.page-about {
  --ab-cut: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  background: var(--ink);
  color: var(--snow);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(3rem, 8vw, 6rem);
  background: var(--ink-2);
}

.page-about .ab-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .ab-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .ab-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(88% 68% at 84% 4%, rgba(59, 33, 104, 0.72), transparent 62%),
    linear-gradient(180deg, rgba(10, 26, 51, 0.6) 0%, rgba(10, 26, 51, 0.87) 56%, var(--ink) 100%);
}

.page-about .ab-hero__inner {
  position: relative;
}

.page-about .ab-crumbs-sep {
  margin: 0 0.5em;
  opacity: 0.5;
}

.page-about .ab-hero__title {
  margin: 0.75rem 0 0;
  max-width: 20ch;
  font-size: clamp(2.05rem, 5.6vw, 4.2rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .ab-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 60ch;
  color: var(--frost);
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.05rem;
  background: rgba(16, 49, 92, 0.58);
}

.page-about .ab-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .ab-hero__cap {
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--frost);
}

/* ---------- 分区通用 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.page-about .ab-sec--pine {
  background: var(--pine);
  color: var(--snow);
}

.page-about .ab-sec--snow {
  background: var(--snow);
  color: var(--slate);
}

.page-about .ab-sec--indigo {
  background: var(--indigo);
  color: var(--snow);
}

.page-about .ab-sec--ink {
  background: var(--ink);
  color: var(--snow);
}

.page-about .ab-slantcut {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--cyan) 42%, transparent 88%);
  transform: rotate(-0.7deg);
  transform-origin: left center;
  opacity: 0.85;
}

.page-about .ab-sec__head {
  max-width: 62ch;
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .ab-sec__head--wide {
  max-width: 74ch;
}

.page-about .ab-sec__head .ub-h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.65rem, 3.6vw, 2.5rem);
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.page-about .ab-sec__sub {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  opacity: 0.86;
}

.page-about .ab-sec--snow .ab-sec__sub,
.page-about .ab-sec--snow .ab-team__lead {
  color: var(--slate);
}

.page-about .ab-sec--snow .ub-kicker {
  color: var(--wine);
}

.page-about .ab-sec--snow .ub-h2,
.page-about .ab-sec--snow .ub-h3 {
  color: var(--ink);
}

/* ---------- 更新节拍 ---------- */
.page-about .ab-pulse {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(199, 210, 224, 0.14);
  border-top: 1px solid rgba(199, 210, 224, 0.22);
  border-bottom: 1px solid rgba(199, 210, 224, 0.22);
}

.page-about .ab-pulse__item {
  padding: 1.5rem 0.25rem 1.5rem 0;
}

.page-about .ab-pulse__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .ab-pulse__label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--frost);
}

.page-about .ab-pulse__more {
  margin: 0.75rem 0 0;
  max-width: 34ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--frost);
  opacity: 0.6;
  transition: opacity 0.25s ease;
}

.page-about .ab-pulse__item:hover .ab-pulse__more,
.page-about .ab-pulse__item:focus-within .ab-pulse__more {
  opacity: 1;
}

.page-about .ab-dayflow {
  margin-top: clamp(2rem, 4vw, 3rem);
  border: 1px solid rgba(199, 210, 224, 0.24);
  background: rgba(10, 26, 51, 0.35);
  clip-path: var(--ab-cut);
}

.page-about .ab-dayflow summary {
  cursor: pointer;
  list-style: none;
  padding: 1.05rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--snow);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-about .ab-dayflow summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-dayflow summary::before {
  content: "";
  flex: 0 0 auto;
  width: 12px;
  height: 2px;
  background: var(--gold);
  box-shadow: 0 0 0 0 var(--gold);
  transition: transform 0.2s ease;
}

.page-about .ab-dayflow[open] summary::before {
  transform: rotate(90deg);
}

.page-about .ab-dayflow summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .ab-dayflow__list {
  list-style: none;
  margin: 0;
  padding: 0 1.25rem 1.25rem;
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-dayflow__step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.3rem;
  padding: 0.85rem 0 0.85rem 0.9rem;
  border-left: 2px solid rgba(61, 224, 200, 0.45);
}

.page-about .ab-dayflow__time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-about .ab-dayflow__body {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--frost);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.page-about .ab-team__lead {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .ab-team__roles {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(58, 71, 87, 0.22);
}

.page-about .ab-role {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid rgba(58, 71, 87, 0.22);
}

.page-about .ab-role__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--gold);
  letter-spacing: -0.03em;
}

.page-about .ab-role__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .ab-role__desc {
  margin: 0.4rem 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .ab-team__media {
  margin: 0;
  position: relative;
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: var(--ab-cut);
  background: var(--panel);
}

.page-about .ab-team__media figcaption {
  margin-top: 0.85rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--gold);
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 版本时间线 ---------- */
.page-about .ab-versions {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.1rem;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(224, 169, 58, 0.5) 55%, rgba(224, 169, 58, 0.12) 100%);
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  padding: 0 0 clamp(1.75rem, 3.5vw, 2.75rem);
}

