.page-about {
  --about-axis: rgba(232, 237, 247, .16);
  --about-node: #FF6A2B;
  --about-panel: rgba(232, 237, 247, .035);
  --about-panel-hi: rgba(41, 230, 208, .07);
  display: block;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-crumb {
  padding-top: clamp(88px, 10vw, 116px);
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(48px, 7vw, 92px);
  background:
    radial-gradient(120% 92% at 90% 4%, rgba(41, 230, 208, .15), transparent 58%),
    radial-gradient(90% 80% at 4% 96%, rgba(122, 77, 255, .18), transparent 62%);
  overflow: clip;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -26%;
  width: 64%;
  height: 78%;
  background: linear-gradient(152deg, rgba(11, 59, 60, .78), rgba(110, 18, 48, .5));
  clip-path: polygon(30% 0, 100% 16%, 100% 100%, 0 100%);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__copy .eyebrow {
  margin-bottom: 16px;
}

.page-about .about-hero__copy .display-1 {
  margin: 0 0 20px;
}

.page-about .about-hero__copy .lede {
  max-width: 34em;
  margin: 0 0 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-hero__pulse {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line-weak);
  padding-top: 20px;
}

.page-about .about-hero__pulse li {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-hero__pulse-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-orange);
  letter-spacing: .01em;
  min-width: 2.2em;
}

.page-about .about-hero__pulse-txt {
  font-size: 15px;
  color: var(--c-mute);
}

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

.page-about .about-hero__media {
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-weak);
  clip-path: polygon(0 5%, 94% 0, 100% 90%, 6% 100%);
  background: rgba(14, 23, 64, .6);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__figure .figure__caption {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-mute);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-origin__aside .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-origin__aside .display-3 {
  margin: 0 0 20px;
}

.page-about .about-origin__stamp {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  padding: 6px 12px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-pill);
  display: inline-block;
  margin: 0;
}

.page-about .about-origin__body {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--line-weak);
}

.page-about .about-origin__body p {
  margin: 0 0 18px;
}

.page-about .about-origin__body p:first-child::first-letter {
  font-family: var(--font-mono);
  font-size: 2.4em;
  line-height: .9;
  color: var(--c-cyan);
  float: left;
  margin: 6px 12px 0 0;
}

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

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 32px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(41, 230, 208, .7), rgba(41, 230, 208, .1) 52%, rgba(255, 106, 43, .62));
}

.page-about .tl-node {
  position: relative;
  padding-bottom: 14px;
}

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

.page-about .tl-node__detail {
  border-radius: var(--r-md);
}

.page-about .tl-node__summary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: 14px;
  row-gap: 8px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: var(--about-panel);
  border: 1px solid var(--line-weak);
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node__summary::marker {
  content: "";
}

.page-about .tl-node__summary:hover {
  background: var(--about-panel-hi);
  border-color: var(--line-cyan);
}

.page-about .tl-node__summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-about .tl-node__marker {
  position: absolute;
  left: -32px;
  top: 26px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--c-space);
  border: 1px solid rgba(255, 106, 43, .78);
  box-shadow: 0 0 0 5px rgba(255, 106, 43, .12);
}

.page-about .tl-node__marker::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--c-orange);
}

.page-about .tl-node__stage {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
}

.page-about .tl-node__title {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--c-white);
  letter-spacing: -.01em;
}

.page-about .tl-node__chev {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-mute);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .tl-node__detail[open] .tl-node__summary {
  background: var(--about-panel-hi);
  border-color: var(--line-cyan);
}

.page-about .tl-node__detail[open] .tl-node__chev {
  transform: rotate(45deg);
  color: var(--c-cyan);
}

.page-about .tl-node__panel {
  padding: 16px 20px 6px;
  margin-left: 2px;
  border-left: 1px solid var(--line-weak);
  margin-top: 8px;
}

.page-about .tl-node__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

/* ---------- 数据来源 ---------- */

.page-about .about-data__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-data__aside .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-data__aside .display-3 {
  margin: 0 0 18px;
}

.page-about .about-data__note {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mute);
  max-width: 34em;
}

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

.page-about .about-data__flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 20px 22px 22px;
  border-radius: var(--r-md);
  background: var(--about-panel);
  border: 1px solid var(--line-weak);
  border-left: 2px solid rgba(41, 230, 208, .5);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .flow-step:hover {
  background: var(--about-panel-hi);
  border-left-color: var(--c-orange);
}

.page-about .flow-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  margin-bottom: 8px;
}

.page-about .flow-step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: -.01em;
}

.page-about .flow-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-body);
}

/* ---------- 团队 ---------- */

.page-about .about-team__head {
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

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

.page-about .about-team__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-weak);
  background: rgba(7, 15, 43, .5);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team__figure .figure__caption {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-mute);
}

.page-about .about-team__roles {
  display: grid;
  gap: 0;
}

.page-about .team-role {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 6px;
  padding: 20px 0;
  border-top: 1px solid var(--line-weak);
}

.page-about .team-role:last-child {
  border-bottom: 1px solid var(--line-weak);
}

.page-about .team-role__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
  align-self: start;
  padding-top: 4px;
}

.page-about .team-role__name {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: -.01em;
}

