.page-about {
  --ab-body: #c3cfd8;
  --ab-quiet: #9aa9b4;
  --ab-ring: rgba(233, 241, 246, .07);
  --ab-sec-y: clamp(52px, 9vw, 108px);
  background: var(--ly-ink);
  color: var(--ly-snow);
}

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

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px) 0 clamp(36px, 7vw, 82px);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: -160px;
  height: 620px;
  pointer-events: none;
  background:
    radial-gradient(58% 76% at 18% 4%, rgba(61, 255, 158, .15), transparent 66%),
    radial-gradient(46% 68% at 86% 12%, rgba(58, 168, 255, .18), transparent 70%),
    linear-gradient(180deg, rgba(27, 77, 107, .55), rgba(11, 15, 20, 0) 78%);
}

.page-about .ab-hero__grid {
  margin-top: clamp(20px, 4vw, 40px);
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  align-items: end;
}

.page-about .ab-hero__title {
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.14;
  max-width: 21ch;
  margin-top: 14px;
}

.page-about .ab-hero__rule {
  width: 78px;
  height: 3px;
  border-radius: 999px;
  margin: 22px 0 24px;
  background: linear-gradient(90deg, var(--ly-neon), var(--ly-blue));
}

.page-about .ab-lede,
.page-about .ly-lede {
  max-width: 60ch;
}

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

.page-about .ab-fact {
  display: grid;
  grid-template-columns: minmax(96px, auto) 1fr;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ly-line-soft);
}

.page-about .ab-fact:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-fact__num {
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-snow);
  letter-spacing: .01em;
}

.page-about .ab-fact__label {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ly-mist);
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: var(--ab-sec-y) 0;
  border-top: 1px solid var(--ly-line-soft);
}

.page-about .ab-head {
  max-width: 740px;
  margin-bottom: clamp(30px, 5vw, 54px);
}

.page-about .ab-head .ly-h2 {
  margin-top: 12px;
}

.page-about .ab-head .ly-lede {
  margin-top: 16px;
  color: var(--ab-body);
}

.page-about .ab-body {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ab-body);
  max-width: 62ch;
}

/* ---------- 01 时间轴 ---------- */
.page-about .ab-tl-media {
  position: relative;
  border-radius: var(--ly-r-lg);
  overflow: hidden;
  margin-bottom: clamp(34px, 6vw, 62px);
  background: var(--ly-panel);
}

.page-about .ab-tl-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 15, 20, 0) 42%, rgba(11, 15, 20, .88) 100%);
}

.page-about .ab-tl-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 900;
  object-fit: cover;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0 auto;
  padding: 0 0 0 3px;
  max-width: 880px;
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 clamp(30px, 5vw, 48px) 44px;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: -4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(233, 241, 246, .16), var(--ly-line-soft));
}

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

.page-about .ab-node:last-child::before {
  display: none;
}

.page-about .ab-node::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 13px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ly-ink);
  border: 2px solid var(--ab-node-accent, var(--ly-neon));
  box-shadow: 0 0 0 5px rgba(11, 15, 20, .92);
}

.page-about .ab-node:nth-child(1) { --ab-node-accent: var(--ly-neon); }
.page-about .ab-node:nth-child(2) { --ab-node-accent: var(--ly-blue); }
.page-about .ab-node:nth-child(3) { --ab-node-accent: var(--ly-orange); }
.page-about .ab-node:nth-child(4) { --ab-node-accent: var(--ly-neon); }
.page-about .ab-node:nth-child(5) { --ab-node-accent: var(--ly-blue); }

.page-about .ab-node__stage {
  display: inline-block;
  margin: 0 0 12px;
  padding: 5px 13px;
  font-size: 11.5px;
  letter-spacing: .1em;
  border-radius: var(--ly-pill);
  color: var(--ab-node-accent, var(--ly-neon));
  border: 1px solid var(--ly-line);
  background: rgba(233, 241, 246, .03);
}

