.page-about {
  --ab-hair: 1px solid rgba(140, 162, 198, .26);
  --ab-panel-bg: linear-gradient(155deg, rgba(19, 35, 72, .78), rgba(4, 10, 22, .94));
  --ab-block-gap: clamp(32px, 5vw, 60px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  margin-top: clamp(16px, 2.6vw, 28px);
  padding: clamp(24px, 4.4vw, 52px) 0 clamp(32px, 5.6vw, 68px);
  border-bottom: 1px solid rgba(43, 240, 220, .2);
  background:
    radial-gradient(115% 85% at 92% 0%, rgba(43, 240, 220, .10), transparent 62%),
    radial-gradient(85% 70% at 0% 100%, rgba(255, 61, 46, .08), transparent 62%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-years {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-year {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 13px;
  border: 1px solid var(--ink-700);
  background: rgba(10, 20, 40, .7);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-year__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-year__tag {
  font-size: 12px;
  color: var(--steel-400);
  letter-spacing: .02em;
}

.page-about .ab-year:hover,
.page-about .ab-year[aria-current="true"] {
  border-color: var(--cyan-400);
  background: rgba(43, 240, 220, .1);
}

.page-about .ab-year:hover .ab-year__tag,
.page-about .ab-year[aria-current="true"] .ab-year__tag {
  color: var(--paper-100);
}

.page-about .ab-hero__main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--paper-100);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 4px 0 0;
  padding: 16px 0 0;
  border-top: var(--ab-hair);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(94px, 1fr));
  gap: 14px 18px;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--steel-400);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .ab-hero__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-card);
  background: var(--ink-850);
}

.page-about .ab-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-about .ab-hero__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 132px minmax(0, 1fr) minmax(0, .86fr);
    gap: 28px 34px;
    align-items: start;
  }

  .page-about .ab-years {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--ink-700);
  }

  .page-about .ab-year {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -2px;
    padding: 11px 0 11px 14px;
    background: transparent;
    white-space: normal;
  }

  .page-about .ab-year[aria-current="true"] {
    border-left-color: var(--cyan-400);
    background: rgba(43, 240, 220, .07);
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(34px, 5.6vw, 72px);
}

.page-about .ab-toc {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  padding: 14px 16px;
}

.page-about .ab-toc .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-about .ab-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .ab-toc .toc__link {
  display: block;
  padding: 7px 11px;
  font-size: 14px;
  color: var(--steel-400);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-toc .toc__link:hover,
.page-about .ab-toc .toc__link[aria-current="true"] {
  color: var(--cyan-400);
  border-left-color: var(--cyan-400);
  background: rgba(43, 240, 220, .07);
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-toc .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
}

/* ---------- 区块通用 ---------- */
.page-about .ab-flow {
  min-width: 0;
}

.page-about .ab-sec {
  padding: clamp(30px, 4.6vw, 54px) 0;
  border-top: 1px solid rgba(43, 240, 220, .16);
  scroll-margin-top: 100px;
}

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

.page-about .ab-sec .section__head {
  max-width: 44em;
}

.page-about .ab-sec .section__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-sec .section__lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-sub {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.3vw, 24px);
  letter-spacing: .01em;
  color: var(--cyan-400);
}

/* ---------- 01 服务 ---------- */
.page-about .ab-serve {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
}

.page-about .ab-serve__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 20px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-serve__item:first-child {
  border-top: var(--ab-hair);
}

.page-about .ab-serve__idx {
  grid-row: span 2;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--blaze-500);
}

.page-about .ab-serve__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 23px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-serve__text {
  margin: 5px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

/* ---------- 02 时间线 ---------- */
.page-about .ab-tl {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  gap: 12px;
}

.page-about .ab-tl__item {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .85);
  scroll-margin-top: 104px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-tl__item:hover {
  border-color: rgba(43, 240, 220, .6);
}

.page-about .ab-tl__head {
  margin: 0;
}

.page-about .ab-tl__btn {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 15px 16px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__name {
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 21px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-tl__cue {
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan-400);
  border-bottom: 2px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-tl__item[data-open="false"] .ab-tl__cue {
  transform: rotate(-45deg);
}

.page-about .ab-tl__panel {
  padding: 0 16px 18px 16px;
  color: var(--steel-400);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .ab-tl__panel p {
  margin: 0;
  max-width: 46em;
}

