.page-about {
  --about-body: #C9D9D0;
  --about-quiet: #5C7A6E;
  background: var(--ink-950);
  color: var(--paper-50);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 52px;
  display: block;
}
.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  opacity: .5;
}
.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4,18,15,.62) 0%, rgba(4,18,15,.34) 42%, var(--ink-950) 100%),
    radial-gradient(120% 82% at 18% 26%, rgba(43,232,165,.18), transparent 62%);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--text-mute);
  margin-bottom: 28px;
}
.page-about .breadcrumb a {
  color: var(--pulse-200);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}
.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  color: var(--pulse-200);
}
.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 9vw, 82px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--paper-50);
  text-shadow: 0 2px 40px rgba(4,18,15,.55);
}
.page-about .about-hero__lede {
  max-width: 34em;
  margin: 0 0 30px;
  color: var(--about-body);
  font-size: 16px;
  line-height: 1.75;
}
.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 620px;
}
.page-about .about-hero__stats li {
  background: rgba(8,32,27,.72);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-data);
  padding: 12px 10px;
  backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-hero__stat-num {
  font-size: clamp(18px, 4vw, 26px);
  font-weight: 700;
  color: var(--pulse-500);
  line-height: 1;
}
.page-about .about-hero__stat-label {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--text-mute);
  line-height: 1.5;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-intro {
  border-top: 1px solid var(--ink-700);
}
.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about .about-intro__head .h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
}
.page-about .about-quote {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--amber-500);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 6vw, 40px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--paper-50);
}
.page-about .about-intro__body .prose p {
  margin: 0 0 14px;
  color: var(--about-body);
  font-size: 16px;
  line-height: 1.75;
}
.page-about .about-intro__body .btn {
  margin-top: 6px;
}

/* ---------- 版本时间线 ---------- */
.page-about .about-versions {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--ink-700);
}
.page-about .about-versions__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  pointer-events: none;
}
.page-about .about-versions .wrap {
  position: relative;
  z-index: 1;
}
.page-about .about-versions__sub {
  margin: 10px 0 0;
  color: var(--text-mute);
  font-size: 15px;
  max-width: 30em;
}
.page-about .tl {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  position: relative;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--ink-700) 0%, var(--ink-700) 42%, var(--pulse-500) 100%);
}
.page-about .tl__item {
  position: relative;
  padding-left: 50px;
  margin-bottom: 16px;
}
.page-about .tl__index {
  position: absolute;
  left: 0;
  top: 14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  background: var(--ink-950);
  border: 2px solid var(--ink-700);
  color: var(--text-mute);
}
.page-about .tl__item:nth-child(2) .tl__index {
  border-color: rgba(43,232,165,.45);
  color: var(--pulse-200);
}
.page-about .tl__item:nth-child(3) .tl__index {
  border-color: var(--pulse-500);
  color: var(--pulse-500);
}
.page-about .tl__item:nth-child(4) .tl__index {
  background: var(--pulse-500);
  border-color: var(--pulse-500);
  color: var(--ink-950);
  font-weight: 700;
}
.page-about .tl__card {
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-content);
  padding: 18px 18px 16px;
}
.page-about .tl__item:nth-child(2) .tl__card {
  background: #0A2620;
}
.page-about .tl__item:nth-child(3) .tl__card {
  background: #0C2C25;
}
.page-about .tl__item:nth-child(4) .tl__card {
  background: linear-gradient(140deg, #12433A 0%, #0C2C25 100%);
  border-color: rgba(43,232,165,.5);
}
.page-about .tl__ver {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--pulse-200);
}
.page-about .tl__card .h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -.01em;
  color: var(--paper-50);
}
.page-about .tl__text {
  margin: 0 0 14px;
  color: var(--about-body);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 编辑台 ---------- */
.page-about .about-desk {
  border-top: 1px solid var(--ink-700);
}
.page-about .about-desk__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}
.page-about .about-desk__fig {
  margin: 0;
  border-radius: var(--radius-content);
  overflow: hidden;
  border: 1px solid var(--ink-700);
  position: relative;
}
.page-about .about-desk__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}
.page-about .about-desk__fig figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 16px 12px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--paper-50);
  background: linear-gradient(180deg, transparent, rgba(4,18,15,.86));
}
.page-about .about-desk__body .h2 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
}
.page-about .about-desk__body .prose p {
  margin: 0 0 14px;
  color: var(--about-body);
  font-size: 16px;
  line-height: 1.75;
}
.page-about .about-desk__roles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 22px;
}
.page-about .about-desk__roles .chip {
  background: rgba(43,232,165,.1);
  border: 1px solid rgba(43,232,165,.35);
  color: var(--pulse-200);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: .08em;
}

