.page-about {
  --about-rail: clamp(58px, 11vw, 132px);
  --about-gap: clamp(18px, 3.2vw, 34px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 32px);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

.page-about .page-head {
  padding-block: clamp(16px, 2.6vw, 28px) clamp(24px, 4vw, 44px);
}

.page-about .page-head__kicker {
  margin: 0 0 0.9em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .page-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.35rem, 8.2vw, 5.8rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .page-head__lede {
  max-width: 62ch;
  margin: clamp(18px, 3vw, 28px) 0 0;
  font-size: clamp(1rem, 2.2vw, 1.16rem);
  line-height: 1.9;
  color: var(--mist);
}

/* 首图 */
.page-about .about-hero {
  margin: 0;
  padding: 0;
}

.page-about .about-hero img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.78) contrast(1.06);
}

.page-about .about-hero .img-frame__caption {
  max-width: 92ch;
  padding: 12px clamp(18px, 4vw, 40px) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* 章节锚点条 */
.page-about .about-toc {
  position: sticky;
  top: 0;
  z-index: 20;
  margin-top: clamp(22px, 3vw, 34px);
  background: linear-gradient(180deg, var(--ink) 72%, rgba(7, 17, 14, 0.9));
  border-bottom: 1px solid var(--line);
}

.page-about .about-toc__inner {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding-block: 10px;
  scrollbar-width: none;
}

.page-about .about-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  flex: 0 0 auto;
  padding: 5px 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

/* 章节通用 */
.page-about .section {
  padding-block: clamp(40px, 6.5vw, 88px);
}

.page-about .section__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .section__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(1.65rem, 4.4vw, 3rem);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .lede {
  max-width: 60ch;
  margin: 0 0 1.1em;
  font-size: clamp(1.04rem, 2.3vw, 1.26rem);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .bodycopy {
  max-width: 62ch;
  margin: 0 0 1em;
  font-size: clamp(0.96rem, 2vw, 1.02rem);
  line-height: 1.92;
  color: var(--mist);
}

/* 01 起点 */
.page-about .about-origin__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-note {
  padding: 18px 20px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
}

.page-about .about-note .plate__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-note .plate__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 880px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-note {
    position: sticky;
    top: 74px;
  }
}

/* 暗红色带 */
.page-about .about-ribbon {
  background: var(--red);
  color: var(--paper);
  border-block: 1px solid var(--red-hi);
}

.page-about .about-ribbon__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  padding-block: clamp(14px, 2.4vw, 22px);
}

.page-about .about-ribbon__num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-soft);
}

.page-about .about-ribbon__text {
  margin: 0;
  font-size: clamp(0.95rem, 2vw, 1.14rem);
  font-weight: 700;
  line-height: 1.6;
}

/* 02 阶段时间轴 */
.page-about .about-axis {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .stage {
  border-bottom: 1px solid var(--line);
}

.page-about .stage summary {
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr) 26px;
  align-items: center;
  gap: clamp(10px, 2vw, 20px);
  padding: clamp(14px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  transition: background 0.2s ease;
}

.page-about .stage summary::-webkit-details-marker {
  display: none;
}

.page-about .stage summary:hover,
.page-about .stage summary:focus-visible {
  background: rgba(216, 235, 220, 0.05);
  outline: none;
}

.page-about .stage__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 4.6vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .stage__name {
  display: block;
  font-size: clamp(1rem, 2.4vw, 1.22rem);
  font-weight: 800;
  color: var(--paper);
}

.page-about .stage__line {
  display: block;
  margin-top: 5px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .stage__mark {
  position: relative;
  justify-self: end;
  width: 18px;
  height: 18px;
}

.page-about .stage__mark::before,
.page-about .stage__mark::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-about .stage__mark::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 2px;
}

.page-about .stage__mark::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-about .stage details[open] .stage__mark::after {
  transform: scaleY(0);
}

.page-about .stage details[open] .stage__mark::before {
  background: var(--lime);
}

