.page-about {
  --about-cut: 24px;
  --about-gap: 22px;
  --about-rail-w: 210px;
  background:
    radial-gradient(120% 70% at 82% -10%, rgba(46, 74, 94, .55) 0%, rgba(8, 24, 38, 0) 62%),
    linear-gradient(180deg, var(--ink-900) 0%, #0a1e2e 46%, var(--ink-900) 100%);
  color: var(--paper-100);
  font-family: var(--font-body);
  overflow-x: clip;
  padding-bottom: 8px;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-offset) + 18px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-block: calc(var(--header-offset) + 12px) 4px;
}

.page-about .about-crumb .breadcrumb__link,
.page-about .about-crumb .breadcrumb__list {
  color: var(--gray-400);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: 20px 56px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: end;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 11px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--volt-400);
  background: rgba(182, 242, 58, .09);
  border: 1px solid rgba(182, 242, 58, .34);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.6vw, 74px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--paper-100);
}

.page-about .about-hero__text {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: #cbd5de;
}

.page-about .about-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chip {
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--volt-100);
  background: rgba(16, 43, 63, .9);
  border: 1px solid var(--edge);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.78) contrast(1.08) brightness(.92);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 12px 12px auto;
  width: 46px;
  height: 3px;
  background: var(--ember-500);
  transform: rotate(-45deg);
  transform-origin: right center;
}

.page-about .about-hero__figcap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--gray-400);
}

/* ---------- 3 / 9 主体 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-block: 8px 72px;
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--steel-500) transparent;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 12px;
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--gray-400);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--edge);
  border-radius: var(--radius-pill);
  background: rgba(16, 43, 63, .55);
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--flare-600);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper-100);
  border-color: rgba(255, 122, 51, .6);
  background: rgba(255, 122, 51, .12);
}

/* ---------- 叙事区块 ---------- */
.page-about .about-main {
  min-width: 0;
}

.page-about .about-sec {
  padding-block: 4px 46px;
}

.page-about .about-sec__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -.005em;
  color: var(--paper-100);
}

.page-about .about-sec__title::before {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-bottom: 14px;
  background: var(--ember-500);
}

.page-about .about-sec__text {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: #c6d1db;
}

.page-about .about-sec__text--lead {
  color: var(--paper-100);
  font-size: 16.5px;
}

/* ---------- 切角引言牌 ---------- */
.page-about .about-quote {
  position: relative;
  margin: 0 0 46px;
  padding: 26px 24px 22px;
  background: var(--paper-100);
  color: var(--ink-900);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-quote--dark {
  background: var(--ink-700);
  color: var(--paper-100);
  box-shadow: inset 0 0 0 1px var(--edge);
}

.page-about .about-quote__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--paper-100);
  background: var(--flare-600);
}

.page-about .about-quote--dark .about-quote__tag {
  color: var(--ink-950);
  background: var(--volt-400);
}

.page-about .about-quote__text {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.6vw, 29px);
  line-height: 1.4;
  letter-spacing: -.005em;
}

.page-about .about-quote__copy {
  display: inline-block;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: currentColor;
  background: transparent;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  opacity: .62;
  cursor: pointer;
  transition: opacity .18s var(--ease);
}

.page-about .about-quote__copy:hover,
.page-about .about-quote__copy:focus-visible {
  opacity: 1;
}

/* ---------- 三条主线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-line {
  position: relative;
  padding: 20px 18px 18px 22px;
  background: linear-gradient(135deg, rgba(16, 43, 63, .95) 0%, rgba(8, 24, 38, .82) 100%);
  border-left: 2px solid var(--steel-500);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-line:nth-child(2) {
  border-left-color: var(--ember-500);
}

.page-about .about-line:nth-child(3) {
  border-left-color: var(--volt-400);
}

.page-about .about-line__no {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ember-500);
}

.page-about .about-line__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  color: var(--paper-100);
}

.page-about .about-line__text {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: #bfcbd6;
}

.page-about .about-line__meta {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--volt-400);
  padding-top: 8px;
  border-top: 1px dashed var(--edge);
}

/* ---------- 发展路径 ---------- */
.page-about .about-path {
  position: relative;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-path::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--flare-600) 0%, var(--steel-500) 58%, rgba(46, 74, 94, 0) 100%);
}

.page-about .about-path__item {
  position: relative;
  padding: 0 0 28px 28px;
}

.page-about .about-path__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--flare-600);
  background: var(--ink-900);
  transition: background .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-path__item:hover::before {
  background: var(--flare-600);
  transform: scale(1.25);
}

.page-about .about-path__year {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--flare-600);
}

.page-about .about-path__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.35;
  color: var(--paper-100);
}

