.page-about {
  --about-soft: #C3D1CA;
  --about-glow: rgba(200, 255, 61, 0.14);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 5vw, 3.4rem);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.6vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--paper);
  margin: 0.55rem 0 1.1rem;
  max-width: 20ch;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(1rem, 2.3vw, 1.1rem);
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.95rem 1.15rem;
  background: var(--panel);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 4vw, 1.85rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--mist);
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.72fr) minmax(15rem, 1fr);
    align-items: end;
  }
  .page-about .about-hero__stats {
    align-self: stretch;
    align-content: end;
  }
}

/* ---------- 通用区块组件 ---------- */
.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 4.4vw, 2.65rem);
  line-height: 1.14;
  color: var(--paper);
  margin: 0.5rem 0 1rem;
  max-width: 24ch;
  text-wrap: balance;
}

.page-about .about-body {
  margin: 0 0 0.9rem;
  max-width: 64ch;
  font-size: clamp(0.94rem, 2.2vw, 1rem);
  line-height: 1.85;
  color: var(--about-soft);
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(2rem, 6vw, 4rem);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(58%, 640px);
  height: 1px;
  background: linear-gradient(90deg, var(--lime), transparent);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-timeline__band {
  position: relative;
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-timeline__band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.88);
}

.page-about .about-timeline__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 27, 22, 0.1) 0%, rgba(7, 27, 22, 0.88) 100%);
  pointer-events: none;
}

.page-about .about-timeline__band figcaption {
  position: absolute;
  left: clamp(1rem, 3vw, 1.8rem);
  bottom: clamp(0.9rem, 2.5vw, 1.5rem);
  right: clamp(1rem, 3vw, 1.8rem);
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--paper);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.7rem;
  bottom: 0.4rem;
  width: 1px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--line) 14%, var(--line) 86%, transparent 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(1.3rem, 3.6vw, 2.1rem) clamp(1.7rem, 4vw, 2.4rem);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
  box-sizing: border-box;
}

.page-about .tl__details {
  border-bottom: 1px solid rgba(48, 68, 60, 0.6);
  padding-bottom: 0.6rem;
}

.page-about .tl__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.85rem;
  padding: 0.3rem 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__summary::marker {
  content: "";
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__head {
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.9vw, 1.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .tl__mark {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  margin-left: auto;
  width: 1rem;
  height: 1rem;
}

.page-about .tl__mark::before,
.page-about .tl__mark::after {
  content: "";
  position: absolute;
  background: var(--mist);
  border-radius: 2px;
  transition: transform 0.3s ease, background 0.3s ease;
}

.page-about .tl__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-about .tl__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-about .tl__details[open] .tl__mark::after {
  transform: translateX(-50%) scaleY(0);
}

.page-about .tl__details[open] .tl__mark::before {
  background: var(--lime);
}

.page-about .tl__body {
  padding-top: 0.55rem;
  max-width: 62ch;
}

.page-about .tl__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(2.5rem, 7vw, 5rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4.5vw, 3rem);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "role count"
    "bar bar"
    "note note";
  gap: 0.45rem 0.8rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.page-about .about-team__role {
  grid-area: role;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__count {
  grid-area: count;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__bar {
  grid-area: bar;
  display: block;
  height: 4px;
  border-radius: 4px;
  background: var(--line);
  overflow: hidden;
}

.page-about .about-team__bar i {
  display: block;
  height: 100%;
  width: var(--w);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--lime), var(--aqua));
}

.page-about .about-team__note {
  grid-area: note;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    align-items: start;
  }
}

/* ---------- 资料库方法 ---------- */
.page-about .about-method {
  padding: clamp(2.5rem, 7vw, 5rem) 0;
}

.page-about .about-method__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4.5vw, 3.2rem);
}

.page-about .about-method__media {
  border-radius: var(--radius);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
}

.page-about .about-method__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.85);
}

.page-about .about-steps {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-steps__item {
  position: relative;
  padding: 0.9rem 1rem 0.9rem 3rem;
  border-left: 2px solid var(--line);
  border-radius: 0 12px 12px 0;
  background: linear-gradient(90deg, rgba(87, 224, 194, 0.06), transparent 72%);
}

.page-about .about-steps__no {
  position: absolute;
  left: 0.95rem;
  top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  color: var(--aqua);
}

.page-about .about-steps__item h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--panel);
  padding: 0.85rem 0.95rem;
}

.page-about .about-facts__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-facts__key {
  margin: 0.2rem 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
  }
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  padding: clamp(2.5rem, 7vw, 5rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-versions__head {
  margin-bottom: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-versions__media {
  position: relative;
  margin: 0 0 clamp(1.5rem, 4vw, 2.3rem);
  border-radius: var(--radius);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 92%);
}

.page-about .about-versions__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: brightness(0.85) saturate(0.9);
}

.page-about .about-versions__media figcaption {
  position: absolute;
  left: clamp(0.9rem, 3vw, 1.6rem);
  bottom: clamp(1.6rem, 4.5vw, 2.6rem);
  right: clamp(0.9rem, 3vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-versions__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-about .about-ver {
  position: relative;
  padding: 1.4rem 1.15rem 1.15rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .about-ver::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), var(--aqua) 55%, transparent);
}

.page-about .about-ver__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--aqua);
  margin-bottom: 0.5rem;
}

.page-about .about-ver__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-ver__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-soft);
}

@media (min-width: 780px) {
  .page-about .about-versions__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: clamp(2.5rem, 7vw, 5rem) 0;
  background: linear-gradient(180deg, rgba(14, 42, 34, 0.7), rgba(7, 27, 22, 0) 78%);
}

.page-about .about-partners__head {
  margin-bottom: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-partners__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-about .about-partner {
  padding: 1.15rem 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(7, 27, 22, 0.55);
}

.page-about .about-partner__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--paper);
  padding-left: 0.75rem;
  position: relative;
}

.page-about .about-partner__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 3px;
  height: 0.85em;
  border-radius: 2px;
  background: var(--yellow);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-soft);
}

@media (min-width: 760px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 接下来 ---------- */
.page-about .about-next {
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(3rem, 8vw, 6rem);
}

.page-about .about-next__panel {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at 88% 10%, var(--about-glow), transparent 48%),
    linear-gradient(160deg, var(--panel), var(--ink) 74%);
  overflow: hidden;
}

.page-about .about-next__panel::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -42%;
  width: 44%;
  height: 180%;
  background: linear-gradient(90deg, transparent, rgba(87, 224, 194, 0.09));
  transform: rotate(14deg);
  pointer-events: none;
}

.page-about .about-next__panel > * {
  position: relative;
  z-index: 1;
}

.page-about .about-next__lead {
  margin-bottom: 1.2rem;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-next__list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-next__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--lime);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-cta .btn {
  flex: 1 1 auto;
  min-width: 8.5rem;
  text-align: center;
}

@media (min-width: 720px) {
  .page-about .about-cta .btn {
    flex: 0 0 auto;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .tl__mark::before,
  .page-about .tl__mark::after {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}