@media (min-width: 640px) {
  .page-about .ab-tl__btn {
    grid-template-columns: 78px minmax(0, 1fr) 14px;
    padding: 16px 20px;
  }

  .page-about .ab-tl__panel {
    padding: 0 20px 18px 110px;
  }
}

/* ---------- 03 球队库与案例 ---------- */
.page-about .ab-lib {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-lib__col {
  border-left: 2px solid var(--ink-700);
  padding-left: 16px;
}

.page-about .ab-lib__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-facts {
  margin: 16px 0 0;
}

.page-about .ab-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 9px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-facts__row dt {
  font-size: 14px;
  color: var(--steel-400);
}

.page-about .ab-facts__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--amber-400);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-media {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-media .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .ab-media .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 760px) {
  .page-about .ab-lib {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

/* ---------- 04 数据面板 ---------- */
.page-about .ab-panels {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 12px;
}

.page-about .ab-panel {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-panel:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-panel__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-panel__num small {
  margin-left: 3px;
  font-size: .46em;
  font-weight: 400;
  color: var(--steel-400);
}

.page-about .ab-panel__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-100);
}

.page-about .ab-panel__note {
  margin-top: 6px;
  padding-top: 9px;
  border-top: 1px dashed rgba(140, 162, 198, .32);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel-400);
  opacity: .62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-panel:hover .ab-panel__note {
  opacity: 1;
  color: var(--cyan-400);
}

.page-about .ab-data {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .ab-data__text {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--steel-400);
}

.page-about .ab-data__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-data__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-data__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 860px) {
  .page-about .ab-data {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: start;
    gap: 32px;
  }
}

/* ---------- 05 设备 ---------- */
.page-about .ab-devices {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-devices__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan-650);
  background: rgba(19, 35, 72, .42);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-devices__row:hover {
  border-left-color: var(--cyan-400);
  background: rgba(19, 35, 72, .68);
}

.page-about .ab-devices__plat {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
}

.page-about .ab-devices__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

@media (min-width: 700px) {
  .page-about .ab-devices__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .ab-devices__desc {
    max-width: 44em;
  }
}

/* ---------- 06 合作与更新 ---------- */
.page-about .ab-cards {
  margin-top: clamp(22px, 3.2vw, 34px);
  padding-bottom: 10px;
}

.page-about .ab-card {
  min-width: 240px;
  max-width: 280px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-card:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-card__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--blaze-500);
}

.page-about .ab-card .card__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-card .card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel-400);
}

.page-about .ab-partner__note {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-partner__note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 220, .45);
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-partner__note a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 07 品牌识别 ---------- */
.page-about .ab-ident {
  margin-top: clamp(22px, 3.2vw, 34px);
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: var(--shadow-card);
}

.page-about .ab-ident__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 18px 18px 16px;
  border-bottom: var(--ab-hair);
}

.page-about .ab-ident__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 38px);
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-ident__sub {
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--cyan-400);
}

.page-about .ab-ident__list {
  margin: 0;
  padding: 4px 18px 14px;
}

.page-about .ab-ident__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 11px 0;
  border-bottom: var(--ab-hair);
}

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

.page-about .ab-ident__row dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel-400);
}

.page-about .ab-ident__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 15.5px;
  color: var(--paper-100);
  word-break: break-word;
}

.page-about .ab-ident__row dd .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-ident .copy-btn {
  padding: 4px 10px;
  font-size: 12.5px;
  line-height: 1.4;
  border: 1px solid var(--ink-700);
  background: rgba(19, 35, 72, .7);
  color: var(--steel-400);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-ident .copy-btn:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.page-about .ab-ident .copy-btn[data-copied] {
  border-color: var(--mint-400);
  color: var(--mint-400);
  background: rgba(110, 247, 174, .1);
}

@media (min-width: 620px) {
  .page-about .ab-ident__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ---------- 页尾路径 ---------- */
.page-about .ab-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-about .ab-next .next-hop__link {
  padding: 10px 16px;
  border: 2px solid var(--ink-700);
  background: rgba(19, 35, 72, .55);
  color: var(--paper-100);
  font-size: 14.5px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-next .next-hop__link:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(43, 240, 220, .08);
}
</main>