.page-about .about-path__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: #b9c5d0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: 8px 50px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(.8) brightness(.95);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .about-team__roles {
  display: grid;
  grid-template-columns: 1.1fr 1fr .9fr;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__role {
  padding: 12px 10px;
  background: rgba(16, 43, 63, .7);
  border-top: 2px solid var(--steel-500);
}

.page-about .about-team__role:nth-child(2) {
  border-top-color: var(--ember-500);
}

.page-about .about-team__role:nth-child(3) {
  border-top-color: var(--volt-400);
}

.page-about .about-team__num {
  display: block;
  font-size: 24px;
  line-height: 1.1;
  color: var(--paper-100);
}

.page-about .about-team__role-name {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray-400);
}

/* ---------- 规模看板 ---------- */
.page-about .about-scale {
  padding-block: 4px 52px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  position: relative;
  padding: 16px 14px 14px;
  background: rgba(4, 13, 20, .62);
  border: 1px solid var(--edge-soft);
  outline: none;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-visible {
  border-color: rgba(182, 242, 58, .5);
  background: rgba(16, 43, 63, .72);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--volt-400);
}

.page-about .about-stat__plus,
.page-about .about-stat__unit {
  font-size: .52em;
  margin-left: 3px;
  color: var(--gray-400);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--paper-100);
}

.page-about .about-stat__note {
  display: block;
  margin-top: 8px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--gray-400);
  transition: max-height .3s var(--ease), opacity .24s var(--ease);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: 4px 52px;
}

.page-about .about-partners__panel {
  padding: 28px 22px 26px;
  background:
    repeating-linear-gradient(-45deg, rgba(4, 13, 20, .05) 0 2px, transparent 2px 7px),
    var(--paper-100);
  color: var(--ink-900);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 0 100%);
}

.page-about .about-sec__title--dark {
  color: var(--ink-900);
}

.page-about .about-sec__title--dark::before {
  background: var(--flare-600);
}

.page-about .about-partners__text {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: #2b3a45;
}

.page-about .about-partners__figures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__figure {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-partners__num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--flare-600);
}

.page-about .about-partners__unit {
  font-size: .5em;
  margin-left: 2px;
}

.page-about .about-partners__cap {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: #4a5a66;
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 落脚地 ---------- */
.page-about .about-home {
  padding-block: 4px 20px;
}

.page-about .about-home__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}

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

.page-about .about-home__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.82) brightness(.9);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-home__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__chips {
    gap: 10px;
  }

  .page-about .about-lines {
    gap: 16px;
  }

  .page-about .about-line {
    padding: 24px 26px 22px 26px;
  }

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

  .page-about .about-line:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-block: 26px 68px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
  }

  .page-about .about-body {
    grid-template-columns: 3fr 9fr;
    gap: 48px;
    padding-block: 14px 96px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-offset) + 18px);
    align-self: start;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--edge);
  }

  .page-about .about-rail__link {
    position: relative;
    display: flex;
    padding: 7px 0 7px 14px;
    border: 0;
    border-radius: 0;
    background: transparent;
    font-size: 13px;
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 50%;
    width: 6px;
    height: 6px;
    margin-top: -3px;
    border-radius: 50%;
    background: var(--steel-500);
    transition: background .18s var(--ease), transform .18s var(--ease);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: transparent;
  }

  .page-about .about-rail__link:hover::before,
  .page-about .about-rail__link:focus-visible::before {
    background: var(--flare-600);
    transform: scale(1.5);
  }

  .page-about .about-rail__name {
    color: var(--gray-400);
    transition: color .18s var(--ease);
  }

  .page-about .about-rail__link:hover .about-rail__name,
  .page-about .about-rail__link:focus-visible .about-rail__name {
    color: var(--paper-100);
  }

  .page-about .about-quote {
    padding: 32px 34px 26px;
  }

  .page-about .about-line__title {
    font-size: 24px;
  }

  .page-about .about-lines {
    gap: 18px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 6fr 5fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-team__roles {
    grid-template-columns: 1.1fr 1fr .9fr;
    gap: 10px;
  }

  .page-about .about-partners__panel {
    padding: 40px 42px 38px;
  }

  .page-about .about-home__grid {
    grid-template-columns: 5fr 6fr;
    gap: 34px;
    align-items: center;
  }
}

/* ---------- 悬停补充说明 ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-about .about-stat:hover .about-stat__note,
  .page-about .about-stat:focus-visible .about-stat__note {
    max-height: 90px;
    opacity: 1;
  }
}

@media (hover: none) {
  .page-about .about-stat__note {
    max-height: 90px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line:nth-child(2) {
    transform: none;
  }

  .page-about .about-stat__note,
  .page-about .about-rail__link,
  .page-about .about-path__item::before {
    transition: none;
  }
}
<<<END>>>