.page-about {
  --about-gutter: clamp(18px, 3vw, 44px);
  --about-panel: rgba(14, 42, 71, 0.78);
  --about-glass: rgba(24, 58, 92, 0.5);
  --about-soft-line: rgba(138, 147, 160, 0.18);
  background: var(--deep);
  color: var(--text);
  font-family: var(--sans);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  color: var(--cream);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(30px, 6.2vw, 62px);
  max-width: 17em;
}

.page-about h2 {
  font-size: clamp(23px, 3.6vw, 38px);
  max-width: 20em;
}

.page-about h3 {
  font-size: clamp(17px, 2vw, 20px);
}

.page-about p {
  margin: 0 0 1em;
  line-height: 1.85;
  font-size: 15.5px;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
}

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

.page-about .eyebrow {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.2em;
  margin: 0 0 14px;
  text-transform: none;
}

.page-about .lead {
  color: var(--text-strong);
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.8;
  max-width: 46em;
}

.page-about .section {
  padding: clamp(48px, 8vw, 104px) 0;
  position: relative;
}

.page-about .index-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 64px) 0 clamp(46px, 7vw, 96px);
  background: linear-gradient(168deg, #0B2440 0%, var(--deep) 62%);
  overflow: hidden;
}

.page-about .about-hero__wash {
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(760px, 92vw);
  height: min(560px, 78vw);
  background: linear-gradient(148deg, rgba(53, 240, 208, 0.16), rgba(110, 106, 138, 0.22) 48%, rgba(255, 138, 61, 0.1));
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 74%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(138, 147, 160, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 147, 160, 0.09) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(120deg, #000 0%, transparent 62%);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--stone);
  margin-bottom: clamp(28px, 5vw, 56px);
  flex-wrap: wrap;
}

.page-about .breadcrumb a {
  color: var(--stone);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb .breadcrumb__sep {
  color: rgba(138, 147, 160, 0.6);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-strong);
}

.page-about .about-hero .lead {
  margin-top: 22px;
  border-left: 1px solid var(--line-strong);
  padding-left: clamp(14px, 2vw, 22px);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(30px, 5vw, 52px);
  max-width: 940px;
}

.page-about .about-metric {
  background: var(--deep-2);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-metric__num {
  color: var(--cream);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-about .about-metric__label {
  font-size: 12.5px;
  color: var(--stone);
  line-height: 1.5;
}

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

/* ---------- 引言 ---------- */
.page-about .about-intro__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-intro__body h2 {
  margin-bottom: 20px;
}

.page-about .about-intro__aside {
  border: 1px solid var(--line);
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  padding: clamp(20px, 3vw, 28px);
  align-self: start;
}

.page-about .about-aside__kicker {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 12px;
}

.page-about .about-aside__text {
  color: var(--text-strong);
  font-size: 14.5px;
}

.page-about .about-aside__link {
  display: inline-block;
  margin-top: 6px;
  font-size: 13px;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
  padding-bottom: 2px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, rgba(14, 42, 71, 0.5), rgba(7, 26, 47, 0));
}

.page-about .about-timeline__head {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .about-timeline__head .lead {
  margin-top: 16px;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(53, 240, 208, 0.1), rgba(53, 240, 208, 0.75) 30%, rgba(138, 147, 160, 0.35) 86%, transparent);
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 0 14px;
  padding-bottom: 18px;
  position: relative;
}

.page-about .timeline__marker {
  grid-column: 1;
  grid-row: 1;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--deep);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.page-about .timeline__marker .index-num {
  font-size: 12.5px;
  color: var(--stone);
  letter-spacing: 0.04em;
}

.page-about .timeline__item--now .timeline__marker {
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, 0.12);
}

.page-about .timeline__item--now .timeline__marker .index-num {
  color: var(--cyan);
}

.page-about .timeline__card {
  grid-column: 2;
  grid-row: 1;
  background: var(--about-glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  padding: 16px 18px 6px;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .timeline__card[open] {
  border-color: rgba(53, 240, 208, 0.4);
  background: var(--about-panel);
}

.page-about .timeline__card summary {
  cursor: pointer;
  list-style: none;
  color: var(--text-strong);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  padding-right: 26px;
  position: relative;
  padding-bottom: 12px;
}

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

.page-about .timeline__card summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -1px;
  color: var(--cyan);
  font-weight: 400;
  font-size: 18px;
  line-height: 1;
}

.page-about .timeline__card[open] summary::after {
  content: "–";
}

.page-about .timeline__card summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .timeline__year {
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.06em;
  margin-right: 10px;
}

.page-about .timeline__card p {
  font-size: 14.5px;
  color: var(--text);
  margin-bottom: 12px;
}

.page-about .about-timeline__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
  border: 1px solid var(--line);
  background: var(--deep-2);
  overflow: hidden;
}

.page-about .about-timeline__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 3;
  background: linear-gradient(140deg, rgba(14, 42, 71, 0.9), rgba(7, 26, 47, 0.9));
}

.page-about .media-frame__caption {
  padding: 12px 18px;
  font-size: 12.5px;
  color: var(--stone);
  border-top: 1px solid var(--about-soft-line);
}

/* ---------- 栏目分工 ---------- */
.page-about .about-map__head {
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-map__head .lead {
  margin-top: 14px;
}

.page-about .map-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .map-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 20px 12px 20px 14px;
  border-bottom: 1px solid var(--about-soft-line);
  position: relative;
  transition: background 0.22s var(--ease);
}

.page-about .map-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14%;
  bottom: 14%;
  width: 2px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity 0.22s var(--ease);
}

