.page-about {
  --about-cut: 56px;
  --about-rule: rgba(56, 232, 208, 0.24);
  --about-rule-soft: rgba(154, 167, 194, 0.18);
  background: var(--gx-void);
  color: var(--gx-mist);
  overflow-x: hidden;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding: 136px 0 calc(var(--about-cut) + 72px);
  background:
    radial-gradient(120% 95% at 78% -8%, rgba(42, 26, 94, 0.95) 0%, rgba(6, 11, 30, 0) 62%),
    var(--gx-void);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), 0 100%);
}

.page-about .about-cover__sky {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.36;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 76%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 76%, transparent 100%);
}

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

.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(154, 167, 194, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 167, 194, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(80% 72% at 28% 42%, #000, transparent);
  mask-image: radial-gradient(80% 72% at 28% 42%, #000, transparent);
}

.page-about .about-cover__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-about .about-cover__text {
  min-width: 0;
}

.page-about .about-cover__title {
  margin: 14px 0 0;
  max-width: 13em;
  line-height: 1.02;
}

.page-about .about-cover__lede {
  margin: 20px 0 0;
  max-width: 36em;
  color: var(--gx-mist);
}

.page-about .about-cover__card {
  padding: 20px 22px 16px;
  border: 1px solid var(--gx-rule);
  background: var(--gx-glass);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-cover__card-title {
  margin: 0;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gx-cyan);
}

.page-about .about-facts {
  margin: 10px 0 0;
  display: grid;
  gap: 2px;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
}

.page-about .about-facts dt {
  font-size: 13px;
  color: var(--gx-slate);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--gx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  color: var(--gx-gold);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-thesis {
  padding: clamp(56px, 7vw, 96px) 0;
}

.page-about .about-thesis__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-thesis__body .gx-p + .gx-p {
  margin-top: 16px;
}

.page-about .about-thesis__aside {
  padding-left: 16px;
  border-left: 2px solid var(--gx-line-strong);
}

.page-about .about-thesis__aside p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gx-slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(56px, 7vw, 100px) 0;
  background: linear-gradient(158deg, rgba(7, 54, 60, 0.62) 0%, rgba(6, 11, 30, 0.15) 72%);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-team__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-team__intro {
  min-width: 0;
}

.page-about .about-team__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .about-team__tabs {
  display: inline-flex;
  gap: 4px;
  margin: 20px 0 16px;
  padding: 4px;
  border: 1px solid var(--about-rule-soft);
  border-radius: 999px;
  background: var(--gx-glass);
}

.page-about .about-team__tabs label {
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--gx-slate);
  cursor: pointer;
  transition: color 180ms var(--gx-ease), background 180ms var(--gx-ease);
}

.page-about .about-team__tabs label:hover {
  color: var(--gx-mist);
}

.page-about #team-view-num:checked ~ .about-team__tabs label[for="team-view-num"],
.page-about #team-view-duty:checked ~ .about-team__tabs label[for="team-view-duty"] {
  background: var(--gx-cyan);
  color: var(--gx-void);
  font-weight: 700;
}

.page-about #team-view-num:focus-visible ~ .about-team__tabs label[for="team-view-num"],
.page-about #team-view-duty:focus-visible ~ .about-team__tabs label[for="team-view-duty"] {
  outline: 2px solid var(--gx-cyan);
  outline-offset: 2px;
}

.page-about .about-team__panel--duty {
  display: none;
}

.page-about #team-view-duty:checked ~ .about-team__panel--num {
  display: none;
}

.page-about #team-view-duty:checked ~ .about-team__panel--duty {
  display: block;
}

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

.page-about .about-quad__cell {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  min-height: 96px;
  padding: 16px;
  background: linear-gradient(160deg, rgba(42, 26, 94, 0.82), rgba(23, 18, 58, 0.92));
  border: 1px solid var(--about-rule-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-quad__name {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gx-slate);
}

.page-about .about-quad__num {
  font-family: var(--gx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1;
  color: var(--gx-cyan);
}

.page-about .about-quad__cell--edit {
  background: linear-gradient(150deg, rgba(56, 232, 208, 0.18), rgba(23, 18, 58, 0.94) 62%);
  border-color: var(--gx-rule);
}

.page-about .about-quad__cell--edit .about-quad__num {
  font-size: clamp(38px, 8vw, 64px);
  color: var(--gx-mist);
}

.page-about .about-quad__cell--data {
  background: linear-gradient(160deg, rgba(124, 33, 64, 0.55), rgba(23, 18, 58, 0.92) 70%);
}

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

.page-about .about-duty li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  background: var(--gx-glass);
  border-left: 2px solid var(--gx-cyan);
}

.page-about .about-duty__num {
  font-family: var(--gx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  line-height: 1.2;
  color: var(--gx-gold);
}

.page-about .about-duty h3 {
  margin: 0 0 4px;
  font-size: 15px;
  color: var(--gx-mist);
}

.page-about .about-duty p {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--gx-slate);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  clip-path: polygon(0 10%, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gx-slate);
}

/* ---------- 流程带 ---------- */
.page-about .about-flow {
  padding: clamp(56px, 7vw, 100px) 0;
  background: linear-gradient(180deg, rgba(7, 54, 60, 0.5) 0%, rgba(6, 11, 30, 0) 78%);
}

.page-about .about-flow__head {
  max-width: 46ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-flow__track {
  position: relative;
  display: grid;
  gap: 12px;
}

