.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: var(--mono-track);
  color: var(--ink-2);
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-about .about-crumb a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--red-deep);
  border-bottom-color: var(--red-deep);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(30px, 5vw, 62px);
  background:
    linear-gradient(118deg, rgba(200, 58, 46, .12) 0%, rgba(200, 58, 46, 0) 44%),
    linear-gradient(302deg, rgba(31, 79, 168, .13) 0%, rgba(31, 79, 168, 0) 46%);
}

.page-about .about-intro__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-intro__main h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -.012em;
  overflow-wrap: anywhere;
}

.page-about .about-intro__main h1::after {
  content: "";
  display: block;
  width: 104px;
  height: 6px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--red) 0 50%, var(--blue) 50% 100%);
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-lead--second {
  margin-top: 14px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.page-about .about-intro__panel {
  background: var(--ink);
  color: #F3EFE5;
  padding: 22px 20px 24px;
  border-radius: 3px 24px 3px 24px;
  position: relative;
  overflow: hidden;
}

.page-about .about-intro__panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--red) 0 62%, var(--blue) 62% 100%);
}

.page-about .about-panel-k {
  margin: 6px 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
}

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

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 11px;
  border-top: 1px solid rgba(243, 239, 229, .16);
}

.page-about .about-facts li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-facts__n {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.1;
  color: #F3EFE5;
  min-width: 4.2em;
  flex: none;
}

.page-about .about-facts__k {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(243, 239, 229, .74);
}

/* ---------- 章节标题 ---------- */
.page-about .about-head {
  margin-bottom: clamp(20px, 3.4vw, 34px);
  max-width: 46em;
}

.page-about .about-head h2 {
  margin: 6px 0 0;
  font-size: clamp(23px, 4.2vw, 38px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.008em;
  overflow-wrap: anywhere;
}

.page-about .about-head__sub {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-head--inv h2 {
  color: #F3EFE5;
}

.page-about .about-head--inv .about-head__sub {
  color: rgba(243, 239, 229, .72);
}

/* ---------- 正文 ---------- */
.page-about .rb-prose p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

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

/* ---------- 媒体 ---------- */
.page-about .rb-media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  background: var(--paper);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-origin__media {
  border-radius: 2px 20px 2px 20px;
  overflow: hidden;
  border: 1px solid var(--line);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--panel);
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--red) 0%, var(--blue) 100%);
  opacity: .5;
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 36px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 7px;
  width: 14px;
  height: 14px;
  background: var(--red);
  border: 2px solid var(--panel);
  box-shadow: 0 0 0 2px var(--red);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .about-tl__item--blue::before {
  background: var(--blue);
  box-shadow: 0 0 0 2px var(--blue);
}

.page-about .about-tl__year {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .about-tl__y {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .about-tl__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink-2);
  background: var(--paper);
}

.page-about .about-tl__item--red .about-tl__tag {
  border-color: rgba(200, 58, 46, .4);
  color: var(--red-deep);
}

.page-about .about-tl__item--blue .about-tl__tag {
  border-color: rgba(31, 79, 168, .38);
  color: var(--blue);
}

.page-about .about-tl__body {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px 16px 2px 16px;
  padding: 16px 18px 18px;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-tl__item--red .about-tl__body {
  border-left: 3px solid var(--red);
}

.page-about .about-tl__item--blue .about-tl__body {
  border-left: 3px solid var(--blue);
}

.page-about .about-tl__body:hover {
  transform: translateY(-2px);
  border-color: var(--ink-2);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--paper);
}

.page-about .about-team__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 16px;
  padding: 16px 18px;
  background: var(--panel);
  border-left: 3px solid var(--red);
  border-radius: 0 12px 12px 0;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-role:nth-child(2) {
  border-left-color: var(--blue);
}

.page-about .about-role:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .about-role:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(17, 24, 32, .08);
}

.page-about .about-role__n {
  grid-row: span 2;
  align-self: start;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: .95;
  color: var(--ink);
}

.page-about .about-role h3 {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-team__media {
  border-radius: 20px 2px 20px 2px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-flow {
  display: grid;
  gap: 12px;
  margin-top: 26px;
  padding: 18px 20px 20px;
  background: var(--ink);
  color: #F3EFE5;
  border-radius: 2px 20px 2px 20px;
}

