.page-about {
  background: var(--ink-deep);
  color: var(--warm-white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about figure {
  margin: 0;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(circle at 86% 10%, rgba(216, 169, 75, 0.16), transparent 56%),
    radial-gradient(circle at 4% 94%, rgba(63, 160, 138, 0.1), transparent 52%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
}

.page-about .about-hero__copy {
  display: grid;
  align-content: start;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
}

.page-about .h1-mark {
  color: var(--gold-bright);
  display: inline;
}

.page-about .hero-lead {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.82);
}

.page-about .hero-lead--sub {
  font-size: var(--fs-14);
  color: var(--slate-blue);
  border-left: 2px solid var(--cinnabar);
  padding-left: 14px;
  line-height: 1.8;
}

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

.page-about .hero-card {
  position: relative;
  background: var(--ink-step);
  border: var(--border-gold);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .hero-card__title {
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--gold-bright);
}

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

.page-about .hero-card__list li {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(216, 169, 75, 0.28);
}

.page-about .hero-card__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .hero-card__k {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .hero-card__v {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--warm-white);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(38px, 6vw, 78px) 0;
  border-top: 1px solid rgba(216, 169, 75, 0.22);
}

.page-about .about-section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  line-height: 1.22;
}

.page-about .about-lede {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.78);
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .origin-figure {
  border: 2px solid rgba(216, 169, 75, 0.55);
  box-shadow: var(--shadow-hard);
  background: var(--ink-night);
}

.page-about .origin-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .origin-figure .media-caption {
  display: block;
  padding: 10px 12px;
  font-size: var(--fs-12);
  color: var(--slate-blue);
  border-top: 1px solid rgba(216, 169, 75, 0.24);
}

.page-about .origin-body p {
  margin: 0 0 14px;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.8);
  max-width: 36em;
}

.page-about .origin-facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .origin-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(246, 241, 230, 0.74);
  border-left: 2px solid var(--jade);
  padding-left: 12px;
}

.page-about .origin-facts__num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--gold-bright);
  letter-spacing: 0.04em;
}

/* ---------- 制作流程 ---------- */
.page-about .craft-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .craft-flow li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px dashed rgba(216, 169, 75, 0.26);
}

.page-about .craft-flow li:first-child {
  border-top: 1px dashed rgba(216, 169, 75, 0.26);
}

.page-about .craft-flow__num {
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--gold);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.page-about .craft-flow h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--warm-white);
}

.page-about .craft-flow p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.76);
  max-width: 42em;
}

.page-about .craft-note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-black);
  background: var(--cream);
  border-left: 6px solid var(--gold);
  max-width: 46em;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.page-about .team-stat {
  border-bottom: 2px solid var(--gold);
  padding-bottom: 10px;
}

.page-about .team-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 5vw, 2.9rem);
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: 0.01em;
}

.page-about .team-stat__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-blue);
}

.page-about .team-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 14px;
}

.page-about .team-tab {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: 1;
  padding: 10px 16px;
  color: var(--warm-white);
  background: var(--ink-step);
  border: 1px solid rgba(216, 169, 75, 0.42);
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-tab:hover {
  border-color: var(--gold-bright);
}

.page-about .team-tab[aria-selected="true"] {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--warm-white);
  font-weight: 700;
}

.page-about .team-tab:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 2px;
}

.page-about .team-panel {
  background: var(--ink-step);
  border: 1px solid rgba(216, 169, 75, 0.32);
  padding: clamp(16px, 3vw, 22px);
}

.page-about .team-panel:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 2px;
}

.page-about .team-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-panel__list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: rgba(246, 241, 230, 0.82);
}

.page-about .team-panel__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.64em;
  width: 6px;
  height: 6px;
  background: var(--jade);
}

.page-about .team-figure {
  border: 2px solid rgba(216, 169, 75, 0.45);
  box-shadow: var(--shadow-hard);
  background: var(--ink-night);
}

.page-about .team-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .team-figure .media-caption {
  display: block;
  padding: 10px 12px;
  font-size: var(--fs-12);
  color: var(--slate-blue);
  border-top: 1px solid rgba(216, 169, 75, 0.24);
}

