.page-about {
  background:
    radial-gradient(120% 80% at 84% -10%, rgba(198, 255, 61, .12), transparent 58%),
    radial-gradient(90% 70% at 6% 10%, rgba(53, 224, 208, .08), transparent 62%),
    linear-gradient(180deg, var(--night-blue) 0%, var(--night-blue) 58%, var(--deep-green) 100%);
  color: var(--warm-white);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  margin: 0 0 clamp(1.5rem, 4vw, 2.75rem);
  padding: 0;
  list-style: none;
  font-size: .8rem;
  letter-spacing: .08em;
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  color: var(--warm-white);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--mid-blue);
  margin-right: .1rem;
}

.page-about .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  align-items: end;
}

.page-about .about-hero__lead .micro-label {
  display: inline-block;
  margin: 0 0 1rem;
  font-size: .7rem;
  letter-spacing: .3em;
  color: var(--lime);
}

.page-about .about-hero__lead .h-display {
  margin: 0;
  font-size: clamp(2.25rem, 7.2vw, 4.6rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-about .about-hero__desc {
  margin: 1.25rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 241, 232, .8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__stats {
  display: grid;
  gap: 1rem;
}

.page-about .about-hero__stat {
  padding-top: .85rem;
  border-top: var(--line);
}

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

.page-about .stat__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.1rem, 7vw, 3.2rem);
  font-weight: 700;
  line-height: .95;
  letter-spacing: .01em;
  color: var(--warm-white);
  font-variant-numeric: tabular-nums;
}

.page-about .stat__num--xl {
  font-size: clamp(3.2rem, 12vw, 5.2rem);
  color: var(--lime);
}

.page-about .about-hero__stat:nth-child(2) .stat__num {
  color: var(--beat-orange);
}

.page-about .about-hero__stat:nth-child(3) .stat__num {
  color: var(--pulse-cyan);
}

.page-about .stat__label {
  display: block;
  margin-top: .45rem;
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-hero__figure {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
}

.page-about .about-hero__frame {
  aspect-ratio: 16 / 8.6;
  border: var(--line-strong);
  box-shadow: var(--hard-shadow);
  overflow: hidden;
  background: var(--pitch-green);
}

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

.page-about .figure__caption {
  margin-top: .75rem;
  font-size: .82rem;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 展览式章节 ---------- */
.page-about .exhibit {
  padding-bottom: clamp(1rem, 3vw, 2rem);
}

.page-about .exhibit__sec {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 1.75rem);
  padding: clamp(2rem, 5vw, 3.25rem) 0;
  border-top: var(--line);
}

.page-about .exhibit__sec::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--mid-blue), rgba(30, 58, 95, .2));
}

.page-about .axis-num {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding-left: 1.1rem;
}

.page-about .axis-num__big {
  font-family: var(--font-num);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .03em;
  color: var(--mist);
  transition: color var(--ease);
}

.page-about .axis-num__note {
  font-size: .66rem;
  letter-spacing: .3em;
  color: var(--mist);
  transition: color var(--ease);
}

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

.page-about .exhibit__body .h-section {
  margin: 0;
  font-size: clamp(1.55rem, 4.2vw, 2.35rem);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-about .exhibit__text {
  margin: .95rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 241, 232, .78);
}

.page-about .exhibit__quote {
  margin: 1.5rem 0 0;
  padding: .35rem 0 .35rem 1.25rem;
  border-left: 5px solid var(--beat-orange);
}

.page-about .exhibit__quote p {
  margin: 0;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: -.01em;
  color: var(--warm-white);
}

.page-about .exhibit__pause {
  height: clamp(2rem, 6vw, 4.5rem);
  border-top: var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(30, 58, 95, .55) 0 2px, transparent 2px 46px);
}

/* ---------- 内容方法 ---------- */
.page-about .method {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: 1.6rem;
}

.page-about .method__steps {
  display: grid;
  gap: .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .method__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .9rem;
  padding: 1rem 1rem 1.1rem;
  background: var(--pitch-green);
  border: var(--line);
  border-left: 6px solid var(--mid-blue);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .method__step:nth-child(2) {
  border-left-color: var(--pulse-cyan);
}

