.page-about {
  --about-card: var(--night-800);
  --about-line: var(--line-700);
  --about-gap: clamp(18px, 3vw, 32px);
  background: var(--night-900);
  color: var(--ice-050);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.9;
  padding-bottom: clamp(36px, 6vw, 72px);
  overflow-x: hidden;
}

.page-about a {
  color: inherit;
}

.page-about__crumb {
  padding-top: clamp(14px, 2.4vw, 26px);
  padding-bottom: clamp(10px, 1.6vw, 16px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(34px, 5vw, 62px);
  background:
    radial-gradient(circle at 84% 14%, rgba(29, 187, 122, 0.20), transparent 58%),
    radial-gradient(circle at 6% 92%, rgba(201, 255, 74, 0.10), transparent 52%),
    linear-gradient(180deg, var(--night-900) 0%, var(--night-800) 100%);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(155, 179, 173, 0.07) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(155, 179, 173, 0.07) 0 1px, transparent 1px 64px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: end;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pitch-400);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 7vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-hero__text {
  margin: 0 0 14px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ice-050);
}

.page-about .about-hero__text--dim {
  color: var(--slate-300);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 13px 11px;
  background: var(--night-800);
}

.page-about .about-figures__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--lime-300);
}

.page-about .about-figures__unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--pitch-400);
}

.page-about .about-figures__label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-300);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  border-radius: var(--radius-m);
  border: 1px solid var(--about-line);
  overflow: hidden;
  background: var(--night-800);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(201, 255, 74, 0.10), transparent 46%, rgba(5, 19, 26, 0.72));
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-about .about-hero__figure figcaption {
  position: relative;
  z-index: 1;
  padding: 10px 14px 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate-300);
  border-top: 1px solid var(--about-line);
  background: rgba(10, 30, 40, 0.86);
}

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

/* ---------- 玻璃目录 ---------- */
.page-about .about-index {
  position: relative;
  z-index: 3;
  margin-top: clamp(-34px, -2.4vw, -18px);
  margin-bottom: clamp(26px, 4.4vw, 52px);
  padding: clamp(14px, 2.2vw, 22px);
  border-radius: var(--radius-m);
}

.page-about .about-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 9px 11px;
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: rgba(201, 255, 74, 0.12);
  border-color: rgba(201, 255, 74, 0.42);
  color: var(--lime-300);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--pitch-400);
}

/* ---------- 章节标题 ---------- */
.page-about .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 22px);
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .section-head__num {
  position: static;
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--pitch-400);
  border-bottom: 2px solid var(--lime-300);
  padding-bottom: 4px;
}

.page-about .section-head__body {
  min-width: 0;
}

.page-about .section-head__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ice-050);
}

.page-about .section-head__note {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-300);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  max-width: 66ch;
}

.page-about .about-origin__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .about-quote {
  padding: clamp(18px, 2.6vw, 26px);
  border-left: 3px solid var(--lime-300);
  border-radius: var(--radius-s);
  align-self: start;
}

.page-about .about-quote__text {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--ice-050);
}

.page-about .about-quote__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--pitch-400);
}

/* ---------- 02 轮班 ---------- */
.page-about .about-shifts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-shifts__row {
  display: grid;
  gap: 10px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
  transition: background 0.22s var(--ease);
}

.page-about .about-shifts__row:hover,
.page-about .about-shifts__row:focus-within {
  background: rgba(15, 122, 80, 0.12);
}

.page-about .about-shifts__tag {
  justify-self: start;
  align-self: center;
}

.page-about .about-shifts__body h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 700;
  letter-spacing: -0.005em;
}

.page-about .about-shifts__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-about .about-shifts__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--pitch-400);
}

.page-about .about-editorial__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ice-050);
  background: var(--pitch-900);
  border-left: 3px solid var(--orange-500);
  border-radius: var(--radius-s);
}

/* ---------- 03 三级校验 ---------- */
.page-about .about-check__figure {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  padding: clamp(10px, 1.8vw, 18px);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background:
    radial-gradient(circle at 50% 0%, rgba(29, 187, 122, 0.14), transparent 62%),
    var(--night-800);
}

.page-about .about-check__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-s);
}

.page-about .about-check__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
  color: var(--slate-300);
}

.page-about .about-check__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-about .about-check__step {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-check__step:hover,
.page-about .about-check__step:focus-within {
  border-color: var(--pitch-400);
  background: rgba(15, 122, 80, 0.16);
  transform: translateY(-2px);
}

.page-about .about-check__idx {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--night-900);
  background: var(--lime-300);
  border-radius: var(--radius-pill);
}

.page-about .about-check__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
}

.page-about .about-check__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate-300);
}

/* ---------- 04 覆盖地图 ---------- */
.page-about .about-map {
  display: grid;
  gap: 12px;
}

