.page-about {
  --about-rail: 216px;
  --about-soft: var(--paper-soft);
  --about-gap: 56px;
  display: block;
  background: var(--ink-950);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .about-stripe {
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400) 0%, var(--gold-400) 55%, var(--orange-500) 100%);
}

.page-about .breadcrumb {
  padding: 18px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 22px 0 46px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-soft);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 12px;
  height: 3px;
  background: var(--cyan-400);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__frame {
  display: block;
  border: var(--edge) solid var(--line-strong);
  box-shadow: var(--hard);
  background: var(--coal-900);
}

.page-about .about-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-hero__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主栅格 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: 44px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-sec__index {
  flex: none;
  padding: 4px 12px 5px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-950);
  background: var(--gold-400);
  clip-path: polygon(0 0, 100% 0, 100% 66%, 86% 100%, 0 100%);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-sec__body p {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-sec__body p + p {
  margin-top: 14px;
}

.page-about .about-inline-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 三条短句 ---------- */
.page-about .about-brief {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-brief li {
  padding-left: 16px;
  border-left: 3px solid var(--line-strong);
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-brief strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 数据条带 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  padding: 18px 16px 20px;
  background: var(--ink-900);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-400);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 五步流程 ---------- */
.page-about .about-steps {
  margin-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-step {
  border-bottom: 1px solid var(--line);
}

.page-about .about-step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-step summary:hover .about-step__name,
.page-about .about-step summary:focus-visible .about-step__name {
  color: var(--cyan-400);
}

.page-about .about-step__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-400);
  border: 1px solid var(--line-strong);
  padding: 2px 7px;
}

.page-about .about-step__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  transition: color .2s var(--ease);
}

.page-about .about-step__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .about-step[open] .about-step__hint {
  color: var(--cyan-400);
}

.page-about .about-step[open] {
  border-left: 3px solid var(--cyan-400);
  padding-left: 14px;
}

.page-about .about-step__panel {
  padding: 0 2px 18px 44px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 三种状态 ---------- */
.page-about .about-status {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-status__row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--coal-900);
}

.page-about .about-status__row p {
  margin: 0;
  flex: 1 1 240px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-tag {
  flex: none;
  padding: 3px 10px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-950);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 88% 100%, 0 100%);
}

.page-about .about-tag--ok {
  background: var(--cyan-400);
}

.page-about .about-tag--mid {
  background: var(--gold-400);
}

.page-about .about-tag--warn {
  background: var(--orange-500);
}

/* ---------- 通用图形 ---------- */
.page-about .about-figure,
.page-about .about-banner {
  margin: 30px 0 0;
}

.page-about .about-figure__frame,
.page-about .about-banner__frame {
  display: block;
  border: var(--edge) solid var(--line-strong);
  background: var(--coal-900);
}

.page-about .about-figure__frame img,
.page-about .about-banner__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure__frame img {
  aspect-ratio: 4 / 3;
}

.page-about .about-banner__frame img {
  aspect-ratio: 16 / 7;
}

.page-about .about-figure__caption,
.page-about .about-banner__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 团队人数条 ---------- */
.page-about .about-team {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-bar {
  position: relative;
  padding-left: 0;
  border-left: 3px solid transparent;
  transition: border-color .2s var(--ease), padding-left .2s var(--ease);
}

.page-about .about-bar:hover,
.page-about .about-bar:focus-within {
  border-left-color: var(--cyan-400);
  padding-left: 12px;
}

.page-about .about-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-bar__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-bar__num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--gold-400);
}

.page-about .about-bar__track {
  height: 14px;
  background: var(--coal-700);
  border: 1px solid var(--line);
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  transition: filter .2s var(--ease);
}

.page-about .about-bar:hover .about-bar__fill {
  filter: brightness(1.18);
}

.page-about .about-bar--edit .about-bar__fill {
  width: 50%;
  background: linear-gradient(90deg, var(--cyan-400), #1d8d7c);
}

.page-about .about-bar--tech .about-bar__fill {
  width: 33.4%;
  background: linear-gradient(90deg, var(--gold-400), #8a6a1f);
}

.page-about .about-bar--ops .about-bar__fill {
  width: 16.7%;
  background: linear-gradient(90deg, var(--orange-500), #8a2f1c);
}

.page-about .about-bar__role {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 赛季时间带 ---------- */
.page-about .about-seasons {
  display: grid;
  gap: 0;
  margin-top: 28px;
  padding-left: 20px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-season {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .about-season::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--gold-400);
}

.page-about .about-season__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-400);
}

.page-about .about-season__title {
  margin: 6px 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-season p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 发布闸口 ---------- */
.page-about .about-gates {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-gate {
  padding: 20px 18px 22px;
  background: var(--coal-900);
}

.page-about .about-gate__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-400);
}

.page-about .about-gate__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-gate p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-metrics {
  margin-top: 26px;
}

/* ---------- 外部数据三道处理 ---------- */
.page-about .about-flow-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-flow-list li {
  padding: 12px 0 12px 16px;
  border-left: 3px solid var(--line-strong);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-flow-list strong {
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-flow-note {
  margin-top: 18px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-400);
  padding-top: 4px;
}

.page-about .about-next__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-next__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-next__link {
  grid-column: 2;
  justify-self: start;
  margin-top: 12px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-950);
  background: var(--cyan-400);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 92% 100%, 0 100%);
  transition: transform .2s var(--ease), filter .2s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  filter: brightness(1.1);
  transform: translate(-2px, -2px);
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-next__item {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }

  .page-about .about-next__link {
    grid-column: 3;
    margin-top: 0;
    white-space: nowrap;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
    padding: 40px 0 68px;
  }

  .page-about .about-hero__frame img {
    aspect-ratio: 6 / 7;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    padding: 62px 0 40px;
  }

  .page-about .about-rail__title {
    margin: 0 0 14px 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .page-about .about-rail__list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-left: 1px solid var(--line);
  }

  .page-about .about-rail__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-left: -1px;
    padding: 10px 12px 10px 13px;
    border-left: 3px solid transparent;
    font-size: 14px;
    line-height: 1.5;
    color: var(--muted);
    text-decoration: none;
    transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    color: var(--paper);
    border-left-color: var(--cyan-400);
    background: linear-gradient(90deg, rgba(59, 240, 208, .1), transparent);
  }

  .page-about .about-rail__num {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--gold-400);
  }

  .page-about .about-sec {
    padding: 56px 0;
  }

  .page-about .about-seasons {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0;
    padding: 28px 0 0;
    border-left: none;
    border-top: 1px solid var(--line-strong);
  }

  .page-about .about-season {
    padding: 0 16px 0 0;
  }

  .page-about .about-season::before {
    left: 0;
    top: -33px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-step__panel {
    padding-left: 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-step__name,
  .page-about .about-bar,
  .page-about .about-bar__fill,
  .page-about .about-rail__link,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}
<<<END>>>