.page-about .ab-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl__node {
  position: absolute;
  left: -2.1rem;
  top: 0.42rem;
  width: 14px;
  height: 14px;
  background: var(--ink);
  border: 2px solid var(--gold);
  clip-path: var(--cut-sm);
}

.page-about .ab-tl__item--current .ab-tl__node {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px rgba(139, 255, 60, 0.16);
}

.page-about .ab-tl__era {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .ab-tl__item--current .ab-tl__era {
  color: var(--lime);
}

.page-about .ab-tl__body .ub-h3 {
  margin: 0.35rem 0 0;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .ab-tl__body p {
  margin: 0.6rem 0 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--frost);
}

.page-about .ab-versions__media {
  margin: 0;
}

.page-about .ab-versions__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  clip-path: var(--ab-cut);
  background: var(--panel);
}

.page-about .ab-versions__media figcaption {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--frost);
  opacity: 0.8;
}

/* ---------- 内容范围 ---------- */
.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(244, 247, 251, 0.16);
  border: 1px solid rgba(244, 247, 251, 0.2);
}

.page-about .ab-fact {
  padding: 1.4rem 1.15rem 1.5rem;
  background: rgba(10, 26, 51, 0.32);
  outline: none;
}

.page-about .ab-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .ab-fact__unit {
  margin-left: 0.2rem;
  font-size: 0.85rem;
  color: var(--cyan);
}

.page-about .ab-fact__label {
  margin: 0.65rem 0 0;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--snow);
}

.page-about .ab-fact__more {
  margin: 0.65rem 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--frost);
  opacity: 0.55;
  transition: opacity 0.25s ease;
}

.page-about .ab-fact:hover .ab-fact__more,
.page-about .ab-fact:focus-visible .ab-fact__more {
  opacity: 1;
}

.page-about .ab-fact:focus-visible {
  box-shadow: inset 0 0 0 2px var(--lime);
}

.page-about .ab-scope-notes {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .ab-scope-note {
  padding-left: 1rem;
  border-left: 3px solid var(--gold);
}

.page-about .ab-scope-note__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--snow);
}

.page-about .ab-scope-note p {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--frost);
}

/* ---------- 合作与下一步 ---------- */
.page-about .ab-mile {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .ab-mile__item {
  padding: 1.35rem 1.25rem;
  background: rgba(16, 49, 92, 0.5);
  border-left: 3px solid var(--cyan);
  clip-path: var(--ab-cut);
}

.page-about .ab-mile__item--accent {
  background: rgba(108, 31, 60, 0.42);
  border-left-color: var(--gold);
}

.page-about .ab-mile__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.55rem;
  color: var(--ink);
  background: var(--cyan);
  clip-path: var(--cut-tag);
}

.page-about .ab-mile__item--accent .ab-mile__tag {
  background: var(--gold);
}

.page-about .ab-mile__item .ub-h3 {
  margin: 0.85rem 0 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--snow);
}

.page-about .ab-mile__item p {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--frost);
}

.page-about .ab-next {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

.page-about .ab-next__title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-about .ab-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-next__item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.1rem;
  background: rgba(16, 49, 92, 0.35);
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.page-about .ab-next__item:hover,
.page-about .ab-next__item:focus-visible {
  background: rgba(139, 255, 60, 0.12);
  transform: translateX(3px);
  outline: none;
}

.page-about .ab-next__item:focus-visible {
  box-shadow: inset 0 0 0 2px var(--lime);
}

.page-about .ab-next__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .ab-next__n {
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--snow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 920px;
  }

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

  .page-about .ab-pulse__item {
    padding: 1.75rem 1.5rem 1.75rem 0;
  }

  .page-about .ab-pulse__item:nth-child(2) {
    padding-left: 1.5rem;
  }

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

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

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

@media (min-width: 900px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .ab-team__media {
    position: sticky;
    top: 120px;
  }

  .page-about .ab-versions {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .ab-tl {
    padding-left: 11rem;
  }

  .page-about .ab-tl::before {
    left: 9.6rem;
  }

  .page-about .ab-tl__node {
    left: -11rem;
    top: 0.35rem;
  }

  .page-about .ab-tl__item {
    grid-template-columns: 9.4rem minmax(0, 1fr);
    gap: 1.4rem;
    align-items: start;
  }

  .page-about .ab-tl__era {
    text-align: right;
    padding-top: 0.15rem;
  }

  .page-about .ab-tl__body .ub-h3 {
    margin-top: 0;
  }

  .page-about .ab-scope-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }

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

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

@media (min-width: 1100px) {
  .page-about .ab-hero {
    padding-bottom: clamp(4rem, 7vw, 7rem);
  }

  .page-about .ab-versions {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-about .ab-versions__media {
    position: sticky;
    top: 120px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-pulse__more,
  .page-about .ab-fact__more,
  .page-about .ab-next__item {
    transition: none;
  }

  .page-about .ab-next__item:hover,
  .page-about .ab-next__item:focus-visible {
    transform: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</result>