.page-about .about-map__group {
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--pitch-600);
  border-radius: var(--radius-m);
  transition: border-top-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-map__group:hover,
.page-about .about-map__group:focus-within {
  border-top-color: var(--lime-300);
  background: rgba(10, 30, 40, 0.92);
}

.page-about .about-map__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .about-map__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 700;
}

.page-about .about-map__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime-300);
  white-space: nowrap;
}

.page-about .about-map__dots {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.page-about .about-map__dots li {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: var(--pitch-400);
  box-shadow: inset 0 0 0 1px rgba(5, 19, 26, 0.5);
}

.page-about .about-map__dots li:nth-child(3n) {
  background: var(--lime-300);
}

.page-about .about-map__list {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--ice-050);
}

.page-about .about-map__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-about .about-coverage__next {
  display: grid;
  gap: 6px;
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: 16px 18px;
  border: 1px dashed var(--orange-500);
  border-radius: var(--radius-m);
  background: rgba(255, 106, 61, 0.07);
}

.page-about .about-coverage__next-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-500);
}

.page-about .about-coverage__next-text {
  margin: 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ice-050);
}

/* ---------- 05 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--night-900), var(--pitch-900));
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-timeline__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: grayscale(0.55) contrast(1.05);
}

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

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime-300), var(--pitch-600) 62%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(16px, 2.6vw, 26px) 40px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 2px solid var(--lime-300);
  background: var(--night-900);
}

.page-about .about-timeline__item--accent::before {
  background: var(--lime-300);
  border-color: var(--lime-300);
  box-shadow: 0 0 0 5px rgba(201, 255, 74, 0.16);
}

.page-about .about-timeline__item--hot::before {
  background: var(--orange-500);
  border-color: var(--orange-500);
  box-shadow: 0 0 0 5px rgba(255, 106, 61, 0.18);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime-300);
}

.page-about .about-timeline__item--hot .about-timeline__year {
  color: var(--orange-500);
}

.page-about .about-timeline__card {
  padding: 14px 16px 16px;
  background: rgba(10, 30, 40, 0.9);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-timeline__card:hover,
.page-about .about-timeline__card:focus-within {
  transform: translateX(3px);
  border-color: var(--pitch-400);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate-300);
}

.page-about .about-timeline__foot {
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding-left: 40px;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ice-050);
}

/* ---------- 06 合作 ---------- */
.page-about .about-partners__stats {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .about-partners__stats li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 3px;
  padding: 14px 14px 12px;
  background: var(--about-card);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1;
  color: var(--lime-300);
}

.page-about .about-partners__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--pitch-400);
}

.page-about .about-partners__label {
  flex-basis: 100%;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-300);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-partners__block {
  padding: 15px 16px 17px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--pitch-400);
  border-radius: var(--radius-s);
  background: rgba(7, 61, 42, 0.34);
}

.page-about .about-partners__block h3 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
}

.page-about .about-partners__block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate-300);
}

/* ---------- 07 三件事 + 结尾 ---------- */
.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-principles__list li {
  position: relative;
  padding: 18px 16px 18px;
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
}

.page-about .about-principles__list li::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime-300), transparent);
  opacity: 0.7;
}

.page-about .about-principles__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--pitch-400);
}

.page-about .about-principles__list h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-principles__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 42px);
  padding: clamp(20px, 3.2vw, 32px);
  border-radius: var(--radius-m);
  border: 1px solid var(--about-line);
  background:
    radial-gradient(circle at 92% 12%, rgba(201, 255, 74, 0.18), transparent 56%),
    linear-gradient(135deg, var(--night-800), var(--pitch-900));
}

.page-about .about-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible,
.page-about .about-check__step:focus-within {
  outline: 2px solid var(--lime-300);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-check__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-shifts__row {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
    padding: 18px 4px;
  }

  .page-about .about-shifts__tag {
    justify-self: start;
  }

  .page-about .about-shifts__meta {
    text-align: right;
  }

  .page-about .about-partners__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(20px, 3vw, 40px);
  }

  .page-about .about-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-rail {
    display: block;
    position: absolute;
    left: 12px;
    top: clamp(96px, 9vw, 140px);
    writing-mode: vertical-rl;
    z-index: 2;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--slate-300);
    pointer-events: none;
  }

  .page-about .about-hero__lede {
    padding-left: clamp(0px, 1.4vw, 18px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-shifts__row,
  .page-about .about-check__step,
  .page-about .about-timeline__card,
  .page-about .about-map__group,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .about-check__step:hover,
  .page-about .about-check__step:focus-within,
  .page-about .about-timeline__card:hover,
  .page-about .about-timeline__card:focus-within {
    transform: none;
  }
}
<<<END>>>