.page-about {
  --about-slant: 6deg;
  --about-gap: 26px;
  --about-pad: 52px;
  background: var(--im-paper-50);
  color: var(--im-ink-900);
  font-family: var(--im-font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--im-font-display);
  letter-spacing: -0.01em;
  line-height: 1.14;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(2rem, 7.4vw, 3.4rem);
  font-weight: 700;
}

.page-about h2 {
  font-size: clamp(1.5rem, 4.4vw, 2.2rem);
  font-weight: 700;
}

.page-about h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.page-about p {
  margin: 0;
  line-height: 1.82;
}

.page-about .about-crumbs {
  background: var(--im-paper-50);
  border-bottom: 1px solid var(--im-line);
}

.page-about .about-crumbs .container {
  padding-block: 10px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  color: var(--im-gray-500);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--im-line-strong);
}

.page-about .breadcrumbs a {
  color: var(--im-ink-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  border-bottom-color: var(--im-teal-400);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--im-white-ink);
  background:
    radial-gradient(120% 100% at 82% 0%, rgba(79, 227, 193, 0.18), transparent 62%),
    linear-gradient(180deg, var(--im-ink-900) 0%, var(--im-ink-700) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42px;
  background: var(--im-paper-50);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  padding-block: 38px 76px;
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-lead {
  color: rgba(233, 243, 239, 0.86);
  font-size: 1rem;
  max-width: 46ch;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
  margin: 4px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--im-line-dark);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-facts b {
  font-family: var(--im-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--im-teal-400);
  line-height: 1.1;
}

.page-about .about-facts span {
  font-size: 12px;
  color: rgba(233, 243, 239, 0.62);
  line-height: 1.5;
}

.page-about .about-unit {
  font-size: 0.62em;
  margin-left: 3px;
  color: inherit;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-hero__media {
  margin: 0;
  align-self: stretch;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--im-radius-m);
}

/* 起点 */
.page-about .about-origin {
  background: var(--im-paper-50);
  padding-block: var(--about-pad);
}

.page-about .about-origin__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-origin__main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-origin__main .label-chip {
  align-self: flex-start;
}

.page-about .about-inline-link {
  display: inline-block;
  color: var(--im-ink-500);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--im-teal-400);
  padding-bottom: 2px;
  transition: color 160ms var(--im-ease), border-color 160ms var(--im-ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--im-ink-900);
  border-bottom-color: var(--im-orange-500);
}

.page-about .about-origin__aside {
  padding: 22px 20px;
  background: var(--im-paper-100);
  border: 1px solid var(--im-line-strong);
  border-radius: var(--im-radius-m);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  transform: rotate(-0.6deg);
}

.page-about .about-aside__num {
  font-family: var(--im-font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--im-orange-500);
  line-height: 1;
}

.page-about .about-aside__title {
  font-family: var(--im-font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.page-about .about-aside__text {
  font-size: 13.5px;
  color: var(--im-ink-500);
  line-height: 1.75;
}

/* 三条路径 */
.page-about .about-paths {
  background: var(--im-data-800);
  color: var(--im-white-ink);
  padding-block: var(--about-pad);
}

.page-about .about-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
}

.page-about .about-head .label-chip {
  align-self: flex-start;
}

.page-about .about-head__lead {
  color: var(--im-gray-500);
  font-size: 0.95rem;
  max-width: 62ch;
}

.page-about .about-head--dark .about-head__lead {
  color: rgba(233, 243, 239, 0.66);
}

.page-about .about-paths__grid {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-about .about-paths__figure {
  margin: 0;
  padding: 16px 14px 12px;
  border: 1px solid var(--im-line-dark);
  border-radius: var(--im-radius-m);
  background: rgba(6, 17, 14, 0.4);
}

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

.page-about .about-map__box {
  fill: rgba(79, 227, 193, 0.06);
  stroke: var(--im-line-dark);
  stroke-width: 1.2;
  transition: stroke 170ms var(--im-ease), fill 170ms var(--im-ease);
}

.page-about .about-map__link {
  fill: none;
  stroke: rgba(169, 243, 226, 0.34);
  stroke-width: 1.2;
}

.page-about .about-map__label {
  fill: var(--im-white-ink);
  font-family: var(--im-font-display);
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-map__sub {
  fill: rgba(233, 243, 239, 0.55);
  font-family: var(--im-font-body);
  font-size: 11px;
}

.page-about .about-map__node:hover .about-map__box,
.page-about .about-map__node:focus-within .about-map__box {
  stroke: var(--im-teal-400);
  fill: rgba(79, 227, 193, 0.16);
}

