.page-about {
  --about-glow: rgba(22, 224, 192, 0.16);
  --about-glow-strong: rgba(22, 224, 192, 0.34);
  --about-node-size: 40px;
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .crumbs__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  font-size: 0.8rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.page-about .crumbs__link {
  color: var(--neon-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .crumbs__link:hover,
.page-about .crumbs__link:focus-visible {
  border-bottom-color: var(--neon);
}

.page-about .crumbs__sep {
  color: var(--line);
}

/* 首屏 */
.page-about .about-hero {
  padding-top: clamp(1.25rem, 4vw, 2.5rem);
  padding-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3.25rem);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -0.02em;
  font-size: clamp(2rem, 7vw, 3.75rem);
  line-height: 1.06;
  color: var(--paper);
  margin: 0.7rem 0 0;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.8;
  color: var(--muted);
  max-width: 46ch;
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 2.25rem;
  margin: 1.8rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-about .about-hero__facts strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-hero__facts span {
  font-size: 0.82rem;
  color: var(--muted);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .about-hero__figure .figure__cap {
  padding: 0.8rem 1rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* 章节跳转条 */
.page-about .about-jump {
  position: sticky;
  top: var(--bar-h);
  z-index: 4;
  background: var(--glass);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-jump__inner {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
  scrollbar-width: none;
}

.page-about .about-jump__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  padding-right: 0.6rem;
  border-right: 1px solid var(--line);
}

.page-about .about-jump__link {
  flex: 0 0 auto;
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  background: rgba(22, 224, 192, 0.08);
}

/* 第一阶段说明 */
.page-about .about-stage {
  padding: clamp(2.25rem, 5vw, 3.5rem) 0 0;
}

.page-about .about-stage__inner {
  display: grid;
  gap: 1rem;
  border-left: 3px solid var(--neon);
  padding-left: clamp(1rem, 3vw, 1.75rem);
}

.page-about .about-stage__mark {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
  margin: 0;
}

.page-about .about-stage__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
  color: var(--paper);
  margin: 0 0 0.6rem;
}

.page-about .about-stage__body p {
  margin: 0 0 0.9rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 64ch;
}

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

/* 时间线 */
.page-about .about-timeline-section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--about-node-size) / 2 - 1px);
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--line) 60%, transparent 100%);
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 2.25rem calc(var(--about-node-size) + 1.5rem);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--about-node-size);
  height: var(--about-node-size);
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--neon);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 0 0 6px var(--about-glow);
  transition: box-shadow 0.3s ease;
}

.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__item:focus-within .about-timeline__node {
  box-shadow: 0 0 0 10px var(--about-glow), 0 0 22px var(--about-glow-strong);
}

.page-about .about-timeline__body {
  padding-top: 0.35rem;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.3;
  color: var(--paper);
  margin: 0.65rem 0 0.55rem;
}

.page-about .about-timeline__body > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  max-width: 62ch;
}

.page-about .about-timeline__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin: 0;
  color: var(--neon-soft) !important;
  font-size: 0.9rem;
  line-height: 1.75;
  border-left: 2px solid var(--line);
  padding-left: 0;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin 0.35s ease, padding 0.35s ease;
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  max-height: 12rem;
  opacity: 1;
  margin-top: 0.85rem;
  padding-left: 0.9rem;
}

/* 球队档案 */
.page-about .about-ark-section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 0;
}

.page-about .about-ark {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: 2rem;
  align-items: start;
}

.page-about .about-ark__figure {
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel-2) 0%, var(--ink) 100%);
  border: 1px solid var(--line);
  padding: clamp(0.75rem, 2vw, 1.25rem);
}

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

.page-about .about-ark__hint {
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-about .about-field {
  margin-bottom: 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-field:hover {
  border-color: var(--neon-soft);
}

.page-about .about-field[open] {
  border-color: var(--neon);
  background: var(--panel-2);
}

.page-about .about-field__sum {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.8rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-field__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--neon);
  line-height: 1;
}

.page-about .about-field[open] .about-field__sum::after {
  content: "–";
}

.page-about .about-field__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.page-about .about-field__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-field__note {
  margin: 0;
  padding: 0 1rem 0.95rem 2.5rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team-section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 0;
}

.page-about .about-team__figure {
  margin: 2rem 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .about-team__figure .figure__cap {
  padding: 0.8rem 1rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-about .about-team__card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.2rem 1.15rem 1.3rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-team__card:hover {
  border-color: var(--neon);
  transform: translateY(-3px);
}

.page-about .about-team__shift {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--amber);
  background: rgba(255, 194, 75, 0.1);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

.page-about .about-team__card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--paper);
  margin: 0.75rem 0 0.55rem;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team__rhythm {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--flame);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--neon-soft);
  max-width: 68ch;
}

/* 内容伙伴 */
.page-about .about-partners-section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 0;
}

.page-about .about-partners__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
}

.page-about .about-partners__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .about-partners__figure .figure__cap {
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .about-partners__body .section__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.25;
  color: var(--paper);
  margin: 0.65rem 0 0.85rem;
}

.page-about .about-partners__body > p {
  margin: 0 0 1.25rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 60ch;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-partners__list li {
  display: grid;
  gap: 0.2rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--line);
}

.page-about .about-partners__list strong {
  font-size: 0.92rem;
  color: var(--paper);
}

.page-about .about-partners__list span {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--muted);
}

/* 往后安排 */
.page-about .about-next-section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 0;
}

.page-about .about-next__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-about .about-next__item {
  position: relative;
  padding: 1.15rem 1.15rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--panel-2) 0%, var(--panel) 100%);
}

.page-about .about-next__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--neon);
  opacity: 0.7;
  line-height: 1;
  margin-bottom: 0.6rem;
}

.page-about .about-next__item h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--paper);
  margin: 0 0 0.5rem;
}

.page-about .about-next__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 结尾行动 */
.page-about .about-cta {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-about .about-cta__panel {
  display: grid;
  gap: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--panel-2) 0%, var(--ink) 70%);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--flame) 0%, var(--neon) 100%);
}

.page-about .about-cta__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.2;
  color: var(--paper);
  margin: 0 0 0.7rem;
}

.page-about .about-cta__text p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  max-width: 56ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-self: end;
}

/* 宽屏 */
@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-ark {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

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

/* 窄屏与无障碍 */
@media (max-width: 760px) {
  .page-about .about-timeline__more {
    max-height: none;
    opacity: 1;
    margin-top: 0.8rem;
    padding-left: 0.9rem;
  }

  .page-about .about-jump {
    position: static;
  }

  .page-about .about-hero__facts {
    gap: 0.75rem 1.5rem;
  }

  .page-about .about-hero__facts strong {
    font-size: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node,
  .page-about .about-timeline__more,
  .page-about .about-field,
  .page-about .about-team__card {
    transition: none;
  }

  .page-about .about-team__card:hover {
    transform: none;
  }
}