.page-about {
  --about-radius: 16px;
  --about-radius-sm: 10px;
  --about-card-pad: 24px;
  display: block;
  padding-bottom: 24px;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-topline {
  padding-top: 24px;
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 64px;
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  left: -220px;
  width: 620px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(0, 87, 255, .30), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 40px;
  right: -220px;
  width: 560px;
  height: 560px;
  background: radial-gradient(closest-side, rgba(225, 6, 0, .24), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 18px;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rb-body-text);
}

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

.page-about .about-hero__panel {
  border-radius: var(--about-radius);
  padding: 20px;
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(0, 87, 255, .20), transparent 58%),
    var(--rb-panel);
  border: 1px solid var(--rb-line);
  box-shadow: 0 24px 60px -40px rgba(0, 87, 255, .9);
}

.page-about .about-hero__panelhead {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--rb-mist);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rb-line);
  border-radius: var(--about-radius-sm);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--rb-ink);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-stats li::before {
  content: "";
  display: block;
  width: 22px;
  height: 3px;
  border-radius: 2px;
  margin-bottom: 8px;
  background: var(--rb-blue);
}

.page-about .about-stats li:nth-child(2)::before { background: var(--rb-red); }
.page-about .about-stats li:nth-child(3)::before { background: var(--rb-cyan); }
.page-about .about-stats li:nth-child(4)::before { background: var(--rb-amber); }

.page-about .about-stats__num {
  font-size: clamp(32px, 8vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--rb-cream);
  letter-spacing: -0.03em;
}

.page-about .about-stats__unit {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--rb-mist);
}

.page-about .about-stats__label {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--rb-body-text);
}

/* ---------- 品牌由来 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-origin__lead h2 {
  margin: 12px 0 16px;
  font-size: clamp(24px, 5.4vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-origin__note {
  margin: 0;
  padding-left: 16px;
  border-left: 3px solid var(--rb-red);
  font-size: 15px;
  line-height: 1.8;
  color: var(--rb-body-text);
  max-width: 44ch;
}

.page-about .about-origin__body p {
  color: var(--rb-body-text);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-section {
  padding-bottom: 72px;
}

.page-about .about-timeline__head {
  margin-bottom: 26px;
}

.page-about .about-timeline__head h2 {
  margin: 12px 0 10px;
  font-size: clamp(23px, 5.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-timeline__hint {
  margin: 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--rb-mist);
}

.page-about .about-timeline {
  position: relative;
  padding: 0 var(--rb-shell-pad);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--rb-blue-hi);
  outline-offset: -2px;
}

.page-about .about-timeline__track {
  list-style: none;
  margin: 0;
  padding: 6px 0 26px;
  display: flex;
  gap: 18px;
  scroll-snap-type: x proximity;
  min-width: max-content;
}

.page-about .about-timeline__node {
  position: relative;
  flex: 0 0 268px;
  scroll-snap-align: start;
  padding: 48px 20px 22px;
  border-radius: var(--about-radius);
  background: var(--rb-panel);
  border: 1px solid var(--rb-line);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: 19px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--rb-stone);
}

.page-about .about-timeline__node::after {
  content: "";
  position: absolute;
  top: 12px;
  left: 20px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--rb-cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, .20);
}

.page-about .about-timeline__node:nth-child(2)::after {
  background: var(--rb-blue-hi);
  box-shadow: 0 0 0 4px rgba(0, 87, 255, .24);
}

.page-about .about-timeline__node:nth-child(3)::after {
  background: var(--rb-amber);
  box-shadow: 0 0 0 4px rgba(255, 179, 0, .20);
}

.page-about .about-timeline__node:nth-child(4)::after {
  background: var(--rb-red);
  box-shadow: 0 0 0 4px rgba(225, 6, 0, .22);
}

.page-about .about-timeline__year {
  display: block;
  font-size: clamp(34px, 9vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--rb-cream);
  margin-bottom: 12px;
}

.page-about .about-timeline__node h3 {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--rb-cream);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rb-body-text);
}

/* ---------- 团队 ---------- */
.page-about .about-team__media {
  margin: 0 0 40px;
}

.page-about .about-team__head {
  max-width: 66ch;
  margin-bottom: 30px;
}

.page-about .about-team__head h2 {
  margin: 12px 0 14px;
  font-size: clamp(23px, 5.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-team__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rb-body-text);
}

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

.page-about .about-role {
  border-radius: var(--about-radius);
  background: var(--rb-panel);
  border: 1px solid var(--rb-line);
  border-left: 3px solid var(--rb-blue);
  overflow: hidden;
}

.page-about .about-role--red { border-left-color: var(--rb-red); }
.page-about .about-role--amber { border-left-color: var(--rb-amber); }

