.page-about {
  --about-rail-w: 160px;
  --about-cut: 18px;
  display: block;
  background: var(--qs-night);
  color: var(--qs-text);
  font-family: var(--qs-body);
  overflow-x: clip;
}

.page-about .about-crumb {
  margin-bottom: clamp(20px, 4vw, 36px);
  font-size: 13px;
}

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

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--qs-lime);
}

.page-about .about-crumb__sep {
  margin: 0 8px;
  color: var(--qs-line);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--qs-white);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: calc(var(--qs-header-h) + 28px) 0 clamp(40px, 7vw, 76px);
  background:
    radial-gradient(120% 96% at 88% -10%, rgba(39, 194, 176, 0.16), transparent 62%),
    linear-gradient(180deg, #0A1B2E 0%, var(--qs-night) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: 16%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--qs-line) 28%, var(--qs-line) 72%, transparent);
  transform: rotate(-4deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 800;
  font-size: clamp(32px, 7.2vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--qs-white);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--qs-text);
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  padding: clamp(18px, 3vw, 26px);
  background: linear-gradient(160deg, rgba(14, 37, 64, 0.96), rgba(7, 20, 38, 0.92));
  border: 1px solid var(--qs-line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    var(--about-cut) 100%,
    0 calc(100% - var(--about-cut))
  );
}

.page-about .about-panel__cap {
  margin: 0 0 16px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--qs-line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 12px;
  background: #0B1F36;
}

.page-about .about-stat__num {
  font-family: var(--qs-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--qs-orange);
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--qs-orange);
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.4;
  color: var(--qs-mist);
}

.page-about .about-panel__note {
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--qs-mist);
}

/* ---------- 年份刻度 + 跨页 ---------- */

.page-about .about-chronicle {
  padding-bottom: clamp(24px, 4vw, 48px);
}

.page-about .about-chronicle__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .about-rail__cap {
  margin: 0 0 10px;
  font-family: var(--qs-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--qs-mist);
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__list > li {
  flex: 0 0 auto;
}

.page-about .about-rail__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--qs-line);
  color: var(--qs-mist);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13px;
  transition: color 0.2s var(--qs-ease), border-color 0.2s var(--qs-ease),
    background-color 0.2s var(--qs-ease);
}

.page-about .about-rail__item:hover,
.page-about .about-rail__item:focus-visible {
  color: var(--qs-lime);
  border-color: var(--qs-lime);
  background: rgba(200, 244, 65, 0.08);
}

.page-about .about-rail__year {
  font-family: var(--qs-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--qs-white);
}

.page-about .about-rail__item:hover .about-rail__year,
.page-about .about-rail__item:focus-visible .about-rail__year {
  color: var(--qs-lime);
}

/* 展签跨页 */

.page-about .about-spread {
  padding: clamp(32px, 6vw, 64px) 0;
  border-top: 1px solid var(--qs-line);
}

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

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

.page-about .about-spread__year {
  display: block;
  font-family: var(--qs-display);
  font-weight: 800;
  font-size: clamp(52px, 12vw, 92px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--qs-line);
  margin-bottom: 14px;
}

.page-about .about-spread__head {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.1;
  color: var(--qs-white);
}

.page-about .about-spread__claim {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--qs-orange);
  font-family: var(--qs-serif);
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.7;
  color: var(--qs-lime);
}

.page-about .about-spread__body {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--qs-text);
}

.page-about .about-points {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--qs-mist);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 10px;
  height: 2px;
  background: var(--qs-lake);
}

/* 图片块 */

.page-about .about-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--qs-stand);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    var(--about-cut) 100%,
    0 calc(100% - var(--about-cut))
  );
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-figure__cap {
  margin: 0;
  padding: 10px 14px;
  font-family: var(--qs-serif);
  font-size: 12px;
  line-height: 1.6;
  color: var(--qs-mist);
  background: rgba(7, 20, 38, 0.9);
  border-top: 1px solid var(--qs-line);
}

/* 纸面板跨页 */

.page-about .about-spread--paper {
  background: var(--qs-paper);
  color: var(--qs-ink);
  padding: clamp(24px, 4vw, 44px);
  margin: clamp(20px, 3vw, 32px) 0;
  border-top: 0;
  clip-path: polygon(
    0 0,
    calc(100% - 24px) 0,
    100% 24px,
    100% 100%,
    24px 100%,
    0 calc(100% - 24px)
  );
}

