.page-about {
  --about-warm: #17142A;
  --about-glow: rgba(123, 77, 255, 0.28);
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
}

.page-about em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  letter-spacing: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(20px, 4vw, 36px) 0 clamp(44px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 620px;
  background:
    radial-gradient(48% 58% at 16% 18%, var(--about-glow), transparent 70%),
    radial-gradient(44% 54% at 86% 6%, rgba(33, 230, 214, 0.18), transparent 72%);
  pointer-events: none;
  z-index: -2;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 36, 64, 0.85) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 36, 64, 0.85) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 78%);
  opacity: 0.55;
  pointer-events: none;
  z-index: -1;
}

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

.page-about .about-hero .crumbs {
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__title {
  font-size: clamp(34px, 7.4vw, 72px);
  line-height: 1.06;
  margin: 12px 0 0;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__stats li {
  background: var(--panel);
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__num {
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 骨架：左侧刻度轴 + 右侧长卷 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding-bottom: clamp(56px, 8vw, 100px);
}

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

.page-about .about-flow {
  min-width: 0;
  display: grid;
  gap: clamp(56px, 8vw, 96px);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-about .about-sec__head {
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-sec__eyebrow {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-about .about-sec__title {
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.24;
  margin: 0;
  max-width: 20em;
}

.page-about .about-text {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-text--dark {
  color: rgba(23, 20, 42, 0.72);
}

.page-about .about-figure {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  margin: 0 0 clamp(28px, 4vw, 40px);
  aspect-ratio: 1400 / 700;
}

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

/* ---------- 沿革轴 ---------- */
.page-about .about-axis {
  list-style: none;
  margin: 0 0 0 6px;
  padding: 0 0 0 clamp(18px, 3vw, 30px);
  border-left: 1px solid var(--line);
}

.page-about .about-axis__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-bottom: clamp(26px, 4vw, 40px);
}

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

.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 3vw, 30px) - 5px);
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(123, 77, 255, 0.16);
}

.page-about .about-axis__item:last-child::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33, 230, 214, 0.18);
}

.page-about .about-axis__year {
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.1;
  color: var(--neon-soft);
}

.page-about .about-axis__info h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-axis__info p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 分工 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 32px);
  align-items: start;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__list li {
  background: var(--panel);
  padding: 20px 20px 22px;
}

.page-about .about-team__list h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--cyan);
}

.page-about .about-team__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4 / 3;
}

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

.page-about .about-diagram-wrap {
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(16px, 3vw, 26px);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(21, 18, 40, 0.55);
}

.page-about .about-diagram__cap {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-diagram {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 四条内容线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-line {
  padding: 22px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.page-about .about-line::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--neon);
}

.page-about .about-line--cyan::after {
  background: var(--cyan);
}

.page-about .about-line--gold::after {
  background: var(--gold);
}

.page-about .about-line--signal::after {
  background: var(--signal);
}

.page-about .about-line__k {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-line h3 {
  margin: 0;
  font-size: 18px;
  color: var(--cream);
}

.page-about .about-line__num {
  margin: 0;
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-line--cyan .about-line__num {
  color: var(--cyan);
}

.page-about .about-line--gold .about-line__num {
  color: var(--neon-soft);
}

.page-about .about-line--signal .about-line__num {
  color: var(--signal);
}

.page-about .about-line > p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-lines__figure {
  margin: 6px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 1 / 1;
}

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

/* ---------- 版本演进（浅色编辑块） ---------- */
.page-about .about-editorial {
  background: var(--cream);
  color: var(--about-warm);
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(24px, 4.5vw, 44px) clamp(18px, 4vw, 40px);
  box-shadow: 0 24px 60px -40px rgba(123, 77, 255, 0.8);
}

.page-about .about-editorial .about-sec__title {
  color: var(--about-warm);
}

.page-about .about-editorial .about-sec__eyebrow {
  color: #6B3BE0;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.page-about .about-filter__btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(23, 20, 42, 0.24);
  background: transparent;
  color: var(--about-warm);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-about .about-filter__btn:hover,
.page-about .about-filter__btn:focus-visible {
  background: var(--about-warm);
  color: var(--cream);
  border-color: var(--about-warm);
  outline: none;
}

.page-about .about-tablewrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 12px;
  border: 1px solid rgba(23, 20, 42, 0.16);
}

