.page-about {
  --about-gap: clamp(20px, 3vw, 36px);
  --about-line: 1px solid var(--line);
  color: var(--snow);
}

/* ---------- 首屏：错位两栏品牌陈述 ---------- */
.page-about .about-intro {
  padding-top: clamp(16px, 2.4vw, 28px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-intro__copy {
  position: relative;
  border-left: 3px solid var(--pulse);
  padding-left: clamp(16px, 2vw, 24px);
}

.page-about .about-intro__copy .bd-h1 {
  margin: 10px 0 18px;
}

.page-about .about-intro__lede {
  font-size: 17px;
  line-height: 1.75;
  color: var(--snow);
  max-width: 62ch;
  margin: 0 0 14px;
}

.page-about .about-intro__note {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
  margin: 0 0 24px;
}

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

.page-about .about-intro__figure {
  position: relative;
  margin: 0;
}

.page-about .about-intro__corner {
  position: absolute;
  right: -10px;
  bottom: 46px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--pulse);
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: .14em;
  box-shadow: var(--shadow-hard);
}

.page-about .about-intro__corner::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--ink);
  border-radius: 50%;
}

.page-about .about-intro__cap {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-intro__figure .bd-media {
  position: relative;
}

/* ---------- 前中后三段 ---------- */
.page-about .about-work__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 68ch;
}

.page-about .about-work__grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: 1fr;
}

.page-about .about-work__item {
  position: relative;
  background: var(--ink-2);
  border: 3px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: 26px 22px 24px;
  transition: border-color .2s ease, transform .2s ease;
}

.page-about .about-work__item:hover {
  border-color: var(--pulse);
  transform: translateX(2px);
}

.page-about .about-work__no {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 2px var(--line);
  margin-bottom: 14px;
}

.page-about .about-work__item .bd-h3 {
  margin: 0 0 10px;
}

.page-about .about-work__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 数据团队 ---------- */
.page-about .about-team__head {
  display: grid;
  gap: 18px;
  align-items: end;
}

.page-about .about-team__count {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0;
  border-left: 3px solid var(--flare);
  padding-left: 16px;
}

.page-about .about-team__num {
  color: var(--flare);
  font-size: clamp(48px, 9vw, 84px);
  line-height: .9;
}

.page-about .about-team__unit {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-team__panel {
  margin-top: clamp(22px, 3vw, 34px);
  border: 3px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team__table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__table th,
.page-about .about-team__table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: var(--about-line);
  font-size: 15px;
  line-height: 1.65;
  vertical-align: top;
}

.page-about .about-team__table thead th {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
  text-transform: uppercase;
  background: rgba(18, 58, 92, .35);
}

.page-about .about-team__table tbody th {
  color: var(--pulse);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-team__table tbody td {
  color: var(--snow);
}

.page-about .about-team__table tbody tr:last-child th,
.page-about .about-team__table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-team__foot {
  margin: 0;
  padding: 16px 18px;
  border-top: 3px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 协作网络 ---------- */
.page-about .about-net__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-net__copy > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  margin: 12px 0 0;
  max-width: 68ch;
}

.page-about .about-net__flow {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .about-net__flow li {
  position: relative;
  padding: 16px 0 16px 18px;
  border-bottom: var(--about-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-net__flow li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 6px;
  height: 6px;
  background: var(--pulse);
}

.page-about .about-net__step {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--snow);
  margin-bottom: 4px;
}

.page-about .about-net__figure {
  margin: 0;
  border: 3px solid var(--line);
  background:
    radial-gradient(circle at 50% 50%, rgba(46, 242, 166, .12), transparent 62%),
    var(--ink-2);
  box-shadow: var(--shadow-hard);
  padding: 12px;
}

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

.page-about .about-net__line {
  stroke: var(--line);
  stroke-width: 2;
  transition: stroke .2s ease;
}

.page-about .about-net__dot {
  fill: var(--ink);
  stroke: var(--steel);
  stroke-width: 2;
  transition: stroke .2s ease, fill .2s ease;
}