.page-about {
  --ab-hair: 1px solid rgba(140, 162, 198, .26);
  --ab-panel-bg: linear-gradient(155deg, rgba(19, 35, 72, .78), rgba(4, 10, 22, .94));
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  margin-top: clamp(16px, 2.6vw, 28px);
  padding: clamp(24px, 4.4vw, 52px) 0 clamp(32px, 5.6vw, 68px);
  border-bottom: 1px solid rgba(43, 240, 220, .2);
  background:
    radial-gradient(115% 85% at 92% 0%, rgba(43, 240, 220, .10), transparent 62%),
    radial-gradient(85% 70% at 0% 100%, rgba(255, 61, 46, .08), transparent 62%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-years {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-year {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 13px;
  border: 1px solid var(--ink-700);
  background: rgba(10, 20, 40, .7);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-year__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-year__tag {
  font-size: 12px;
  color: var(--steel-400);
  letter-spacing: .02em;
}

.page-about .ab-year:hover,
.page-about .ab-year[aria-current="true"] {
  border-color: var(--cyan-400);
  background: rgba(43, 240, 220, .1);
}

.page-about .ab-year:hover .ab-year__tag,
.page-about .ab-year[aria-current="true"] .ab-year__tag {
  color: var(--paper-100);
}

.page-about .ab-hero__main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--paper-100);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 4px 0 0;
  padding: 16px 0 0;
  border-top: var(--ab-hair);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(94px, 1fr));
  gap: 14px 18px;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--steel-400);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .ab-hero__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-card);
  background: var(--ink-850);
}

.page-about .ab-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-about .ab-hero__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 132px minmax(0, 1fr) minmax(0, .86fr);
    gap: 28px 34px;
    align-items: start;
  }

  .page-about .ab-years {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--ink-700);
  }

  .page-about .ab-year {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -2px;
    padding: 11px 0 11px 14px;
    background: transparent;
    white-space: normal;
  }

  .page-about .ab-year[aria-current="true"] {
    border-left-color: var(--cyan-400);
    background: rgba(43, 240, 220, .07);
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(34px, 5.6vw, 72px);
}

.page-about .ab-toc {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  padding: 14px 16px;
}

.page-about .ab-toc .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-about .ab-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .ab-toc .toc__link {
  display: block;
  padding: 7px 11px;
  font-size: 14px;
  color: var(--steel-400);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-toc .toc__link:hover,
.page-about .ab-toc .toc__link[aria-current="true"] {
  color: var(--cyan-400);
  border-left-color: var(--cyan-400);
  background: rgba(43, 240, 220, .07);
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-toc .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
}

/* ---------- 区块通用 ---------- */
.page-about .ab-flow {
  min-width: 0;
}

.page-about .ab-sec {
  padding: clamp(30px, 4.6vw, 54px) 0;
  border-top: 1px solid rgba(43, 240, 220, .16);
  scroll-margin-top: 100px;
}

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

.page-about .ab-sec .section__head {
  max-width: 44em;
}

.page-about .ab-sec .section__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-sec .section__lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-sub {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.3vw, 24px);
  letter-spacing: .01em;
  color: var(--cyan-400);
}

/* ---------- 01 服务 ---------- */
.page-about .ab-serve {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
}

.page-about .ab-serve__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 20px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-serve__item:first-child {
  border-top: var(--ab-hair);
}

.page-about .ab-serve__idx {
  grid-row: span 2;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--blaze-500);
}

.page-about .ab-serve__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 23px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-serve__text {
  margin: 5px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

/* ---------- 02 时间线 ---------- */
.page-about .ab-tl {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  gap: 12px;
}

.page-about .ab-tl__item {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .85);
  scroll-margin-top: 104px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-tl__item:hover {
  border-color: rgba(43, 240, 220, .6);
}

.page-about .ab-tl__head {
  margin: 0;
}

.page-about .ab-tl__btn {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 15px 16px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__name {
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 21px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-tl__cue {
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan-400);
  border-bottom: 2px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-tl__item[data-open="false"] .ab-tl__cue {
  transform: rotate(-45deg);
}

.page-about .ab-tl__panel {
  padding: 0 16px 18px 16px;
  color: var(--steel-400);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .ab-tl__panel p {
  margin: 0;
  max-width: 46em;
}

@media (min-width: 640px) {
  .page-about .ab-tl__btn {
    grid-template-columns: 78px minmax(0, 1fr) 14px;
    padding: 16px 20px;
  }

