.page-about {
  --about-rule: rgba(200, 255, 61, .28);
  --about-panel: rgba(244, 241, 230, .06);
  background: var(--ink);
  color: var(--fg);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .story-hero {
  position: relative;
  padding: clamp(28px, 5vw, 52px) 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(120% 82% at 8% 0%, rgba(200, 255, 61, .10), transparent 58%),
    linear-gradient(180deg, var(--ink-3) 0%, var(--ink) 72%);
  border-bottom: 1px solid var(--line);
}

.page-about .story-hero .crumbs,
.page-about .story-hero .crumbs a {
  color: var(--fg-muted);
}

.page-about .story-hero .crumbs a:hover,
.page-about .story-hero .crumbs a:focus-visible {
  color: var(--lime);
}

.page-about .story-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .story-hero__lead h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  color: var(--paper);
}

.page-about .story-hero__intro {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--fg);
}

.page-about .story-hero__intro.serif {
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.78;
  color: var(--lime-soft);
  margin-top: 22px;
}

.page-about .story-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .story-hero__facts {
  align-self: end;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass-soft);
  backdrop-filter: blur(6px);
}

.page-about .fact-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 20px;
  border-top: 1px solid var(--line);
}

.page-about .fact-row:first-child {
  border-top: 0;
}

.page-about .fact-row__val {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .fact-row__key {
  font-size: 13px;
  line-height: 1.5;
  text-align: right;
  color: var(--fg-muted);
}

/* ---------- 全宽首图 ---------- */
.page-about .story-plate {
  position: relative;
  margin: 0;
  background: var(--ink-3);
  border-bottom: 1px solid var(--line);
}

.page-about .story-plate img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 58vh;
  object-fit: cover;
  filter: saturate(.7) contrast(1.06) brightness(.84);
}

.page-about .story-plate figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px var(--gutter) 14px;
  background: linear-gradient(180deg, transparent, rgba(9, 29, 24, .94));
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--lime-soft);
}

/* ---------- 章节导航 ---------- */
.page-about .chapter-nav {
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.page-about .chapter-nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .chapter-nav__list > li {
  flex: 0 0 auto;
}

.page-about .chapter-nav__link {
  display: block;
  padding: 15px 18px;
  font-size: 13px;
  letter-spacing: .05em;
  white-space: nowrap;
  color: var(--fg-muted);
  text-decoration: none;
  border-right: 1px solid var(--line);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-about .chapter-nav__link:hover,
.page-about .chapter-nav__link:focus-visible {
  background: var(--lime);
  color: var(--ink);
}

/* ---------- 章节骨架 ---------- */
.page-about .story-block {
  padding: clamp(48px, 8vw, 92px) 0;
}

.page-about .story-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  padding-bottom: 18px;
  margin-bottom: clamp(26px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}

.page-about .surface-paper .story-block__head,
.page-about .surface-paper-2 .story-block__head {
  border-bottom-color: var(--line-ink);
}

.page-about .story-block__head h2 {
  margin: 0;
}

.page-about .story-block__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .surface-paper,
.page-about .surface-paper-2 {
  background-image: repeating-linear-gradient(
    90deg,
    rgba(22, 33, 29, .034) 0 1px,
    transparent 1px 44px
  );
}

/* ---------- 开篇章节 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .origin-note__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .origin-note__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line-ink);
}

.page-about .origin-note__list li:last-child {
  border-bottom: 0;
}

.page-about .origin-note__k {
  font-size: 13px;
  color: var(--text);
  opacity: .72;
}

.page-about .origin-note__v {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--brick);
}

/* ---------- 团队章节 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .team-lead {
  margin: 0 0 20px;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.8;
  color: var(--lime-soft);
}

.page-about .team-copy p {
  font-size: 16px;
  line-height: 1.82;
  color: var(--fg);
}

.page-about .duty-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .duty-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 16px;
  background: var(--ink-2);
}

.page-about .duty-item__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-about .duty-item__text {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg);
}

.page-about .team-media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-media img {
  filter: saturate(.66) contrast(1.05) brightness(.86);
}

.page-about .team-media .media__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .story-timeline {
  overflow-x: auto;
  padding-bottom: 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .story-timeline:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-about .story-timeline__track {
  display: flex;
  width: max-content;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 4px 2px 8px;
}

