.page-about {
  --about-cut: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  --about-gap: 20px;
}

/* ---------- 面包屑当前项 ---------- */
.page-about .breadcrumbs__here {
  color: var(--gold-500);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 24px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 6.2vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 12px 0 18px;
  max-width: 18em;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 5px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--red-600) 0 55%, var(--gold-500) 55% 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.page-about .about-hero__lede {
  font-size: 17px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 40em;
  margin: 0 0 24px;
}

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

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  clip-path: var(--about-cut);
  overflow: hidden;
}

.page-about .about-hero__facts .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 16px;
  background: var(--ink-800);
}

.page-about .about-hero__facts .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 700;
  color: var(--gold-500);
  letter-spacing: 0.02em;
  line-height: 1;
}

.page-about .about-hero__facts .stat__label {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-hero__stripe {
  margin-top: 32px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__hero {
  margin: 32px 0 40px;
}

.page-about .about-timeline__hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .timeline {
  display: grid;
  gap: 0;
}

.page-about .timeline__index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 12px;
  margin-bottom: 20px;
  scrollbar-width: thin;
}

.page-about .timeline__year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  padding: 8px 14px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .timeline__year:hover,
.page-about .timeline__year:focus-visible {
  color: var(--gold-500);
  border-color: var(--gold-500);
  background: var(--ink-700);
}

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

.page-about .timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold-500) 0%, var(--red-600) 50%, var(--teal-600) 100%);
  opacity: 0.65;
}

.page-about .timeline__item {
  position: relative;
  padding-left: 34px;
  padding-bottom: 24px;
}

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

.page-about .timeline__node {
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 16px;
  background: var(--gold-500);
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
  box-shadow: 0 0 0 4px rgba(242, 178, 51, 0.14);
}

.page-about .timeline__panel {
  padding: 20px 18px;
}

.page-about .timeline__panel .panel__title {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
  margin: 4px 0 10px;
  line-height: 1.45;
}

.page-about .timeline__panel .panel__body {
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  margin: 0;
}

.page-about .timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- 段位 ---------- */
.page-about .about-ranks__grid {
  align-items: start;
}

.page-about .about-ranks__prose {
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-ranks__prose strong {
  color: var(--gold-500);
}

.page-about .rank-ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .rank-ladder__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .rank-ladder__item:hover {
  border-color: var(--gold-500);
  background: var(--ink-700);
}

.page-about .rank-ladder__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--gold-500);
  letter-spacing: 0.06em;
}

.page-about .rank-ladder__name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .rank-ladder__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
  padding-left: 12px;
  border-left: 3px solid var(--teal-600);
}

/* ---------- 房间演进 ---------- */
.page-about .room-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .room-track__step {
  position: relative;
  padding: 22px 20px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-left: 4px solid var(--gold-500);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.page-about .room-track__step--teal {
  border-left-color: var(--teal-600);
}

.page-about .room-track__step--red {
  border-left-color: var(--red-600);
}

.page-about .room-track__phase {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
  padding: 3px 10px;
  border: 1px solid var(--ink-700);
  margin-bottom: 12px;
}

.page-about .room-track__title {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about .room-track__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 14px;
}

.page-about .room-track__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .room-track__list li {
  font-size: 13px;
  color: var(--paper);
  padding: 4px 12px;
  background: rgba(23, 163, 152, 0.14);
  border: 1px solid rgba(23, 163, 152, 0.4);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-about .about-rooms__foot {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-rooms__foot a {
  color: var(--teal-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 211, 199, 0.5);
}

.page-about .about-rooms__foot a:hover,
.page-about .about-rooms__foot a:focus-visible {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  align-items: start;
}

.page-about .team-compose {
  display: grid;
  gap: 18px;
  margin-bottom: 26px;
}

.page-about .team-compose__row {
  outline: none;
}

.page-about .team-compose__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .team-compose__label {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .team-compose__value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold-500);
}

.page-about .team-compose__track {
  position: relative;
  height: 14px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  overflow: hidden;
}

.page-about .team-compose__fill {
  display: block;
  height: 100%;
}

.page-about .team-compose__fill--teal {
  background: linear-gradient(90deg, var(--teal-600), var(--teal-300));
}

.page-about .team-compose__fill--red {
  background: linear-gradient(90deg, var(--red-700), var(--red-600));
}

.page-about .team-compose__fill--gold {
  background: linear-gradient(90deg, var(--gold-500), var(--gold-100));
}

.page-about .team-compose__duty {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.78;
  transition: opacity 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .team-compose__row:hover .team-compose__duty,
.page-about .team-compose__row:focus-within .team-compose__duty {
  opacity: 1;
  color: var(--teal-300);
}

