.page-about {
  background: var(--void);
  color: var(--salt);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 44px) 0 clamp(48px, 7vw, 84px);
  background:
    linear-gradient(172deg, rgba(14, 42, 61, 0.85) 0%, rgba(6, 24, 38, 0) 62%),
    var(--void);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -8%;
  width: 52%;
  height: 100%;
  background: linear-gradient(108deg, rgba(53, 240, 192, 0.07) 0%, rgba(53, 240, 192, 0) 78%);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--salt);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 58ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--anchor);
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-hero__fact {
  background: var(--tactic);
  padding: 16px 16px 18px;
}

.page-about .about-hero__fact dt {
  font-size: var(--fs-xxs);
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero__fact dd {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-hero__fact .unit {
  margin-left: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.82fr);
    align-items: end;
    gap: clamp(36px, 5vw, 72px);
  }
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(44px, 6.5vw, 88px) 0;
  border-top: 1px solid var(--anchor);
}

.page-about .about-section__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-section__head h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--salt);
}

.page-about .about-section__intro {
  margin: 16px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--mist);
  max-width: 58ch;
}

/* ---------- 四支小队 ---------- */
.page-about .about-roles {
  background: linear-gradient(180deg, rgba(14, 42, 61, 0.55) 0%, rgba(6, 24, 38, 0) 100%);
}

.page-about .roles__grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
}

.page-about .roles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--anchor);
  border: 1px solid var(--anchor);
}

.page-about .roles__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 20px 16px 22px;
  background: var(--void);
  transition: background 180ms var(--ease);
}

.page-about .roles__item:hover {
  background: var(--tactic);
}

.page-about .roles__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 32px);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .roles__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--salt);
}

.page-about .roles__desc {
  margin: 8px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .roles__figure {
  position: relative;
  margin: 0;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .roles__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .roles__figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 40px 16px 14px;
  font-size: var(--fs-xs);
  line-height: 1.65;
  color: var(--mist);
  background: linear-gradient(0deg, rgba(6, 24, 38, 0.94) 0%, rgba(6, 24, 38, 0) 100%);
}

@media (min-width: 960px) {
  .page-about .roles__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
  .page-about .roles__figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 工序 ---------- */
.page-about .about-steps {
  background: linear-gradient(198deg, rgba(15, 122, 98, 0.14) 0%, rgba(6, 24, 38, 0) 52%);
}

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

.page-about .steps__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 18px 24px;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .steps__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--cyan);
  transition: width 220ms var(--ease);
}

.page-about .steps__item:hover,
.page-about .steps__item:focus-within {
  border-color: var(--cyan);
}

.page-about .steps__item:hover::before {
  width: 100%;
}

.page-about .steps__index {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-about .steps__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--salt);
}

.page-about .steps__desc {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .steps__goal {
  margin: 4px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--anchor);
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--teal);
  transition: color 200ms var(--ease);
}

.page-about .steps__item:hover .steps__goal {
  color: var(--cyan);
}

.page-about .steps__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .steps__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .steps__figure figcaption {
  padding: 12px 16px 14px;
  font-size: var(--fs-xs);
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--anchor);
}

@media (min-width: 880px) {
  .page-about .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .steps__item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -14px;
    top: 26px;
    width: 13px;
    height: 1px;
    background: var(--coral);
    transform: rotate(-32deg);
  }
  .page-about .steps__figure img {
    aspect-ratio: 16 / 9;
  }
}

/* ---------- 三个阶段 ---------- */
.page-about .stages {
  display: grid;
  gap: 24px;
}

.page-about .stages__rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  overflow-x: auto;
  padding-bottom: 4px;
}

.page-about .stages__node {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease);
}

.page-about .stages__node::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  background: var(--void);
  border: 1px solid var(--anchor);
  transform: rotate(45deg);
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .stages__node:hover,
.page-about .stages__node:focus-visible {
  color: var(--cyan);
}

.page-about .stages__node:hover::before,
.page-about .stages__node:focus-visible::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .stages__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .stages__stage {
  padding: clamp(20px, 3vw, 30px) clamp(18px, 3vw, 32px);
  background: var(--tactic);
  border: 1px solid var(--anchor);
  border-left: 3px solid var(--anchor);
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: border-color 200ms var(--ease), border-left-color 200ms var(--ease);
}

