.page-about {
  --ab-gap: clamp(1.5rem, 3.2vw, 3rem);
  --ab-sticky-top: calc(var(--head-h) + 1.5rem);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ============ 首屏 ============ */

.page-about .ab-hero {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(78% 58% at 80% 6%, rgba(228, 87, 46, .16), transparent 62%),
    radial-gradient(60% 48% at 8% 92%, rgba(111, 143, 95, .14), transparent 66%);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3.25rem);
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(2.5rem, 5.5vw, 4.5rem);
}

@media (min-width: 940px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
  }
}

.page-about .ab-hero-eyebrow {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .ab-hero-title {
  font-size: clamp(2.05rem, 5.4vw, 3.55rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: .7rem 0 1.15rem;
  max-width: 14ch;
  color: var(--bone);
}

.page-about .ab-hero-lede {
  max-width: 46ch;
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
}

.page-about .ab-hero-actions {
  margin-bottom: clamp(1.75rem, 3.4vw, 2.5rem);
}

/* 首屏数据带 */
.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem 1.5rem;
  margin: 0;
  padding-top: clamp(1.25rem, 2.6vw, 1.75rem);
  border-top: 1px solid var(--line-soft);
}

@media (min-width: 640px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-fact {
  min-width: 0;
}

.page-about .ab-fact dt {
  font-size: var(--fs-12);
  color: var(--rock);
  letter-spacing: .05em;
}

.page-about .ab-fact dd {
  margin: .35rem 0 0;
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1.05;
  color: var(--bone);
}

.page-about .ab-fact-unit {
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--rock);
}

/* ============ 首屏视觉 ============ */

.page-about .ab-hero-art {
  position: relative;
  min-height: 300px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 82% 12%, rgba(255, 138, 76, .2), transparent 58%),
    linear-gradient(158deg, var(--steel), var(--night) 72%);
}

@media (min-width: 940px) {
  .page-about .ab-hero-art {
    min-height: 460px;
  }
}

.page-about .ab-art-grid {
  position: absolute;
  inset: -18% -10%;
  background-image:
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 58px),
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 58px);
  transform: perspective(620px) rotateX(50deg) rotateZ(-16deg);
  opacity: .5;
}

.page-about .ab-art-beam {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .ab-art-beam--a {
  background: linear-gradient(112deg, transparent 34%, rgba(228, 87, 46, .3) 49%, transparent 63%);
}

.page-about .ab-art-beam--b {
  background: linear-gradient(112deg, transparent 54%, rgba(76, 224, 165, .22) 68%, transparent 82%);
}

.page-about .ab-art-node {
  position: absolute;
  left: var(--nx);
  top: var(--ny);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 6px rgba(228, 87, 46, .16);
  transform: translate(-50%, -50%);
}

.page-about .ab-art-node--neon {
  background: var(--neon);
  box-shadow: 0 0 0 6px rgba(76, 224, 165, .18);
  animation: ab-pulse 2s var(--ease) infinite;
}

@keyframes ab-pulse {
  0%, 100% { box-shadow: 0 0 0 5px rgba(76, 224, 165, .2); }
  50% { box-shadow: 0 0 0 13px rgba(76, 224, 165, 0); }
}

.page-about .ab-art-chip {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: .6rem .85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(22, 35, 58, .88);
}

.page-about .ab-art-chip .num {
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1;
  color: var(--bone);
}

.page-about .ab-art-chip-key {
  font-size: var(--fs-12);
  color: var(--rock);
  white-space: nowrap;
}

.page-about .ab-art-chip--a {
  left: 8%;
  bottom: 11%;
}

.page-about .ab-art-chip--b {
  right: 7%;
  top: 11%;
  border-color: rgba(76, 224, 165, .4);
}

.page-about .ab-art-chip--b .num {
  color: var(--neon);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-art-node--neon {
    animation: none;
  }
}

/* ============ 正文栅格 + 章节锚点 ============ */

.page-about .ab-layout {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.75rem);
  grid-template-areas:
    "toc"
    "main";
}

.page-about .ab-toc {
  grid-area: toc;
  padding-block: clamp(1.5rem, 3vw, 2.25rem) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-main {
  grid-area: main;
  min-width: 0;
}

.page-about .ab-toc-title {
  margin: 0 0 .75rem;
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--rock);
}

.page-about .ab-toc .toc-list {
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scrollbar-width: none;
}

.page-about .ab-toc .toc-list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-toc .toc-list a {
  flex: 0 0 auto;
  padding: .32rem .7rem;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  font-size: var(--fs-12);
  color: var(--rock);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .ab-toc .toc-list a:hover,
.page-about .ab-toc .toc-list a:focus-visible {
  color: var(--bone);
  border-color: var(--line);
}

