.page-about {
  --about-rail-w: 200px;
  --about-cut: 28px;
  background: var(--c-ink);
  color: var(--c-mist);
  font-family: var(--f-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--sk-header-h) + clamp(2.25rem, 7vw, 4.5rem)) 0 clamp(2.5rem, 7vw, 4.5rem);
  background:
    radial-gradient(92% 82% at 88% -20%, rgba(43, 227, 163, 0.22), transparent 62%),
    radial-gradient(70% 70% at 0% 112%, rgba(255, 194, 75, 0.10), transparent 66%),
    linear-gradient(166deg, #0B1F1A 0%, #0E2233 64%, #07141D 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -34%;
  width: 62%;
  height: 66%;
  background: linear-gradient(
    115deg,
    transparent 44%,
    rgba(43, 227, 163, 0.15) 45%,
    rgba(43, 227, 163, 0.15) 52%,
    transparent 53%
  );
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.25rem, 3.5vw, 2.25rem);
  font-size: var(--fs-small);
  color: var(--c-mist);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

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

.page-about .about-hero__intro .eyebrow {
  margin: 0;
  color: var(--c-mint);
  font-family: var(--f-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0.85rem 0 0;
  font-family: var(--f-display);
  font-size: clamp(2rem, 6.4vw, 3.85rem);
  font-weight: 800;
  font-style: italic;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--c-snow);
}

.page-about .about-hero__lead {
  margin: 1.15rem 0 0;
  max-width: 58ch;
  font-size: clamp(0.96rem, 1.6vw, 1.08rem);
  line-height: 1.95;
  color: var(--c-mist);
}

.page-about .about-hero__status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 1.1rem 0 0;
  padding: 0.4rem 0.75rem;
  background: rgba(7, 20, 29, 0.6);
  border: 1px solid var(--c-line);
  font-size: 0.8rem;
  color: var(--c-glow);
  letter-spacing: 0.02em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-hero__panel {
  padding: clamp(1.15rem, 3vw, 1.7rem);
  background: linear-gradient(155deg, rgba(43, 227, 163, 0.16), rgba(14, 34, 51, 0.94) 44%, rgba(7, 20, 29, 0.97));
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-hero__panel-title {
  margin: 0 0 0.9rem;
  font-family: var(--f-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.85rem 0.8rem;
  background: #08171F;
  min-width: 0;
}

.page-about .about-facts__num {
  font-family: var(--f-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-amber);
  letter-spacing: -0.01em;
}

.page-about .about-facts__label {
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--c-mist);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, #0B1F1A 0%, #07141D 88%);
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3.5vw, 2.5rem);
  align-items: start;
}

/* 章节轨道 */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__label {
  display: none;
  margin: 0 0 0.8rem;
  color: var(--c-mint);
  font-family: var(--f-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.3rem;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  border-left: 2px solid transparent;
  background: rgba(7, 20, 29, 0.55);
  color: var(--c-mist);
  text-decoration: none;
  font-size: var(--fs-small);
  white-space: nowrap;
  transition: color var(--dur) var(--ease-out), background var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--c-glow);
  background: var(--c-mint-12);
  border-left-color: var(--c-mint);
  outline: none;
}

.page-about .about-rail__num {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

/* 内容流 */
.page-about .about-flow {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.15rem);
  min-width: 0;
}

.page-about .about-block {
  position: relative;
  min-width: 0;
  padding: clamp(1.3rem, 3.6vw, 2.5rem);
  scroll-margin-top: calc(var(--sk-header-h) + 1.25rem);
  background:
    linear-gradient(180deg, var(--c-mint) 0%, rgba(43, 227, 163, 0) 46%) left top / 3px 100% no-repeat,
    linear-gradient(168deg, rgba(14, 34, 51, 0.95) 0%, rgba(11, 31, 26, 0.92) 100%);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .about-block .eyebrow {
  margin: 0;
  font-family: var(--f-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mint);
}

.page-about .about-block h2 {
  margin: 0.5rem 0 0;
  font-family: var(--f-display);
  font-size: clamp(1.35rem, 3.3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--c-snow);
}

.page-about .about-block__body {
  margin-top: 1rem;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-block p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.95;
  color: var(--c-mist);
}

.page-about .about-block__cta {
  margin-top: 1.15rem !important;
  font-size: 0.9rem !important;
}

.page-about .about-block__cta a {
  color: var(--c-glow);
  text-decoration: none;
  border-bottom: 1px solid var(--c-mint-28);
  padding-bottom: 1px;
}

.page-about .about-block__cta a:hover,
.page-about .about-block__cta a:focus-visible {
  color: var(--c-mint);
  border-bottom-color: var(--c-mint);
}

