto;
}

.page-about .legend__val {
  color: var(--sage);
  font-size: 0.87rem;
  line-height: 1.65;
}

.page-about .legend__note {
  color: var(--sage);
  font-size: 0.88rem;
  line-height: 1.75;
  margin: 16px 0 0;
  max-width: 68ch;
}

/* ---------- 服务与联系 ---------- */
.page-about .service-rows {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .service-rows__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 15px 0;
  border-bottom: var(--about-rule);
}

.page-about .service-rows__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  flex: 0 0 auto;
  min-width: 76px;
}

.page-about .service-rows__value {
  color: var(--mist);
  font-weight: 600;
  font-size: 0.95rem;
  word-break: break-word;
  min-width: 0;
}

.page-about .service-rows__note {
  flex-basis: 100%;
  color: var(--sage);
  font-size: 0.85rem;
  line-height: 1.7;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .origin {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-rail {
    border-top: 0;
    border-bottom: 0;
    overflow: visible;
    margin-bottom: 0;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-rail__title {
    margin-top: 0;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-rail__list a {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    white-space: normal;
    font-size: 0.85rem;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--cyan);
  }

  .page-about .about-block {
    padding-block: clamp(34px, 3.4vw, 54px);
  }

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

@media (min-width: 1200px) {
  .page-about .about-inline-media {
    max-width: 360px;
  }
}
<<<END>>>