.page-about {
  --about-rule: 1px solid var(--edge);
  --about-rule-soft: 1px solid var(--grid);
}

.page-about .about-shell {
  padding-top: clamp(20px, 3vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 4vw, 48px);
  max-width: 940px;
}

.page-about .about-hero .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(42px, 9vw, 96px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--grey);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 42px);
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-top: 20px;
  border-top: var(--about-rule);
}

.page-about .about-hero__facts > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__facts dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--grey);
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--neon);
}

/* ---------- 顶部横幅 ---------- */
.page-about .about-banner {
  margin: 0 0 clamp(36px, 6vw, 76px);
}

.page-about .about-banner .figure__frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: saturate(.75) contrast(1.05);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  align-items: start;
}

/* ---------- 左侧目录 ---------- */
.page-about .about-rail {
  position: sticky;
  top: 92px;
  z-index: 6;
  align-self: start;
  background: rgba(7, 11, 22, .94);
  border-bottom: var(--about-rule);
  padding: 10px 0;
  margin: 0 calc(-1 * var(--gap));
  padding-left: var(--gap);
  padding-right: var(--gap);
}

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

.page-about .about-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__nav::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail .toc__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  font-size: 13px;
  color: var(--grey);
  text-decoration: none;
  border: var(--about-rule);
  background: var(--panel);
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .about-rail .toc__link .mono {
  color: var(--gold);
  font-size: 12px;
}

.page-about .about-rail .toc__link:hover,
.page-about .about-rail .toc__link:focus-visible {
  color: var(--paper);
  border-color: var(--neon);
}

.page-about .about-rail .toc__link.is-active {
  color: var(--paper);
  background: var(--brick);
  border-color: var(--brick);
}

.page-about .about-rail .toc__link.is-active .mono {
  color: var(--paper);
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: repeat(12, 1fr);
    gap: 0 clamp(20px, 2.4vw, 36px);
  }

  .page-about .about-rail {
    grid-column: 1 / 3;
    margin: 0;
    padding: 0;
    background: none;
    border-bottom: 0;
    border-left: var(--about-rule);
    top: 104px;
  }

  .page-about .about-rail .toc__head {
    display: block;
    margin: 0 0 16px;
    padding-left: 16px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--grey);
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-rail .toc__link {
    display: flex;
    width: 100%;
    padding: 11px 14px 11px 16px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
    border-radius: 0;
    font-size: 14px;
    transform: translateX(-1px);
  }

  .page-about .about-rail .toc__link:hover {
    background: var(--panel);
    border-left-color: var(--grid);
  }

  .page-about .about-rail .toc__link.is-active {
    background: var(--panel);
    border-left-color: var(--brick);
    color: var(--paper);
  }

  .page-about .about-main {
    grid-column: 4 / 13;
  }
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(36px, 5vw, 72px) 0;
  border-top: var(--about-rule-soft);
  scroll-margin-top: 104px;
}

.page-about .about-section:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-chapter__no {
  font-family: var(--mono);
  font-size: clamp(52px, 9vw, 96px);
  font-weight: 600;
  line-height: .82;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--grid);
  user-select: none;
}

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

.page-about .about-chapter__body .h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-chapter__body p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--grey);
}

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

.page-about .about-chapter__body .h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

@media (min-width: 760px) {
  .page-about .about-chapter {
    grid-template-columns: 84px 1fr;
    gap: 30px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-chapter {
    grid-template-columns: 108px 1fr;
    gap: 40px;
  }
}

/* 引文块 */
.page-about .about-quote {
  margin: 24px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--brick);
  background: var(--panel);
  font-size: clamp(19px, 2.2vw, 26px) !important;
  font-weight: 700;
  line-height: 1.5 !important;
  letter-spacing: -.01em;
  color: var(--paper) !important;
  max-width: none !important;
}

/* ---------- 流程 ---------- */
.page-about .process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  margin: 24px 0 24px;
}

.page-about .process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .process-step {
  padding: 18px 0 18px 0;
  border-top: var(--about-rule-soft);
  display: grid;
  grid-template-columns: 30px 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
}

.page-about .process-step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .process-step__idx {
  grid-row: 1 / 3;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  padding-top: 4px;
}

.page-about .process-step .h3,
.page-about .process-step p {
  grid-column: 2;
}

.page-about .process-step p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--grey);
}

