.page-about {
  --about-rail-w: 240px;
  --about-cut: 22px;
  position: relative;
  overflow-x: clip;
  color: var(--paper);
  background: var(--ink-900);
  font-family: var(--font-body);
  padding-bottom: 8px;
}

.page-about .breadcrumb {
  padding: 18px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 24px 0 52px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -14% -20% auto auto;
  width: 82%;
  height: 92%;
  background: radial-gradient(circle at 72% 18%, rgba(32, 227, 210, 0.18), transparent 64%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(32, 227, 210, 0) 62%);
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 9vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--paper);
}

.page-about .about-hero__accent {
  color: var(--cyan);
  display: inline-block;
  position: relative;
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.09em;
  background: var(--orange);
  opacity: 0.85;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .about-hero__paths {
  margin-top: 28px;
  display: grid;
  gap: 10px;
}

.page-about .path-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  color: var(--paper);
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .path-chip:hover,
.page-about .path-chip:focus-visible {
  background: var(--glass-strong);
  border-color: var(--line-cyan);
  border-left-color: var(--orange);
  transform: translateX(3px);
}

.page-about .path-chip__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .path-chip__label {
  font-size: 15px;
  font-weight: 600;
}

.page-about .path-chip__arrow {
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--mist);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}

.page-about .about-hero__figure .media-frame img,
.page-about .crew__figure .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  max-width: 100%;
}

.page-about .about-hero__badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: 60px 0 64px;
  background: var(--ink-850);
  clip-path: polygon(0 var(--about-cut), 100% 0, 100% 100%, 0 100%);
}

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

.page-about .about-rail {
  align-self: start;
  padding: 14px 16px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-about .about-rail .page-toc__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-rail .page-toc__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 10px 0 0;
  padding: 0 0 4px;
  list-style: none;
}

.page-about .rail-link {
  display: block;
  white-space: nowrap;
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--paper);
  background: rgba(32, 227, 210, 0.1);
  border-left-color: var(--cyan);
}

.page-about .rail-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(32, 227, 210, 0.08);
}

.page-about .about-timeline__head {
  margin-bottom: 26px;
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-lead {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .stage-row {
  position: relative;
  padding-left: 24px;
}

.page-about .stage-row + .stage-row {
  margin-top: 22px;
}

.page-about .stage-row::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: -22px;
  width: 2px;
  background: linear-gradient(180deg, rgba(32, 227, 210, 0.5), rgba(32, 227, 210, 0.05));
}

.page-about .stage-row:last-child::before {
  display: none;
}

.page-about .stage-row__dot {
  position: absolute;
  left: 0;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(32, 227, 210, 0.16);
}

.page-about .stage {
  position: relative;
  overflow: hidden;
  padding: 22px 18px 24px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .stage::after {
  content: "";
  position: absolute;
  inset: auto -20% -70% auto;
  width: 70%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 106, 42, 0.16), transparent 70%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .stage:hover,
.page-about .stage:focus-within {
  border-color: var(--line-cyan);
  background: var(--glass-strong);
  transform: translateY(-2px);
}

.page-about .stage__big {
  position: absolute;
  right: 10px;
  top: -12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(64px, 13vw, 108px);
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(246, 242, 233, 0.06);
  pointer-events: none;
}

.page-about .stage__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .stage__title {
  position: relative;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .stage__body {
  position: relative;
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .stage__points {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stage__point {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .stage:hover .stage__point,
.page-about .stage:focus-within .stage__point {
  color: var(--amber);
  border-color: rgba(255, 176, 32, 0.36);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  padding: 64px 0 56px;
}

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

.page-about .crew__note {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--steel);
}

.page-about .author-array {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .author-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  background: rgba(22, 50, 74, 0.42);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 12.5px;
  color: var(--steel);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .author-chip:hover {
  border-color: var(--line-cyan);
  color: var(--paper);
}

.page-about .author-chip__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

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

.page-about .crew__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network {
  position: relative;
  overflow: hidden;
  padding: 64px 0;
  background: var(--ink-800);
}

.page-about .network__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.3;
}

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

.page-about .network__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 17, 31, 0.92), rgba(7, 17, 31, 0.74) 46%, rgba(7, 17, 31, 0.95));
}

.page-about .network__inner {
  position: relative;
  z-index: 1;
}

.page-about .network__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 26px 0 0;
}

.page-about .stat-block {
  padding: 14px 13px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  border-radius: var(--radius);
}

.page-about .stat-block__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 4.4vw, 30px);
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .stat-block__label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .city-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .city-node {
  padding: 10px 12px;
  background: rgba(13, 27, 46, 0.74);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .city-node:hover {
  border-color: var(--line-cyan);
  background: var(--glass);
}

.page-about .city-node__name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .city-node__type {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.page-about .city-node:hover .city-node__type {
  color: var(--cyan);
}

.page-about .network__note {
  margin: 22px 0 0;
  max-width: 52ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-pace {
  padding: 64px 0 56px;
  background: var(--ink-900);
  position: relative;
}

.page-about .about-pace::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--cyan), var(--amber), var(--orange));
  opacity: 0.7;
}

.page-about .pace-list {
  margin-top: 26px;
}

.page-about .pace-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .pace-row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .pace-row__figure {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
}

.page-about .pace-row__num {
  font-weight: 700;
  font-size: clamp(26px, 5vw, 34px);
  letter-spacing: -0.03em;
  color: var(--amber);
}

.page-about .pace-row__unit {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--mist);
}

.page-about .pace-row__title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .pace-row__text {
  margin: 5px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  padding: 12px 0 64px;
  background: var(--ink-900);
}

.page-about .honor__panel {
  padding: 26px 20px;
  background: linear-gradient(140deg, rgba(22, 50, 74, 0.9), rgba(13, 27, 46, 0.94));
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-lg);
}

.page-about .honor__list {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .honor__item {
  padding-left: 12px;
  border-left: 1px solid var(--line-cyan);
}

.page-about .honor__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .honor__v {
  display: block;
  margin-top: 3px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .honor__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 640px) {
  .page-about .city-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .pace-row {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 4px 24px;
    align-items: baseline;
    padding: 20px 0;
  }

  .page-about .honor__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: end;
  }

  .page-about .about-hero {
    padding: 34px 0 64px;
  }

  .page-about .crew__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .honor__panel {
    padding: 34px 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline__layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-rail .page-toc__list {
    display: block;
    overflow: visible;
    margin-top: 12px;
    padding-bottom: 0;
  }

  .page-about .rail-link {
    padding: 9px 12px;
    margin-bottom: 2px;
  }

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

  .page-about .stage {
    padding: 26px 26px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .path-chip,
  .page-about .stage,
  .page-about .city-node,
  .page-about .author-chip,
  .page-about .rail-link {
    transition: color 0.2s linear, background 0.2s linear, border-color 0.2s linear;
  }

  .page-about .path-chip:hover,
  .page-about .path-chip:focus-visible,
  .page-about .stage:hover,
  .page-about .stage:focus-within {
    transform: none;
  }
}
<<<END>>>