.page-about .stage__more {
  margin: 0;
  padding: 0 0 clamp(16px, 2.4vw, 24px) calc(var(--about-rail) + clamp(10px, 2vw, 20px));
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.92;
  color: var(--mist);
}

/* 03 团队 */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-team__list {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__item {
  padding: 16px 18px;
  background: var(--green-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.page-about .about-team__item:hover {
  border-color: var(--lime);
  background: rgba(216, 235, 220, 0.08);
  transform: translateY(-2px);
}

.page-about .about-team__item .plate__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--data);
}

.page-about .about-team__item .plate__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

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

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(0.78) brightness(0.85);
}

.page-about .about-team__fig .img-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-about .about-team__list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-about .about-team__fig {
    position: sticky;
    top: 74px;
  }
}

/* 04 区域 */
.page-about .about-region__grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
}

.page-about .about-map {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: clamp(12px, 2vw, 20px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  background: rgba(7, 17, 14, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-map__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 4px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.3;
  color: var(--mist);
  background: rgba(14, 42, 34, 0.7);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-about .about-map__cell:hover {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

@media (min-width: 720px) {
  .page-about .about-map {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-auto-rows: minmax(50px, auto);
  }

  .page-about .about-map__cell {
    font-size: 11px;
  }

  .page-about .about-map__cell:nth-child(1) { grid-column: 1; grid-row: 1; }
  .page-about .about-map__cell:nth-child(2) { grid-column: 2; grid-row: 1; }
  .page-about .about-map__cell:nth-child(3) { grid-column: 3; grid-row: 1; }
  .page-about .about-map__cell:nth-child(4) { grid-column: 4; grid-row: 1; }
  .page-about .about-map__cell:nth-child(5) { grid-column: 1; grid-row: 2; }
  .page-about .about-map__cell:nth-child(6) { grid-column: 3; grid-row: 2; }
  .page-about .about-map__cell:nth-child(7) { grid-column: 5; grid-row: 2; }
  .page-about .about-map__cell:nth-child(8) { grid-column: 6; grid-row: 2; }
  .page-about .about-map__cell:nth-child(9) { grid-column: 1; grid-row: 3; }
  .page-about .about-map__cell:nth-child(10) { grid-column: 3; grid-row: 3; }
  .page-about .about-map__cell:nth-child(11) { grid-column: 5; grid-row: 3; }
  .page-about .about-map__cell:nth-child(12) { grid-column: 4; grid-row: 4; }
  .page-about .about-map__cell:nth-child(13) { grid-column: 5; grid-row: 4; }
}

.page-about .about-region__fig {
  margin: 0 0 clamp(18px, 3vw, 26px);
}

.page-about .about-region__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(0.7) brightness(0.8);
}

.page-about .about-region__fig .img-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-region__stats {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
}

.page-about .about-region__stats .stat {
  padding-top: 10px;
  border-top: 2px solid var(--lime);
}

.page-about .about-region__stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-region__stats .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 940px) {
  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

/* 05 周末 */
.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: none;
}

.page-about .about-flow__step {
  padding: 20px 20px 22px;
  background: var(--green-deep);
  border: 1px solid var(--line);
  border-top: 3px solid var(--data);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-flow__step:hover {
  border-color: var(--line);
  border-top-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .about-flow__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--data);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-flow__step p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--mist);
}

@media (min-width: 820px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

/* 06 里程碑 */
.page-about .about-marks__list {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-marks__item {
  padding: 18px 20px 20px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-marks__item:hover {
  border-color: var(--lime);
  background: var(--glass-hi);
}

.page-about .about-marks__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-marks__item h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .about-marks__item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-marks__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

/* 收束 */
.page-about .about-cta {
  padding-block: clamp(44px, 6vw, 84px);
  background: linear-gradient(180deg, var(--ink) 0%, var(--green-deep) 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-cta__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.6rem, 4.4vw, 2.8rem);
  line-height: 1.16;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-cta .bodycopy {
  max-width: 58ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-top: 6px;
}

.page-about .about-cta__actions .linkarrow {
  color: var(--lime);
}
<<<END>>>