.page-about {
  --about-coord-w: 96px;
  --about-block-gap: clamp(32px, 6vw, 80px);
  --about-soft-line: rgba(23, 20, 18, .14);
  --about-tint: rgba(22, 32, 74, .06);
  --about-print: 4px 4px 0 rgba(22, 32, 74, .12);
  display: block;
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

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

.page-about .about-crumb {
  padding-top: clamp(14px, 3vw, 26px);
}

.page-about .about-link {
  color: var(--indigo);
  text-decoration: underline;
  text-decoration-color: var(--apricot);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-link:hover {
  color: var(--coral);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(34px, 6vw, 74px);
  background-image: repeating-linear-gradient(112deg, transparent 0 56px, rgba(22, 32, 74, .05) 56px 57px);
}

.page-about .about-hero__layout {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  min-width: 0;
}

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

.page-about .about-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(1.95rem, 6.4vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  word-break: break-word;
}

.page-about .about-hero__accent {
  color: var(--apricot);
  white-space: nowrap;
}

.page-about .about-hero__lede {
  max-width: 64ch;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-hero__side {
  min-width: 0;
  padding: clamp(16px, 3vw, 26px);
  border-radius: var(--radius-card);
  background: var(--indigo);
  color: var(--paper);
  box-shadow: var(--shadow-print);
}

.page-about .about-score {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(247, 240, 228, .2);
  border-radius: 12px;
  background: rgba(247, 240, 228, .2);
}

.page-about .about-score .scoreboard__cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--indigo);
}

.page-about .about-score .scoreboard__value {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.2vw, 1.7rem);
  font-weight: 700;
  color: var(--lime);
  letter-spacing: .01em;
}

.page-about .about-score .scoreboard__label {
  font-size: 12px;
  line-height: 1.4;
  color: rgba(247, 240, 228, .72);
}

.page-about .about-hero__log {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid rgba(247, 240, 228, .2);
  border-radius: 12px;
  background: rgba(247, 240, 228, .06);
}

.page-about .about-hero__log .log-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-about .about-hero__log-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(247, 240, 228, .6);
}

.page-about .about-hero__logs {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__logs .log-line {
  display: grid;
  grid-template-columns: 44px 44px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.55;
  color: rgba(247, 240, 228, .82);
}

.page-about .about-hero__logs .log-line__time {
  color: var(--apricot);
}

.page-about .about-hero__logs .log-line__code {
  color: var(--lime);
  letter-spacing: .08em;
}

.page-about .about-hero__logs .log-line--ok .log-line__code {
  color: var(--emerald);
}

.page-about .about-hero__media {
  margin: clamp(24px, 4vw, 44px) 0 0;
}

/* ---------- 通用图片框 ---------- */

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--radius-card);
  background: var(--label);
}

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

.page-about .about-hero__media img {
  aspect-ratio: 14 / 9;
}

.page-about .about-timeline__media img {
  aspect-ratio: 12 / 7;
}

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

.page-about .media-frame__label {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--indigo);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
}

/* ---------- 档案区块骨架 ---------- */

.page-about .about-block {
  padding-block: var(--about-block-gap);
  border-top: 1px solid var(--about-soft-line);
}

.page-about .about-block--last {
  padding-bottom: clamp(40px, 7vw, 96px);
}

.page-about .about-block__inner {
  display: grid;
  gap: clamp(14px, 2.6vw, 24px);
  min-width: 0;
}

.page-about .about-block__coord {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
}

.page-about .about-coord__num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--apricot);
  letter-spacing: .04em;
}

.page-about .about-coord__tick {
  display: block;
  width: 28px;
  height: 1px;
  background: var(--indigo);
  opacity: .4;
}

.page-about .about-coord__label {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ink-soft);
}

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

.page-about .about-block .section__head {
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-about .about-block .section__title {
  font-size: clamp(1.5rem, 3.8vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  word-break: break-word;
}

.page-about .about-block__intro {
  max-width: 62ch;
  margin: 12px 0 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.page-about .prose {
  max-width: 68ch;
}

.page-about .prose p {
  margin: 0 0 1em;
  color: var(--ink-soft);
  line-height: 1.78;
}

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

/* ---------- 受众标签 ---------- */

.page-about .about-audience {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 版本时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 6px 0 6px 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--apricot) 0%, var(--indigo) 52%, var(--lime) 100%);
  opacity: .65;
}

.page-about .about-timeline__item {
  position: relative;
  min-width: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--apricot);
  border-radius: 50%;
  background: var(--paper);
}

.page-about .about-node {
  overflow: hidden;
  border: 1px solid var(--about-soft-line);
  border-left: 4px solid var(--apricot);
  border-radius: 12px;
  background: var(--card);
}

.page-about .about-node__heading {
  margin: 0;
  font-size: inherit;
}

.page-about .about-node .accordion__trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-node__text {
  display: block;
  min-width: 0;
}