/* ---------- 改版时间轴 ---------- */
.page-about .timeline-figure {
  border: 2px solid rgba(216, 169, 75, 0.5);
  box-shadow: var(--shadow-hard);
  background: var(--ink-night);
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .timeline-figure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .timeline-figure .media-caption {
  display: block;
  padding: 10px 12px;
  font-size: var(--fs-12);
  color: var(--slate-blue);
  border-top: 1px solid rgba(216, 169, 75, 0.24);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(20px, 3vw, 28px) 0;
  border-top: 1px dashed rgba(216, 169, 75, 0.26);
}

.page-about .timeline__mark {
  border-left: 2px solid rgba(216, 169, 75, 0.5);
  padding-left: 14px;
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 5.6vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .timeline__year--now {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  letter-spacing: 0.06em;
  color: var(--gold-bright);
  padding-top: 8px;
}

.page-about .timeline__ver {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-blue);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  line-height: 1.4;
  color: var(--warm-white);
}

.page-about .timeline__body p {
  margin: 0 0 12px;
  max-width: 38em;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.78);
}

/* ---------- 折叠说明 ---------- */
.page-about .fold {
  border-left: 2px solid rgba(216, 169, 75, 0.38);
  padding-left: 14px;
}

.page-about .fold__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--gold-bright);
}

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

.page-about .fold__summary::before {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--cinnabar);
  font-size: var(--fs-14);
}

.page-about .fold[open] .fold__summary::before {
  content: "－";
}

.page-about .fold__summary:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
}

.page-about .fold__body {
  margin: 10px 0 0;
  padding: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.78);
}

.page-about ul.fold__body {
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-about ul.fold__body li {
  position: relative;
  padding-left: 16px;
}

.page-about ul.fold__body li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: var(--gold);
  font-weight: 700;
}

.page-about div.fold__body p {
  margin: 0;
  max-width: 34em;
}

/* ---------- 首屏取舍清单 ---------- */
.page-about .shift-list {
  margin: 0;
  padding: 0;
}

.page-about .shift-list > div {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(216, 169, 75, 0.2);
}

.page-about .shift-list > div:first-child {
  border-top: 1px solid rgba(216, 169, 75, 0.2);
}

.page-about .shift-list dt {
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--gold-bright);
}

.page-about .shift-list dd {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.78);
  max-width: 44em;
}

/* ---------- 印章区 ---------- */
.page-about .seal-row {
  list-style: none;
  margin: 0;
  padding: 6px 4px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2.5vw, 22px);
}

.page-about .seal-card {
  flex: 1 1 150px;
  min-width: 140px;
  background: var(--cream);
  color: var(--ink-black);
  border: 2px solid var(--gold);
  box-shadow: 4px 4px 0 var(--ink-night);
  padding: 16px 14px;
  transform: rotate(-2deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .seal-card:nth-child(even) {
  transform: rotate(1.5deg);
}

.page-about .seal-card:hover {
  transform: rotate(0deg) translateY(-3px);
}

.page-about .seal-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  line-height: 1.1;
  color: var(--cinnabar);
  letter-spacing: 0.01em;
}

.page-about .seal-card__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--ink-black);
}

.page-about .seal-card--award {
  background: var(--ink-step);
  color: var(--warm-white);
  border-color: var(--gold-bright);
}

.page-about .seal-card--award .seal-card__num {
  color: var(--gold-bright);
}

.page-about .seal-card--award .seal-card__label {
  color: rgba(246, 241, 230, 0.86);
}

.page-about .seal-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-blue);
}

/* ---------- 合作 ---------- */
.page-about .collab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .collab-copy h2 {
  margin: 6px 0 14px;
}

.page-about .collab-copy p {
  margin: 0;
  max-width: 32em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.8);
}

.page-about .collab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

.page-about .fold--lg {
  background: var(--ink-step);
  border-left: 0;
  border: 1px solid rgba(216, 169, 75, 0.34);
  padding: 16px 18px;
}

.page-about .fold--lg[open] {
  border-color: rgba(216, 169, 75, 0.7);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .shift-list > div {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 0 28px;
    align-items: baseline;
  }

  .page-about .timeline__item {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 0 32px;
  }

  .page-about .timeline__mark {
    padding-left: 18px;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .collab-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }
}

@media (min-width: 1080px) {
  .page-about .timeline__item {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 0 44px;
  }

  .page-about .craft-flow li {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .seal-card,
  .page-about .team-tab {
    transition: none;
  }

  .page-about .seal-card:hover {
    transform: rotate(-2deg);
  }

  .page-about .seal-card:nth-child(even):hover {
    transform: rotate(1.5deg);
  }
}