.page-about .about-spread--paper .about-spread__year {
  -webkit-text-stroke: 1px rgba(42, 33, 27, 0.28);
}

.page-about .about-spread--paper .qs-eyebrow {
  color: var(--qs-lake-deep);
}

.page-about .about-spread--paper .about-spread__head {
  color: var(--qs-ink);
}

.page-about .about-spread--paper .about-spread__claim {
  color: var(--qs-orange-deep);
  border-left-color: var(--qs-orange-deep);
}

.page-about .about-spread--paper .about-spread__body {
  color: #3B302A;
}

.page-about .about-spread--paper .about-points li {
  color: #5A4B42;
}

.page-about .about-spread--paper .about-points li::before {
  background: var(--qs-lake-deep);
}

/* 2020 数据牌 */

.page-about .about-board {
  padding: 18px 18px 8px;
  background: #0B1F36;
  border: 1px solid var(--qs-line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    var(--about-cut) 100%,
    0 calc(100% - var(--about-cut))
  );
}

.page-about .about-board__cap {
  margin: 0 0 10px;
  font-family: var(--qs-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--qs-lake);
}

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

.page-about .about-board__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid var(--qs-line);
}

.page-about .about-board__row dt {
  font-size: 13px;
  color: var(--qs-mist);
}

.page-about .about-board__row dd {
  margin: 0;
  font-family: var(--qs-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--qs-orange);
}

/* 2025 双入口对照 */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-split__cell {
  padding: 18px;
  background: rgba(14, 37, 64, 0.7);
  border: 1px solid var(--qs-line);
  border-left: 2px solid var(--qs-lake);
}

.page-about .about-split__cell--alt {
  border-left-color: var(--qs-orange);
}

.page-about .about-split__cap {
  margin: 0 0 8px;
  color: var(--qs-lake);
}

.page-about .about-split__cell--alt .about-split__cap {
  color: var(--qs-orange);
}

.page-about .about-split__txt {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--qs-text);
}

/* ---------- 数据方法（纸面） ---------- */

.page-about .about-method {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-method .qs-eyebrow {
  color: var(--qs-lake-deep);
}

.page-about .about-method__head {
  max-width: 44em;
}

.page-about .about-method__title {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.08;
  color: var(--qs-ink);
}

.page-about .about-method__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: #3B302A;
}

.page-about .about-method__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  margin-top: clamp(28px, 5vw, 48px);
}

.page-about .about-chart {
  display: block;
  width: 100%;
  max-width: 460px;
  height: auto;
}

.page-about .about-chart__cap {
  font-family: var(--qs-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  fill: var(--qs-ink);
}

.page-about .about-chart__track {
  fill: rgba(42, 33, 27, 0.12);
}

.page-about .about-chart__bar {
  transform-box: fill-box;
  transform-origin: left center;
  transform: scaleX(1);
  transition: transform 0.85s var(--qs-ease);
}

.page-about .about-chart__bar--own {
  fill: var(--qs-orange);
}

.page-about .about-chart__bar--grant {
  fill: var(--qs-lake-deep);
}

.qs-js .page-about .about-chart-wrap:not(.is-visible) .about-chart__bar {
  transform: scaleX(0);
}

.page-about .about-chart__note {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 13px;
  line-height: 1.75;
  color: #5A4B42;
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-fact {
  padding: 16px 0;
  border-top: 1px solid rgba(42, 33, 27, 0.16);
}

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

.page-about .about-fact dt {
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--qs-orange-deep);
}

.page-about .about-fact dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3B302A;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(44px, 7vw, 88px) 0;
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(39, 194, 176, 0.12), transparent 60%),
    var(--qs-night);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  align-items: start;
}

.page-about .about-team__title {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.08;
  color: var(--qs-white);
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--qs-text);
}

.page-about .about-team__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__item {
  padding: 18px;
  background: rgba(14, 37, 64, 0.72);
  border: 1px solid var(--qs-line);
  border-bottom: 2px solid var(--qs-line);
}

.page-about .about-team__no {
  display: block;
  font-family: var(--qs-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--qs-lime);
}

.page-about .about-team__name {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--qs-white);
}

.page-about .about-team__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--qs-mist);
}

.page-about .about-team__media img {
  aspect-ratio: 4 / 3;
}

.page-about .about-team__quote {
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 22px 0 0 20px;
  border-left: 3px solid var(--qs-orange);
  border-top: 1px solid var(--qs-line);
  font-family: var(--qs-serif);
  font-size: clamp(16px, 2.3vw, 21px);
  line-height: 1.8;
  color: var(--qs-paper);
}