.page-about .about-net__label {
  fill: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  text-anchor: middle;
  transition: fill .2s ease;
}

.page-about .about-net__g:hover .about-net__line {
  stroke: var(--pulse);
  stroke-width: 3;
}

.page-about .about-net__g:hover .about-net__dot {
  stroke: var(--pulse);
  fill: var(--pulse);
}

.page-about .about-net__g:hover .about-net__label {
  fill: var(--snow);
}

.page-about .about-net__core circle {
  fill: var(--ink);
  stroke: var(--flare);
  stroke-width: 3;
}

.page-about .about-net__core text {
  fill: var(--snow);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 24px;
  text-anchor: middle;
  letter-spacing: .06em;
}

.page-about .about-net__cap {
  margin: 10px 6px 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 本地赛事 ---------- */
.page-about .about-local__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-local__copy > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  margin: 12px 0 0;
  max-width: 66ch;
}

.page-about .about-local__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-local__list li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-top: var(--about-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-local__list li:last-child {
  border-bottom: var(--about-line);
}

.page-about .about-local__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 8px;
  background: var(--flare);
}

.page-about .about-local__list strong {
  color: var(--snow);
  font-weight: 700;
  margin-right: 4px;
}

.page-about .about-local__more {
  margin: 20px 0 0;
  font-size: 15px;
}

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

.page-about .about-local__figure .bd-media {
  position: relative;
}

.page-about .about-local__figure figcaption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 演进节奏 ---------- */
.page-about .about-evo {
  position: relative;
  overflow: hidden;
  background: var(--grad-night);
}

.page-about .about-evo__bg {
  position: absolute;
  inset: 0;
  opacity: .22;
  pointer-events: none;
}

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

.page-about .about-evo__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-evo__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
}

.page-about .about-evo__body {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 20px;
}

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

.page-about .about-evo__rail {
  position: relative;
  display: grid;
  gap: 4px;
  padding-left: 22px;
}

.page-about .about-evo__rail::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--line);
}

.page-about .about-evo__node {
  position: relative;
  display: block;
  cursor: pointer;
  padding: 14px 16px 14px 18px;
  border: 2px solid var(--line);
  background: rgba(10, 32, 56, .82);
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}

.page-about .about-evo__node:hover {
  border-color: var(--pulse);
  transform: translateX(2px);
}

.page-about .about-evo__dot {
  position: absolute;
  left: -27px;
  top: 22px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--steel);
  border-radius: 50%;
}

.page-about .about-evo__node--major .about-evo__dot {
  width: 16px;
  height: 16px;
  left: -29px;
  top: 20px;
  border-color: var(--flare);
}

.page-about .about-evo__k {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--snow);
  margin-bottom: 4px;
}

.page-about .about-evo__t {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-evo__panels {
  border: 3px solid var(--line);
  background: rgba(5, 18, 31, .86);
  box-shadow: var(--shadow-hard);
  padding: 24px 22px;
  min-height: 190px;
}

.page-about .about-evo__panel {
  display: none;
}

.page-about .about-evo__panel .bd-h3 {
  margin: 14px 0 10px;
}

.page-about .about-evo__panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-evo__radio:nth-of-type(1):checked ~ .about-evo__panels > .about-evo__panel:nth-of-type(1),
.page-about .about-evo__radio:nth-of-type(2):checked ~ .about-evo__panels > .about-evo__panel:nth-of-type(2),
.page-about .about-evo__radio:nth-of-type(3):checked ~ .about-evo__panels > .about-evo__panel:nth-of-type(3),
.page-about .about-evo__radio:nth-of-type(4):checked ~ .about-evo__panels > .about-evo__panel:nth-of-type(4),
.page-about .about-evo__radio:nth-of-type(5):checked ~ .about-evo__panels > .about-evo__panel:nth-of-type(5) {
  display: block;
}