.page-about .ab-node .ly-h3 {
  margin-bottom: 12px;
  max-width: 26ch;
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-body);
  max-width: 62ch;
}

.page-about .ab-more {
  margin-top: 14px;
  border-top: 1px solid var(--ly-line-soft);
}

.page-about .ab-more summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 0 3px;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ly-mist);
  transition: color .25s var(--ly-ease);
}

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

.page-about .ab-more summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ly-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--ly-neon);
  transition: transform .3s var(--ly-ease);
}

.page-about .ab-more[open] summary::after {
  transform: rotate(45deg);
}

.page-about .ab-more summary:hover,
.page-about .ab-more summary:focus-visible {
  color: var(--ly-snow);
}

.page-about .ab-more p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ab-quiet);
  max-width: 60ch;
}

/* ---------- 02 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .ab-role {
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--ly-r-lg);
  border: 1px solid var(--ly-line);
  background: var(--ly-panel);
  transition: transform .3s var(--ly-ease), border-color .3s var(--ly-ease), background .3s var(--ly-ease);
}

.page-about .ab-role::before {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  border-radius: 999px;
  margin-bottom: 20px;
  background: var(--role-c, var(--ly-neon));
}

.page-about .ab-role--data { --role-c: var(--ly-neon); }
.page-about .ab-role--edit { --role-c: var(--ly-blue); }
.page-about .ab-role--care { --role-c: var(--ly-orange); }

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  transform: translateY(-3px);
  border-color: rgba(61, 255, 158, .26);
  background: var(--ly-panel-2);
}

.page-about .ab-role__name {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ly-mist);
}

.page-about .ab-role__count {
  margin: 10px 0 16px;
  font-size: clamp(32px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-snow);
}

.page-about .ab-role__count small {
  margin-left: 6px;
  font-size: 13px;
  font-weight: 400;
  color: var(--ly-mist);
}

.page-about .ab-role__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ab-body);
}

.page-about .ab-role__rhythm {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--ly-line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ly-mist);
  transition: color .3s var(--ly-ease);
}

.page-about .ab-role:hover .ab-role__rhythm {
  color: var(--ab-quiet);
}

.page-about .ab-team__figure {
  margin: clamp(28px, 4.5vw, 46px) 0 0;
  border-radius: var(--ly-r-lg);
  overflow: hidden;
  background: var(--ly-panel);
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1100 / 740;
  object-fit: cover;
}

.page-about .ab-team__figure figcaption {
  padding: 16px 20px 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ly-mist);
  border-top: 1px solid var(--ly-line-soft);
}

/* ---------- 03 赛事覆盖 ---------- */
.page-about .ab-sec--eco::before {
  content: "";
  position: absolute;
  inset: 10% -18% 10% 52%;
  pointer-events: none;
  background: radial-gradient(closest-side, rgba(58, 168, 255, .13), rgba(58, 168, 255, 0) 72%);
}

.page-about .ab-eco {
  display: grid;
  gap: clamp(28px, 4.5vw, 52px);
  align-items: start;
}

.page-about .ab-levels {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .ab-level {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px 8px 11px;
  border-radius: var(--ly-pill);
  font-size: 14px;
  color: var(--ly-snow);
  background: rgba(58, 168, 255, .08);
  border: 1px solid rgba(58, 168, 255, .22);
}

.page-about .ab-level__num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ly-blue);
}

.page-about .ab-metrics {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-metric {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ly-line-soft);
}

.page-about .ab-metric:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-metric__v {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-snow);
  min-width: 2.4ch;
  text-align: right;
}

.page-about .ab-metric__t {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ab-quiet);
}

.page-about .ab-eco__figure {
  margin: 0;
  border-radius: var(--ly-r-lg);
  overflow: hidden;
  border: 1px solid var(--ly-line);
  background: var(--ly-panel);
}

