.page-about {
  color: var(--chalk-white);
  padding-bottom: clamp(32px, 5vw, 64px);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.4vw, 28px);
}

.page-about .about-crumb .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--mist-slate);
}

.page-about .about-crumb .breadcrumbs__link {
  color: var(--mist-slate);
  text-decoration: none;
}

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

.page-about .about-crumb .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--grid-mint);
}

.page-about .about-crumb .breadcrumbs__current {
  color: var(--lime-soft);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(14px, 2vw, 22px);
  padding: clamp(24px, 4vw, 52px) 0 clamp(28px, 4vw, 56px);
  border-top: var(--line-soft);
  border-bottom: var(--line-soft);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(30, 90, 69, 0.55) 0%, rgba(6, 23, 19, 0) 62%),
    radial-gradient(70% 60% at 88% 8%, rgba(201, 255, 63, 0.14) 0%, rgba(6, 23, 19, 0) 60%);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

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

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime-signal);
  margin: 0 0 14px;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--chalk-white);
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 28px;
  color: #C9DCD3;
  max-width: 60ch;
  margin: 0 0 24px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .about-stat {
  border: var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(11, 42, 32, 0.66);
  padding: 12px 14px;
}

.page-about .about-stat__num {
  display: block;
  font-size: 24px;
  line-height: 30px;
  font-variant-numeric: tabular-nums;
  color: var(--lime-signal);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 14px;
  margin-left: 2px;
  color: var(--lime-soft);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 18px;
  color: var(--mist-slate);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-shot {
  margin: 0;
  border: var(--line-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--tunnel-green);
}

.page-about .about-shot img {
  width: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.page-about .about-shot figcaption {
  padding: 10px 16px 14px;
  font-size: 12px;
  line-height: 20px;
  color: var(--mist-slate);
  border-top: var(--line-soft);
  background: rgba(6, 23, 19, 0.6);
}

/* 主体：左侧导读 + 右侧长叙事 */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
  padding-top: clamp(24px, 4vw, 52px);
}

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

.page-about .about-toc__title {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist-slate);
  margin: 0 0 10px;
}

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

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: var(--line-soft);
  border-radius: var(--r-pill);
  font-size: 13px;
  line-height: 18px;
  color: var(--mist-slate);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-toc__link .mono {
  color: var(--grid-mint);
  font-size: 11px;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--chalk-white);
  border-color: var(--lime-signal);
  background: rgba(201, 255, 63, 0.1);
}

.page-about .about-toc__link:hover .mono,
.page-about .about-toc__link:focus-visible .mono {
  color: var(--lime-signal);
}

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

.page-about .about-sec {
  padding: clamp(22px, 3vw, 40px) 0 clamp(26px, 3.4vw, 44px);
  border-top: var(--line-soft);
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-sec__head {
  display: flex;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 16px;
}

.page-about .about-sec__num {
  font-size: 13px;
  color: var(--lime-signal);
  letter-spacing: 0.06em;
  padding-top: 6px;
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--chalk-white);
}

.page-about .prose p {
  color: #C9DCD3;
  font-size: 16px;
  line-height: 28px;
  max-width: 66ch;
  margin: 0 0 14px;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* 服务人群提示块 */
.page-about .about-callout {
  margin-top: 20px;
  border: 1px solid rgba(201, 255, 63, 0.34);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(201, 255, 63, 0.12), rgba(11, 42, 32, 0.9));
  padding: clamp(16px, 2.4vw, 24px);
}

.page-about .about-callout__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime-soft);
}

.page-about .about-callout__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-callout__list li {
  font-size: 14px;
  line-height: 24px;
  color: #C9DCD3;
  padding-left: 16px;
  position: relative;
}

.page-about .about-callout__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime-signal);
}

.page-about .about-callout__list strong {
  color: var(--chalk-white);
  font-weight: 700;
}

/* 团队构成条 */
.page-about .team-bars {
  display: grid;
  gap: 10px;
  margin: 20px 0 22px;
}

.page-about .team-bar {
  border: var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(18, 59, 46, 0.62);
  padding: 12px 14px 14px;
}

.page-about .team-bar__top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--chalk-white);
}

.page-about .team-bar__top .mono {
  color: var(--mist-slate);
  font-variant-numeric: tabular-nums;
}

.page-about .team-bar__track {
  display: block;
  height: 8px;
  margin-top: 9px;
  border-radius: var(--r-pill);
  background: #0E3527;
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  background: var(--lime-signal);
}

.page-about .team-bar__fill--fe {
  background: var(--lime-soft);
}

.page-about .team-bar__fill--content {
  background: var(--amber-card);
}

.page-about .team-bar__fill--cs {
  background: var(--mist-slate);
}

/* 团队折叠 */
.page-about .team-fold {
  border: var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(11, 42, 32, 0.72);
  margin-bottom: 10px;
  overflow: hidden;
}

.page-about .team-fold__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-fold__summary::-webkit-details-marker {
  display: none;
}

.page-about .team-fold__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--lime-signal);
  font-size: 16px;
}

.page-about .team-fold[open] .team-fold__summary::after {
  content: "–";
}

.page-about .team-fold__num {
  font-size: 12px;
  color: var(--grid-mint);
}

.page-about .team-fold__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--chalk-white);
}