.page-about .ab-toc .toc-list a[aria-current="true"] {
  color: var(--night);
  background: var(--clay);
  border-color: var(--clay);
  font-weight: 600;
}

@media (min-width: 1060px) {
  .page-about .ab-layout {
    grid-template-columns: minmax(0, 1fr) 186px;
    grid-template-areas: "main toc";
    align-items: start;
  }

  .page-about .ab-toc {
    position: sticky;
    top: var(--ab-sticky-top);
    padding-block: clamp(3rem, 6vw, 5rem) 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
    padding-left: 1.1rem;
  }

  .page-about .ab-toc .toc-list {
    flex-direction: column;
    gap: .1rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-toc .toc-list a {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: .42rem 0 .42rem .6rem;
    margin-left: -1.1rem;
    white-space: normal;
    font-size: var(--fs-14);
  }

  .page-about .ab-toc .toc-list a[aria-current="true"] {
    background: transparent;
    color: var(--clay);
    border-left-color: var(--clay);
  }
}

/* ============ 01 赛况覆盖 ============ */

.page-about .ab-scope-grid {
  display: grid;
  gap: clamp(1.75rem, 3.4vw, 2.75rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 900px) {
  .page-about .ab-scope-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: start;
  }
}

.page-about .ab-scope-text p {
  margin-bottom: 1.15rem;
}

.page-about .ab-scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-about .ab-scope-item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "k name"
    "k say";
  gap: .15rem .85rem;
  align-items: baseline;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-scope-k {
  grid-area: k;
  align-self: start;
  font-size: var(--fs-12);
  color: var(--moss);
  letter-spacing: .08em;
}

.page-about .ab-scope-name {
  grid-area: name;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--bone);
  letter-spacing: -.01em;
}

.page-about .ab-scope-say {
  grid-area: say;
  font-size: var(--fs-14);
  color: var(--rock);
}

/* ============ 02 版本时间轴 ============ */

.page-about .ab-timeline-media {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 clamp(2rem, 4vw, 3rem);
}

.page-about .ab-tl {
  position: relative;
  display: grid;
  gap: .35rem;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 1.6rem;
  bottom: 1.6rem;
  width: 2px;
  background: linear-gradient(180deg, var(--clay), var(--moss) 48%, var(--neon));
  opacity: .55;
}

.page-about .ab-tl-item {
  position: relative;
  padding-left: 2.25rem;
  border-radius: var(--radius-sm);
  transition: background-color .2s var(--ease);
}

.page-about .ab-tl-item:hover {
  background: rgba(22, 35, 58, .62);
}

.page-about .ab-tl-title {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .ab-tl-head {
  position: relative;
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: .5rem .75rem;
  width: 100%;
  padding: .95rem .9rem .95rem 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

.page-about .ab-tl-node {
  position: absolute;
  left: -2.25rem;
  top: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--moss);
  transform: translateY(-50%);
}

.page-about .ab-tl-item--current .ab-tl-node--now {
  border-color: var(--clay);
  box-shadow: 0 0 0 5px rgba(228, 87, 46, .16);
}

.page-about .ab-tl-year {
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--bone);
  line-height: 1;
}

.page-about .ab-tl-gen {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--clay);
  white-space: nowrap;
}

.page-about .ab-tl-name {
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--bone);
  line-height: 1.4;
}

.page-about .ab-tl-body {
  padding: 0 .9rem 1.1rem 0;
}

.page-about .ab-tl-body p {
  margin: 0;
  max-width: 60ch;
  color: var(--rock);
  line-height: 1.7;
}

@media (max-width: 620px) {
  .page-about .ab-tl-head {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "year gen"
      "name name";
    row-gap: .35rem;
  }

  .page-about .ab-tl-year { grid-area: year; }
  .page-about .ab-tl-gen { grid-area: gen; }
  .page-about .ab-tl-name { grid-area: name; }
}

/* ============ 03 内容产出 ============ */

.page-about .ab-produce-grid {
  display: grid;
  gap: clamp(1.75rem, 3.4vw, 2.75rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 900px) {
  .page-about .ab-produce-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: start;
  }
}

.page-about .ab-produce-text p {
  margin-bottom: 1.15rem;
}

.page-about .ab-produce-media {
  margin: 0;
}

.page-about .ab-produce-figures {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.75rem, 3.4vw, 2.5rem);
  padding-top: clamp(1.25rem, 2.6vw, 1.75rem);
  border-top: 1px solid var(--line-soft);
}

@media (min-width: 700px) {
  .page-about .ab-produce-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

.page-about .ab-produce-stat {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.page-about .ab-produce-stat .stat-value {
  font-size: var(--fs-28);
  font-weight: 800;
  color: var(--neon);
  line-height: 1;
}

