.page-about {
  --ab-gap: 1.25rem;
  --ab-block: 3.5rem;
}

@media (min-width: 768px) {
  .page-about {
    --ab-block: 6rem;
  }
}

.page-about .breadcrumb {
  padding-top: 1.75rem;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero__inner {
  display: grid;
  gap: 2rem;
  padding-block: 2rem 3.5rem;
}

.page-about .about-hero__kicker {
  margin: 0 0 1rem;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-hero__title {
  margin: 0 0 1.5rem;
  font-size: clamp(2.125rem, 8.5vw, 3.75rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .about-hero__lead {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 34em;
}

.page-about .about-hero__tags {
  margin-top: 1.75rem;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-2);
  padding: 6px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 4rem;
    align-items: start;
    padding-block: 3rem 5.5rem;
  }

  .page-about .about-hero__figure {
    margin-top: 3.5rem;
  }
}

/* ---------- 通用区块 ---------- */

.page-about .about-section {
  padding-block: var(--ab-block);
  border-top: 1px solid var(--line);
}

.page-about .section-head {
  margin-bottom: 2.25rem;
}

.page-about .section-head__title {
  margin: 0.5rem 0 0.75rem;
  font-size: clamp(1.5rem, 4.5vw, 2.25rem);
  line-height: 1.25;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .section-head__desc {
  margin: 0;
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 起点 ---------- */

.page-about .about-start {
  display: grid;
  gap: 2rem;
}

.page-about .about-start__body .prose p {
  margin: 0 0 1.125rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-start__body .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-start__note {
  color: var(--bg);
  align-self: start;
}

.page-about .about-start__list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-start__list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.9375rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(7, 11, 20, 0.14);
}

.page-about .about-start__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-start__list .mono {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--bg);
  opacity: 0.6;
}

@media (min-width: 900px) {
  .page-about .about-start {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-crew {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-crew__card {
  background: var(--bg-2);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-crew__card:hover {
  background: #12213d;
  box-shadow: inset 3px 0 0 0 var(--green);
}

.page-about .about-crew__num {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--green);
}

.page-about .about-crew__role {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
  flex: 1;
}

.page-about .about-crew__meta {
  margin: 0;
  padding-top: 0.875rem;
  border-top: 1px dashed var(--line);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .about-crew__figure {
  margin-top: 2.5rem;
}

@media (min-width: 900px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-crew__card:nth-child(2) {
    margin-top: 2rem;
  }
}

/* ---------- 四条主线 ---------- */

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-lines__row {
  background: var(--bg);
  padding: 1.5rem 1.25rem;
  display: grid;
  gap: 0.5rem;
  align-items: start;
  transition: background-color 200ms var(--ease);
}

.page-about .about-lines__row:hover {
  background: var(--bg-2);
}

.page-about .about-lines__idx {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--dim);
}

.page-about .about-lines__name {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-lines__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-lines__row {
    grid-template-columns: 3.5rem minmax(0, 11rem) minmax(0, 1fr) auto;
    gap: 1.75rem;
    align-items: baseline;
    padding: 1.75rem 1.5rem;
  }
}

/* ---------- 联赛覆盖 ---------- */

.page-about .about-leagues {
  display: grid;
  gap: 1rem;
}

.page-about .about-leagues__item {
  padding: 1.5rem 1.25rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-left-width: 3px;
  transition: border-color 200ms var(--ease);
}

.page-about .about-leagues__item--green {
  border-left-color: var(--green);
}

.page-about .about-leagues__item--violet {
  border-left-color: var(--violet);
}

.page-about .about-leagues__item--teal {
  border-left-color: var(--teal);
}

.page-about .about-leagues__item--orange {
  border-left-color: var(--orange);
}

.page-about .about-leagues__name {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.page-about .about-leagues__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-leagues__note {
  margin-top: 2rem;
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(37, 229, 208, 0.07), transparent 62%);
}

.page-about .about-leagues__note p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink);
  max-width: 44em;
}

@media (min-width: 640px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-leagues__item:nth-child(2) {
    margin-top: 1.5rem;
  }

  .page-about .about-leagues__item:nth-child(4) {
    margin-top: 1.5rem;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__index {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline__jump {
  flex: 0 0 auto;
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-timeline__jump:hover,
.page-about .about-timeline__jump:focus-visible {
  color: var(--bg);
  background: var(--green);
  border-color: var(--green);
  outline: none;
}

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

.page-about .about-timeline__node {
  padding: 1.75rem 0 1.75rem 1.5rem;
  border-left: 2px solid var(--line);
  transition: border-color 240ms var(--ease), background-color 240ms var(--ease);
}

.page-about .about-timeline__node:target {
  border-left-color: var(--green);
  background: linear-gradient(90deg, rgba(59, 255, 158, 0.09), transparent 68%);
}

.page-about .about-timeline__node:target .about-timeline__year {
  color: var(--green);
}

.page-about .about-timeline__year {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 6vw, 2.75rem);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--dim);
  transition: color 240ms var(--ease);
}

.page-about .about-timeline__name {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 42em;
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-timeline__index {
    position: sticky;
    top: calc(var(--top-h) + 2rem);
    flex-direction: column;
    gap: 1rem;
    overflow: visible;
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: 0;
    align-self: start;
  }

  .page-about .about-timeline__jump {
    padding: 0.5rem 0;
    border: 0;
    border-left: 2px solid var(--line);
    padding-left: 0.85rem;
    font-size: 0.9375rem;
    background: transparent;
  }

  .page-about .about-timeline__jump:hover,
  .page-about .about-timeline__jump:focus-visible {
    background: transparent;
    color: var(--green);
    border-left-color: var(--green);
  }

  .page-about .about-timeline__node {
    padding: 2rem 0 2rem 2rem;
  }

  .page-about .about-timeline__node:nth-child(even) {
    padding-left: 3.5rem;
  }
}

/* ---------- 合作与荣誉 ---------- */

.page-about .about-open {
  display: grid;
  gap: 2rem;
}

.page-about .about-open__text p {
  margin: 0 0 1.125rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink);
  max-width: 42em;
}

.page-about .about-open__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.page-about .about-open__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-2);
  padding: 6px;
}

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

@media (min-width: 900px) {
  .page-about .about-open {
    grid-template-columns: minmax(0, 1fr) minmax(0, 6fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-about .about-open__figure {
    margin-top: 1.5rem;
  }
}

/* ---------- 结尾引导 ---------- */

.page-about .about-section--cta {
  border-top: 1px solid var(--line);
}

.page-about .about-cta {
  display: grid;
  gap: 2rem;
  padding: 2.25rem 1.75rem;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(59, 255, 158, 0.08), rgba(142, 123, 255, 0.06) 55%, transparent);
}

.page-about .about-cta__mark {
  margin: 0 0 0.875rem;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--green);
}

.page-about .about-cta__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 40em;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-content: start;
}

@media (min-width: 900px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 3rem;
    align-items: center;
    padding: 3rem 2.5rem;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

/* ---------- 图片与文本通用保护 ---------- */

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

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>