.page-about {
  --about-rail: 128px;
  --about-node-pad: clamp(26px, 4vw, 46px);
  display: block;
  overflow-x: hidden;
}

.page-about .ky-band {
  padding-block: clamp(48px, 7.5vw, 92px);
}

.page-about .about-hero {
  padding-top: clamp(104px, 13vw, 168px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero__crumb {
  margin-bottom: clamp(16px, 2.5vw, 28px);
}

.page-about .about-hero__title {
  margin: .35em 0 0;
  font-family: var(--ky-serif);
  font-weight: 900;
  font-size: var(--ky-fs-48);
  line-height: 1.16;
  letter-spacing: .005em;
  color: var(--ky-ink);
  max-width: 19ch;
  overflow-wrap: break-word;
}

.page-about .about-hero__lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  font-size: var(--ky-fs-18);
  line-height: 1.78;
  color: var(--ky-ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-hero__aside {
  margin-top: clamp(30px, 5vw, 0px);
}

.page-about .about-hero__aside-title {
  margin: 0 0 4px;
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-14);
  letter-spacing: .18em;
  color: var(--ky-steel);
}

.page-about .about-facts {
  margin: 0;
  border-top: 2px solid var(--ky-leaf);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--ky-line);
}

.page-about .about-facts dt {
  font-size: var(--ky-fs-14);
  color: var(--ky-steel);
  white-space: nowrap;
}

.page-about .about-facts dd {
  margin: 0;
  font-size: var(--ky-fs-14);
  color: var(--ky-ink);
  text-align: right;
}

.page-about .about-facts dd .ky-num {
  font-size: var(--ky-fs-18);
  font-weight: 600;
  color: var(--ky-leaf);
  margin-right: 2px;
}

.page-about .about-hero__figure {
  margin-top: clamp(34px, 5vw, 60px);
}

.page-about .about-hero__figure .ky-figure__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

/* ---------- 起点 ---------- */

.page-about .about-origin__quote {
  margin: 0 0 clamp(30px, 5vw, 52px);
  padding-left: clamp(18px, 3vw, 28px);
  border-left: 4px solid var(--ky-leaf);
}

.page-about .about-origin__quote p {
  margin: 0;
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: var(--ky-fs-32);
  line-height: 1.35;
  color: var(--ky-ink);
  max-width: 22ch;
}

.page-about .about-origin__quote cite {
  display: block;
  margin-top: 12px;
  font-family: var(--ky-hei);
  font-style: normal;
  font-size: var(--ky-fs-14);
  color: var(--ky-steel);
}

.page-about .about-origin__main .ky-section__title {
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-origin__main .ky-prose + .ky-prose {
  margin-top: 1em;
}

.page-about .about-origin__main a {
  color: var(--ky-leaf);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-origin__aside {
  margin-top: clamp(28px, 4vw, 0px);
  padding: clamp(20px, 3vw, 28px);
  background: var(--ky-canvas);
  border-radius: var(--ky-radius-lg);
}

.page-about .about-origin__aside-label {
  margin: 0 0 14px;
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-14);
  letter-spacing: .1em;
  color: var(--ky-leaf);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-origin__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 0;
  font-size: var(--ky-fs-16);
  line-height: 1.7;
  color: var(--ky-ink);
  border-top: 1px solid var(--ky-line);
}

.page-about .about-origin__list li .ky-num {
  flex: none;
  font-size: var(--ky-fs-14);
  color: var(--ky-gold);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-timeline__rail {
  position: static;
}

.page-about .about-timeline__rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__rail-list a {
  display: block;
  font-family: var(--ky-mono);
  font-size: var(--ky-fs-14);
  letter-spacing: .04em;
  color: var(--ky-steel);
  text-decoration: none;
  padding: 4px 0;
  transition: color .24s ease-out;
}

.page-about .about-timeline__rail-list a:hover,
.page-about .about-timeline__rail-list a:focus-visible {
  color: var(--ky-leaf);
}

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

.page-about .about-node {
  position: relative;
  padding: 2px 0 clamp(26px, 4vw, 44px) var(--about-node-pad);
  border-left: 1px solid var(--ky-line);
}

.page-about .about-node:last-child {
  padding-bottom: 4px;
  border-left-color: transparent;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ky-leaf);
  box-shadow: inset 0 0 0 2px var(--ky-gold);
}

.page-about .about-node__year {
  position: absolute;
  right: -6px;
  top: -14px;
  font-family: var(--ky-mono);
  font-size: clamp(52px, 13vw, 104px);
  font-weight: 700;
  line-height: .82;
  letter-spacing: -.05em;
  color: var(--ky-leaf);
  opacity: .07;
  pointer-events: none;
  user-select: none;
}