.page-about .process-figure {
  margin: 0;
}

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

@media (min-width: 900px) {
  .page-about .process-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .78fr);
    align-items: start;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .team-tile {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--panel);
  border: var(--about-rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .team-tile:hover,
.page-about .team-tile:focus-visible {
  transform: translateY(-2px);
  border-color: #2c3a55;
  outline: none;
}

.page-about .team-tile:focus-visible {
  box-shadow: 0 0 0 2px var(--neon), var(--shadow-stack);
}

.page-about .team-tile__count {
  margin: 0;
  font-size: 44px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--neon);
}

.page-about .team-tile__unit {
  margin-left: 3px;
  font-size: 14px;
  font-weight: 500;
  color: var(--grey);
}

.page-about .team-tile__name {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-tile__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey);
}

.page-about .team-tile--support {
  border-top: 3px solid var(--brick);
}

.page-about .team-tile--content {
  border-top: 3px solid var(--gold);
}

.page-about .team-tile--tech {
  border-top: 3px solid var(--neon);
}

.page-about .team-tile--product {
  border-top: 3px solid var(--grid);
}

@media (min-width: 700px) {
  .page-about .team-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 14px;
  }

  .page-about .team-tile--content {
    grid-column: span 4;
  }

  .page-about .team-tile--support {
    grid-column: span 8;
  }

  .page-about .team-tile--tech,
  .page-about .team-tile--product {
    grid-column: span 6;
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-section--coverage {
  position: relative;
}

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 26px 0;
  border-top: var(--about-rule-soft);
  border-left: var(--about-rule-soft);
}

.page-about .stat-item {
  padding: 20px 18px;
  border-right: var(--about-rule-soft);
  border-bottom: var(--about-rule-soft);
  background: rgba(15, 21, 38, .55);
}

.page-about .stat-num {
  margin: 0;
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--palestine, var(--neon));
  color: var(--neon);
}

.page-about .stat-num .stat-unit {
  margin-left: 3px;
  font-size: 14px;
  color: var(--grey);
}

.page-about .stat-label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--grey);
}

@media (min-width: 720px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 32px 0;
  }
}

.page-about .coverage-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .coverage-figure .figure__frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: grayscale(.35) brightness(.82);
}

/* ---------- 伙伴 ---------- */
.page-about .partner-grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .partner-card {
  padding: 22px 20px;
  background: var(--panel);
  border: var(--about-rule);
  border-left: 3px solid var(--brick);
  border-radius: var(--radius);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .partner-card:hover {
  transform: translateY(-2px);
  border-left-color: var(--neon);
}

.page-about .partner-card__num {
  margin: 0;
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--gold);
}

.page-about .partner-card__title {
  margin: 12px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .partner-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}

@media (min-width: 700px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--grid);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 1.5px solid var(--gold);
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--gold);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey);
}

@media (min-width: 760px) {
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 84px 1fr;
    gap: 24px;
    padding-left: 34px;
    padding-bottom: 30px;
  }

  .page-about .timeline__year {
    margin-bottom: 0;
    font-size: 17px;
  }
}

/* ---------- 承诺 ---------- */
.page-about .promise-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: var(--about-rule-soft);
}

.page-about .promise-item {
  padding: 20px 0;
  border-bottom: var(--about-rule-soft);
}

.page-about .promise-item__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .promise-item__title::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background: var(--brick);
  transform: translateY(-3px);
}

.page-about .promise-item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

@media (min-width: 760px) {
  .page-about .promise-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 3vw, 40px);
  }
}

/* ---------- 收尾 CTA ---------- */
.page-about .about-cta {
  margin: clamp(40px, 6vw, 80px) 0 clamp(20px, 3vw, 40px);
  padding: clamp(26px, 4vw, 44px);
  background: var(--panel);
  border: var(--about-rule);
  border-top: 3px solid var(--brick);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
}

.page-about .about-cta .eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-cta .h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-cta > p {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--grey);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.page-about .about-cta__aside {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.7;
  color: var(--grey) !important;
}

.page-about .about-cta__aside a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 214, 208, .35);
  transition: border-color 160ms var(--ease);
}

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

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-tile,
  .page-about .partner-card,
  .page-about .timeline__item::before,
  .page-about .about-rail .toc__link {
    transition: none;
  }

  .page-about .team-tile:hover,
  .page-about .partner-card:hover {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --palestine: currentColor;
}