.page-about .team-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-body);
}

/* ---------- 覆盖版图 ---------- */

.page-about .about-reach__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-reach__copy .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-reach__copy .display-3 {
  margin: 0 0 18px;
}

.page-about .about-reach__lede {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-body);
  max-width: 34em;
}

.page-about .about-reach__stats {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .reach-stat {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid var(--line-weak);
}

.page-about .reach-stat:last-child {
  border-bottom: 1px solid var(--line-weak);
}

.page-about .reach-stat__label {
  margin: 0;
  font-size: 14px;
  color: var(--c-mute);
}

.page-about .reach-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
  text-align: right;
  letter-spacing: -.01em;
}

.page-about .reach-stat__value--accent {
  color: var(--c-orange);
}

.page-about .about-reach__visual {
  position: relative;
  aspect-ratio: 12 / 7;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-weak);
  background: radial-gradient(120% 100% at 28% 18%, rgba(41, 230, 208, .12), transparent 62%), rgba(14, 23, 64, .55);
}

.page-about .about-reach__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .5;
}

.page-about .about-reach__grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.page-about .reach-hot {
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transform-origin: center;
}

.page-about .reach-hot:hover {
  opacity: .82;
  transform: scale(1.28);
}

.page-about .about-reach__legend {
  position: absolute;
  left: 16px;
  bottom: 14px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-mute);
  background: rgba(7, 15, 43, .72);
  border: 1px solid var(--line-weak);
  border-radius: var(--r-pill);
  padding: 5px 12px;
}

/* ---------- 共建生态 ---------- */

.page-about .about-partners {
  background:
    linear-gradient(180deg, rgba(110, 18, 48, .34), rgba(7, 15, 43, 0) 78%),
    radial-gradient(90% 80% at 96% 0%, rgba(122, 77, 255, .2), transparent 60%);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-partners__aside .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-partners__aside .display-3 {
  margin: 0 0 18px;
}

.page-about .about-partners__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-body);
  max-width: 32em;
}

.page-about .about-partners__groups {
  display: grid;
  gap: 18px;
}

.page-about .partner-group {
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: rgba(232, 237, 247, .04);
  border: 1px solid var(--line-weak);
}

.page-about .partner-group__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: -.01em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .partner-group__count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-cyan);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-pill);
  padding: 2px 9px;
}

.page-about .partner-group__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-body);
}

.page-about .about-partners__cadence {
  margin: 4px 0 0;
  padding: 18px 22px;
  border-radius: var(--r-md);
  background: linear-gradient(120deg, rgba(41, 230, 208, .1), rgba(122, 77, 255, .12));
  border: 1px solid var(--line-cyan);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 三件事 ---------- */

.page-about .about-values__head {
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-values__grid {
  display: grid;
  gap: 16px;
}

.page-about .value-card {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(122, 77, 255, .12), rgba(232, 237, 247, .025));
  border: 1px solid var(--line-weak);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .value-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
}

.page-about .value-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: rgba(232, 237, 247, .16);
  margin-bottom: 14px;
}

.page-about .value-card__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: -.01em;
}

.page-about .value-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

/* ---------- 荣誉 ---------- */

.page-about .about-honors__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-honors__aside .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-honors__aside .display-3 {
  margin: 0 0 16px;
}

.page-about .about-honors__lede {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mute);
  max-width: 26em;
}

.page-about .honors-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .honor-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line-weak);
  align-items: baseline;
}

.page-about .honor-item:last-child {
  border-bottom: 1px solid var(--line-weak);
}

.page-about .honor-item__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-orange);
}

.page-about .honor-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-body);
}

/* ---------- 继续了解 ---------- */

.page-about .about-next__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

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

.page-about .next-link {
  display: grid;
  gap: 8px;
  padding: 24px 22px 26px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-weak);
  background: var(--about-panel);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--line-cyan);
  background: var(--about-panel-hi);
  transform: translateY(-3px);
}

.page-about .next-link:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-about .next-link__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-about .next-link__title {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--c-white);
  letter-spacing: -.01em;
}

.page-about .next-link__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mute);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__pulse {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-hero__pulse li {
    flex-direction: column;
    gap: 6px;
  }

  .page-about .about-hero__pulse-num {
    font-size: 28px;
  }

  .page-about .about-data__flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-partners__groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-honors__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .about-timeline__list {
    padding-left: 58px;
  }

  .page-about .about-timeline__list::before {
    left: 22px;
  }

  .page-about .tl-node__marker {
    left: -44px;
    top: 28px;
    width: 17px;
    height: 17px;
  }

  .page-about .tl-node__summary {
    padding: 22px 26px;
  }

  .page-about .tl-node__title {
    font-size: 19px;
  }

  .page-about .tl-node__panel {
    padding: 18px 26px 8px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .value-card,
  .page-about .next-link,
  .page-about .flow-step,
  .page-about .tl-node__summary,
  .page-about .tl-node__chev,
  .page-about .reach-hot {
    transition: none;
  }

  .page-about .value-card:hover,
  .page-about .next-link:hover,
  .page-about .next-link:focus-visible {
    transform: none;
  }

  .page-about .reach-hot:hover {
    transform: none;
  }
}