.page-about .method__step:nth-child(3) {
  border-left-color: var(--beat-orange);
}

.page-about .method__num {
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .method__step .h-card {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--warm-white);
}

.page-about .method__step p {
  margin: .45rem 0 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(244, 241, 232, .76);
}

.page-about .method__figure {
  margin: 0;
}

.page-about .method__frame {
  aspect-ratio: 3 / 2;
  border: var(--line-strong);
  box-shadow: var(--hard-shadow);
  overflow: hidden;
  background: var(--deep-green);
}

.page-about .method__frame img,
.page-about .era-figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 版本时间轴 ---------- */
.page-about .era {
  margin-top: 1.75rem;
}

.page-about .era__label {
  display: inline-block;
  margin: 0 0 .9rem;
  font-size: .66rem;
  letter-spacing: .3em;
  color: var(--beat-orange);
}

.page-about .era__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(238px, 1fr);
  gap: 1rem;
  margin: 0;
  padding: .25rem .25rem 1.25rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .era__node {
  scroll-snap-align: start;
  padding: 1.1rem 1.1rem 1.25rem;
  background: var(--pitch-green);
  border: var(--line);
  box-shadow: var(--hard-shadow-sm);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .era__node:hover {
  border-color: var(--lime);
  transform: translateY(-3px);
}

.page-about .era__node--now {
  border: 3px solid var(--lime);
  box-shadow: 6px 6px 0 var(--shadow-ink);
  background: linear-gradient(160deg, rgba(198, 255, 61, .12), transparent 62%), var(--pitch-green);
}

.page-about .era__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-about .era__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--beat-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, .18);
  flex: none;
}

.page-about .era__node--now .era__dot {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 61, .2);
}

.page-about .era__ver {
  font-family: var(--font-num);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--beat-orange);
}

.page-about .era__node--now .era__ver {
  color: var(--lime);
}

.page-about .era__season {
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .era__node .tag {
  font-size: .68rem;
  letter-spacing: .12em;
}

.page-about .era__title {
  margin: .85rem 0 0;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--warm-white);
}

.page-about .era__text {
  margin: .5rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(244, 241, 232, .74);
}

.page-about .era-figure {
  display: grid;
  gap: .6rem;
  margin: 1.5rem 0 0;
}

.page-about .era-figure__frame {
  aspect-ratio: 3 / 4;
  border: var(--line);
  box-shadow: var(--hard-shadow-sm);
  overflow: hidden;
  background: var(--deep-green);
}

.page-about .era-figure .figure__caption {
  margin: 0;
  align-self: end;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  gap: .85rem;
  margin-top: 1.6rem;
}

.page-about .crew__bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: .3rem .9rem;
  width: 100%;
  padding: .95rem 1.1rem;
  background: var(--pitch-green);
  border: var(--line);
  border-left: 6px solid var(--mid-blue);
  box-shadow: var(--hard-shadow-sm);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}

.page-about .crew__bar--edit {
  border-left-color: var(--lime);
}

.page-about .crew__bar--check {
  border-left-color: var(--pulse-cyan);
}

.page-about .crew__bar--build {
  border-left-color: var(--beat-orange);
}

.page-about .crew__bar:hover,
.page-about .crew__bar:focus-visible {
  border-color: var(--lime);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--shadow-ink);
  outline: none;
}

.page-about .crew__count {
  grid-row: span 2;
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .crew__bar--check .crew__count {
  color: var(--pulse-cyan);
}

.page-about .crew__bar--build .crew__count {
  color: var(--beat-orange);
}

.page-about .crew__name {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .crew__duty {
  font-size: .88rem;
  line-height: 1.65;
  color: var(--mist);
  transition: color var(--ease);
}

.page-about .crew__bar:hover .crew__duty,
.page-about .crew__bar:focus-visible .crew__duty {
  color: var(--warm-white);
}

/* ---------- 使用场景 ---------- */
.page-about .scene-list {
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .scene-list__item {
  border-bottom: var(--line);
}