.page-about .about-map__caption {
  margin-top: 10px;
  font-size: 11.5px;
  color: rgba(233, 243, 239, 0.5);
  letter-spacing: 0.02em;
}

.page-about .about-path-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-path {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 16px 16px 14px;
  border: 1px solid var(--im-line-dark);
  border-radius: var(--im-radius-m);
  color: inherit;
  text-decoration: none;
  transition: transform 180ms var(--im-ease), border-color 180ms var(--im-ease), background 180ms var(--im-ease);
}

.page-about .about-path:hover,
.page-about .about-path:focus-visible {
  transform: translateY(-2px);
  border-color: var(--im-teal-400);
  background: rgba(79, 227, 193, 0.07);
}

.page-about .about-path__tag {
  font-family: var(--im-font-mono);
  font-size: 0.82rem;
  color: var(--im-orange-500);
  letter-spacing: 0.06em;
  padding-top: 3px;
}

.page-about .about-path__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-path__body strong {
  font-family: var(--im-font-display);
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}

.page-about .about-path__body span {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(233, 243, 239, 0.72);
}

.page-about .about-paths__note {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--im-teal-400);
  font-size: 13.5px;
  color: rgba(233, 243, 239, 0.7);
}

/* 版本时间轴 */
.page-about .about-time {
  position: relative;
  background:
    radial-gradient(90% 70% at 12% 0%, rgba(79, 227, 193, 0.14), transparent 62%),
    var(--im-ink-900);
  color: var(--im-white-ink);
  padding-block: var(--about-pad);
}

.page-about .about-time::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 34px;
  background: var(--im-data-800);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.page-about .about-jump a {
  font-family: var(--im-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--im-teal-200);
  border: 1px solid var(--im-line-dark);
  border-radius: var(--im-radius-pill);
  padding: 6px 14px;
  transition: background 160ms var(--im-ease), color 160ms var(--im-ease), border-color 160ms var(--im-ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  background: var(--im-teal-200);
  color: var(--im-ink-900);
  border-color: var(--im-teal-200);
}

.page-about .about-time__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-verts {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-verts::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 8px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, rgba(169, 243, 226, 0.4), rgba(169, 243, 226, 0.08));
}

.page-about .about-vert {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 22px;
  scroll-margin-top: 96px;
}

.page-about .about-vert__pin {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  border-radius: var(--im-radius-pill);
  border: 1px solid var(--im-line-dark);
  background: var(--im-ink-900);
  color: var(--im-teal-200);
  font-family: var(--im-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.page-about .about-vert__card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 18px 16px;
  background: rgba(233, 243, 239, 0.035);
  border: 1px solid var(--im-line-dark);
  border-radius: var(--im-radius-m);
  color: var(--im-white-ink);
  box-shadow: none;
  transition: border-color 180ms var(--im-ease), background 180ms var(--im-ease), transform 180ms var(--im-ease);
}

.page-about .about-vert__card .label-chip {
  align-self: flex-start;
}

.page-about .about-vert__card p {
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(233, 243, 239, 0.72);
}

.page-about .about-vert--now .about-vert__card {
  border-color: rgba(79, 227, 193, 0.6);
  background: rgba(79, 227, 193, 0.08);
  box-shadow: 5px 5px 0 rgba(79, 227, 193, 0.16);
}

.page-about .about-vert--now .about-vert__pin {
  border-color: var(--im-teal-400);
  color: var(--im-ink-900);
  background: var(--im-teal-400);
}

.page-about .about-vert:target .about-vert__card {
  border-color: var(--im-teal-400);
  transform: translateY(-2px);
}

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

.page-about .about-time__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--im-radius-m);
}

/* 覆盖地区 */
.page-about .about-reach {
  background: var(--im-paper-100);
  padding-block: var(--about-pad);
}

.page-about .about-reach__media {
  margin: 0 0 30px;
}

.page-about .about-reach__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--im-radius-m);
}

.page-about .about-reach__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-reach__text {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-reach__text .label-chip {
  align-self: flex-start;
}

.page-about .about-reach__text p {
  font-size: 15px;
  color: var(--im-ink-500);
}

.page-about .about-districts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-district {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 10px;
  background: var(--im-paper-50);
  border: 1px solid var(--im-line-strong);
  border-radius: var(--im-radius-s);
  transition: transform 160ms var(--im-ease), border-color 160ms var(--im-ease), background 160ms var(--im-ease);
}

.page-about .about-district:hover,
.page-about .about-district:focus-within {
  transform: translateY(-2px);
  border-color: var(--im-teal-400);
  background: var(--im-white-ink);
}

.page-about .about-district__name {
  font-family: var(--im-font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--im-ink-900);
}

.page-about .about-district__note {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--im-orange-500);
  font-weight: 500;
}