/* ---------- 数据来源 ---------- */
.page-about .about-source {
  background: var(--ink-900);
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
}
.page-about .about-source__sub {
  margin: 10px 0 0;
  color: var(--text-mute);
  font-size: 15px;
  max-width: 32em;
}
.page-about .about-source__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-source__card {
  background: var(--ink-950);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-content);
  padding: 20px 18px;
}
.page-about .about-source__no {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber-500);
}
.page-about .about-source__card .h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--paper-50);
}
.page-about .about-source__card p:last-child {
  margin: 0;
  color: var(--about-body);
  font-size: 15px;
  line-height: 1.7;
}
.page-about .about-source__foot {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--pulse-500);
  background: rgba(43,232,165,.06);
  border-radius: 0 var(--radius-data) var(--radius-data) 0;
  color: var(--pulse-200);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 数字墙 ---------- */
.page-about .about-scale__sub {
  margin: 10px 0 0;
  color: var(--text-mute);
  font-size: 15px;
}
.page-about .dw {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}
.page-about .dw__item {
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-data);
  padding: 16px 14px;
  position: relative;
}
.page-about .dw__item[open] {
  border-color: rgba(43,232,165,.45);
}
.page-about .dw__item--flag {
  grid-column: span 2;
}
.page-about .dw__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  padding-right: 22px;
}
.page-about .dw__item summary::-webkit-details-marker {
  display: none;
}
.page-about .dw__item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--text-mute);
}
.page-about .dw__item[open] summary::after {
  content: "−";
  color: var(--pulse-500);
}
.page-about .dw__num {
  font-size: clamp(28px, 7vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--paper-50);
}
.page-about .dw__unit {
  font-size: .46em;
  margin-left: 3px;
  color: var(--text-mute);
}
.page-about .dw__label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--text-mute);
}
.page-about .dw__desc {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--ink-700);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-body);
}
.page-about .dw__item--flag {
  background: linear-gradient(140deg, var(--amber-500) 0%, #FF8F2B 100%);
  border-color: transparent;
}
.page-about .dw__item--flag .dw__num {
  color: #08150F;
  font-size: clamp(44px, 12vw, 84px);
}
.page-about .dw__item--flag .dw__unit {
  color: rgba(8,21,15,.7);
}
.page-about .dw__item--flag .dw__label {
  color: rgba(8,21,15,.78);
  font-weight: 500;
}
.page-about .dw__item--flag summary::after {
  color: rgba(8,21,15,.7);
}
.page-about .dw__item--flag[open] summary::after {
  color: #08150F;
}
.page-about .dw__item--flag .dw__desc {
  color: #08150F;
  border-top-color: rgba(8,21,15,.28);
}

/* ---------- 内容节奏（浅底） ---------- */
.page-about .section--paper {
  background: var(--paper-50);
  color: var(--text-dark);
}
.page-about .section--paper .eyebrow {
  color: var(--about-quiet);
}
.page-about .section--paper .h2 {
  color: var(--text-dark);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
  margin: 10px 0 0;
}
.page-about .about-cadence__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-cadence__card {
  background: #FFFFFF;
  border: 1px solid var(--paper-200);
  border-radius: var(--radius-content);
  padding: 20px 18px;
}
.page-about .about-cadence__no {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber-700);
  font-weight: 500;
}
.page-about .about-cadence__card .h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text-dark);
}
.page-about .about-cadence__card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: #2B4038;
}
.page-about .about-cadence__link {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--amber-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(178,106,5,.45);
  padding-bottom: 2px;
}
.page-about .about-cadence__link:hover {
  color: var(--text-dark);
  border-bottom-color: var(--text-dark);
}

/* ---------- 图片墙 ---------- */
.page-about .about-wall {
  border-top: 1px solid var(--ink-700);
}
.page-about .wall {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}
.page-about .wall__fig {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-content);
  border: 1px solid var(--ink-700);
  position: relative;
  background: var(--ink-900);
}
.page-about .wall__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  transition: transform .35s ease;
}
.page-about .wall__fig--a img {
  aspect-ratio: 4 / 5;
}
.page-about .wall__fig--b img {
  aspect-ratio: 3 / 2;
}
.page-about .wall__fig--c img {
  aspect-ratio: 1 / 1;
}
.page-about .wall__fig:hover img {
  transform: scale(1.03);
}
.page-about .wall__fig figcaption {
  padding: 10px 14px 14px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--text-mute);
}
.page-about .about-wall__cta {
  margin-top: 26px;
  padding: 22px 18px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-content);
  background: rgba(23,74,63,.34);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .about-wall__cta p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--paper-50);
}
.page-about .about-wall__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 100px 0 76px;
  }
  .page-about .about-intro__grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
  .page-about .about-source__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-cadence__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .wall__fig--b {
    margin-top: 26px;
  }
  .page-about .wall__fig--c {
    margin-top: 52px;
  }
  .page-about .tl {
    margin-top: 40px;
  }
  .page-about .tl__item {
    padding-left: 64px;
    margin-bottom: 20px;
  }
  .page-about .tl__card {
    padding: 22px 24px 20px;
  }
  .page-about .about-wall__cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
  }
}

@media (min-width: 960px) {
  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 44px;
    align-items: center;
  }
  .page-about .dw {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
  }
  .page-about .dw__item--flag {
    grid-column: span 3;
    grid-row: span 2;
    padding: 24px 22px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .page-about .dw__item:nth-child(2) {
    grid-column: span 3;
  }
  .page-about .dw__item:nth-child(3) {
    grid-column: span 3;
  }
  .page-about .dw__item:nth-child(4),
  .page-about .dw__item:nth-child(5),
  .page-about .dw__item:nth-child(6) {
    grid-column: span 2;
  }
  .page-about .tl__card .h3 {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .wall__fig img {
    transition: none;
  }
  .page-about .wall__fig:hover img {
    transform: none;
  }
}
<<<END>>>