.page-about .stages__stage:hover {
  border-color: var(--cyan);
}

.page-about .stages__stage:target {
  border-left-color: var(--coral);
  border-color: var(--anchor);
}

.page-about .stages__stage .chip {
  display: inline-block;
  margin: 0 0 12px;
}

.page-about .stages__stage-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--salt);
}

.page-about .stages__stage p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .stages {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
  .page-about .stages__rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 0;
    overflow: visible;
    padding: 0;
  }
  .page-about .stages__rail::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 16px;
    bottom: 16px;
    width: 1px;
    background: var(--anchor);
  }
  .page-about .stages__node {
    width: 100%;
    padding: 14px 0 14px 26px;
  }
  .page-about .stages__node::before {
    position: absolute;
    left: 1px;
    top: 50%;
    margin-top: -5px;
  }
}

/* ---------- 赛事覆盖 ---------- */
.page-about .about-coverage {
  background: linear-gradient(180deg, rgba(14, 42, 61, 0.62) 0%, rgba(6, 24, 38, 0) 70%);
}

.page-about .coverage__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
}

.page-about .coverage__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .coverage__tags li {
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.08em;
  color: var(--salt);
  background: var(--tactic);
  border: 1px solid var(--anchor);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .coverage__tags li:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .coverage__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  background: var(--anchor);
  border: 1px solid var(--anchor);
}

.page-about .coverage__stats > div {
  background: var(--void);
  padding: 16px 14px 18px;
}

.page-about .coverage__stats dt {
  font-size: var(--fs-xxs);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .coverage__stats dd {
  margin: 9px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--cyan);
}

.page-about .coverage__stats .unit {
  margin-left: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .coverage__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .coverage__figure {
  margin: 0;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .coverage__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .coverage__figure figcaption {
  padding: 12px 16px 14px;
  font-size: var(--fs-xs);
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--anchor);
}

@media (min-width: 900px) {
  .page-about .coverage__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
  .page-about .coverage__figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 值守 ---------- */
.page-about .about-watch__card {
  padding: clamp(24px, 4vw, 52px);
}

.page-about .about-watch__card .eyebrow {
  color: var(--teal);
}

.page-about .about-watch__card h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-about .about-watch__lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(36, 26, 19, 0.78);
}

.page-about .watch__grid {
  display: grid;
  gap: 0;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  border-top: 1px solid rgba(36, 26, 19, 0.2);
}

.page-about .watch__cell {
  padding: 20px 0 22px;
  border-bottom: 1px solid rgba(36, 26, 19, 0.14);
}

.page-about .watch__cell h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--ink);
}

.page-about .watch__cell p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(36, 26, 19, 0.76);
}

.page-about .about-watch__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: rgba(36, 26, 19, 0.8);
}

.page-about .about-watch__link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 122, 98, 0.4);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-watch__link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

@media (min-width: 780px) {
  .page-about .watch__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }
  .page-about .watch__cell {
    border-bottom: none;
    border-left: 1px solid rgba(36, 26, 19, 0.18);
    padding: 18px 8px 4px 20px;
  }
  .page-about .watch__cell:first-child {
    border-left: none;
    padding-left: 0;
  }
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  background: linear-gradient(180deg, rgba(14, 42, 61, 0.5) 0%, rgba(6, 24, 38, 0) 82%);
}

.page-about .partners__grid {
  display: grid;
  gap: 14px;
}

.page-about .partners__card {
  position: relative;
  padding: 22px 18px 24px;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .partners__card:hover {
  border-color: var(--cyan);
}

.page-about .partners__mark {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-about .partners__card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--salt);
}

.page-about .partners__card p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta {
  margin-top: clamp(30px, 4.5vw, 52px);
  padding: clamp(24px, 4vw, 40px);
  background: linear-gradient(104deg, rgba(15, 122, 98, 0.28) 0%, rgba(6, 24, 38, 0) 72%);
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-cta__text h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--salt);
}

.page-about .about-cta__text p {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

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

@media (min-width: 900px) {
  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }
  .page-about .about-cta__actions {
    margin-top: 0;
    flex: none;
  }
}

/* ---------- 细节修正 ---------- */
.page-about a {
  text-underline-offset: 3px;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }
}
<<<END>>>