.page-about {
  background: var(--ink-900);
  color: var(--white);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb__link {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .breadcrumb__sep {
  color: var(--grid);
}

.page-about .breadcrumb__current {
  color: var(--neon-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-top: var(--edge) solid var(--grid);
  border-bottom: var(--edge) solid var(--grid);
  background:
    linear-gradient(115deg, rgba(122, 31, 61, 0.74) 0%, rgba(122, 31, 61, 0.18) 42%, rgba(7, 11, 10, 0) 68%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.42;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 60%;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 42px;
  padding-bottom: 54px;
}

.page-about .about-hero .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--neon);
}

.page-about .about-hero__title {
  max-width: 22ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.12;
  letter-spacing: 0.035em;
}

.page-about .about-hero__hl {
  color: var(--neon);
  box-shadow: inset 0 -0.24em 0 rgba(56, 240, 140, 0.16);
}

.page-about .about-hero__lede {
  max-width: 48ch;
  margin: 20px 0 0;
  color: var(--text-mid);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: var(--edge) solid var(--grid);
  background: rgba(11, 58, 46, 0.5);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 双列骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 34px;
  padding-bottom: 64px;
}

.page-about .about-index__heading {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-about .about-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 10px 10px 10px 12px;
  border-left: 2px solid var(--grid);
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-index__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--neon);
  border-left-color: var(--neon);
  background: rgba(56, 240, 140, 0.07);
}

.page-about .about-index__link:hover .num,
.page-about .about-index__link:focus-visible .num {
  color: var(--neon-soft);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-top: 32px;
  border-top: var(--edge) solid var(--grid);
  scroll-margin-top: 96px;
}

.page-about .about-section:first-child {
  padding-top: 0;
  border-top: none;
}

.page-about .about-section + .about-section {
  margin-top: 40px;
}

.page-about .about-section .eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.page-about .about-section .section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 33px);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-lead {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 28px;
  border: var(--edge) solid var(--grid);
  background: var(--ink-800);
}

.page-about .about-figure .figure__img {
  overflow: hidden;
}

.page-about .about-figure .figure__img img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure .figure__caption {
  padding: 12px 16px;
  border-top: var(--edge) solid var(--grid);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--blue) 46%, var(--wine) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 30px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 5px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border: 3px solid var(--neon);
  border-radius: 50%;
  background: var(--ink-900);
  transition: background 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .timeline__item:target::before {
  background: var(--neon);
  box-shadow: 0 0 0 5px rgba(56, 240, 140, 0.18);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .timeline__text {
  max-width: 60ch;
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-about .timeline__summary {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--blue);
  background: rgba(63, 169, 255, 0.07);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* ---------- 小结条 ---------- */
.page-about .about-note {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  align-items: baseline;
  margin: 26px 0 0;
  padding: 14px 18px;
  border: var(--edge) solid var(--grid);
  border-left: 4px solid var(--orange);
  background: linear-gradient(90deg, rgba(255, 122, 47, 0.1), rgba(255, 122, 47, 0));
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--text-mid);
}

.page-about .about-note__k {
  padding: 3px 8px;
  background: var(--orange);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .about-note__link {
  color: var(--neon-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 255, 211, 0.45);
}

.page-about .about-note__link:hover,
.page-about .about-note__link:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 团队角色切换 ---------- */
.page-about .role-switch {
  position: relative;
  margin-bottom: 26px;
}

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

.page-about .role-switch__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .role-switch__tab {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 10px 16px;
  border: var(--edge) solid var(--grid);
  background: var(--ink-800);
  font-size: 14px;
  color: var(--text-mid);
  cursor: pointer;
  transition: color 200ms var(--ease), background 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .role-switch__tab .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .role-switch__tab:hover {
  border-color: var(--neon-soft);
  color: var(--white);
}

.page-about #role-data:checked ~ .role-switch__tabs .role-switch__tab[for="role-data"],
.page-about #role-tech:checked ~ .role-switch__tabs .role-switch__tab[for="role-tech"],
.page-about #role-support:checked ~ .role-switch__tabs .role-switch__tab[for="role-support"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink-900);
  box-shadow: 4px 4px 0 rgba(56, 240, 140, 0.2);
}

.page-about #role-data:checked ~ .role-switch__tabs .role-switch__tab[for="role-data"] .num,
.page-about #role-tech:checked ~ .role-switch__tabs .role-switch__tab[for="role-tech"] .num,
.page-about #role-support:checked ~ .role-switch__tabs .role-switch__tab[for="role-support"] .num {
  color: rgba(7, 11, 10, 0.7);
}