.page-about .about-evo__radio:nth-of-type(1):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(1),
.page-about .about-evo__radio:nth-of-type(2):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(2),
.page-about .about-evo__radio:nth-of-type(3):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(3),
.page-about .about-evo__radio:nth-of-type(4):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(4),
.page-about .about-evo__radio:nth-of-type(5):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(5) {
  border-color: var(--pulse);
  background: rgba(46, 242, 166, .1);
}

.page-about .about-evo__radio:nth-of-type(1):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(1) .about-evo__dot,
.page-about .about-evo__radio:nth-of-type(2):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(2) .about-evo__dot,
.page-about .about-evo__radio:nth-of-type(3):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(3) .about-evo__dot,
.page-about .about-evo__radio:nth-of-type(4):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(4) .about-evo__dot,
.page-about .about-evo__radio:nth-of-type(5):checked ~ .about-evo__rail > .about-evo__node:nth-of-type(5) .about-evo__dot {
  background: var(--pulse);
  border-color: var(--pulse);
}

.page-about .about-evo__radio:focus-visible:nth-of-type(1) ~ .about-evo__rail > .about-evo__node:nth-of-type(1),
.page-about .about-evo__radio:focus-visible:nth-of-type(2) ~ .about-evo__rail > .about-evo__node:nth-of-type(2),
.page-about .about-evo__radio:focus-visible:nth-of-type(3) ~ .about-evo__rail > .about-evo__node:nth-of-type(3),
.page-about .about-evo__radio:focus-visible:nth-of-type(4) ~ .about-evo__rail > .about-evo__node:nth-of-type(4),
.page-about .about-evo__radio:focus-visible:nth-of-type(5) ~ .about-evo__rail > .about-evo__node:nth-of-type(5) {
  outline: 2px solid var(--pulse);
  outline-offset: 2px;
}

/* ---------- 保障与承诺 ---------- */
.page-about .about-trust__grid {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: 1fr;
}

.page-about .about-trust__item {
  border-top: 3px solid var(--line);
  padding-top: 18px;
}

.page-about .about-trust__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: .02em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  margin-bottom: 12px;
}

.page-about .about-trust__num .bd-display {
  font-size: clamp(40px, 7vw, 60px);
  line-height: 1;
  color: var(--flare);
}

.page-about .about-trust__item .bd-h3 {
  margin: 0 0 10px;
}

.page-about .about-trust__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-trust__note {
  margin: clamp(30px, 4vw, 48px) auto 0;
  max-width: 720px;
}

.page-about .about-trust__note p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--snow);
  margin: 0;
}

.page-about .about-trust__note a {
  color: var(--pulse);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-trust__note a:hover {
  color: var(--flare);
}

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

  .page-about .about-team__head {
    grid-template-columns: 1fr auto;
  }

  .page-about .about-trust__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-intro__copy {
    padding-top: 8px;
  }

  .page-about .about-net__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: center;
  }

  .page-about .about-evo__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }
}

@media (max-width: 640px) {
  .page-about .about-team__table thead {
    display: none;
  }

  .page-about .about-team__table tbody tr {
    display: grid;
    gap: 6px;
    padding: 16px 18px;
    border-bottom: var(--about-line);
  }

  .page-about .about-team__table tbody tr:last-child {
    border-bottom: 0;
  }

  .page-about .about-team__table th,
  .page-about .about-team__table td {
    padding: 0;
    border-bottom: 0;
  }

  .page-about .about-team__table tbody td::before {
    content: attr(data-k) "：";
    color: var(--mist);
    font-size: 13px;
  }

  .page-about .about-evo__panels {
    min-height: 0;
  }

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

  .page-about .about-evo__dot {
    left: -23px;
  }

  .page-about .about-evo__node--major .about-evo__dot {
    left: -25px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-work__item,
  .page-about .about-evo__node,
  .page-about .about-net__line,
  .page-about .about-net__dot,
  .page-about .about-net__label {
    transition: none;
  }
}