.page-about {
  overflow-wrap: break-word;
  background: var(--night);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding-top: clamp(1rem, 2.4vw, 1.6rem);
  font-size: var(--fs-note);
  color: var(--sage);
}

.page-about .breadcrumb a {
  color: var(--sage);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--neon);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(2.6rem, 7vw, 5.4rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(79, 224, 164, .10) 0%, rgba(79, 224, 164, 0) 58%),
    linear-gradient(165deg, var(--night) 0%, var(--ink) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(79, 224, 164, .045) 0 2px, transparent 2px 72px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.4rem);
  margin-top: clamp(1.6rem, 4vw, 3rem);
}

.page-about .about-hero__title {
  margin: 0 0 1.05rem;
  font-size: var(--fs-display);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--warm);
  max-width: 17ch;
}

.page-about .about-hero__lede {
  color: var(--silver);
  max-width: 46ch;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 2rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding-left: .9rem;
  border-left: 2px solid var(--neon);
  font-size: var(--fs-note);
  color: var(--sage);
}

/* ---------- 首屏图表 ---------- */
.page-about .about-hero__chart {
  padding: clamp(1rem, 3vw, 1.8rem);
  background: rgba(5, 29, 23, .6);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

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

.page-about .about-chart__grid {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-chart__bar {
  fill: rgba(79, 224, 164, .16);
}

.page-about .about-chart__bar--last {
  fill: rgba(79, 224, 164, .34);
}

.page-about .about-chart__line {
  fill: none;
  stroke: var(--neon);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-about .about-chart__dot {
  fill: var(--ink);
  stroke: var(--neon);
  stroke-width: 2;
}

.page-about .about-chart__dot--last {
  fill: var(--neon);
}

.page-about .about-chart__label {
  fill: var(--sage);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

/* ---------- 通用小节头 ---------- */
.page-about .about-head {
  max-width: 64ch;
  margin-bottom: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-head .h2 {
  margin: .6rem 0 .9rem;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-service {
  padding: clamp(1.3rem, 3vw, 2.1rem);
  background: rgba(10, 58, 44, .55);
}

.page-about .about-service__no {
  display: block;
  margin-bottom: .6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .22em;
  color: var(--neon);
}

.page-about .about-service .h3 {
  margin: 0 0 .6rem;
}

.page-about .about-service p {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-origin__figure {
  margin: clamp(1.8rem, 4vw, 3rem) 0 0;
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.85) brightness(.85);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-origin__figure figcaption {
  margin-top: .8rem;
  font-size: var(--fs-note);
  color: var(--sage);
}

/* ---------- 02 工序 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.8rem, 4vw, 3rem);
}

.page-about .about-team__steps {
  position: relative;
  margin: 1.8rem 0 0;
  padding: 0 0 0 2.2rem;
  list-style: none;
}

.page-about .about-team__steps::before {
  content: "";
  position: absolute;
  left: .58rem;
  top: .75rem;
  bottom: .5rem;
  border-left: 1px dashed var(--line-neon);
}

.page-about .about-team__steps li {
  position: relative;
  padding-bottom: 1.3rem;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--silver);
}

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

.page-about .about-team__steps li::before {
  content: "";
  position: absolute;
  left: -1.92rem;
  top: .55rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(79, 224, 164, .14);
}

.page-about .about-team__steps strong {
  color: var(--warm);
  font-weight: 700;
  margin-right: .35rem;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.8) brightness(.82);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
}

.page-about .about-team__figure figcaption {
  margin-top: .85rem;
  font-size: var(--fs-note);
  color: var(--sage);
}

/* ---------- 03 版本 ---------- */
.page-about .about-versions__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3vw, 2.6rem);
}

.page-about .about-versions__rail {
  display: none;
  margin: 0;
  padding: 0;
  list-style: none;
  align-self: start;
  position: sticky;
  top: 7rem;
}

.page-about .about-versions__rail li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 2.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: .16em;
  color: var(--sage);
}

.page-about .about-versions__rail li:last-child {
  margin-bottom: 0;
  color: var(--neon);
}

.page-about .about-versions__rail li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .35em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--line-neon);
  background: var(--ink);
}

.page-about .about-versions__rail li:last-child::before {
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 0 4px rgba(79, 224, 164, .16);
}

.page-about .about-version {
  position: relative;
  padding: 0 0 clamp(1.7rem, 3.6vw, 2.5rem) clamp(1.1rem, 2.4vw, 1.8rem);
  border-left: 1px dashed var(--line-neon);
}

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

.page-about .about-version::before {
  content: "";
  position: absolute;
  left: -5px;
  top: .42rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--neon);
}

.page-about .about-version__k {
  display: inline-block;
  margin-bottom: .55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .2em;
  color: var(--amber);
}

.page-about .about-version .h3 {
  margin: 0 0 .55rem;
  color: var(--warm);
}

.page-about .about-version p {
  margin: 0;
  max-width: 62ch;
  color: var(--silver);
}

/* ---------- 04 覆盖 ---------- */
.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(245, 239, 228, .16);
  border: 1px solid rgba(245, 239, 228, .16);
}

.page-about .about-scale__cell {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: clamp(1rem, 2.6vw, 1.7rem) clamp(.9rem, 2.2vw, 1.4rem);
  background: rgba(5, 29, 23, .48);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 6.2vw, 2.6rem);
  line-height: 1;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--warm);
}

.page-about .about-scale__k {
  font-size: var(--fs-label);
  letter-spacing: .14em;
  color: var(--sage);
}

.page-about .about-scale__figure {
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
}

.page-about .about-scale__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: .55;
  filter: saturate(.7);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

/* ---------- 05 协作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.4vw, 1.6rem);
}

.page-about .about-partner {
  padding: clamp(1.3rem, 2.8vw, 1.9rem);
  background: rgba(5, 29, 23, .52);
  border-top: 2px solid var(--neon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-partner__num {
  margin: .85rem 0 .55rem;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--warm);
}

.page-about .about-partner p:last-child {
  margin: 0;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-partners__honor {
  margin: clamp(1.6rem, 3.6vw, 2.4rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--amber);
  font-size: var(--fs-note);
  color: var(--silver);
}

/* ---------- 06 归属 ---------- */
.page-about .about-site__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
}

.page-about .about-site__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-site__facts > div {
  display: grid;
  gap: .3rem;
  padding: 1rem 1.15rem;
  background: rgba(10, 58, 44, .5);
}

.page-about .about-site__facts dt {
  font-size: var(--fs-label);
  letter-spacing: .16em;
  color: var(--sage);
}

.page-about .about-site__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--warm);
}

/* ---------- 收尾 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: 1rem;
  max-width: 70ch;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: .7rem;
}

/* ---------- 进场动画 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-site__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 800px) {
  .page-about .about-origin__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-about .about-team__grid {
    grid-template-columns: 6fr 5fr;
    align-items: start;
  }

  .page-about .about-versions__grid {
    grid-template-columns: 4.6rem minmax(0, 1fr);
  }

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

  .page-about .about-site__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-versions__grid {
    gap: 3.4rem;
  }
}
<<<END>>>