.page-about {
  --about-body-ink: #3D3733;
  --about-body-ink-dim: #5C554E;
  background: var(--ky-paper);
  color: var(--ky-ink);
  font-family: var(--ky-sans);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .ky-breadcrumb {
  padding-top: clamp(14px, 2vw, 22px);
  font-family: var(--ky-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ky-grey);
}
.page-about .ky-breadcrumb a {
  color: var(--ky-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .ky-breadcrumb a:hover {
  border-bottom-color: var(--ky-red);
  color: var(--ky-red);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--ky-sheet);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
  padding: clamp(28px, 5vw, 60px) 0 clamp(64px, 9vw, 104px);
  margin-top: clamp(10px, 2vw, 18px);
}
.page-about .about-hero__inner {
  position: relative;
}
.page-about .about-hero__kicker {
  display: inline-block;
  margin: 0;
  font-family: var(--ky-mono);
  font-size: 12px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ky-red);
  border-bottom: 2px solid var(--ky-red);
  padding-bottom: 5px;
}
.page-about .about-hero__title {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-family: var(--ky-sans);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -.025em;
  max-width: 18ch;
}
.page-about .about-hero__accent {
  color: var(--ky-red);
}
.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.82;
  color: var(--about-body-ink);
}

/* ---------- 横向赛季时间轴 ---------- */
.page-about .about-rail {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 18px;
}
.page-about .about-rail__node {
  min-width: 0;
}
.page-about .about-rail__link {
  display: block;
  position: relative;
  padding-top: 24px;
  border-top: 2px solid var(--ky-ink);
  text-decoration: none;
  color: inherit;
}
.page-about .about-rail__link::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ky-red);
  box-shadow: 0 0 0 4px var(--ky-sheet);
  transition: transform .2s ease;
}
.page-about .about-rail__link:hover::before,
.page-about .about-rail__link:focus-visible::before {
  transform: scale(1.35);
}
.page-about .about-rail__yr {
  display: block;
  font-family: var(--ky-mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--ky-ink);
}
.page-about .about-rail__lb {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ky-red);
}
.page-about .about-rail__tx {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--about-body-ink-dim);
}

/* ---------- 首屏通栏图 ---------- */
.page-about .about-shot {
  margin: 0;
  background: var(--ky-night);
}
.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 42px), 0 100%);
}
.page-about .about-shot__cap {
  display: block;
  padding: 14px 0 clamp(30px, 5vw, 52px);
  font-family: var(--ky-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--ky-sand);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  padding-top: clamp(28px, 5vw, 56px);
}
.page-about .about-railcol {
  min-width: 0;
}
.page-about .about-flow {
  display: grid;
  gap: clamp(38px, 6vw, 78px);
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: 120px;
  min-width: 0;
}
.page-about .about-chapter__head {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ky-ink);
  margin-bottom: clamp(16px, 2vw, 24px);
}
.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--ky-sans);
  font-weight: 900;
  font-size: clamp(20px, 3.1vw, 32px);
  line-height: 1.22;
  letter-spacing: -.015em;
  transition: color .2s ease;
}
.page-about .about-chapter:target .about-chapter__title {
  color: var(--ky-red);
}
.page-about .about-chapter__lead {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-body-ink-dim);
}
.page-about .about-prose {
  max-width: 66ch;
  font-size: 16.5px;
  line-height: 1.86;
  color: var(--about-body-ink);
}
.page-about .about-prose p {
  margin: 0 0 1.05em;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-prose--tail {
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 版本节点 ---------- */
.page-about .about-marks {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ky-ink);
}
.page-about .about-marks__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--ky-ink);
}
.page-about .about-marks__yr {
  font-family: var(--ky-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ky-red);
  line-height: 1;
}
.page-about .about-marks__body {
  min-width: 0;
}
.page-about .about-marks__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.01em;
}
.page-about .about-marks__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-body-ink);
}

/* ---------- 团队比例条 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
  margin-bottom: clamp(24px, 3.4vw, 36px);
}
.page-about .about-team__bar {
  min-width: 0;
}
.page-about .about-team__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.page-about .about-team__role {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
}
.page-about .about-team__num {
  font-family: var(--ky-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--ky-red);
  white-space: nowrap;
}
.page-about .about-team__track {
  height: 14px;
  background: var(--ky-sheet);
  border: 1px solid var(--ky-ink);
  overflow: hidden;
}
.page-about .about-team__fill {
  display: block;
  height: 100%;
  transition: filter .2s ease;
}
.page-about .about-team__fill--red {
  width: 36%;
  background: var(--ky-red);
}
.page-about .about-team__fill--ink {
  width: 64%;
  background: var(--ky-night);
}
.page-about .about-team__bar:hover .about-team__fill {
  filter: brightness(1.12);
}
.page-about .about-team__note {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--about-body-ink-dim);
}