.page-about .team-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  clip-path: var(--about-cut);
  overflow: hidden;
}

.page-about .team-figures__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 12px;
  background: var(--ink-800);
}

.page-about .team-figures__item .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3.6vw, 24px);
  font-weight: 700;
  color: var(--gold-500);
  line-height: 1;
}

.page-about .team-figures__item .stat__label {
  font-size: 12px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-team__media {
  margin: 0 0 20px;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-team__map {
  padding: 18px 16px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-top: 3px solid var(--teal-600);
  clip-path: var(--about-cut);
}

.page-about .about-team__map-title {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-team__map-num {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-team__map-blocks {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 4px;
  margin-bottom: 12px;
}

.page-about .about-team__map-blocks span {
  height: 14px;
  background: rgba(23, 163, 152, 0.28);
  border: 1px solid rgba(23, 163, 152, 0.55);
  clip-path: polygon(3px 0, 100% 0, 100% calc(100% - 3px), calc(100% - 3px) 100%, 0 100%, 0 3px);
}

.page-about .about-team__map-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 文化主线 ---------- */
.page-about .about-culture__grid {
  align-items: start;
}

.page-about .about-culture__media {
  margin: 0;
}

.page-about .about-culture__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-culture__prose {
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
  margin-bottom: 22px;
}

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

.page-about .culture-palette__chip {
  position: relative;
  padding: 16px 16px 16px 20px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  overflow: hidden;
}

.page-about .culture-palette__swatch {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
}

.page-about .culture-palette__swatch--flag {
  background: linear-gradient(180deg, var(--red-600) 0 20%, var(--teal-600) 20% 40%, var(--gold-500) 40% 60%, var(--paper) 60% 80%, var(--ink-900) 80% 100%);
}

.page-about .culture-palette__swatch--knot {
  background: linear-gradient(180deg, var(--gold-500), var(--gold-100));
}

.page-about .culture-palette__swatch--mandala {
  background: linear-gradient(180deg, var(--teal-600), var(--red-600));
}

.page-about .culture-palette__name {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .culture-palette__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners__card {
  position: relative;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-partners__card .panel__title {
  margin: 0;
}

.page-about .about-partners__card .panel__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--gold-500);
  line-height: 1;
}

.page-about .about-partners__card--gold {
  border-top: 3px solid var(--gold-500);
}

/* ---------- 未来计划 ---------- */
.page-about .about-next__panel {
  padding: 28px 22px;
}

.page-about .about-next__head {
  margin-bottom: 22px;
}

.page-about .about-next__head .section__title {
  margin: 6px 0 0;
  color: var(--paper);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-next__list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
}

.page-about .about-next__num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-900);
  background: var(--gold-500);
  text-align: center;
  padding: 3px 0;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-about .about-next__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-900);
}

.page-about .about-next__list strong {
  color: var(--ink-900);
  font-weight: 800;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__actions .btn {
  border: 1px solid var(--ink-900);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .rank-ladder {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-next__panel {
    padding: 36px 32px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-hero__facts .stat {
    padding: 24px 20px;
  }

  .page-about .timeline {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 0 40px;
  }

  .page-about .timeline__index {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
    overflow: visible;
    margin-bottom: 0;
    padding: 0 18px 0 0;
    border-right: 1px solid var(--ink-700);
  }

  .page-about .timeline__year {
    display: block;
    background: none;
    border: none;
    border-right: 3px solid transparent;
    clip-path: none;
    padding: 8px 0;
    text-align: right;
    font-size: 15px;
  }

  .page-about .timeline__year:hover,
  .page-about .timeline__year:focus-visible {
    background: none;
    border-right-color: var(--gold-500);
    border-radius: 0;
  }

  .page-about .timeline__list::before {
    left: 8px;
  }

  .page-about .timeline__item {
    padding-left: 44px;
    padding-bottom: 30px;
  }

  .page-about .timeline__panel {
    padding: 24px 26px;
    max-width: 88%;
  }

  .page-about .timeline__item:nth-child(even) .timeline__panel {
    margin-left: auto;
  }

  .page-about .about-team__media img {
    aspect-ratio: 3 / 2.4;
  }

  .page-about .about-culture__media img {
    aspect-ratio: 1 / 1.1;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1120px) {
  .page-about .timeline {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 0 56px;
  }

  .page-about .about-hero__facts .stat__num {
    font-size: 32px;
  }
}

/* ---------- 动效尊重 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .team-compose__duty,
  .page-about .team-compose__fill,
  .page-about .timeline__year,
  .page-about .rank-ladder__item {
    transition: none;
  }
}