.page-about .map-row:hover,
.page-about .map-row:focus-within {
  background: rgba(24, 58, 92, 0.42);
}

.page-about .map-row:hover::before,
.page-about .map-row:focus-within::before {
  opacity: 1;
}

.page-about .map-row--accent::before {
  background: var(--orange);
  opacity: 0.7;
}

.page-about .map-row__idx {
  grid-column: 1;
  grid-row: 1;
  color: var(--stone);
  font-size: 12.5px;
  padding-top: 4px;
}

.page-about .map-row__name {
  grid-column: 2;
  grid-row: 1;
  color: var(--cream);
  font-weight: 700;
  font-size: 16.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .map-row__desc {
  grid-column: 2;
  grid-row: 2;
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.7;
}

.page-about .map-row__who {
  grid-column: 2;
  grid-row: 3;
  font-size: 13px;
  color: var(--stone);
  line-height: 1.6;
}

.page-about .map-row .tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 3px 8px;
}

.page-about .tag--orange {
  background: var(--orange);
  color: #26140A;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, rgba(110, 106, 138, 0.1), rgba(7, 26, 47, 0));
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .about-team__body h2 {
  margin-bottom: 18px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-strong);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--moss);
  transform: rotate(45deg);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--deep-2);
  overflow: hidden;
}

.page-about .about-team__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 9 / 7;
}

/* ---------- 收录规模 ---------- */
.page-about .about-scale__head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-scale__head .lead {
  margin-top: 14px;
}

.page-about .scale-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .scale-block {
  border: 1px solid var(--line);
  background: var(--deep-2);
  padding: 22px 20px 18px;
  position: relative;
  overflow: hidden;
}

.page-about .scale-block::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -30px;
  width: 96px;
  height: 96px;
  border: 1px solid rgba(53, 240, 208, 0.18);
  transform: rotate(45deg);
}

.page-about .scale-block__num {
  display: block;
  color: var(--cream);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.page-about .scale-block__plus {
  font-size: 14px;
  font-weight: 400;
  color: var(--stone);
  margin-left: 6px;
  letter-spacing: 0;
}

.page-about .scale-block__label {
  display: block;
  margin: 8px 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .scale-block p {
  font-size: 14px;
  color: var(--text);
  margin: 0;
}

.page-about .about-scale__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  background: var(--deep-2);
  overflow: hidden;
}

.page-about .about-scale__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 4;
}

/* ---------- 流程 ---------- */
.page-about .about-process__grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-process__body h2 {
  margin-bottom: 18px;
}

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

.page-about .process-step {
  background: var(--deep-2);
  padding: 22px 20px;
}

.page-about .process-step__no {
  display: block;
  color: var(--orange);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  margin-bottom: 8px;
}

.page-about .process-step h3 {
  margin-bottom: 8px;
}

.page-about .process-step p {
  margin: 0;
  font-size: 14px;
  color: var(--text);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(201, 113, 74, 0.14), rgba(7, 26, 47, 0.2) 55%, rgba(53, 240, 208, 0.08));
}

.page-about .about-partners__inner {
  max-width: 760px;
}

.page-about .about-partners h2 {
  margin-bottom: 18px;
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 14.5px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .btn--accent {
  background: var(--orange);
  color: #24130A;
}

.page-about .btn--accent:hover,
.page-about .btn--accent:focus-visible {
  background: #FFA268;
  color: #24130A;
  transform: translateY(-2px);
}

.page-about .btn--ghost {
  border-color: var(--line-strong);
  color: var(--cyan);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 240, 208, 0.08);
  transform: translateY(-2px);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .about-next__body h2 {
  margin-bottom: 16px;
}

.page-about .about-next__links {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .next-link {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 18px;
  background: var(--deep-2);
  transition: background 0.2s var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  background: rgba(24, 58, 92, 0.85);
}

.page-about .next-link__label {
  color: var(--cyan);
  font-weight: 700;
  font-size: 15px;
}

.page-about .next-link__desc {
  color: var(--stone);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .map-row {
    grid-template-columns: 46px minmax(120px, 0.7fr) minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 8px 20px;
    align-items: start;
    padding: 22px 16px 22px 18px;
  }

  .page-about .map-row__idx {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .map-row__name {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .map-row__desc {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .map-row__who {
    grid-column: 4;
    grid-row: 1;
  }
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-team__figure {
    margin-top: 8px;
  }

  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

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

  .page-about .about-rail {
    display: block;
    position: absolute;
    right: 18px;
    top: 46%;
    transform: rotate(90deg);
    transform-origin: right center;
    font-size: 11px;
    letter-spacing: 0.32em;
    color: rgba(157, 247, 231, 0.45);
    white-space: nowrap;
    z-index: 1;
  }

  .page-about .timeline::before {
    left: 50%;
    top: 14px;
    bottom: 14px;
  }

  .page-about .timeline__item {
    grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);
    gap: 0 28px;
    padding-bottom: 26px;
  }

  .page-about .timeline__marker {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
  }

  .page-about .timeline__card {
    grid-column: 1;
    grid-row: 1;
    padding: 20px 22px 8px;
  }

  .page-about .timeline__item:nth-child(even) .timeline__card {
    grid-column: 3;
  }

  .page-about .scale-block {
    padding: 26px 24px 22px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-intro__aside {
    margin-top: 46px;
  }

  .page-about .about-timeline__figure {
    margin-top: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .btn,
  .page-about .map-row,
  .page-about .timeline__card,
  .page-about .next-link {
    transition: none;
  }
}
<<<END>>>