.page-about .about-node__index {
  margin: 0 0 6px;
  font-size: var(--ky-fs-12);
  letter-spacing: .16em;
  color: var(--ky-gold);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: var(--ky-fs-24);
  line-height: 1.35;
  color: var(--ky-ink);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 32em;
  font-size: var(--ky-fs-16);
  line-height: 1.78;
  color: var(--ky-steel);
}

.page-about .about-node__text a {
  color: var(--ky-leaf);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-timeline__texture {
  margin: clamp(30px, 5vw, 56px) 0 0;
  border-radius: var(--ky-radius-lg);
  overflow: hidden;
}

.page-about .about-timeline__texture .ky-figure__img {
  display: block;
  width: 100%;
  height: clamp(120px, 17vw, 200px);
  object-fit: cover;
  opacity: .82;
}

.page-about .about-timeline__texture .ky-figure__cap {
  padding-top: 10px;
}

/* ---------- 栏目结构 ---------- */

.page-about .about-columns__main .ky-prose + .about-rules {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-rules {
  list-style: none;
  counter-reset: about-rule;
  margin: 0;
  padding: 0;
}

.page-about .about-rules__item {
  position: relative;
  counter-increment: about-rule;
  padding: 18px 0 18px 52px;
  border-top: 1px solid var(--ky-line);
}

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

.page-about .about-rules__item::before {
  content: "0" counter(about-rule);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--ky-mono);
  font-size: var(--ky-fs-14);
  letter-spacing: .04em;
  color: var(--ky-gold);
}

.page-about .about-rules__item h3 {
  margin: 0 0 6px;
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-18);
  line-height: 1.5;
  color: var(--ky-ink);
}

.page-about .about-rules__item p {
  margin: 0;
  font-size: var(--ky-fs-14);
  line-height: 1.75;
  color: var(--ky-steel);
}

.page-about .about-columns__tail {
  margin-top: 1.4em;
}

.page-about .about-index {
  margin-top: clamp(28px, 4vw, 0px);
  padding: clamp(22px, 3vw, 30px);
  background: var(--ky-leaf-tint);
  border-radius: var(--ky-radius-lg);
}

.page-about .about-index__lead {
  margin: 0 0 16px;
  font-size: var(--ky-fs-14);
  line-height: 1.7;
  color: var(--ky-leaf);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid rgba(20, 80, 60, .16);
}

.page-about .about-index__item:last-child {
  border-bottom: 1px solid rgba(20, 80, 60, .16);
}

.page-about .about-index__num {
  font-size: var(--ky-fs-14);
  color: var(--ky-leaf);
  opacity: .68;
}

.page-about .about-index__name {
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-16);
  color: var(--ky-ink);
}

.page-about .about-index__name::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 1px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--ky-leaf);
}

.page-about .about-index__count {
  font-size: var(--ky-fs-14);
  color: var(--ky-steel);
}

.page-about .about-index__foot {
  margin: 14px 0 0;
  font-size: var(--ky-fs-12);
  color: var(--ky-steel);
}

/* ---------- 团队 ---------- */

.page-about .about-team__intro {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 6px 18px;
  align-items: baseline;
  padding: 18px 0;
  border-top: 1px solid var(--ky-line);
}

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

.page-about .about-team__figure {
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.page-about .about-team__figure .ky-num {
  font-size: var(--ky-fs-32);
  font-weight: 600;
  line-height: 1;
  color: var(--ky-leaf);
}

.page-about .about-team__unit {
  font-size: var(--ky-fs-12);
  color: var(--ky-steel);
}

.page-about .about-team__text h3 {
  margin: 0 0 5px;
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-18);
  color: var(--ky-ink);
}

.page-about .about-team__text p {
  margin: 0;
  font-size: var(--ky-fs-14);
  line-height: 1.75;
  color: var(--ky-steel);
}

.page-about .about-team__aside {
  margin-top: clamp(28px, 4vw, 0px);
}

.page-about .about-team__figure-photo .ky-figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--ky-radius-md);
}

/* ---------- 三审与同步 ---------- */

.page-about .about-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-steps__item {
  position: relative;
  padding: 16px 0 16px 24px;
  border-left: 1px solid var(--ky-line);
}

.page-about .about-steps__item:last-child {
  padding-bottom: 6px;
}

.page-about .about-steps__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ky-leaf);
}

.page-about .about-steps__num {
  display: block;
  font-size: var(--ky-fs-12);
  letter-spacing: .16em;
  color: var(--ky-gold);
  margin-bottom: 6px;
}