.page-about .team-fold__count {
  font-size: 12px;
  color: var(--mist-slate);
}

.page-about .team-fold[open] .team-fold__summary {
  border-bottom: var(--line-soft);
}

.page-about .team-fold__body {
  padding: 12px 16px 16px;
}

.page-about .team-fold__body p {
  margin: 0;
  font-size: 14px;
  line-height: 25px;
  color: #C9DCD3;
  max-width: 64ch;
}

.page-about .about-shot--inline {
  margin-top: 22px;
}

/* 校对流程 */
.page-about .flow {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  border: var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(18, 59, 46, 0.5);
}

.page-about .flow__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--r-sm);
  background: rgba(201, 255, 63, 0.14);
  color: var(--lime-signal);
  font-size: 12px;
}

.page-about .flow__step strong {
  display: block;
  font-size: 15px;
  color: var(--chalk-white);
  margin-bottom: 4px;
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 24px;
  color: #C9DCD3;
}

.page-about .status-block {
  margin-top: 22px;
  border: var(--line-soft);
  border-radius: var(--r-lg);
  padding: clamp(14px, 2vw, 20px);
  background: rgba(11, 42, 32, 0.8);
}

.page-about .status-block__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist-slate);
}

.page-about .status-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .status-legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  line-height: 22px;
  color: #C9DCD3;
}

/* 版本时间线 */
.page-about .versions {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  position: relative;
}

.page-about .versions::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--grid-mint);
}

.page-about .versions__item {
  position: relative;
  padding-left: 38px;
  margin-bottom: 10px;
}

.page-about .versions__dot {
  position: absolute;
  left: 9px;
  top: 18px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--lime-signal);
  box-shadow: 0 0 0 3px rgba(201, 255, 63, 0.18);
}

.page-about .ver {
  border: var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(11, 42, 32, 0.72);
  transition: border-color 0.2s var(--ease);
}

.page-about .ver:hover,
.page-about .ver:focus-within {
  border-color: var(--lime-signal);
}

.page-about .ver summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .ver summary::-webkit-details-marker {
  display: none;
}

.page-about .ver__tag {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime-signal);
}

.page-about .ver__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--chalk-white);
}

.page-about .ver__body {
  padding: 0 14px 14px;
  font-size: 14px;
  line-height: 24px;
  color: #C9DCD3;
  max-width: 64ch;
}

/* 专题内容 */
.page-about .topics-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.page-about .topic-card {
  border: var(--line-soft);
  border-radius: var(--r-lg);
  background: rgba(18, 59, 46, 0.66);
  padding: 16px 18px;
}

.page-about .topic-card__tag {
  display: inline-block;
  margin: 0 0 8px;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(201, 255, 63, 0.4);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lime-soft);
}

.page-about .topic-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 26px;
  color: var(--chalk-white);
}

.page-about .topic-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 24px;
  color: #C9DCD3;
}

.page-about .about-note {
  margin-top: 18px;
  padding: 16px 18px;
  border-left: 2px solid var(--lime-signal);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(11, 42, 32, 0.7);
}

.page-about .about-note p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 25px;
  color: #C9DCD3;
  max-width: 66ch;
}

.page-about .about-note p:last-child {
  margin-bottom: 0;
}

.page-about .about-note__link a {
  color: var(--lime-signal);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-note__link a:hover,
.page-about .about-note__link a:focus-visible {
  text-decoration: underline;
}

/* 运营地点 */
.page-about .place {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
  align-items: start;
}

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

.page-about .place__facts {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: var(--line-soft);
}

.page-about .fact-row {
  display: grid;
  gap: 2px;
  padding: 10px 0;
  border-bottom: var(--line-soft);
}

.page-about .fact-row__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-slate);
}

.page-about .fact-row__value {
  font-size: 14px;
  line-height: 22px;
  color: var(--chalk-white);
  word-break: break-word;
}

.page-about .place__copy {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .copy-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(201, 255, 63, 0.42);
  background: transparent;
  color: var(--lime-soft);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .copy-chip:hover,
.page-about .copy-chip:focus-visible {
  background: rgba(201, 255, 63, 0.14);
  color: var(--chalk-white);
}

.page-about .copy-chip[data-copied] {
  background: var(--lime-signal);
  color: var(--pitch-ink);
  border-color: var(--lime-signal);
}

/* 结尾入口 */
.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: 8px;
  padding: clamp(18px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(201, 255, 63, 0.34);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(201, 255, 63, 0.18) 0%, rgba(6, 23, 19, 0) 60%),
    rgba(11, 42, 32, 0.9);
}

.page-about .about-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.25;
  color: var(--chalk-white);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14px;
  line-height: 24px;
  color: #C9DCD3;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-about .about-backtop {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist-slate);
  text-decoration: none;
  padding: 8px 4px;
}

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

/* 断点 */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .fact-row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-shot--hero img {
    aspect-ratio: 3 / 2;
  }

  .page-about .place {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 18px);
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 6px;
  }

  .page-about .about-toc__link {
    justify-content: flex-start;
    border-color: transparent;
    border-radius: var(--r-sm);
    padding: 8px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .ver,
  .page-about .copy-chip {
    transition: none;
  }
}
<<<END>>>