.page-about .about-district--hot {
  background: var(--im-ink-700);
  border-color: var(--im-ink-500);
}

.page-about .about-district--hot .about-district__name {
  color: var(--im-white-ink);
}

.page-about .about-district--hot:hover,
.page-about .about-district--hot:focus-within {
  background: var(--im-ink-900);
}

/* 维护节奏 */
.page-about .about-team {
  background: var(--im-paper-50);
  padding-block: var(--about-pad);
}

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

.page-about .about-team__text {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-team__text .label-chip {
  align-self: flex-start;
}

.page-about .about-team__text p {
  font-size: 15px;
  color: var(--im-ink-500);
}

.page-about .about-rhythm {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px;
  background: var(--im-data-800);
  border: 1px solid var(--im-ink-500);
  border-radius: var(--im-radius-m);
}

.page-about .about-rhythm__num {
  font-family: var(--im-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--im-teal-400);
  line-height: 1.1;
}

.page-about .about-rhythm__label {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(233, 243, 239, 0.74);
}

/* 内容来源 */
.page-about .about-sources {
  background: var(--im-paper-100);
  padding-block: var(--about-pad);
}

.page-about .about-sources__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-docs {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-doc {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--im-line);
}

.page-about .about-doc__bar {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  border-radius: var(--im-radius-pill);
  background: var(--im-ink-500);
}

.page-about .about-doc__bar--pre {
  width: 37.5%;
  background: var(--im-teal-400);
}

.page-about .about-doc__bar--post {
  width: 43.75%;
  background: var(--im-teal-200);
}

.page-about .about-doc__bar--rule {
  width: 18.75%;
  background: var(--im-orange-500);
}

.page-about .about-doc__name {
  font-family: var(--im-font-display);
  font-weight: 700;
  font-size: 1rem;
}

.page-about .about-doc__count {
  font-family: var(--im-font-mono);
  font-size: 0.86rem;
  color: var(--im-ink-500);
}

.page-about .about-sources__note {
  padding: 22px 20px;
  background: var(--im-paper-50);
  border: 1px solid var(--im-line-strong);
  border-radius: var(--im-radius-m);
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.page-about .about-sources__big {
  font-family: var(--im-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--im-ink-900);
  line-height: 1;
}

.page-about .about-sources__caption {
  font-family: var(--im-font-display);
  font-weight: 700;
  font-size: 1rem;
}

.page-about .about-sources__text {
  font-size: 13.5px;
  color: var(--im-ink-500);
}

/* 收尾 */
.page-about .about-cta {
  background:
    linear-gradient(120deg, rgba(79, 227, 193, 0.16), transparent 58%),
    var(--im-ink-900);
  color: var(--im-white-ink);
  padding-block: var(--about-pad);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta__inner > div {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-cta__inner .label-chip {
  align-self: flex-start;
}

.page-about .about-cta__inner p {
  color: rgba(233, 243, 239, 0.74);
  font-size: 15px;
  max-width: 56ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

@media (min-width: 640px) {
  .page-about .about-districts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rhythm {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-pad: 72px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.45fr 0.9fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-paths__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 32px;
    align-items: center;
  }

  .page-about .about-time__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-sources__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

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

@media (min-width: 980px) {
  .page-about h1 {
    font-size: clamp(2.4rem, 4.4vw, 3.5rem);
  }

  .page-about .about-hero__grid {
    grid-template-columns: 38% 62%;
    gap: 0;
    align-items: center;
    padding-block: 58px 96px;
  }

  .page-about .about-hero__copy {
    padding-right: 38px;
  }

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

  .page-about .about-hero__media::before {
    content: "";
    position: absolute;
    left: -26px;
    top: -34px;
    bottom: -34px;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(79, 227, 193, 0.55), transparent);
    transform: rotate(var(--about-slant));
    transform-origin: top center;
  }

  .page-about .about-hero__media img {
    aspect-ratio: 16 / 10;
    height: 100%;
  }

  .page-about .about-vert {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 18px;
    padding-bottom: 24px;
  }

  .page-about .about-verts::before {
    left: 31px;
  }

  .page-about .about-vert__pin {
    height: 34px;
  }

  .page-about .about-vert__card {
    padding: 20px 22px;
  }

  .page-about .about-reach__text p,
  .page-about .about-team__text p {
    font-size: 15.5px;
  }

  .page-about .about-inline-link {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }

  .page-about .about-path:hover,
  .page-about .about-path:focus-visible,
  .page-about .about-district:hover,
  .page-about .about-district:focus-within,
  .page-about .about-vert:target .about-vert__card {
    transform: none;
  }
}
<<<PAGE_CSS_DONE>>>
</main>