.page-about .about-node__phase {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--apricot);
  text-transform: uppercase;
}

.page-about .about-node__name {
  display: block;
  margin-top: 4px;
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-node__mark,
.page-about .about-team__mark {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  border: 1px solid var(--indigo);
  border-radius: 50%;
}

.page-about .about-node__mark::before,
.page-about .about-node__mark::after,
.page-about .about-team__mark::before,
.page-about .about-team__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--indigo);
}

.page-about .about-node__mark::before,
.page-about .about-team__mark::before {
  width: 10px;
  height: 2px;
}

.page-about .about-node__mark::after,
.page-about .about-team__mark::after {
  width: 2px;
  height: 10px;
  transition: transform .2s ease;
}

.page-about .accordion__trigger[aria-expanded="true"] .about-node__mark::after,
.page-about .accordion__trigger[aria-expanded="true"] .about-team__mark::after {
  transform: scaleY(0);
}

.page-about .about-node .accordion__panel {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--about-soft-line);
  margin: 0 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-node .accordion__panel p {
  margin: 12px 0 0;
}

.page-about .about-timeline__media {
  margin: clamp(22px, 4vw, 36px) 0 0;
}

/* ---------- 团队折叠卡 ---------- */

.page-about .about-teams {
  display: grid;
  gap: 12px;
}

.page-about .about-team {
  overflow: hidden;
  border: 1px solid var(--about-soft-line);
  border-radius: 14px;
  background: var(--card);
  box-shadow: var(--about-print);
}

.page-about .about-team__head {
  margin: 0;
  font-size: inherit;
}

.page-about .about-team .accordion__trigger {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 16px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-about .about-team__text {
  display: block;
  min-width: 0;
}

.page-about .about-team__name {
  display: block;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-team__role {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.page-about .about-team .accordion__panel {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--about-soft-line);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-team .accordion__panel p {
  margin: 12px 0 0;
}

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

.page-about .about-team__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--apricot);
}

.page-about .about-teams__media {
  margin: clamp(22px, 4vw, 36px) 0 0;
}

/* ---------- 覆盖数据 ---------- */

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

.page-about .about-coverage__item {
  padding: 18px;
  border: 1px solid var(--about-soft-line);
  border-top: 4px solid var(--indigo);
  border-radius: 14px;
  background: var(--paper-soft);
}

.page-about .about-coverage__item:nth-child(2) {
  border-top-color: var(--apricot);
}

.page-about .about-coverage__item:nth-child(3) {
  border-top-color: var(--lime);
}

.page-about .about-coverage__item:nth-child(4) {
  border-top-color: var(--emerald);
}

.page-about .about-coverage__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--indigo);
}

.page-about .about-coverage__unit {
  display: block;
  margin-top: 2px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--apricot);
}

.page-about .about-coverage__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-coverage__note {
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 行业参与 ---------- */

.page-about .about-engage {
  display: grid;
  gap: 12px;
}

.page-about .about-engage__card {
  padding: 20px;
  border-radius: 14px;
}

.page-about .about-engage__title {
  margin: 12px 0 8px;
  font-size: clamp(15px, 1.9vw, 17px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-engage__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 运营主体 ---------- */

.page-about .about-entity {
  display: grid;
  gap: 14px;
}

.page-about .about-entity__card {
  padding: 20px;
  border-radius: 14px;
}

.page-about .about-entity__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--apricot);
  text-transform: uppercase;
}

.page-about .about-entity__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-entity__code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--indigo);
  background: var(--label);
  padding: 2px 6px;
  border-radius: 4px;
  word-break: break-all;
}

.page-about .about-entity__list {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
}

.page-about .about-entity__row dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

.page-about .about-entity__row dd {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-entity__copy {
  margin-top: 14px;
}

.page-about .about-entity__banner {
  margin-top: 16px;
}

.page-about .about-entity__banner p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-coverage,
  .page-about .about-engage {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-hero__side {
    padding: clamp(20px, 3vw, 28px);
  }
}

@media (min-width: 880px) {
  .page-about .about-block__inner {
    grid-template-columns: var(--about-coord-w) minmax(0, 1fr);
    column-gap: clamp(22px, 4vw, 56px);
    row-gap: 0;
  }

  .page-about .about-block__coord {
    position: sticky;
    top: 108px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .page-about .about-coord__tick {
    width: 1px;
    height: 34px;
  }

  .page-about .about-coord__label {
    writing-mode: vertical-rl;
    letter-spacing: .32em;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
  }

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

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

  .page-about .about-team .accordion__trigger {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    padding: 18px 20px;
    column-gap: 18px;
  }

  .page-about .about-team .accordion__panel {
    padding: 0 20px 20px;
  }

  .page-about .about-node .accordion__trigger {
    padding: 16px 20px;
  }

  .page-about .about-node .accordion__panel {
    padding: 0 20px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__mark::after,
  .page-about .about-team__mark::after {
    transition: none;
  }
}