.page-about .about-flow__rail {
  display: none;
  color: var(--gx-cyan);
}

.page-about .about-flow__node {
  position: relative;
  padding: 18px;
  background: rgba(23, 18, 58, 0.72);
  border: 1px solid var(--about-rule-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color 200ms var(--gx-ease), transform 200ms var(--gx-ease);
}

.page-about .about-flow__node:hover {
  transform: translateY(-2px);
  border-color: var(--gx-rule);
}

.page-about .about-flow__node summary {
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-flow__badge {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-family: var(--gx-font-mono);
  font-size: 13px;
  color: var(--gx-void);
  background: var(--gx-cyan);
  box-shadow: 0 0 0 4px rgba(56, 232, 208, 0.14);
}

.page-about .about-flow__node--final .about-flow__badge {
  background: var(--gx-gold);
  box-shadow: 0 0 0 4px rgba(242, 178, 62, 0.18);
}

.page-about .about-flow__name {
  font-family: var(--gx-font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gx-mist);
}

.page-about .about-flow__node p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--gx-slate);
}

/* ---------- 数据 ---------- */
.page-about .about-data {
  padding: clamp(56px, 7vw, 100px) 0;
  background: linear-gradient(118deg, rgba(23, 18, 58, 0.92) 0%, rgba(6, 11, 30, 0.35) 62%);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-data__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-data__stats {
  display: grid;
  gap: 2px;
}

.page-about .about-data__stat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-data__stat span {
  font-family: var(--gx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.5vw, 36px);
  line-height: 1;
  color: var(--gx-gold);
}

.page-about .about-data__stat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.62;
  color: var(--gx-slate);
}

.page-about .about-data__states ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-data__states li {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 14px 16px;
  background: var(--gx-glass);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-data__states p {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--gx-slate);
}

/* ---------- 版本演进 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 7vw, 104px) 0;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.26;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(6, 11, 30, 0.94) 0%, rgba(6, 11, 30, 0.66) 42%, rgba(6, 11, 30, 0.97) 100%);
}

.page-about .about-timeline__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-about .about-timeline__head {
  min-width: 0;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--gx-cyan) 0%, rgba(56, 232, 208, 0.12) 100%);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -24px;
  top: 19px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gx-cyan);
  box-shadow: 0 0 0 4px rgba(56, 232, 208, 0.16);
}

.page-about .about-timeline__item--now .about-timeline__dot {
  background: var(--gx-gold);
  box-shadow: 0 0 0 4px rgba(242, 178, 62, 0.22);
}

.page-about .about-timeline__body {
  padding: 14px 16px;
  background: rgba(23, 18, 58, 0.68);
  border: 1px solid var(--about-rule-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-timeline__item--now .about-timeline__body {
  border-color: rgba(242, 178, 62, 0.34);
  background: rgba(23, 18, 58, 0.85);
}

.page-about .about-timeline__body summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-timeline__ver {
  padding: 3px 9px;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gx-void);
  background: var(--gx-cyan);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-about .about-timeline__item--now .about-timeline__ver {
  background: var(--gx-gold);
}

.page-about .about-timeline__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--gx-mist);
}

.page-about .about-timeline__body p {
  margin: 12px 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.74;
  color: var(--gx-slate);
}

/* ---------- 覆盖与伙伴 ---------- */
.page-about .about-reach {
  padding: clamp(56px, 7vw, 96px) 0;
  background: linear-gradient(124deg, rgba(124, 33, 64, 0.88) 0%, rgba(42, 26, 94, 0.82) 58%, rgba(6, 11, 30, 0.9) 100%);
}

.page-about .about-reach__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-reach__main .gx-p + .gx-p {
  margin-top: 16px;
}

.page-about .about-reach__main .gx-p {
  color: var(--gx-mist);
}

.page-about .about-reach__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-reach__stats li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(6, 11, 30, 0.44);
  border: 1px solid rgba(242, 245, 252, 0.16);
}

.page-about .about-reach__stats span {
  font-family: var(--gx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4.5vw, 32px);
  line-height: 1;
  color: var(--gx-gold);
}

.page-about .about-reach__stats p {
  margin: 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--gx-mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: clamp(52px, 7vw, 92px) 0 clamp(64px, 8vw, 104px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 22px;
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-data__states ul {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-cover__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-thesis__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 3fr);
    align-items: start;
    gap: clamp(20px, 3vw, 44px);
  }

  .page-about .about-thesis__body {
    margin-top: 44px;
  }

  .page-about .about-thesis__aside {
    margin-top: 96px;
  }

  .page-about .about-flow__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    padding-top: 28px;
  }

  .page-about .about-flow__rail {
    display: block;
    position: absolute;
    left: 1%;
    top: 4px;
    width: 98%;
    height: 4px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: end;
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-quad {
    grid-template-columns: 1.7fr 0.9fr;
    grid-template-rows: 1.7fr 0.9fr 0.55fr;
    height: clamp(400px, 38vw, 470px);
  }

  .page-about .about-quad__cell--edit {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-about .about-quad__cell--data {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-quad__cell--member {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .about-quad__cell--tech {
    grid-column: 1 / -1;
    grid-row: 3;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 980px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-data__states {
    grid-column: 1 / -1;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    align-items: start;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__node,
  .page-about .about-team__tabs label {
    transition: none;
  }

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

.page-about {
  --gx-rule: currentColor;
}