.page-about {
  --about-idx: 168px;
  background: var(--tx-ink);
  color: var(--tx-text);
  font-family: var(--tx-body);
}

/* ---------- 面包屑 ---------- */
.page-about .tx-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-family: var(--tx-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--tx-mute);
}
.page-about .tx-breadcrumb a {
  color: var(--tx-soft);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--tx-ease), border-color .2s var(--tx-ease);
}
.page-about .tx-breadcrumb a:hover,
.page-about .tx-breadcrumb a:focus-visible {
  color: var(--tx-lime);
  border-bottom-color: var(--tx-lime);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 18px 0 0;
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 34px;
}
.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
}
.page-about .about-hero__statement {
  margin-top: 22px;
  max-width: 62ch;
  display: grid;
  gap: 13px;
}
.page-about .about-hero__statement p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-hero__statement p:first-child {
  font-family: var(--tx-serif);
  font-size: 18px;
  line-height: 1.72;
  color: var(--tx-text);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--tx-line);
  overflow: hidden;
  background: var(--tx-field);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
}
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 96px;
  height: 3px;
  background: var(--tx-lime);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--tx-line);
  border-bottom: 1px solid var(--tx-line);
}
.page-about .about-figures__item {
  padding: 18px 12px 20px;
  border-right: 1px solid var(--tx-line);
  min-width: 0;
}
.page-about .about-figures__item:last-child {
  border-right: 0;
}
.page-about .about-figures dt {
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--tx-mute);
}
.page-about .about-figures dd {
  margin: 8px 0 0;
  font-family: var(--tx-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--tx-lime);
}

@media (min-width: 700px) {
  .page-about .about-figures__item {
    padding: 22px 22px 24px;
  }
  .page-about .about-figures dd {
    font-size: 30px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 56px;
    align-items: end;
    padding-bottom: 46px;
  }
}

/* ---------- 编年画布 ---------- */
.page-about .about-chronicle {
  padding: 76px 0 40px;
}
.page-about .about-chronicle__head h2 {
  margin: 12px 0 0;
  max-width: 24ch;
}
.page-about .about-chronicle__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 36px;
}

.page-about .about-years__title {
  margin: 0 0 12px;
  font-family: var(--tx-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--tx-mute);
}
.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-years__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-years__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px 14px;
  border-left: 2px solid var(--tx-line);
  text-decoration: none;
  transition: border-color .2s var(--tx-ease), background .2s var(--tx-ease);
}
.page-about .about-years__num {
  font-family: var(--tx-mono);
  font-size: 14px;
  color: var(--tx-soft);
  white-space: nowrap;
}
.page-about .about-years__tag {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--tx-mute);
}
.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  border-left-color: var(--tx-lime);
  background: var(--tx-glass);
}
.page-about .about-years__link:hover .about-years__num,
.page-about .about-years__link:focus-visible .about-years__num {
  color: var(--tx-lime);
}

.page-about .about-chronicle__stream {
  display: grid;
  gap: 0;
  min-width: 0;
}
.page-about .about-stage {
  position: relative;
  padding: 30px 20px 34px 30px;
  border-left: 1px solid var(--tx-line);
}
.page-about .about-stage:nth-child(1) { background: transparent; }
.page-about .about-stage:nth-child(2) { background: var(--tx-field); }
.page-about .about-stage:nth-child(3) { background: var(--tx-lift); }
.page-about .about-stage:nth-child(4) { background: var(--tx-field); }
.page-about .about-stage:nth-child(5) { background: var(--tx-teal); }

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 38px;
  width: 9px;
  height: 9px;
  background: var(--tx-lime);
}
.page-about .about-stage::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 42px;
  width: 16px;
  height: 1px;
  background: var(--tx-line);
}
.page-about .about-stage__year {
  display: block;
  font-family: var(--tx-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--tx-lime);
  margin-bottom: 9px;
}
.page-about .about-stage h3 {
  margin: 0;
  max-width: 26ch;
}
.page-about .about-stage > p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-stage__points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  max-width: 62ch;
}
.page-about .about-stage__points li {
  position: relative;
  padding: 9px 0 9px 18px;
  border-top: 1px solid var(--tx-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--tx-soft);
}
.page-about .about-stage__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 7px;
  height: 1px;
  background: var(--tx-mute);
}

@media (min-width: 900px) {
  .page-about .about-chronicle__grid {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-years {
    position: sticky;
    top: calc(var(--tx-bar) + 22px);
  }
  .page-about .about-years__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }
  .page-about .about-years__link {
    padding: 11px 0 11px 14px;
  }
  .page-about .about-stage {
    padding: 34px 34px 40px 34px;
  }
  .page-about .about-stage::after {
    width: 26px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 72px 0 8px;
}
.page-about .about-team .tx-h2 {
  margin: 12px 0 0;
  max-width: 20ch;
}
.page-about .about-team__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-roles {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--tx-line);
}
.page-about .about-role {
  background: var(--tx-ink);
  padding: 26px 20px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-about .about-role__num {
  font-family: var(--tx-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--tx-orange);
}
.page-about .about-role h3 {
  margin: 0;
  font-family: var(--tx-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--tx-text);
}
.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--tx-soft);
}