.page-about .about-flow__step {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 239, 229, .82);
  border-left: 2px solid var(--blue);
  padding-left: 12px;
}

.page-about .about-flow__step:first-child {
  border-left-color: var(--red);
}

.page-about .about-flow__step b {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  background: var(--paper);
}

.page-about .about-scale__panel {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #F3EFE5;
  padding: clamp(24px, 4.4vw, 46px);
  border-radius: 3px 30px 3px 30px;
}

.page-about .about-scale__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 220px;
  height: 220px;
  background: var(--blue);
  opacity: .2;
  transform: rotate(28deg);
  pointer-events: none;
}

.page-about .about-scale__panel .rb-index {
  color: var(--gold);
}

.page-about .about-scale__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  position: relative;
  z-index: 1;
}

.page-about .about-stat {
  border-top: 1px solid rgba(243, 239, 229, .2);
  padding-top: 12px;
}

.page-about .about-stat__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: #F3EFE5;
}

.page-about .about-stat__n em {
  font-style: normal;
  font-size: .5em;
  color: var(--cyan);
  margin-left: 2px;
}

.page-about .about-stat__k {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(243, 239, 229, .7);
}

.page-about .about-scale__note {
  position: relative;
  z-index: 1;
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(243, 239, 229, .2);
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(243, 239, 229, .78);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  background: var(--panel);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-partners__media {
  border-radius: 2px 22px 2px 22px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-awards {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-award {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px;
  background: var(--paper);
  border-left: 3px solid var(--gold);
  border-radius: 0 10px 10px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .about-award__y {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
  flex: none;
}

.page-about .about-net {
  margin-top: 26px;
  padding: 14px 10px;
  background: var(--paper);
  border-radius: 2px 22px 2px 22px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-net svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-net__line {
  stroke-width: 1.6;
  stroke-dasharray: 5 5;
}

.page-about .about-net__line--blue {
  stroke: var(--blue);
  opacity: .5;
}

.page-about .about-net__line--red {
  stroke: var(--red);
  opacity: .5;
}

.page-about .about-net__node--blue {
  fill: rgba(31, 79, 168, .1);
  stroke: var(--blue);
  stroke-width: 1.6;
}

.page-about .about-net__node--red {
  fill: rgba(200, 58, 46, .1);
  stroke: var(--red);
  stroke-width: 1.6;
}

.page-about .about-net__hub {
  fill: var(--ink);
}

.page-about .about-net__hub-t {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  fill: #F3EFE5;
  text-anchor: middle;
}

.page-about .about-net__label {
  font-family: var(--font-sans);
  font-size: 11.5px;
  fill: var(--ink-2);
  text-anchor: middle;
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  background: var(--paper);
}

.page-about .about-next__panel {
  position: relative;
  padding: clamp(24px, 4vw, 42px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: 2px 26px 2px 26px;
  overflow: hidden;
}

.page-about .about-next__panel::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  background: var(--red);
  opacity: .08;
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about .about-next__copy h2 {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.22;
  font-weight: 800;
}

.page-about .about-next__copy p {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  position: relative;
  z-index: 1;
}

.page-about .about-next__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
  position: relative;
  z-index: 1;
}

.page-about .about-next__note a {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(142, 31, 24, .4);
}

.page-about .about-next__note a:hover,
.page-about .about-next__note a:focus-visible {
  border-bottom-color: var(--red-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px 24px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
  }
}

@media (min-width: 820px) {
  .page-about .about-tl {
    gap: 26px;
  }

  .page-about .about-tl::before {
    left: 118px;
  }

  .page-about .about-tl__item {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 28px;
    padding-left: 0;
  }

  .page-about .about-tl__item::before {
    left: 112px;
    top: 8px;
  }

  .page-about .about-tl__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 0;
    padding-top: 6px;
  }

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

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 42px;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-next__panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px 32px;
    align-items: end;
  }

  .page-about .about-next__links {
    margin-top: 0;
    justify-content: flex-end;
  }

  .page-about .about-next__note {
    grid-column: 1 / -1;
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__body,
  .page-about .about-role,
  .page-about .about-crumb a {
    transition: none;
  }

  .page-about .about-tl__body:hover,
  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>