.page-about {
  --about-cut: 26px;
  --about-cut-sm: 16px;
  --about-gap: clamp(28px, 5vw, 64px);
  --about-team-line: rgba(7, 26, 23, .14);
  --about-team-muted: rgba(7, 26, 23, .66);
  color: var(--mist);
  background: var(--ink);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.05;
  color: inherit;
}

.page-about h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.75rem);
}

.page-about h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-about p {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: var(--about-gap);
  padding-block: clamp(20px, 3vw, 36px) clamp(48px, 7vw, 92px);
}

.page-about .about-hero h1 {
  font-size: clamp(2.3rem, 6.2vw, 4.4rem);
  line-height: .98;
  margin-top: 14px;
  max-width: 14ch;
}

.page-about .about-hero .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 46ch;
  color: var(--mist);
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: clamp(18px, 2.4vw, 24px) 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 24px);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-facts__label {
  font-size: var(--step--1);
  color: var(--sage);
  line-height: 1.4;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-frame {
  position: relative;
  margin: 0;
  padding: clamp(10px, 1.6vw, 18px);
  border: 1px solid var(--hairline);
  background: linear-gradient(150deg, rgba(53, 240, 200, .12), rgba(14, 43, 38, .92) 62%);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .about-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--about-cut-sm)) 0, 100% var(--about-cut-sm), 100% 100%, 0 100%);
}

.page-about .about-frame figcaption {
  margin-top: 14px;
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 发展节点 ---------- */
.page-about .about-journey {
  background: linear-gradient(180deg, var(--ink), var(--panel) 55%, var(--ink));
}

.page-about .about-journey__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-journey__head h2 {
  margin-top: 14px;
  max-width: 18ch;
}

.page-about .about-journey__note {
  margin-top: 18px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--sage);
  max-width: 34ch;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: track;
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 16px;
  padding: clamp(18px, 2.4vw, 26px) 0 clamp(18px, 2.4vw, 26px) 16px;
  border-top: 1px solid var(--hairline);
}

.page-about .about-track__item:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .32s ease;
}

.page-about .about-track__item:hover::before,
.page-about .about-track__item:focus-within::before {
  transform: scaleY(1);
}

.page-about .about-track__no {
  font-family: var(--font-mono);
  font-size: var(--step-2);
  font-weight: 500;
  line-height: 1.1;
  color: var(--cyan);
  transition: color .25s ease;
}

.page-about .about-track__item:hover .about-track__no,
.page-about .about-track__item:focus-within .about-track__no {
  color: var(--amber);
}

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

.page-about .about-track__phase {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--sage);
  margin-bottom: 8px;
}

.page-about .about-track__title {
  color: var(--mist);
}

.page-about .about-track__text {
  margin-top: 10px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: rgba(234, 246, 241, .72);
  max-width: 56ch;
}

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

.page-about .about-team__head {
  max-width: 62ch;
}

.page-about .about-team__head h2 {
  margin-top: 14px;
}

.page-about .about-team__note {
  margin-top: 16px;
  font-size: var(--step-1);
  line-height: 1.8;
  color: var(--about-team-muted);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--about-team-line);
  background: var(--mist-bright);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

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

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 0 18px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--about-team-line);
}

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

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

.page-about .about-roles__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-deep);
  letter-spacing: -.03em;
}

.page-about .about-roles__body h3 {
  color: var(--ink);
}

.page-about .about-roles__body p {
  margin-top: 10px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--about-team-muted);
  max-width: 52ch;
}

.page-about .about-team__throughput {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding: 16px 20px;
  border-left: 3px solid var(--amber);
  background: rgba(255, 179, 71, .12);
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  background: var(--ink);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-about .about-coverage__counter {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--hairline);
  background:
    radial-gradient(circle at 88% 12%, rgba(53, 240, 200, .18), transparent 62%),
    var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-coverage__num {
  font-family: var(--font-mono);
  font-size: clamp(64px, 11vw, 96px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.05em;
  color: var(--cyan);
}

.page-about .about-coverage__unit {
  font-size: var(--step-0);
  color: var(--sage);
}

.page-about .about-coverage__body h2 {
  margin-top: 14px;
  max-width: 20ch;
}

.page-about .about-coverage__text {
  margin-top: 16px;
  font-size: var(--step-0);
  line-height: 1.85;
  color: rgba(234, 246, 241, .74);
  max-width: 56ch;
}

.page-about .about-metrics {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-metrics li {
  padding: 7px 15px;
  font-size: var(--step--1);
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--mist);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  background: rgba(18, 63, 56, .7);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: linear-gradient(180deg, var(--ink), var(--panel-2) 120%);
  padding-top: 0;
}

.page-about .about-partners__banner {
  margin: 0 0 clamp(28px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}

.page-about .about-partners__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
  opacity: .55;
}

.page-about .about-partners__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 26, 23, .35), var(--ink) 96%);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

.page-about .about-partners__lead h2 {
  margin-top: 14px;
  max-width: 22ch;
}

.page-about .about-partners__lead p {
  margin-top: 16px;
  font-size: var(--step-0);
  line-height: 1.85;
  color: rgba(234, 246, 241, .74);
  max-width: 56ch;
}

.page-about .about-tags {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-tags li {
  padding: 9px 17px;
  font-size: var(--step--1);
  color: var(--mist);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  background: rgba(53, 240, 200, .07);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .about-tags li:hover,
.page-about .about-tags li:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: rgba(53, 240, 200, .16);
}

.page-about .about-partner-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-about .about-partner-stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--panel);
}

.page-about .about-partner-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-partner-stats__num--amber {
  color: var(--amber);
}

.page-about .about-partner-stats__label {
  font-size: var(--step--1);
  line-height: 1.55;
  color: var(--sage);
}

/* ---------- 持续更新 ---------- */
.page-about .about-honor {
  background: var(--ink);
}

.page-about .about-honor__panel {
  position: relative;
  padding: clamp(26px, 4.4vw, 56px);
  background:
    radial-gradient(circle at 92% 8%, rgba(59, 42, 107, .55), transparent 58%),
    linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--hairline);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-honor__body {
  position: relative;
  z-index: 1;
  max-width: 60ch;
}

.page-about .about-honor__body h2 {
  margin-top: 14px;
}

.page-about .about-honor__text {
  margin-top: 16px;
  font-size: var(--step-0);
  line-height: 1.85;
  color: rgba(234, 246, 241, .76);
}

.page-about .about-honor__list {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-honor__list li {
  padding-left: 18px;
  position: relative;
  font-size: var(--step-0);
  line-height: 1.75;
  color: rgba(234, 246, 241, .82);
}

.page-about .about-honor__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-honor__list strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--amber);
  margin-right: 6px;
}

.page-about .about-honor__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-honor__mark {
  position: absolute;
  right: clamp(-8px, 1vw, 24px);
  bottom: -0.22em;
  font-family: var(--font-mono);
  font-size: clamp(140px, 24vw, 280px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.06em;
  color: rgba(53, 240, 200, .07);
  pointer-events: none;
  user-select: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-partner-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-journey__grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-journey__head {
    position: sticky;
    top: 108px;
  }
}

@media (max-width: 640px) {
  .page-about .about-roles__item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 0 14px;
  }

  .page-about .about-track__item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 0 12px;
  }

  .page-about .about-honor__mark {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__item::before,
  .page-about .about-track__no,
  .page-about .about-tags li {
    transition: none;
  }

  .page-about .about-tags li:hover {
    transform: none;
  }
}