.page-about .ab-produce-stat .stat-label {
  font-size: var(--fs-14);
  color: var(--rock);
  line-height: 1.5;
}

/* ============ 04 团队 ============ */

.page-about .ab-team-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 860px) {
  .page-about .ab-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 1.25rem;
  }

  .page-about .ab-team-card:nth-child(2) {
    margin-top: 2.5rem;
  }

  .page-about .ab-team-card:nth-child(3) {
    margin-top: 1rem;
  }
}

.page-about .ab-team-card {
  padding: clamp(1.25rem, 2.4vw, 1.75rem);
  border-top: 2px solid var(--clay);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .ab-team-card:nth-child(2) {
  border-top-color: var(--neon);
}

.page-about .ab-team-card:nth-child(3) {
  border-top-color: var(--moss);
}

.page-about .ab-team-card:hover {
  transform: translateY(-3px);
}

.page-about .ab-team-count {
  margin: 0;
  font-size: var(--fs-40);
  font-weight: 800;
  line-height: 1;
  color: var(--bone);
}

.page-about .ab-team-name {
  margin: .7rem 0 .35rem;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--bone);
}

.page-about .ab-team-line {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--rock);
  line-height: 1.6;
}

.page-about .ab-team-detail {
  margin: .85rem 0 0;
  max-height: 12rem;
  opacity: 1;
  overflow: hidden;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--bone);
  border-top: 1px solid var(--line-soft);
  padding-top: .75rem;
  transition: max-height .28s var(--ease), opacity .2s var(--ease), padding-top .2s var(--ease);
}

@media (hover: hover) and (min-width: 860px) {
  .page-about .ab-team-detail {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    border-top-color: transparent;
  }

  .page-about .ab-team-card:hover .ab-team-detail,
  .page-about .ab-team-card:focus-within .ab-team-detail {
    max-height: 12rem;
    opacity: 1;
    padding-top: .75rem;
    border-top-color: var(--line-soft);
  }
}

.page-about .ab-team-media {
  margin: clamp(2rem, 4vw, 3rem) 0 0;
}

/* ============ 05 标签与专题 ============ */

.page-about .ab-cloud {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  gap: .55rem;
}

.page-about .ab-topic {
  margin-top: clamp(2rem, 4vw, 3rem);
  max-width: 62ch;
}

.page-about .ab-topic-title {
  margin: 0 0 .6rem;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--bone);
}

.page-about .ab-topic-text {
  margin: 0;
  color: var(--rock);
  line-height: 1.75;
}

.page-about .ab-topic-stats {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 3vw, 2rem);
  padding-top: clamp(1.25rem, 2.6vw, 1.75rem);
  border-top: 1px solid var(--line-soft);
}

@media (min-width: 640px) {
  .page-about .ab-topic-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

.page-about .ab-topic-stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.page-about .ab-topic-num {
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1;
  color: var(--clay);
}

.page-about .ab-topic-label {
  font-size: var(--fs-14);
  color: var(--rock);
}

/* ============ 06 合作生态 ============ */

.page-about .ab-partners-grid {
  display: grid;
  gap: clamp(1.75rem, 3.4vw, 3rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 880px) {
  .page-about .ab-partners-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }
}

.page-about .ab-partners-text p {
  margin-bottom: 1.15rem;
}

.page-about .ab-partner-figures {
  display: grid;
  gap: 1.25rem;
}

.page-about .ab-partner-stat {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: clamp(1rem, 2vw, 1.35rem);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--slate);
}

.page-about .ab-partner-stat .stat-value {
  font-size: var(--fs-40);
  font-weight: 800;
  line-height: 1;
  color: var(--neon);
}

.page-about .ab-partner-stat .stat-label {
  font-size: var(--fs-14);
  color: var(--rock);
  line-height: 1.5;
}

/* ============ 07 反馈响应 ============ */

.page-about .ab-support-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 780px) {
  .page-about .ab-support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

.page-about .ab-support-card {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  padding: clamp(1.25rem, 2.4vw, 1.75rem);
}

.page-about .ab-support-title {
  margin: 0;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--bone);
}

.page-about .ab-support-text {
  margin: 0;
  flex: 1 1 auto;
  color: var(--rock);
  line-height: 1.75;
}

.page-about .ab-support-card .btn {
  align-self: flex-start;
}

.page-about .ab-cta {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-cta-lead {
  margin: 0 0 1rem;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--bone);
  letter-spacing: -.01em;
}

@media (max-width: 520px) {
  .page-about .ab-hero-actions .btn,
  .page-about .ab-cta .btn {
    width: 100%;
  }

  .page-about .ab-tl-head {
    padding-right: .25rem;
  }

  .page-about .ab-tl-body {
    padding-right: .25rem;
  }
}
<<<END>>>

.page-about {
  --nx: inherit;
  --ny: inherit;
}