@media (min-width: 720px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1120px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 四道工序 ---------- */
.page-about .about-flow {
  margin-top: 68px;
  padding: 68px 0 76px;
  background: var(--tx-field);
}
.page-about .about-flow .tx-h2 {
  margin: 12px 0 0;
  max-width: 24ch;
}
.page-about .about-flow__track {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--tx-line);
}
.page-about .about-flow__step {
  position: relative;
  background: var(--tx-field);
  padding: 24px 20px 26px;
  display: flex;
  flex-direction: column;
  transition: background .25s var(--tx-ease);
}
.page-about .about-flow__step:hover {
  background: var(--tx-lift);
}
.page-about .about-flow__idx {
  font-family: var(--tx-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--tx-mute);
}
.page-about .about-flow__name {
  margin: 10px 0 0;
  font-family: var(--tx-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--tx-text);
}
.page-about .about-flow__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--tx-soft);
}
.page-about .about-flow__meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--tx-line);
  font-family: var(--tx-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--tx-orange);
}

.page-about .about-flow__figure {
  margin: 40px 0 0;
  max-width: 720px;
  border: 1px solid var(--tx-line);
  overflow: hidden;
  background: var(--tx-lift);
}
.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.68) contrast(1.06);
}

@media (min-width: 800px) {
  .page-about .about-flow__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-flow__meta {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: max-height .3s var(--tx-ease), opacity .25s var(--tx-ease),
                margin-top .3s var(--tx-ease), padding-top .3s var(--tx-ease);
  }
  .page-about .about-flow__step:hover .about-flow__meta,
  .page-about .about-flow__step:focus-within .about-flow__meta {
    max-height: 80px;
    margin-top: 16px;
    padding-top: 12px;
    border-top-color: var(--tx-line);
    opacity: 1;
  }
}

/* ---------- 合作机构 ---------- */
.page-about .about-partners {
  background: var(--tx-teal);
  padding: 72px 0 80px;
}
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.page-about .about-partners .tx-h2 {
  margin: 12px 0 0;
  max-width: 20ch;
}
.page-about .about-partners__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-partners__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--tx-mute);
}
.page-about .about-partners__note a {
  color: var(--tx-lime);
  text-decoration: none;
  border-bottom: 1px solid var(--tx-line);
}
.page-about .about-partners__note a:hover,
.page-about .about-partners__note a:focus-visible {
  border-bottom-color: var(--tx-lime);
}

.page-about .about-tags {
  list-style: none;
  margin: 30px 0 0;
  padding: 6px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-tags__item {
  position: relative;
}
.page-about .about-tags__label {
  display: inline-block;
  padding: 8px 13px;
  border: 1px solid var(--tx-line);
  background: var(--tx-glass);
  font-family: var(--tx-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--tx-text);
  transition: border-color .2s var(--tx-ease), color .2s var(--tx-ease);
}
.page-about .about-tags__item:hover .about-tags__label,
.page-about .about-tags__item:focus-within .about-tags__label {
  border-color: var(--tx-lime);
  color: var(--tx-lime);
}
.page-about .about-tags__item em {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 3;
  width: max-content;
  max-width: 240px;
  padding: 7px 11px;
  background: var(--tx-ink);
  border: 1px solid var(--tx-line);
  font-style: normal;
  font-size: 12px;
  line-height: 1.55;
  color: var(--tx-soft);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity .22s var(--tx-ease), transform .22s var(--tx-ease), visibility .22s;
}
.page-about .about-tags__item:hover em,
.page-about .about-tags__item:focus-within em {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-partners__figure {
  margin: 0;
  border: 1px solid var(--tx-line);
  overflow: hidden;
  background: var(--tx-indigo);
}
.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.8) contrast(1.04);
}

@media (max-width: 899px) {
  .page-about .about-tags {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 0;
  }
  .page-about .about-tags__item em {
    position: static;
    width: auto;
    max-width: none;
    margin-top: 6px;
    padding: 0;
    background: transparent;
    border: 0;
    font-size: 11.5px;
    color: var(--tx-mute);
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    gap: 56px;
    align-items: center;
  }
}

/* ---------- 竞技纯粹派 ---------- */
.page-about .about-creed {
  background: var(--tx-wine);
  padding: 72px 0 80px;
}
.page-about .about-creed .tx-h2 {
  margin: 12px 0 0;
  max-width: 22ch;
}
.page-about .about-creed__lead {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-creed__grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--tx-line);
}
.page-about .about-creed__item {
  background: rgba(10, 18, 17, .36);
  padding: 28px 22px 34px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-creed__num {
  font-family: var(--tx-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--tx-orange);
}
.page-about .about-creed__item h3 {
  margin: 0;
  font-family: var(--tx-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--tx-text);
}
.page-about .about-creed__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--tx-soft);
}

@media (min-width: 820px) {
  .page-about .about-creed__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 一年的内容节奏 ---------- */
.page-about .about-rhythm {
  padding: 76px 0 8px;
}
.page-about .about-rhythm .tx-h2 {
  margin: 12px 0 0;
  max-width: 22ch;
}
.page-about .about-rhythm__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-rhythm__list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
}
.page-about .about-rhythm__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 26px 0 28px;
  border-top: 1px solid var(--tx-line);
}
.page-about .about-rhythm__when {
  font-family: var(--tx-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--tx-lime);
}
.page-about .about-rhythm__body h3 {
  margin: 0;
}
.page-about .about-rhythm__body p {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--tx-soft);
}
.page-about .about-rhythm__body .about-rhythm__fit {
  padding-left: 12px;
  border-left: 2px solid var(--tx-orange);
  font-size: 13.5px;
  color: var(--tx-mute);
}

@media (min-width: 820px) {
  .page-about .about-rhythm__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 40px;
    padding: 30px 0 32px;
  }
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  padding: 56px 0 88px;
}
.page-about .about-next__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 14px;
  padding-top: 34px;
  border-top: 1px solid var(--tx-line);
}