  .page-about .ab-tl__panel {
    padding: 0 20px 18px 110px;
  }
}

/* ---------- 03 球队库与案例 ---------- */
.page-about .ab-lib {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-lib__col {
  border-left: 2px solid var(--ink-700);
  padding-left: 16px;
}

.page-about .ab-lib__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-facts {
  margin: 16px 0 0;
}

.page-about .ab-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 9px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-facts__row dt {
  font-size: 14px;
  color: var(--steel-400);
}

.page-about .ab-facts__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--amber-400);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-media {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-media .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .ab-media .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 760px) {
  .page-about .ab-lib {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

/* ---------- 04 数据面板 ---------- */
.page-about .ab-panels {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 12px;
}

.page-about .ab-panel {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-panel:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-panel__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-panel__num small {
  margin-left: 3px;
  font-size: .46em;
  font-weight: 400;
  color: var(--steel-400);
}

.page-about .ab-panel__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-100);
}

.page-about .ab-panel__note {
  margin-top: 6px;
  padding-top: 9px;
  border-top: 1px dashed rgba(140, 162, 198, .32);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel-400);
  opacity: .62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-panel:hover .ab-panel__note {
  opacity: 1;
  color: var(--cyan-400);
}

.page-about .ab-data {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .ab-data__text {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--steel-400);
}

.page-about .ab-data__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-data__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-data__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 860px) {
  .page-about .ab-data {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: start;
    gap: 32px;
  }
}

/* ---------- 05 设备 ---------- */
.page-about .ab-devices {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-devices__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan-650);
  background: rgba(19, 35, 72, .42);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-devices__row:hover {
  border-left-color: var(--cyan-400);
  background: rgba(19, 35, 72, .68);
}

.page-about .ab-devices__plat {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
}

.page-about .ab-devices__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

@media (min-width: 700px) {
  .page-about .ab-devices__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .ab-devices__desc {
    max-width: 44em;
  }
}

/* ---------- 06 合作与更新 ---------- */
.page-about .ab-cards {
  margin-top: clamp(22px, 3.2vw, 34px);
  padding-bottom: 10px;
}

.page-about .ab-card {
  min-width: 240px;
  max-width: 280px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-card:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-card__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--blaze-500);
}

.page-about .ab-card .card__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-card .card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel-400);
}

.page-about .ab-partner__note {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-partner__note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 220, .45);
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-partner__note a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 07 品牌识别 ---------- */
.page-about .ab-ident {
  margin-top: clamp(22px, 3.2vw, 34px);
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: var(--shadow-card);
}

.page-about .ab-ident__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 18px 18px 16px;
  border-bottom: var(--ab-hair);
}

.page-about .ab-ident__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 38px);
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-ident__sub {
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--cyan-400);
}

.page-about .ab-ident__list {
  margin: 0;
  padding: 4px 18px 14px;
}

.page-about .ab-ident__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 11px 0;
  border-bottom: var(--ab-hair);
}

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

.page-about .ab-ident__row dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel-400);
}

.page-about .ab-ident__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 15.5px;
  color: var(--paper-100);
  word-break: break-word;
}

.page-about .ab-ident__row dd .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-ident .copy-btn {
  padding: 4px 10px;
  font-size: 12.5px;
  line-height: 1.4;
  border: 1px solid var(--ink-700);
  background: rgba(19, 35, 72, .7);
  color: var(--steel-400);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-ident .copy-btn:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.page-about .ab-ident .copy-btn[data-copied] {
  border-color: var(--mint-400);
  color: var(--mint-400);
  background: rgba(110, 247, 174, .1);
}

@media (min-width: 620px) {
  .page-about .ab-ident__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ---------- 页尾路径 ---------- */
.page-about .ab-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-about .ab-next .next-hop__link {
  padding: 10px 16px;
  border: 2px solid var(--ink-700);
  background: rgba(19, 35, 72, .55);
  color: var(--paper-100);
  font-size: 14.5px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-next .next-hop__link:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(43, 240, 220, .08);
}