.page-about .story-ticket {
  flex: 0 0 auto;
  width: min(78vw, 296px);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--lime);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(244, 241, 230, .08), rgba(244, 241, 230, .02));
  transition: transform .28s var(--ease), border-color .28s var(--ease);
}

.page-about .story-ticket:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .story-ticket__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .story-ticket__year {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
}

.page-about .story-ticket__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .story-ticket__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-muted);
}

.page-about .story-ticket__more {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-about .story-ticket__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--lime-soft);
}

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

.page-about .story-ticket__more summary::before {
  content: "＋";
  font-family: var(--font-mono);
  margin-right: 6px;
  color: var(--lime);
}

.page-about .story-ticket__more[open] summary::before {
  content: "－";
}

.page-about .story-ticket__more p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .story-texture {
  margin: clamp(30px, 5vw, 48px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .story-texture img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.58) contrast(1.1) brightness(.72);
}

/* ---------- 三地排班 ---------- */
.page-about .shift-lead {
  max-width: 66ch;
  margin: 0 0 26px;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.78;
  color: var(--text);
  opacity: .86;
}

.page-about .shift-gauge {
  display: grid;
  grid-template-columns: 3fr 1fr 2fr;
  gap: 3px;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
}

.page-about .shift-gauge__seg {
  display: block;
}

.page-about .shift-gauge__seg--pre {
  background: rgba(12, 42, 34, .30);
}

.page-about .shift-gauge__seg--live {
  background: var(--brick);
}

.page-about .shift-gauge__seg--post {
  background: var(--ink);
}

.page-about .shift-gauge__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--text);
  opacity: .6;
}

.page-about .story-tabs {
  margin-top: 34px;
}

.page-about .story-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  border: 0;
}

.page-about .story-tabs__tab {
  appearance: none;
  font: inherit;
  font-size: 14px;
  letter-spacing: .04em;
  padding: 10px 22px;
  border: 1px solid var(--line-ink);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .story-tabs__tab:hover {
  border-color: var(--ink);
}

.page-about .story-tabs__tab:focus-visible {
  outline: 2px solid var(--brick);
  outline-offset: 2px;
}

.page-about .story-tabs__tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--lime);
}

.page-about .story-tabs__panel {
  padding: 0;
}

.page-about .shift-card {
  border: 1px solid var(--line-ink);
  border-left: 4px solid var(--lime);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 24px 22px 26px;
}

.page-about .shift-card__title {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .shift-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
  opacity: .85;
}

.page-about .shift-card__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .shift-card__list li {
  position: relative;
  padding: 9px 0 9px 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  opacity: .78;
  border-top: 1px dashed var(--line-ink);
}

.page-about .shift-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 8px;
  height: 2px;
  background: var(--brick);
}

/* ---------- 合作生态 ---------- */
.page-about .partners-grid .prose p {
  font-size: 16px;
  line-height: 1.85;
}

.page-about .partner-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 40px);
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .partner-stat {
  background: var(--ink);
  padding: 24px 20px;
}

.page-about .partner-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
}

.page-about .partner-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.62;
  color: var(--fg-muted);
}

/* ---------- 做法清单 ---------- */
.page-about .code-list {
  counter-reset: code;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .code-item {
  counter-increment: code;
  position: relative;
  padding-left: 56px;
}

.page-about .code-item::before {
  content: counter(code, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 4px 7px;
  border-radius: 2px;
  background: var(--ink);
  color: var(--lime);
}

.page-about .code-item__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .code-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
  opacity: .8;
}

/* ---------- 延伸入口 ---------- */
.page-about .story-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  padding: 1px;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
}

.page-about .story-next__link {
  display: block;
  padding: 24px 22px;
  background: var(--paper);
  color: var(--text);
  text-decoration: none;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.page-about .story-next__link:hover,
.page-about .story-next__link:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.page-about .story-next__title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .story-next__desc {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-about .story-next__link:hover .story-next__desc,
.page-about .story-next__link:focus-visible .story-next__desc {
  color: var(--lime-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .partner-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .code-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px 44px;
  }

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

@media (min-width: 900px) {
  .page-about .story-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, .9fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .74fr);
    align-items: start;
  }

  .page-about .team-media {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (min-width: 1080px) {
  .page-about .story-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-about .duty-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-about .story-ticket {
    width: 82vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .story-ticket,
  .page-about .chapter-nav__link,
  .page-about .story-next__link,
  .page-about .story-tabs__tab {
    transition: none;
  }

  .page-about .story-ticket:hover {
    transform: none;
  }
}