.page-about .about-steps__item h3 {
  margin: 0 0 6px;
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: var(--ky-fs-24);
  line-height: 1.35;
  color: var(--ky-ink);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: var(--ky-fs-14);
  line-height: 1.75;
  color: var(--ky-steel);
}

.page-about .about-review__foot {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 2px solid var(--ky-gold);
}

.page-about .about-review__foot p {
  margin: 0;
  max-width: 40em;
  font-size: var(--ky-fs-16);
  line-height: 1.78;
  color: var(--ky-ink);
}

.page-about .about-review__link {
  margin-top: 10px;
  font-size: var(--ky-fs-14);
  color: var(--ky-steel);
}

.page-about .about-review__link a {
  color: var(--ky-leaf);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作共建 ---------- */

.page-about .about-partners__eyebrow {
  color: var(--ky-gold-soft);
}

.page-about .about-partners__title {
  color: var(--ky-white);
}

.page-about .about-partners__note {
  color: rgba(255, 255, 255, .72);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-partners__block {
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, .24);
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--ky-mono);
  font-size: var(--ky-fs-68);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--ky-gold);
}

.page-about .about-partners__name {
  margin: 10px 0 8px;
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-18);
  color: var(--ky-white);
}

.page-about .about-partners__desc {
  margin: 0;
  max-width: 30em;
  font-size: var(--ky-fs-14);
  line-height: 1.78;
  color: rgba(255, 255, 255, .74);
}

.page-about .about-partners__themes {
  margin-top: clamp(30px, 4vw, 48px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid rgba(255, 255, 255, .24);
}

.page-about .about-partners__themes-label {
  margin: 0 0 14px;
  font-size: var(--ky-fs-12);
  letter-spacing: .16em;
  color: var(--ky-gold-soft);
}

.page-about .about-partners__themes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}

.page-about .about-partners__themes-list li {
  padding: 11px 0 11px 20px;
  position: relative;
  font-size: var(--ky-fs-16);
  line-height: 1.65;
  color: var(--ky-white);
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}

.page-about .about-partners__themes-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 8px;
  height: 1px;
  background: var(--ky-gold);
}

.page-about .about-partners__cta {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  font-size: var(--ky-fs-16);
  line-height: 1.75;
  color: rgba(255, 255, 255, .82);
}

.page-about .about-partners__cta a {
  color: var(--ky-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 继续往下看 ---------- */

.page-about .about-next {
  padding-block: clamp(34px, 5vw, 56px);
}

.page-about .about-next__lead {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: var(--ky-fs-24);
  line-height: 1.4;
  color: var(--ky-ink);
}

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

.page-about .about-next__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 0;
  border-top: 1px solid var(--ky-line);
}

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

.page-about .about-next__item a {
  font-family: var(--ky-hei);
  font-weight: 700;
  font-size: var(--ky-fs-18);
  color: var(--ky-leaf);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .24s ease-out;
}

.page-about .about-next__item a:hover,
.page-about .about-next__item a:focus-visible {
  border-bottom-color: var(--ky-gold);
}

.page-about .about-next__item span {
  font-size: var(--ky-fs-14);
  color: var(--ky-steel);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--ky-gold);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 平板及桌面 ---------- */

@media (min-width: 861px) {
  .page-about .about-hero__aside {
    margin-top: 0;
    padding-top: 6px;
  }

  .page-about .about-hero__figure {
    width: 58%;
    max-width: 760px;
  }

  .page-about .about-origin__aside {
    margin-top: 0;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 108px;
  }

  .page-about .about-timeline__rail-list {
    display: block;
    border-left: 1px solid var(--ky-line);
  }

  .page-about .about-timeline__rail-list li + li {
    margin-top: 2px;
  }

  .page-about .about-timeline__rail-list a {
    padding: 7px 0 7px 14px;
    margin-left: -1px;
    border-left: 2px solid transparent;
    transition: color .24s ease-out, border-color .24s ease-out;
  }

  .page-about .about-timeline__rail-list a:hover,
  .page-about .about-timeline__rail-list a:focus-visible {
    border-left-color: var(--ky-gold);
  }

  .page-about .about-index {
    margin-top: 0;
  }

  .page-about .about-team__aside {
    margin-top: 0;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(24px, 3.5vw, 44px);
    border-top: 2px solid var(--ky-gold);
  }

  .page-about .about-steps__item {
    padding: 26px 0 8px;
    border-left: 0;
  }

  .page-about .about-steps__item:last-child {
    padding-bottom: 8px;
  }

  .page-about .about-steps__item::before {
    left: 0;
    top: -6px;
    width: 10px;
    height: 10px;
  }

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

  .page-about .about-partners__themes-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(24px, 3vw, 44px);
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(24px, 3.5vw, 48px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: var(--ky-fs-68);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}