.page-about {
  --ab-hair: 1px solid rgba(140, 162, 198, .26);
  --ab-panel-bg: linear-gradient(155deg, rgba(19, 35, 72, .78), rgba(4, 10, 22, .94));
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  margin-top: clamp(16px, 2.6vw, 28px);
  padding: clamp(24px, 4.4vw, 52px) 0 clamp(32px, 5.6vw, 68px);
  border-bottom: 1px solid rgba(43, 240, 220, .2);
  background:
    radial-gradient(115% 85% at 92% 0%, rgba(43, 240, 220, .10), transparent 62%),
    radial-gradient(85% 70% at 0% 100%, rgba(255, 61, 46, .08), transparent 62%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-years {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-year {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 13px;
  border: 1px solid var(--ink-700);
  background: rgba(10, 20, 40, .7);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-year__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-year__tag {
  font-size: 12px;
  color: var(--steel-400);
  letter-spacing: .02em;
}

.page-about .ab-year:hover,
.page-about .ab-year[aria-current="true"] {
  border-color: var(--cyan-400);
  background: rgba(43, 240, 220, .1);
}

.page-about .ab-year:hover .ab-year__tag,
.page-about .ab-year[aria-current="true"] .ab-year__tag {
  color: var(--paper-100);
}

.page-about .ab-hero__main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--paper-100);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 4px 0 0;
  padding: 16px 0 0;
  border-top: var(--ab-hair);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(94px, 1fr));
  gap: 14px 18px;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--steel-400);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .ab-hero__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-card);
  background: var(--ink-850);
}

.page-about .ab-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-about .ab-hero__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 132px minmax(0, 1fr) minmax(0, .86fr);
    gap: 28px 34px;
    align-items: start;
  }

  .page-about .ab-years {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--ink-700);
  }

  .page-about .ab-year {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -2px;
    padding: 11px 0 11px 14px;
    background: transparent;
    white-space: normal;
  }

  .page-about .ab-year[aria-current="true"] {
    border-left-color: var(--cyan-400);
    background: rgba(43, 240, 220, .07);
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(34px, 5.6vw, 72px);
}

.page-about .ab-toc {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  padding: 14px 16px;
}

.page-about .ab-toc .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-about .ab-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .ab-toc .toc__link {
  display: block;
  padding: 7px 11px;
  font-size: 14px;
  color: var(--steel-400);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-toc .toc__link:hover,
.page-about .ab-toc .toc__link[aria-current="true"] {
  color: var(--cyan-400);
  border-left-color: var(--cyan-400);
  background: rgba(43, 240, 220, .07);
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-toc .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
}

/* ---------- 区块通用 ---------- */
.page-about .ab-flow {
  min-width: 0;
}

.page-about .ab-sec {
  padding: clamp(30px, 4.6vw, 54px) 0;
  border-top: 1px solid rgba(43, 240, 220, .16);
  scroll-margin-top: 100px;
}

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

.page-about .ab-sec .section__head {
  max-width: 44em;
}

.page-about .ab-sec .section__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-sec .section__lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-sub {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.3vw, 24px);
  letter-spacing: .01em;
  color: var(--cyan-400);
}

/* ---------- 01 服务 ---------- */
.page-about .ab-serve {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
}

.page-about .ab-serve__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 20px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-serve__item:first-child {
  border-top: var(--ab-hair);
}

.page-about .ab-serve__idx {
  grid-row: span 2;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--blaze-500);
}

.page-about .ab-serve__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 23px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-serve__text {
  margin: 5px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

/* ---------- 02 时间线 ---------- */
.page-about .ab-tl {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  gap: 12px;
}

.page-about .ab-tl__item {
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .85);
  scroll-margin-top: 104px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-tl__item:hover {
  border-color: rgba(43, 240, 220, .6);
}

.page-about .ab-tl__head {
  margin: 0;
}

.page-about .ab-tl__btn {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 15px 16px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__name {
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 21px);
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-tl__cue {
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan-400);
  border-bottom: 2px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-tl__item[data-open="false"] .ab-tl__cue {
  transform: rotate(-45deg);
}

.page-about .ab-tl__panel {
  padding: 0 16px 18px 16px;
  color: var(--steel-400);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .ab-tl__panel p {
  margin: 0;
  max-width: 46em;
}

@media (min-width: 640px) {
  .page-about .ab-tl__btn {
    grid-template-columns: 78px minmax(0, 1fr) 14px;
    padding: 16px 20px;
  }

  .page-about .ab-tl__panel {
    padding: 0 20px 18px 110px;
  }
}

/* ---------- 03 球队库与案例 ---------- */
.page-about .ab-lib {
  margin-top: clamp(22px, 3.2vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-lib__col {
  border-left: 2px solid var(--ink-700);
  padding-left: 16px;
}

