.page-about {
  --about-rail: 56px;
  --about-node: rgba(232, 199, 123, 0.32);
  --about-panel: rgba(23, 32, 63, 0.72);
  position: relative;
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 4.6vw, 52px) 0 clamp(34px, 6vw, 76px);
  border-bottom: var(--edge);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: min(640px, 86vw);
  height: 176%;
  transform: rotate(-12deg);
  background: linear-gradient(148deg, rgba(47, 191, 143, 0.18), rgba(232, 199, 123, 0.12) 46%, rgba(14, 22, 48, 0) 74%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: 4%;
  width: min(260px, 46vw);
  height: 86px;
  transform: rotate(-12deg);
  background: linear-gradient(110deg, rgba(192, 57, 43, 0.22), rgba(14, 22, 48, 0));
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  align-items: center;
}

.page-about .about-hero__media {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
}

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

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--champagne);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 50px);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--ivory);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  margin: 0 0 26px;
  color: var(--muted);
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 通用区块节奏 ---------- */
.page-about .about-doing,
.page-about .about-stages,
.page-about .about-team,
.page-about .about-pledge,
.page-about .about-partner,
.page-about .about-record {
  padding: clamp(42px, 8vw, 88px) 0;
}

.page-about .about-stages,
.page-about .about-partner {
  background: linear-gradient(180deg, rgba(23, 32, 63, 0.55), rgba(23, 32, 63, 0));
}

.page-about .about-doing__body {
  max-width: 74ch;
  color: var(--ivory);
}

.page-about .about-doing__body p {
  margin: 0 0 16px;
  line-height: 1.85;
}

.page-about .about-inline-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--emerald);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 191, 143, 0.4);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--champagne);
  border-color: rgba(232, 199, 123, 0.6);
}

/* ---------- 运营历程 ---------- */
.page-about .stage-board {
  display: grid;
  gap: 26px;
  margin-top: 8px;
}

.page-about .stage-scale__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: stage;
  display: grid;
  gap: 2px;
}

.page-about .stage-scale__list li {
  position: relative;
  counter-increment: stage;
  padding-left: 34px;
  padding-bottom: 22px;
}

.page-about .stage-scale__list li::before {
  content: counter(stage, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--champagne);
}

.page-about .stage-scale__list li::after {
  content: "";
  position: absolute;
  left: 10px;
  top: 24px;
  bottom: -2px;
  width: 1px;
  background: linear-gradient(180deg, var(--about-node), rgba(232, 199, 123, 0));
}

.page-about .stage-scale__list li:last-child {
  padding-bottom: 0;
}

.page-about .stage-scale__list li:last-child::after {
  display: none;
}

.page-about .stage-scale__list a {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
  color: var(--ivory);
  transition: color 0.25s var(--ease);
}

.page-about .stage-scale__name {
  font-size: 15px;
  line-height: 1.4;
}

.page-about .stage-scale__range {
  font-size: 12px;
  color: var(--muted);
}

.page-about .stage-scale__list a:hover .stage-scale__name,
.page-about .stage-scale__list a:focus-visible .stage-scale__name {
  color: var(--emerald);
}

.page-about .stage-cards {
  display: grid;
  gap: 18px;
}

.page-about .stage-card {
  position: relative;
  padding: 22px 24px 24px;
  background: var(--ink-800);
  border: var(--edge);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 0);
  scroll-margin-top: 96px;
}

.page-about .stage-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, var(--emerald), rgba(47, 191, 143, 0));
}

.page-about .stage-card__range {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .stage-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.35;
  color: var(--ivory);
}

.page-about .stage-card__text {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 15px;
}

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

.page-about .stage-card__points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ivory);
}

.page-about .stage-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--moss);
  transform: rotate(45deg);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 16px 18px;
  background: var(--about-panel);
  border-left: 2px solid var(--emerald);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 0);
}

.page-about .team-item--note {
  border-left-color: var(--champagne);
}

.page-about .team-item__count {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--champagne);
  padding-top: 3px;
}

.page-about .team-item__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--ivory);
}

.page-about .team-item__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-team__media {
  width: 100%;
}

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

.page-about .about-team__media .media-frame__caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  padding-top: 10px;
}

