.page-about {
  --about-prose: 38em;
  --about-num: 68px;
  --about-pad-x: 20px;
  overflow-x: clip;
}

@media (min-width: 720px) {
  .page-about {
    --about-num: 100px;
  }
}

@media (min-width: 1080px) {
  .page-about {
    --about-num: 128px;
  }
}

/* 链接气质：绿阶常态，荧光青反馈 */
.page-about a {
  color: var(--green-500);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
  outline: none;
}

/* 页头 */
.page-about .about-head {
  padding-top: 32px;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-head__kicker {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--text-3);
}

.page-about .about-head__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -.025em;
  color: var(--text-1);
  max-width: 14em;
}

.page-about .about-head__lede {
  margin: 24px 0 0;
  max-width: var(--about-prose);
  font-size: var(--fs-18);
  line-height: 1.8;
  color: var(--text-2);
}

/* 章节骨架：大编号 + 阅读栏 */
.page-about .about-sec {
  padding-top: 56px;
  padding-bottom: 8px;
}

.page-about .about-sec__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 900px) {
  .page-about .about-sec__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 52px;
  }
}

.page-about .about-sec__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--about-num);
  line-height: .82;
  letter-spacing: -.045em;
  color: var(--green-500);
  opacity: .72;
  user-select: none;
}

.js .page-about .about-sec__num[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.js .page-about .about-sec__num[data-reveal].is-revealed {
  opacity: .72;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about .about-sec__num[data-reveal] {
    opacity: .72;
    transform: none;
    transition: none;
  }
}

.page-about .about-sec__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.26;
  letter-spacing: -.012em;
  color: var(--text-1);
}

.page-about .about-sec__lead {
  margin: 0;
  max-width: var(--about-prose);
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--text-3);
}

.page-about .prose p {
  margin: 0 0 1em;
  max-width: var(--about-prose);
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--text-2);
}

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

/* 02 团队：图左文右 */
.page-about .about-split {
  display: grid;
  gap: 24px;
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

.page-about .about-split__fig {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-split__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: .88;
  transition: opacity .3s var(--ease), transform .5s var(--ease);
}

.page-about .about-split__fig:hover img {
  opacity: 1;
  transform: scale(1.015);
}

/* 03 档案 */
.page-about .about-archive {
  margin-top: 30px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-archive {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }
}

.page-about .about-archive__figure {
  margin: 0;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 900px) {
  .page-about .about-archive__figure {
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }
}

.page-about .about-archive__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: .7;
}

@media (min-width: 900px) {
  .page-about .about-archive__figure img {
    height: 100%;
    aspect-ratio: auto;
  }
}

.page-about .about-archive__stats {
  margin: 0;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  align-content: center;
}

@media (min-width: 560px) and (max-width: 899px) {
  .page-about .about-archive__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

.page-about .about-stat__value {
  display: block;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat--accent .about-stat__value {
  color: var(--cyan-400);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--text-3);
}

/* 04 交叉校验 */
.page-about .about-verify {
  margin-top: 32px;
}

.page-about .about-verify__map {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

@media (min-width: 900px) {
  .page-about .about-verify__map {
    grid-template-columns: minmax(0, 1fr) 180px minmax(0, 1fr);
    align-items: center;
    gap: 28px;
    padding: 36px 32px;
  }
}

.page-about .about-verify__sources,
.page-about .about-verify__outcomes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-verify__source {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-left: 2px solid var(--green-500);
  background: rgba(18, 51, 40, .5);
  font-size: var(--fs-14);
  color: var(--text-1);
}

.page-about .about-verify__source span {
  font-size: var(--fs-12);
  color: var(--text-3);
}

.page-about .about-verify__node {
  display: grid;
  gap: 6px;
  justify-items: center;
  text-align: center;
  padding: 18px 12px;
  border: 1px solid var(--cyan-400);
  box-shadow: 0 0 0 6px rgba(111, 227, 176, .06);
}

.page-about .about-verify__node-label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-22);
  letter-spacing: -.01em;
  color: var(--cyan-400);
}

.page-about .about-verify__node-note {
  font-size: var(--fs-12);
  color: var(--text-3);
}

.page-about .about-verify__outcome {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-left: 2px solid var(--line);
  background: rgba(10, 33, 26, .7);
  font-size: var(--fs-14);
  color: var(--text-1);
}

.page-about .about-verify__outcome span {
  font-size: var(--fs-12);
  color: var(--text-3);
}

.page-about .about-verify__outcome--ok {
  border-left-color: var(--cyan-400);
}

.page-about .about-verify__outcome--back {
  border-left-color: var(--red-500);
}

/* 05 时间线 */
.page-about .about-band {
  margin: 0 0 36px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  opacity: .62;
}

.page-about .about-tl {
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 20px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(200px, 260px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-600) transparent;
}

.page-about .about-tl:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 6px;
}

.page-about .about-tl::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-tl::-webkit-scrollbar-thumb {
  background: var(--ink-600);
}

@media (min-width: 1080px) {
  .page-about .about-tl {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
  }
}

.page-about .about-tl__item {
  position: relative;
  scroll-snap-align: start;
  padding: 32px 20px 0 0;
  border-top: 1px solid var(--line);
  outline: none;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green-500);
  transition: background .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-visible::before {
  background: var(--cyan-400);
  box-shadow: 0 0 0 6px rgba(111, 227, 176, .16);
  transform: scale(1.2);
}

.page-about .about-tl__item:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 6px;
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-28);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl__title {
  margin: 8px 0 8px;
  font-size: var(--fs-16);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-400);
}

.page-about .about-tl__note {
  margin: 0;
  padding-right: 14px;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--text-3);
  transition: color .25s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__note,
.page-about .about-tl__item:focus-visible .about-tl__note {
  color: var(--text-2);
}

/* 06 合作与评审 */
.page-about .about-creds {
  margin-top: 6px;
  gap: 16px;
}

.page-about .about-creds .panel {
  padding: 22px 20px;
  transition: transform .25s var(--ease), background .25s var(--ease);
}

.page-about .about-creds .panel:hover {
  transform: translateY(-2px);
}

.page-about .about-creds h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  letter-spacing: -.01em;
  color: var(--text-1);
}

.page-about .about-creds p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-2);
}

/* 07 站点信息 */
.page-about .about-sec--meta {
  padding-bottom: 72px;
}

.page-about .about-meta {
  margin: 0 0 26px;
  max-width: 46em;
  border-top: 1px solid var(--line);
}

.page-about .about-meta__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 640px) {
  .page-about .about-meta__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-about .about-meta__row dt {
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--text-3);
}

.page-about .about-meta__row dd {
  margin: 0;
  font-size: var(--fs-16);
  color: var(--text-1);
}

.page-about .about-meta__lead {
  margin: 0;
  max-width: var(--about-prose);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--text-2);
}