.page-about .ab-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
}

.page-about .ab-eco__figure figcaption {
  padding: 16px 20px 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ly-mist);
  border-top: 1px solid var(--ly-line-soft);
}

/* ---------- 04 更新节奏 ---------- */
.page-about .ab-cadence {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .ab-cadence__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-cadence__item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ly-line-soft);
}

.page-about .ab-cadence__item:first-child {
  padding-top: 0;
}

.page-about .ab-cadence__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-cadence__when {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ly-orange);
}

.page-about .ab-cadence__what {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ly-snow);
}

.page-about .ab-report {
  padding: 22px;
  border-radius: var(--ly-r-lg);
  border: 1px solid var(--ly-line);
  background: linear-gradient(158deg, rgba(27, 77, 107, .5), rgba(20, 28, 38, .92) 72%);
}

.page-about .ab-report__art {
  display: block;
  width: 100%;
  height: auto;
  max-width: 260px;
  margin: 0 auto 20px;
}

.page-about .ab-report__num {
  margin: 0;
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
  color: var(--ly-snow);
}

.page-about .ab-report__label {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ab-quiet);
}

/* ---------- 05 资质与合规 ---------- */
.page-about .ab-badges {
  display: grid;
  gap: 14px;
}

.page-about .ab-badge {
  border-radius: var(--ly-r-md);
  border: 1px solid var(--ly-line);
  background: rgba(233, 241, 246, .02);
  transition: border-color .3s var(--ly-ease), background .3s var(--ly-ease);
}

.page-about .ab-badge[open] {
  border-color: rgba(61, 255, 158, .3);
  background: rgba(61, 255, 158, .04);
}

.page-about .ab-badge summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
}

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

.page-about .ab-badge summary::after {
  content: "›";
  margin-left: auto;
  font-family: var(--ly-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ly-mist);
  transition: transform .3s var(--ly-ease), color .3s var(--ly-ease);
}

.page-about .ab-badge[open] summary::after {
  transform: rotate(90deg);
  color: var(--ly-neon);
}

.page-about .ab-badge__seal {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--ly-neon);
  border: 1px solid rgba(61, 255, 158, .3);
  background: rgba(61, 255, 158, .06);
}

.page-about .ab-badge__name {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ly-snow);
}

.page-about .ab-badge p {
  margin: 0;
  padding: 0 20px 22px 80px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-quiet);
}

.page-about .ab-trust__note {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--ly-line-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ly-mist);
  max-width: 70ch;
}

/* ---------- 06 继续浏览 ---------- */
.page-about .ab-sec--next {
  border-top: 1px solid var(--ly-line-soft);
}

.page-about .ab-next__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .ab-next__card {
  display: grid;
  gap: 10px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  border-radius: var(--ly-r-md);
  border: 1px solid var(--ly-line);
  background: var(--ly-panel);
  transition: transform .3s var(--ly-ease), border-color .3s var(--ly-ease), background .3s var(--ly-ease);
}

.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(58, 168, 255, .35);
  background: var(--ly-panel-2);
}

.page-about .ab-next__k {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ly-blue);
}

.page-about .ab-next__t {
  font-family: var(--ly-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--ly-snow);
}

.page-about .ab-next__d {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ly-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-cadence__item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .ab-badges {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .ab-team__grid {
    grid-template-columns: 1.2fr 1fr .86fr;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(272px, .78fr);
  }

  .page-about .ab-eco {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about .ab-cadence {
    grid-template-columns: minmax(0, 1.4fr) minmax(268px, .6fr);
  }
}

@media (min-width: 1200px) {
  .page-about .ab-timeline {
    margin-left: calc(50% - 440px);
    margin-right: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role,
  .page-about .ab-next__card,
  .page-about .ab-more summary::after,
  .page-about .ab-badge summary::after {
    transition: none;
  }

  .page-about .ab-role:hover,
  .page-about .ab-next__card:hover {
    transform: none;
  }
}