.page-about .ab-lib__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-facts {
  margin: 16px 0 0;
}

.page-about .ab-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 9px 0;
  border-bottom: var(--ab-hair);
}

.page-about .ab-facts__row dt {
  font-size: 14px;
  color: var(--steel-400);
}

.page-about .ab-facts__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--amber-400);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-media {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-media .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .ab-media .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 760px) {
  .page-about .ab-lib {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

/* ---------- 04 数据面板 ---------- */
.page-about .ab-panels {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 12px;
}

.page-about .ab-panel {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-panel:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-panel__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber-400);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-panel__num small {
  margin-left: 3px;
  font-size: .46em;
  font-weight: 400;
  color: var(--steel-400);
}

.page-about .ab-panel__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-100);
}

.page-about .ab-panel__note {
  margin-top: 6px;
  padding-top: 9px;
  border-top: 1px dashed rgba(140, 162, 198, .32);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel-400);
  opacity: .62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-panel:hover .ab-panel__note {
  opacity: 1;
  color: var(--cyan-400);
}

.page-about .ab-data {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .ab-data__text {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--steel-400);
}

.page-about .ab-data__figure {
  margin: 0;
  border: 2px solid var(--ink-700);
  background: var(--ink-850);
}

.page-about .ab-data__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-data__figure .figure__cap {
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--steel-400);
}

@media (min-width: 860px) {
  .page-about .ab-data {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: start;
    gap: 32px;
  }
}

/* ---------- 05 设备 ---------- */
.page-about .ab-devices {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-devices__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan-650);
  background: rgba(19, 35, 72, .42);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-devices__row:hover {
  border-left-color: var(--cyan-400);
  background: rgba(19, 35, 72, .68);
}

.page-about .ab-devices__plat {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
}

.page-about .ab-devices__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

@media (min-width: 700px) {
  .page-about .ab-devices__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .ab-devices__desc {
    max-width: 44em;
  }
}

/* ---------- 06 合作与更新 ---------- */
.page-about .ab-cards {
  margin-top: clamp(22px, 3.2vw, 34px);
  padding-bottom: 10px;
}

.page-about .ab-card {
  min-width: 240px;
  max-width: 280px;
  padding: 16px;
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: 4px 4px 0 rgba(19, 35, 72, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-card:hover {
  border-color: var(--cyan-400);
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-card-hover);
}

.page-about .ab-card__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--blaze-500);
}

.page-about .ab-card .card__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-about .ab-card .card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel-400);
}

.page-about .ab-partner__note {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-about .ab-partner__note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 220, .45);
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-partner__note a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 07 品牌识别 ---------- */
.page-about .ab-ident {
  margin-top: clamp(22px, 3.2vw, 34px);
  border: 2px solid var(--ink-700);
  background: var(--ab-panel-bg);
  box-shadow: var(--shadow-card);
}

.page-about .ab-ident__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 18px 18px 16px;
  border-bottom: var(--ab-hair);
}

.page-about .ab-ident__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 38px);
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .ab-ident__sub {
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--cyan-400);
}

.page-about .ab-ident__list {
  margin: 0;
  padding: 4px 18px 14px;
}

.page-about .ab-ident__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 11px 0;
  border-bottom: var(--ab-hair);
}

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

.page-about .ab-ident__row dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel-400);
}

.page-about .ab-ident__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 15.5px;
  color: var(--paper-100);
  word-break: break-word;
}

.page-about .ab-ident__row dd .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-ident .copy-btn {
  padding: 4px 10px;
  font-size: 12.5px;
  line-height: 1.4;
  border: 1px solid var(--ink-700);
  background: rgba(19, 35, 72, .7);
  color: var(--steel-400);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-ident .copy-btn:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.page-about .ab-ident .copy-btn[data-copied] {
  border-color: var(--mint-400);
  color: var(--mint-400);
  background: rgba(110, 247, 174, .1);
}

@media (min-width: 620px) {
  .page-about .ab-ident__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ---------- 页尾路径 ---------- */
.page-about .ab-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-about .ab-next .next-hop__link {
  padding: 10px 16px;
  border: 2px solid var(--ink-700);
  background: rgba(19, 35, 72, .55);
  color: var(--paper-100);
  font-size: 14.5px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-next .next-hop__link:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(43, 240, 220, .08);
}