/* ---------- 服务承诺 ---------- */
.page-about .pledge-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pledge;
  display: grid;
  gap: 16px;
}

.page-about .pledge {
  position: relative;
  counter-increment: pledge;
  padding: 18px 20px 18px 68px;
  background: var(--ink-800);
  border: var(--edge);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 0);
}

.page-about .pledge::before {
  content: counter(pledge);
  position: absolute;
  left: 20px;
  top: 18px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-900);
  background: linear-gradient(140deg, var(--champagne), var(--emerald));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 0);
}

.page-about .pledge h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ivory);
}

.page-about .pledge p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 合作共建 ---------- */
.page-about .about-partner__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-partner__text {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 15px;
}

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

.page-about .panel {
  background: var(--ink-800);
  border: var(--edge);
  transition: border-color 0.3s var(--ease);
}

.page-about .panel[open] {
  border-color: rgba(47, 191, 143, 0.55);
}

.page-about .panel .panel__title {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ivory);
  font-size: 15px;
}

.page-about .panel .panel__title::-webkit-details-marker {
  display: none;
}

.page-about .panel .panel__index {
  font-size: 12px;
  color: var(--champagne);
  letter-spacing: 0.06em;
}

.page-about .panel .panel__label {
  flex: 1;
}

.page-about .panel .panel__mark {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-about .panel .panel__mark::before,
.page-about .panel .panel__mark::after {
  content: "";
  position: absolute;
  background: var(--emerald);
  transition: transform 0.3s var(--ease);
}

.page-about .panel .panel__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-about .panel .panel__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-about .panel[open] .panel__mark::after {
  transform: scaleY(0);
}

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

.page-about .panel .panel__content p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 主体与备案 ---------- */
.page-about .about-record__media {
  width: 100%;
  margin-bottom: clamp(22px, 3.4vw, 34px);
}

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

.page-about .about-record__body {
  max-width: 76ch;
}

.page-about .about-record__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  color: var(--ivory);
}

.page-about .about-record__text {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.85;
  font-size: 15px;
}

.page-about .record-list {
  margin: 0;
  border-top: var(--edge);
}

.page-about .record-list__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-bottom: var(--edge);
}

.page-about .record-list__row dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--clay);
  text-transform: uppercase;
}

.page-about .record-list__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--ivory);
}

.page-about .record-list__row dd a {
  color: var(--emerald);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 191, 143, 0.4);
}

.page-about .record-list__row dd a:hover,
.page-about .record-list__row dd a:focus-visible {
  color: var(--champagne);
  border-color: rgba(232, 199, 123, 0.6);
}

/* ---------- 数字收束 ---------- */
.page-about .about-figures {
  padding: 0 0 clamp(40px, 7vw, 76px);
}

.page-about .figure-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .figure {
  padding: 22px 22px 24px;
  background: linear-gradient(160deg, rgba(42, 47, 62, 0.95), rgba(23, 32, 63, 0.95));
  border: var(--edge);
  clip-path: var(--cut-poly);
  display: grid;
  gap: 6px;
}

.page-about .figure__num {
  font-size: clamp(38px, 8vw, 56px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--champagne);
}

.page-about .figure__label {
  font-size: 15px;
  color: var(--ivory);
}

.page-about .figure__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 斜线收尾 ---------- */
.page-about .about-ribbon {
  height: 14px;
  background: repeating-linear-gradient(-12deg, var(--moss) 0 22px, var(--clay) 22px 44px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .pledge-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .record-list__row {
    grid-template-columns: 160px 1fr;
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(240px, 340px) 1fr;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-hero__media {
    max-width: none;
    margin: 0;
  }

  .page-about .stage-board {
    grid-template-columns: minmax(180px, 220px) 1fr;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .stage-scale {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .stage-cards {
    gap: 20px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr minmax(280px, 400px);
  }

  .page-about .about-partner__grid {
    grid-template-columns: 1fr minmax(300px, 440px);
  }

  .page-about .about-record__media img {
    max-height: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-inline-link,
  .page-about .panel,
  .page-about .panel .panel__mark::before,
  .page-about .panel .panel__mark::after {
    transition: none;
  }
}