/* 图 */
.page-about .about-figure {
  margin: 1.35rem 0 0;
  overflow: hidden;
  background: #07141D;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.03);
}

.page-about .about-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure--tag img {
  aspect-ratio: 10 / 7;
}

.page-about .about-figure--band img {
  aspect-ratio: 2 / 1;
}

/* 团队卡片 */
.page-about .about-team-grid {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.page-about .team-card {
  padding: 0.95rem 0.85rem 1.05rem;
  background: rgba(7, 20, 29, 0.72);
  border-top: 2px solid var(--c-mint);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background var(--dur) var(--ease-out);
}

.page-about .team-card:hover {
  background: rgba(14, 34, 51, 0.95);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(1.45rem, 3.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-amber);
  letter-spacing: -0.02em;
}

.page-about .team-card__role {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-snow);
}

.page-about .team-card__desc {
  margin: 0.45rem 0 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--c-mist);
}

/* 版本标签页 */
.page-about .about-versions {
  margin-top: 1.35rem;
}

.page-about .about-versions__tabs {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.45rem;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--c-line);
  background: rgba(7, 20, 29, 0.72);
  color: var(--c-mist);
  font-family: var(--f-body);
  font-size: 0.84rem;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color var(--dur) var(--ease-out), background var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}

.page-about .about-tab:hover {
  color: var(--c-glow);
  border-color: var(--c-mint-28);
}

.page-about .about-tab[aria-selected="true"] {
  background: var(--c-mint);
  border-color: var(--c-mint);
  color: #05201A;
}

.page-about .about-tab:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--c-amber);
}

.page-about .about-tab__year {
  font-family: var(--f-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-versions__panels {
  margin-top: 0.85rem;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-version-panel {
  padding: 1rem 1.05rem;
  background: rgba(7, 20, 29, 0.6);
  border-left: 2px solid var(--c-amber);
}

.page-about .about-version-panel:focus-visible {
  outline: 2px solid var(--c-mint);
  outline-offset: 2px;
}

.page-about .about-version-panel h3 {
  margin: 0 0 0.5rem;
  font-family: var(--f-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-snow);
}

.page-about .about-version-panel p {
  font-size: 0.9rem;
  line-height: 1.9;
}

.page-about .about-version-panel ul {
  margin: 0.65rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.86rem;
  line-height: 1.85;
  color: var(--c-mist);
}

/* 合作网络 */
.page-about .about-network {
  margin-top: 1.35rem;
}

.page-about .about-network__core {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.5rem 0.85rem;
  background: var(--c-mint-12);
  border: 1px solid var(--c-mint-28);
  color: var(--c-snow);
  font-size: 0.86rem;
  line-height: 1.5;
}

.page-about .about-network__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.05rem;
  border-left: 1px dashed var(--c-line);
  display: grid;
  gap: 0.85rem;
}

.page-about .about-network__item {
  position: relative;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-network__item strong {
  color: var(--c-snow);
  font-weight: 600;
}

.page-about .about-network__item::before {
  content: "";
  position: absolute;
  left: -1.05rem;
  top: 0.6rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-mint);
  box-shadow: 0 0 0 3px rgba(43, 227, 163, 0.16);
  transform: translateX(-4px);
}

/* 尾部指引 */
.page-about .about-next {
  padding: clamp(1.2rem, 3.2vw, 1.9rem);
  background: linear-gradient(116deg, rgba(43, 227, 163, 0.16), rgba(255, 194, 75, 0.1) 62%, rgba(7, 20, 29, 0) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--c-snow);
  letter-spacing: 0.01em;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-next__list a {
  display: block;
  padding: 0.6rem 0.8rem;
  background: rgba(7, 20, 29, 0.62);
  border-left: 2px solid var(--c-amber);
  color: var(--c-snow);
  text-decoration: none;
  font-size: 0.86rem;
  line-height: 1.6;
  transition: background var(--dur) var(--ease-out), color var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  background: var(--c-mint-12);
  border-left-color: var(--c-mint);
  color: var(--c-glow);
  outline: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(1.5rem, 4vw, 3.25rem);
  }

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

  .page-about .about-facts li {
    flex-direction: row;
    align-items: baseline;
    gap: 0.8rem;
    padding: 0.75rem 0.85rem;
  }

  .page-about .about-facts__label {
    font-size: 0.8rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-body__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--sk-header-h) + 1.5rem);
  }

  .page-about .about-rail__label {
    display: block;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0.15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__list li {
    flex: initial;
  }

  .page-about .about-rail__link {
    background: transparent;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .team-card,
  .page-about .about-tab,
  .page-about .about-next__list a {
    transition: none;
  }
}
<<<END>>>