.page-about #role-data:focus-visible ~ .role-switch__tabs .role-switch__tab[for="role-data"],
.page-about #role-tech:focus-visible ~ .role-switch__tabs .role-switch__tab[for="role-tech"],
.page-about #role-support:focus-visible ~ .role-switch__tabs .role-switch__tab[for="role-support"] {
  outline: 2px solid var(--neon-soft);
  outline-offset: 3px;
}

.page-about .role-switch__panels {
  position: relative;
}

.page-about .role-panel {
  display: none;
  padding: 22px 20px;
  border: var(--edge) solid var(--grid);
  border-top: 4px solid var(--neon);
  background: linear-gradient(150deg, rgba(11, 58, 46, 0.92), rgba(5, 35, 28, 0.96));
}

.page-about #role-data:checked ~ .role-switch__panels .role-panel--data,
.page-about #role-tech:checked ~ .role-switch__panels .role-panel--tech,
.page-about #role-support:checked ~ .role-switch__panels .role-panel--support {
  display: block;
  animation: about-role-in 280ms var(--ease);
}

@keyframes about-role-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-about .role-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .role-panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .role-panel__count {
  padding: 3px 8px;
  border: 1px solid rgba(56, 240, 140, 0.4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-about .role-panel__text {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-about .role-panel__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .role-panel__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-about .role-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--blue);
}

/* ---------- 流程步骤 ---------- */
.page-about .flow {
  display: grid;
  gap: 12px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  counter-reset: about-flow;
}

.page-about .flow__item {
  position: relative;
  counter-increment: about-flow;
  padding: 18px 18px 18px 66px;
  border: var(--edge) solid var(--grid);
  background: var(--ink-800);
}

.page-about .flow__item::before {
  content: counter(about-flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: var(--edge) solid var(--grid);
  background: rgba(56, 240, 140, 0.07);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-about .flow__title {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mid);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-card {
  padding: 20px;
  border: var(--edge) solid rgba(169, 255, 211, 0.22);
  background: linear-gradient(160deg, rgba(59, 42, 107, 0.62), rgba(5, 35, 28, 0.92));
}

.page-about .partner-card__label {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  background: var(--neon-soft);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-about .partner-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 长期投入 ---------- */
.page-about .invest-list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--edge) solid var(--grid);
}

.page-about .invest-item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: var(--edge) solid var(--grid);
}

.page-about .invest-item__head {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--neon-soft);
}

.page-about .invest-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 下一步 ---------- */
.page-about .next-grid {
  display: grid;
  gap: 14px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: var(--edge) solid var(--grid);
  background: var(--ink-800);
  color: inherit;
  text-decoration: none;
  transition: border-color 220ms var(--ease), background 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--neon);
  background: var(--ink-700);
  box-shadow: 6px 6px 0 rgba(56, 240, 140, 0.16);
}

.page-about .next-card__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--neon);
}

.page-about .next-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .next-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-about .next-card__go {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: var(--edge) solid var(--grid);
    border-left: var(--edge) solid var(--grid);
  }

  .page-about .about-fact {
    border-top: none;
    border-left: none;
  }
}

@media (min-width: 760px) {
  .page-about .partner-list {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }

  .page-about .partner-list > :nth-child(2) {
    margin-top: 28px;
  }

  .page-about .partner-list > :nth-child(3) {
    grid-column: 1 / -1;
  }

  .page-about .invest-item {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 6px 26px;
    align-items: start;
  }

  .page-about .invest-item__head {
    text-align: right;
  }

  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .next-grid > :nth-child(2) {
    margin-top: 24px;
  }

  .page-about .next-grid > :nth-child(3) {
    margin-top: 48px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__inner {
    padding-top: 58px;
    padding-bottom: 72px;
  }

  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 52px;
    padding-top: 52px;
    padding-bottom: 88px;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .timeline {
    padding-left: 34px;
  }

  .page-about .timeline::before {
    left: 11px;
  }

  .page-about .timeline__item::before {
    left: -29px;
  }

  .page-about .about-figure--team {
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about #role-data:checked ~ .role-switch__panels .role-panel--data,
  .page-about #role-tech:checked ~ .role-switch__panels .role-panel--tech,
  .page-about #role-support:checked ~ .role-switch__panels .role-panel--support {
    animation: none;
  }

  .page-about .breadcrumb__link,
  .page-about .about-index__link,
  .page-about .role-switch__tab,
  .page-about .next-card,
  .page-about .timeline__item::before {
    transition: none;
  }
}
<<<END>>>