.page-about .about-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}

.page-about .about-table thead th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 12px 14px;
  color: rgba(23, 20, 42, 0.7);
  border-bottom: 1px solid rgba(23, 20, 42, 0.22);
  background: rgba(23, 20, 42, 0.05);
  white-space: nowrap;
}

.page-about .about-table tbody th,
.page-about .about-table tbody td {
  padding: 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(23, 20, 42, 0.1);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: none;
}

.page-about .about-table tbody tr:nth-child(even) {
  background: rgba(23, 20, 42, 0.035);
}

.page-about .about-table tbody td {
  color: rgba(23, 20, 42, 0.82);
}

.page-about .about-vtag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--about-warm);
  white-space: nowrap;
}

.page-about .about-vtag::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
}

.page-about .about-vtag--v2::before {
  background: var(--cyan);
}

.page-about .about-vtag--v3::before {
  background: #E0A21F;
}

.page-about .about-vtag--v4::before {
  background: var(--signal);
}

/* ---------- 维护机制 ---------- */
.page-about .about-upkeep {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-upkeep__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-upkeep__tag {
  display: inline-block;
  align-self: start;
  justify-self: start;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid rgba(255, 198, 92, 0.4);
  border-radius: 999px;
  padding: 4px 12px;
}

.page-about .about-upkeep__body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--cream);
}

.page-about .about-upkeep__body p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 访客结构 ---------- */
.page-about .about-audience {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-audience__stat {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(123, 77, 255, 0.16), rgba(21, 18, 40, 0.9) 62%);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-audience__stat--cyan {
  background: linear-gradient(160deg, rgba(33, 230, 214, 0.14), rgba(21, 18, 40, 0.9) 62%);
}

.page-about .about-audience__stat--gold {
  background: linear-gradient(160deg, rgba(255, 198, 92, 0.16), rgba(21, 18, 40, 0.9) 62%);
}

.page-about .about-audience__num {
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1;
  color: var(--neon-soft);
}

.page-about .about-audience__stat--cyan .about-audience__num {
  color: var(--cyan);
}

.page-about .about-audience__stat--gold .about-audience__num {
  color: var(--gold);
}

.page-about .about-audience__unit {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-audience__stat p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(26px, 5vw, 44px) clamp(20px, 4vw, 40px);
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(33, 230, 214, 0.16), transparent 68%),
    radial-gradient(70% 110% at 0% 100%, rgba(123, 77, 255, 0.22), transparent 70%),
    var(--ink-deep);
}

.page-about .about-cta__k {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.25;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 14px 0 26px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

  .page-about .about-axis__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-upkeep__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 720px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-lines__figure {
    grid-column: 1 / -1;
    aspect-ratio: 16 / 9;
    margin-top: 10px;
  }

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

  .page-about .about-line:nth-child(even) {
    transform: translateY(16px);
  }
}

@media (min-width: 960px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: stretch;
  }

  .page-about .about-team__figure {
    aspect-ratio: auto;
    height: 100%;
    min-height: 320px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-rail__title {
    margin: 0 0 16px;
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--mist);
  }

  .page-about .about-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    display: grid;
    gap: 2px;
  }

  .page-about .about-rail__list::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: var(--line);
  }

  .page-about .about-rail__link {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 8px 0 8px 20px;
    font-size: 13px;
    color: var(--mist);
    text-decoration: none;
    transition: color 160ms ease;
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 9px;
    height: 2px;
    background: var(--line);
    transform: translateY(-50%);
    transition: background 160ms ease, width 160ms ease;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    color: var(--cream);
    outline: none;
  }

  .page-about .about-rail__link[aria-current="true"] {
    color: var(--cyan);
  }

  .page-about .about-rail__link[aria-current="true"]::before {
    background: var(--cyan);
    width: 14px;
  }

  .page-about .about-rail__idx {
    font-size: 10px;
    color: rgba(185, 179, 206, 0.6);
  }

  .page-about .about-rail__stamp {
    margin: 26px 0 0;
    font-size: 10px;
    line-height: 1.8;
    letter-spacing: 0.12em;
    color: rgba(185, 179, 206, 0.5);
  }
}

@media (min-width: 1280px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-line:nth-child(even) {
    transform: translateY(24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-rail__link::before,
  .page-about .about-filter__btn {
    transition: none;
  }

  .page-about .about-line:nth-child(even) {
    transform: none;
  }
}
<<<END>>>