/* ---------- 合作 ---------- */

.page-about .about-partners {
  position: relative;
  padding-bottom: clamp(44px, 7vw, 88px);
  background: var(--qs-night);
}

.page-about .about-partners__band {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--qs-line);
}

.page-about .about-partners__band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  filter: saturate(0.6) brightness(0.62);
}

.page-about .about-partners__inner {
  padding-top: clamp(28px, 5vw, 52px);
}

.page-about .about-partners__title {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.08;
  color: var(--qs-white);
}

.page-about .about-partners__lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--qs-text);
}

.page-about .about-acc-group {
  margin-top: clamp(24px, 4vw, 40px);
  max-width: 52em;
  border-bottom: 1px solid var(--qs-line);
}

.page-about .about-acc {
  border-top: 1px solid var(--qs-line);
  padding: 16px 0;
}

.page-about .about-acc > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 23px);
  letter-spacing: 0.01em;
  color: var(--qs-white);
}

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

.page-about .about-acc > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--qs-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--qs-lake);
  transition: transform 0.25s var(--qs-ease), color 0.25s var(--qs-ease);
}

.page-about .about-acc[open] > summary::after {
  transform: rotate(45deg);
  color: var(--qs-orange);
}

.page-about .about-acc > summary:hover {
  color: var(--qs-lime);
}

.page-about .about-acc__body {
  margin-top: 12px;
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--qs-orange);
  font-size: 15px;
  line-height: 1.85;
  color: var(--qs-text);
}

.page-about .about-partners__cta {
  margin: 26px 0 0;
}

.page-about .about-textlink {
  display: inline-block;
  color: var(--qs-lake);
  font-size: 15px;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

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

/* ---------- 收尾 ---------- */

.page-about .about-close {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-close .qs-eyebrow {
  color: var(--qs-lake-deep);
}

.page-about .about-close__head {
  max-width: 42em;
}

.page-about .about-close__title {
  margin: 10px 0 0;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.08;
  color: var(--qs-ink);
}

.page-about .about-close__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: #3B302A;
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-link {
  display: block;
  padding: 18px;
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid rgba(42, 33, 27, 0.18);
  border-top: 2px solid var(--qs-ink);
  text-decoration: none;
  transition: background-color 0.2s var(--qs-ease), border-color 0.2s var(--qs-ease),
    transform 0.2s var(--qs-ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: rgba(255, 255, 255, 0.75);
  border-top-color: var(--qs-orange-deep);
  transform: translateY(-2px);
}

.page-about .about-link__no {
  display: block;
  font-family: var(--qs-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--qs-orange-deep);
}

.page-about .about-link__t {
  display: block;
  margin-top: 8px;
  font-family: var(--qs-display);
  font-weight: 700;
  font-size: 21px;
  color: var(--qs-ink);
}

.page-about .about-link__d {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: #5A4B42;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team__item:nth-child(2) {
    transform: translateY(14px);
  }

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

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

@media (min-width: 900px) {
  .page-about {
    --about-rail-w: 168px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-chronicle__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--qs-header-h) + 28px);
    align-self: start;
    padding-top: clamp(32px, 6vw, 64px);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--qs-line);
  }

  .page-about .about-rail__list > li {
    flex: 0 0 auto;
  }

  .page-about .about-rail__item {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 11px 0 11px 14px;
    white-space: normal;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
  }

  .page-about .about-rail__item:hover,
  .page-about .about-rail__item:focus-visible {
    border-left-color: var(--qs-lime);
    background: linear-gradient(90deg, rgba(200, 244, 65, 0.12), transparent 78%);
  }

  .page-about .about-rail__label {
    font-size: 12px;
  }

  .page-about .about-spread__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-spread__grid > .about-spread__media {
    margin-top: 8px;
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .about-team__item:nth-child(2) {
    transform: translateY(20px);
  }

  .page-about .about-team__item:nth-child(3) {
    transform: translateY(10px);
  }

  .page-about .about-partners__band img {
    aspect-ratio: 21 / 8;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chart__bar,
  .page-about .about-link,
  .page-about .about-rail__item,
  .page-about .about-acc > summary::after {
    transition: none;
  }

  .page-about .about-link:hover,
  .page-about .about-link:focus-visible {
    transform: none;
  }
}
<<<END>>>