.page-about .scene-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .35rem 1rem;
  align-items: start;
  padding: 1.15rem 1rem;
  text-decoration: none;
  color: var(--warm-white);
  transition: background-color var(--ease), box-shadow var(--ease);
}

.page-about .scene-row:hover,
.page-about .scene-row:focus-visible {
  background: rgba(198, 255, 61, .07);
  box-shadow: inset 0 0 0 2px var(--lime);
  outline: none;
}

.page-about .index-list__num {
  padding-top: .1rem;
  font-family: var(--font-num);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--beat-orange);
}

.page-about .scene-row__body {
  display: grid;
  gap: .32rem;
  min-width: 0;
}

.page-about .index-list__title {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .index-list__meta {
  font-size: .9rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .scene-row__go {
  display: none;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .scene-row:hover .scene-row__go {
  transform: translateX(3px);
}

/* ---------- 联赛协作 ---------- */
.page-about .league {
  margin-top: 1.6rem;
  gap: 1rem;
}

.page-about .league__card {
  padding: 1.4rem;
  background: var(--pitch-green);
  border: var(--line-strong);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .league__card .tag {
  font-size: .7rem;
  letter-spacing: .12em;
}

.page-about .league__card .h-card {
  margin: .8rem 0 0;
  font-size: 1.1rem;
  font-weight: 900;
  line-height: 1.35;
  color: var(--warm-white);
}

.page-about .league__card p {
  margin: .6rem 0 0;
  font-size: .9rem;
  line-height: 1.72;
  color: rgba(244, 241, 232, .74);
}

.page-about .league__list {
  display: grid;
  gap: .55rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .league__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .87rem;
  line-height: 1.65;
  color: rgba(244, 241, 232, .82);
}

.page-about .league__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 7px;
  height: 7px;
  background: var(--beat-orange);
}

/* ---------- 收尾行动 ---------- */
.page-about .about-cta {
  padding: clamp(2.25rem, 6vw, 4rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-about .about-cta__box {
  padding: clamp(1.6rem, 4.5vw, 2.75rem);
  border: var(--line-strong);
  background:
    linear-gradient(135deg, rgba(198, 255, 61, .14), rgba(10, 26, 47, 0) 62%),
    var(--pitch-green);
  box-shadow: var(--hard-shadow);
}

.page-about .about-cta__box .micro-label {
  display: inline-block;
  margin: 0 0 .8rem;
  font-size: .68rem;
  letter-spacing: .3em;
  color: var(--lime);
}

.page-about .about-cta__box .h-section {
  margin: 0;
  font-size: clamp(1.6rem, 4.6vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-about .about-cta__desc {
  margin: .9rem 0 0;
  max-width: 58ch;
  font-size: .96rem;
  line-height: 1.8;
  color: rgba(244, 241, 232, .8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 760px) {
  .page-about .scene-row {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    padding: 1.25rem 1.1rem;
  }

  .page-about .scene-row__go {
    display: inline-block;
    transition: transform var(--ease);
  }

  .page-about .era-figure {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: end;
    gap: 1.25rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .82fr);
  }

  .page-about .exhibit__sec {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: clamp(1.5rem, 3.5vw, 2.75rem);
  }

  .page-about .axis-num {
    position: sticky;
    top: 6.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: .7rem;
    padding-left: 1.1rem;
  }

  .page-about .axis-num__note {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .34em;
    padding-top: .25rem;
  }

  .page-about .exhibit__sec.is-current .axis-num__big {
    color: var(--lime);
  }

  .page-about .exhibit__sec.is-current .axis-num__note {
    color: var(--warm-white);
  }

  .page-about .crew__bar--edit {
    width: 100%;
  }

  .page-about .crew__bar--check {
    width: 64%;
  }

  .page-about .crew__bar--build {
    width: 61%;
  }
}

@media (min-width: 1000px) {
  .page-about .method {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .era__node,
  .page-about .crew__bar,
  .page-about .scene-row,
  .page-about .scene-row__go,
  .page-about .axis-num__big {
    transition: none;
  }

  .page-about .era__node:hover,
  .page-about .crew__bar:hover,
  .page-about .scene-row:hover .scene-row__go {
    transform: none;
  }
}
<<<END>>>