.page-about {
  --about-gap: clamp(56px, 9vw, 112px);
  --about-wm: clamp(56px, 15vw, 128px);
  position: relative;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(28px, 5vw, 56px) clamp(24px, 4vw, 44px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: min(760px, 95vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 65% 35%, rgba(200, 255, 77, 0.1), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 40px);
  align-items: end;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__kicker {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--paper);
  margin: 0 0 20px;
}

.page-about .about-hero__mark {
  color: var(--lime);
  display: inline-block;
  transform: skewX(-4deg);
}

.page-about .about-hero__lede {
  max-width: 34em;
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--mute);
  margin: 0 0 24px;
}

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

.page-about .about-hero__media {
  margin: 0;
  position: relative;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-figure__caption {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  color: var(--mute);
}

.page-about .data-strip {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .about-index__title {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--mute);
  margin: 0 0 12px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  white-space: nowrap;
  font-size: var(--fs-sm);
  color: var(--paper);
  text-decoration: none;
  background: var(--layer);
  border-left: 2px solid transparent;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-index__link .mono {
  font-size: var(--fs-xs);
  color: var(--lime);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-left-color: var(--orange);
  background: var(--ink-2);
  color: var(--lime);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-sec {
  position: relative;
  padding-block: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__num {
  position: absolute;
  top: clamp(18px, 3vw, 32px);
  right: 0;
  font-size: var(--about-wm);
  line-height: 1;
  font-weight: 700;
  color: var(--line);
  opacity: 0.35;
  pointer-events: none;
  user-select: none;
}

.page-about .about-sec__kicker {
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--lime);
  margin: 0 0 10px;
}

.page-about .about-sec__title {
  position: relative;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--paper);
  margin: 0 0 16px;
  max-width: 16em;
}

.page-about .about-sec__lede {
  max-width: 34em;
  color: var(--mute);
  line-height: 1.75;
  margin: 0 0 clamp(24px, 4vw, 36px);
}

/* 01 服务对象 */
.page-about .about-serve {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-serve__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-serve__tag {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--orange);
  margin: 0;
}

.page-about .about-serve__text h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.35;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-serve__text p {
  max-width: 34em;
  color: var(--mute);
  line-height: 1.75;
  margin: 0;
}

/* 02 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px clamp(22px, 4vw, 36px);
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--lime) 0%, rgba(200, 255, 77, 0.35) 40%, var(--line) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px;
  outline: none;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(22px, 4vw, 36px) + 1px);
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--lime);
  border-color: var(--cyan);
}

.page-about .about-timeline__year {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 6px;
}

.page-about .about-timeline__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.35;
  color: var(--paper);
  margin: 0 0 6px;
}

.page-about .about-timeline__desc {
  max-width: 34em;
  color: var(--mute);
  line-height: 1.7;
  margin: 0;
}

.page-about .about-timeline__more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.34s var(--ease), opacity 0.34s var(--ease);
}

.page-about .about-timeline__more > span {
  overflow: hidden;
  display: block;
  max-width: 34em;
  color: var(--paper);
  font-size: var(--fs-sm);
  line-height: 1.7;
  padding-top: 0;
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  grid-template-rows: 1fr;
  opacity: 1;
}

.page-about .about-timeline__item:hover .about-timeline__more > span,
.page-about .about-timeline__item:focus-within .about-timeline__more > span {
  padding-top: 8px;
}

/* 03 治理 */
.page-about .about-govern {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-acc {
  border-top: 1px solid var(--line);
  background: transparent;
}

.page-about .about-acc:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-about .about-acc summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

.page-about .about-acc summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  color: var(--orange);
  line-height: 1;
}

.page-about .about-acc[open] summary::after {
  content: "−";
  color: var(--lime);
}

.page-about .about-acc summary:hover,
.page-about .about-acc summary:focus-visible {
  color: var(--lime);
}

.page-about .about-acc__k {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--mute);
  flex: none;
}

.page-about .about-acc p {
  max-width: 34em;
  color: var(--mute);
  line-height: 1.75;
  margin: 0 0 20px;
  padding-left: 0;
}

.page-about .about-govern__media {
  margin: 0;
  align-self: end;
}

.page-about .about-govern__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-left: 2px solid var(--lime);
}

/* 04 团队 */
.page-about .about-sec--team {
  position: relative;
  overflow: hidden;
}

.page-about .about-team__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  filter: grayscale(0.4);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-sec--team > *:not(.about-team__bg) {
  position: relative;
  z-index: 1;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-team__stat {
  border-left: 2px solid var(--lime);
  padding-left: 12px;
}

.page-about .about-team__v {
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  margin: 0 0 6px;
}

.page-about .about-team__k {
  font-size: var(--fs-xs);
  color: var(--mute);
  margin: 0;
  line-height: 1.5;
}

.page-about .about-team__lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-team__line {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__line h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-base);
  color: var(--paper);
  margin: 0 0 6px;
}

.page-about .about-team__line p {
  max-width: 34em;
  color: var(--mute);
  line-height: 1.7;
  font-size: var(--fs-sm);
  margin: 0;
}

/* 05 合作生态 */
.page-about .about-tags {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tags__item {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  padding: 9px 14px;
  color: var(--paper);
  background: var(--layer);
  border: 1px solid transparent;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-tags__item--sup {
  border-color: rgba(79, 216, 192, 0.45);
}

.page-about .about-tags__item--venue {
  border-color: rgba(200, 255, 77, 0.45);
}

.page-about .about-tags__item--media {
  border-color: rgba(255, 107, 44, 0.45);
}

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

.page-about .about-honor {
  border-left: 2px solid var(--orange);
  padding-left: clamp(14px, 3vw, 24px);
}

.page-about .about-honor p {
  max-width: 34em;
  color: var(--paper);
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-about .about-honor__note {
  font-size: var(--fs-xs);
  color: var(--mute);
  letter-spacing: 0.02em;
  margin: 0;
}

.page-about .about-honor__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 216, 192, 0.5);
}

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

/* 06 响应 */
.page-about .about-resp {
  margin: 0 0 clamp(28px, 4vw, 40px);
  display: grid;
  gap: 0;
}

.page-about .about-resp__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-resp__k {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--lime);
  margin: 0;
  letter-spacing: 0.02em;
}

.page-about .about-resp__v {
  margin: 0;
  max-width: 34em;
  color: var(--mute);
  line-height: 1.7;
  font-size: var(--fs-sm);
}

.page-about .about-cta {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: clamp(20px, 3.5vw, 32px);
  display: grid;
  gap: 16px;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 34em;
  color: var(--paper);
  line-height: 1.75;
}

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

@media (min-width: 720px) {
  .page-about .about-serve__item {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .about-team__lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 4vw, 40px);
  }

  .page-about .about-resp__row {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__media {
    transform: translateY(24px);
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-top: 0;
    padding-top: 4px;
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    white-space: normal;
    background: transparent;
    padding: 10px 12px;
    border-left: 2px solid transparent;
    margin-left: -21px;
  }

  .page-about .about-govern {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-govern__media {
    margin-top: clamp(32px, 6vw, 72px);
  }

  .page-about .about-team__lines {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: clamp(16px, 2.4vw, 28px);
  }

  .page-about .about-sec__num {
    opacity: 0.5;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__more,
  .page-about .about-index__link,
  .page-about .about-tags__item,
  .page-about .about-acc summary {
    transition: none;
  }

  .page-about .about-hero__mark {
    transform: none;
  }
}
<<<END>>>