/* ---------- 角色清单 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ky-ink);
  border: 1px solid var(--ky-ink);
}
.page-about .about-roles__item {
  background: var(--ky-paper);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx desc";
  column-gap: 12px;
  row-gap: 4px;
  align-items: baseline;
}
.page-about .about-roles__idx {
  grid-area: idx;
  font-family: var(--ky-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ky-red);
}
.page-about .about-roles__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
}
.page-about .about-roles__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-body-ink-dim);
}

/* ---------- 数据章节（夜场分屏） ---------- */
.page-about .about-chapter--night {
  background: var(--ky-night);
  color: var(--ky-paper);
  padding: clamp(24px, 4vw, 44px) clamp(20px, 3.4vw, 40px);
  clip-path: polygon(0 0, 100% 22px, 100% 100%, 0 calc(100% - 22px));
  scroll-margin-top: 120px;
}
.page-about .about-chapter--night .about-chapter__head--invert {
  border-bottom-color: var(--ky-sand);
}
.page-about .about-chapter--night .about-chapter__title {
  color: var(--ky-paper);
}
.page-about .about-chapter--night .ky-label {
  background: var(--ky-sand);
  color: var(--ky-ink);
}
.page-about .about-prose--invert {
  color: #D6D2C8;
}
.page-about .about-statline {
  margin-top: clamp(24px, 3.4vw, 36px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ky-panel);
  border: 1px solid var(--ky-panel);
}
.page-about .about-statline__cell {
  background: var(--ky-panel);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}
.page-about .about-statline__num {
  font-family: var(--ky-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ky-neon);
}
.page-about .about-statline__cap {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--ky-sand);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ky-ink);
  box-shadow: 6px 6px 0 var(--ky-sand);
}
.page-about .about-figure--inset {
  margin-top: clamp(22px, 3.4vw, 34px);
}
.page-about .about-figure__cap {
  margin-top: 14px;
  font-family: var(--ky-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .1em;
  color: var(--ky-grey);
}

/* ---------- 合作标签 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 30px);
}
.page-about .about-partners__group {
  border: 2px solid var(--ky-ink);
  box-shadow: 6px 6px 0 var(--ky-sand);
  background: var(--ky-paper);
  padding: clamp(18px, 2.6vw, 26px);
  min-width: 0;
}
.page-about .about-partners__tag {
  display: inline-block;
  background: var(--ky-sand);
  color: var(--ky-ink);
  border: 1px solid var(--ky-ink);
  font-family: var(--ky-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  padding: 4px 10px;
}
.page-about .about-partners__lead {
  margin: 16px 0 10px;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 900;
  letter-spacing: -.015em;
  line-height: 1.3;
}
.page-about .about-partners__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-body-ink);
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ky-ink);
  border: 1px solid var(--ky-ink);
}
.page-about .about-miles__item {
  background: var(--ky-paper);
  padding: clamp(18px, 2.6vw, 26px) clamp(16px, 2.4vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}
.page-about .about-miles__num {
  font-family: var(--ky-mono);
  font-size: clamp(36px, 7vw, 62px);
  font-weight: 700;
  line-height: .96;
  letter-spacing: -.04em;
  color: var(--ky-red);
}
.page-about .about-miles__unit {
  font-size: .34em;
  letter-spacing: .02em;
  margin-left: 6px;
  color: var(--ky-ink);
  font-weight: 700;
}
.page-about .about-miles__cap {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-body-ink-dim);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-call {
  border-top: 2px solid var(--ky-ink);
  padding-top: clamp(22px, 3.4vw, 34px);
}
.page-about .about-call__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 900;
  letter-spacing: -.015em;
  line-height: 1.25;
}
.page-about .about-call__text {
  margin: 0 0 clamp(20px, 2.8vw, 28px);
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-body-ink);
}
.page-about .about-call__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-miles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 22px;
  }
  .page-about .about-marks__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }
  .page-about .about-statline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-figure {
    max-width: 860px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 48px);
    align-items: start;
  }
  .page-about .about-railcol {
    position: sticky;
    top: 108px;
    align-self: start;
  }
  .page-about .about-hero__title {
    max-width: 20ch;
  }
  .page-about .about-hero__lede {
    padding-right: 6%;
  }
}

@media (min-width: 1280px) {
  .page-about .about-miles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link::before,
  .page-about .about-team__fill,
  .page-about .about-chapter__title {
    transition: none;
  }
  .page-about .ky-reveal {
    transform: none;
    opacity: 1;
  }
}