.page-about {
  --about-measure: 34rem;
  --about-space: clamp(56px, 8vw, 112px);
  --about-gap: clamp(20px, 3vw, 40px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(96px, 13vw, 156px) 0 clamp(48px, 7vw, 92px);
  background: var(--ink);
  border-bottom: 2px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -8%;
  bottom: 0;
  width: 52%;
  height: 68%;
  background: var(--green-deep);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.62;
  pointer-events: none;
}

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

.page-about .about-hero__crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-hero__crumb .breadcrumb__item {
  color: var(--mist);
  text-decoration: none;
}

.page-about .about-hero__crumb .breadcrumb__item:hover {
  color: var(--lime);
}

.page-about .about-hero__crumb .breadcrumb__item[aria-current="page"] {
  color: var(--green);
}

.page-about .about-hero__crumb-sep {
  color: var(--line-strong);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(34px, 7.2vw, 78px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  text-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
}

.page-about .about-hero__lede {
  max-width: 36em;
  margin: 24px 0 0;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.9;
  color: rgba(242, 246, 241, 0.84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__side {
  display: flex;
  align-items: flex-start;
  gap: 22px;
  padding-top: 6px;
}

.page-about .about-vert {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--lime);
  border-left: 2px solid var(--green);
  padding-left: 10px;
}

.page-about .about-figs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .about-figs__item {
  border-left: 2px solid var(--line-strong);
  padding-left: 14px;
}

.page-about .about-figs__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-figs__key {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-chapter,
.page-about .about-timeline__wrap,
.page-about .about-partners__inner {
  padding: var(--about-space) 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: var(--about-gap);
}

.page-about .about-chapter__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  padding: 5px 8px;
  color: var(--green);
  border: 2px solid var(--green);
}

.page-about .about-sec__title {
  position: relative;
  margin: 0;
  padding-bottom: 20px;
  font-family: var(--font-sans);
  font-size: clamp(26px, 4.2vw, 50px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-sec__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  background: var(--green);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
}

.page-about .about-prose {
  max-width: var(--about-measure);
}

.page-about .about-prose--wide {
  max-width: 42rem;
}

.page-about .about-prose p {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: rgba(242, 246, 241, 0.84);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-inline-link {
  color: var(--green);
  text-decoration: none;
  border-bottom: 2px solid var(--green);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-inline-link:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-aside {
  border-top: 2px solid var(--line-strong);
  padding-top: 16px;
}

.page-about .about-aside__label {
  margin: 0 0 14px;
  color: var(--lime);
}

.page-about .about-path {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(242, 246, 241, 0.82);
}

.page-about .about-path li::marker {
  color: var(--orange);
  font-family: var(--font-mono);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 246, 241, 0.82);
}

.page-about .about-facts .mono-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--lime);
  font-size: 20px;
  margin-right: 6px;
}

/* ---------- 轮次章节 ---------- */
.page-about .about-rounds {
  background: var(--night);
  border-bottom: 2px solid var(--line);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--ink);
  border-bottom: 2px solid var(--line);
}

.page-about .about-timeline__wrap {
  position: relative;
}

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

.page-about .about-banner {
  margin: 0 0 clamp(32px, 5vw, 56px);
}

.page-about .about-banner__cap {
  color: var(--mist);
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 26px;
  display: grid;
  gap: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--green), var(--orange));
}

.page-about .about-tl__node {
  position: relative;
  padding: 0 0 clamp(30px, 4vw, 46px) 0;
}

.page-about .about-tl__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--ink);
  border: 2px solid var(--green);
}

.page-about .about-tl__node::after {
  content: "";
  position: absolute;
  left: -20px;
  top: 18px;
  width: 20px;
  height: 2px;
  background: var(--lime);
}

.page-about .about-tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lime);
  border: 2px solid var(--line-strong);
  padding: 3px 8px;
}

.page-about .about-tl__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-about .about-tl__sum {
  max-width: var(--about-measure);
  margin: 14px 0 0;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.86);
}

.page-about .about-tl__note {
  max-width: var(--about-measure);
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  overflow: hidden;
  max-height: 260px;
  transition: max-height 0.35s var(--ease), color 0.35s var(--ease);
}

.page-about .about-tl__node:hover .about-tl__note,
.page-about .about-tl__node:focus-within .about-tl__note {
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--wine);
  border-bottom: 2px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding: var(--about-space) 0;
  align-items: start;
}

.page-about .about-team__text .about-prose {
  margin-bottom: 26px;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-roles__item {
  border-left: 3px solid var(--lime);
  padding-left: 16px;
}

.page-about .about-roles__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
  margin-bottom: 6px;
}

.page-about .about-roles__desc {
  display: block;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 246, 241, 0.84);
}

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

.page-about .about-team__media .media__caption {
  color: rgba(242, 246, 241, 0.66);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  background: var(--indigo);
  border-bottom: 2px solid var(--line);
  padding: var(--about-space) 0;
}

.page-about .about-flow__track {
  display: flex;
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 40px);
  padding-bottom: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-flow__track:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 4px;
}

.page-about .about-flow__step {
  flex: 0 0 min(276px, 76vw);
  scroll-snap-align: start;
  padding: 20px 18px 22px;
  background: rgba(6, 19, 28, 0.46);
  border-left: 3px solid var(--orange);
}

.page-about .about-flow__no {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-flow__name {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.3;
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 246, 241, 0.82);
}

/* ---------- 分栏 ---------- */
.page-about .about-columns {
  background: var(--green-deep);
  border-bottom: 2px solid var(--line);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  background: var(--night);
  border-bottom: 2px solid var(--line);
}

.page-about .about-partners__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-partner-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
  max-width: var(--about-measure);
}

.page-about .about-partner-list__item {
  padding-top: 16px;
  border-top: 2px solid var(--line);
}

.page-about .about-partner-list__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 900;
  color: var(--lime);
}

.page-about .about-partner-list__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.84);
}

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

.page-about .about-partners__media .media__caption {
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--ink);
  padding: var(--about-space) 0 calc(var(--about-space) + 16px);
}

.page-about .about-cta__title {
  margin: 0;
  max-width: 22em;
  font-size: clamp(25px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  text-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
}

.page-about .about-cta__text {
  max-width: var(--about-measure);
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: rgba(242, 246, 241, 0.82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-cta__contact {
  display: grid;
  gap: 14px;
  margin: 32px 0 0;
  padding-top: 22px;
  border-top: 2px solid var(--line-strong);
  max-width: var(--about-measure);
}

.page-about .about-cta__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: baseline;
}

.page-about .about-cta__row dt {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .about-cta__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__side {
    gap: 28px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 1fr) 230px;
    align-items: start;
    gap: var(--about-gap);
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-tl {
    padding-left: 34px;
    gap: 0;
  }

  .page-about .about-tl__node::before {
    left: -34px;
  }

  .page-about .about-tl__node::after {
    left: -28px;
    width: 24px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-timeline__side {
    display: block;
    position: absolute;
    top: var(--about-space);
    right: -10px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32em;
    color: var(--mist);
    border-right: 2px solid var(--line);
    padding-right: 10px;
  }
}

@media (hover: none) {
  .page-about .about-tl__note {
    max-height: none;
  }
}

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