.page-about .about-role > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
}

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

.page-about .about-role > summary:focus-visible {
  outline: 2px solid var(--rb-blue-hi);
  outline-offset: -3px;
}

.page-about .about-role__num {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--rb-cream);
  letter-spacing: -0.03em;
  min-width: 52px;
}

.page-about .about-role__name {
  flex: 1 1 auto;
  font-size: 17px;
  font-weight: 700;
  color: var(--rb-cream);
}

.page-about .about-role__mark {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.page-about .about-role__mark::before,
.page-about .about-role__mark::after {
  content: "";
  position: absolute;
  background: var(--rb-mist);
  border-radius: 2px;
  transition: transform .22s ease, opacity .22s ease;
}

.page-about .about-role__mark::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.page-about .about-role__mark::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-about .about-role[open] .about-role__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .about-role[open] .about-role__mark::before {
  background: var(--rb-blue-hi);
}

.page-about .about-role__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--rb-stone);
  padding-top: 16px;
}

.page-about .about-role__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--rb-body-text);
}

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

.page-about .about-flow {
  margin-top: 32px;
  padding: 24px;
  border-radius: var(--about-radius);
  background: linear-gradient(140deg, rgba(0, 87, 255, .14), rgba(21, 26, 35, .9) 55%);
  border: 1px solid var(--rb-line);
}

.page-about .about-flow__title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--rb-cream);
}

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

.page-about .about-flow__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rb-body-text);
}

.page-about .about-flow__step {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--rb-blue-hi);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network {
  position: relative;
  isolation: isolate;
}

.page-about .about-network__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .25;
  z-index: -1;
  border-radius: var(--about-radius);
}

.page-about .about-network__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
  padding-top: 32px;
  padding-bottom: 32px;
}

.page-about .about-network__body h2 {
  margin: 12px 0 18px;
  font-size: clamp(23px, 5.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-network__body p {
  color: var(--rb-body-text);
}

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

.page-about .about-datacard {
  border-radius: var(--about-radius);
  background: var(--rb-panel);
  border: 1px solid var(--rb-line);
  padding: 22px;
}

.page-about .about-datacard__title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--rb-mist);
}

.page-about .about-datacard__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--rb-line);
  border-radius: var(--about-radius-sm);
  overflow: hidden;
}

.page-about .about-datacard__list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--rb-panel);
}

.page-about .about-datacard__list dt {
  font-size: 13px;
  color: var(--rb-mist);
}

.page-about .about-datacard__list dd {
  margin: 0;
  font-size: 14px;
  color: var(--rb-cream);
}

.page-about .about-datacard__list dd .rb-num {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-partners__body h2 {
  margin: 12px 0 18px;
  font-size: clamp(23px, 5.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-partners__body p {
  color: var(--rb-body-text);
}

.page-about .about-partners__cta {
  padding-top: 6px;
  font-size: 15px;
}

.page-about .about-partners__media {
  margin: 0;
  border-left: 3px solid var(--rb-green);
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  padding-bottom: 48px;
}

.page-about .about-contact__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 28px 22px;
  border-radius: var(--about-radius);
  background:
    radial-gradient(130% 130% at 0% 0%, rgba(225, 6, 0, .22), transparent 55%),
    radial-gradient(120% 120% at 100% 100%, rgba(0, 87, 255, .22), transparent 55%),
    var(--rb-panel);
  border: 1px solid var(--rb-line);
}

.page-about .about-contact__text h2 {
  margin: 12px 0 14px;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.26;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-cream);
}

.page-about .about-contact__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rb-body-text);
  max-width: 56ch;
}

.page-about .about-contact__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-contact__info dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-contact__info dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--rb-mist);
  margin-bottom: 4px;
}

.page-about .about-contact__info dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--rb-cream);
  word-break: break-word;
}

.page-about .about-contact__info dd a {
  color: var(--rb-blue-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 140, 255, .4);
}

.page-about .about-contact__info dd a:hover {
  border-bottom-color: var(--rb-blue-hi);
}

.page-about .about-contact__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--rb-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-role--blue {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 40px 0 88px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 5fr 7fr;
    gap: 64px;
  }

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

  .page-about .about-role--blue {
    grid-column: auto;
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-flow__list li {
    flex-direction: column;
    gap: 8px;
    padding-right: 12px;
    border-right: 1px solid var(--rb-stone);
  }

  .page-about .about-flow__list li:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .about-network__inner {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .page-about .about-network__aside {
    position: sticky;
    top: 112px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-contact__box {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    padding: 40px;
    align-items: start;
  }

  .page-about .about-timeline__node {
    flex: 0 0 320px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1fr minmax(420px, 520px);
  }

  .page-about .about-origin__grid {
    gap: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role__mark::before,
  .page-about .about-role__mark::after {
    transition: none;
  }
}
<<<END>>>