.page-about {
  --about-maxw: 44em;
  --about-pad: 24px;
}

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

.page-about .about-inline {
  color: var(--ref-yellow);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-inline:hover,
.page-about .about-inline:focus-visible {
  color: var(--whistle);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: 16px;
  padding-bottom: 34px;
}

.page-about .about-hero__copy {
  max-width: var(--about-maxw);
}

.page-about .about-hero h1 {
  margin: 14px 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-hero__lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--chalk);
}

.page-about .about-hero__sub {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-about .about-hero__fig {
  margin: 0;
  border: var(--edge);
  box-shadow: var(--shadow);
  background: var(--turf-800);
  overflow: hidden;
}

.page-about .about-hero__fig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体两栏：刻度尺 + 叙事流 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 56px;
}

.page-about .about-rail {
  border: var(--edge);
  box-shadow: var(--shadow);
  background: var(--turf-800);
  padding: 16px 16px 18px;
  min-width: 0;
}

.page-about .about-rail__cap {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ref-yellow);
  text-transform: uppercase;
}

.page-about .about-rail__svg {
  display: none;
  width: 100%;
  height: 560px;
  margin: 10px 0 0;
}

.page-about .about-rail__axis {
  stroke: var(--turf-700);
  stroke-width: 2;
  stroke-dasharray: 7 7;
}

.page-about .about-rail__dot {
  fill: var(--turf-900);
  stroke: var(--mist);
  stroke-width: 2;
}

.page-about .about-rail__dot--on {
  fill: var(--ref-yellow);
  stroke: var(--ink);
  stroke-width: 3;
}

.page-about .about-rail__dot--head {
  fill: var(--pen-red);
  stroke: var(--chalk);
  stroke-width: 3;
}

.page-about .about-rail__yr {
  font-family: var(--font-mono);
  font-size: 21px;
  letter-spacing: 0.04em;
  fill: var(--mist);
}

.page-about .about-rail__yr--on {
  fill: var(--ref-yellow);
}

.page-about .about-rail__yr--head {
  fill: var(--chalk);
}

.page-about .about-rail__mk {
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: 0.06em;
  fill: var(--violet-b);
}

.page-about .about-rail__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__chips li {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border: var(--edge-thin);
  background: var(--turf-700);
  color: var(--chalk);
}

.page-about .about-rail__note {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 叙事流 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 46px;
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-sec__idx {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ref-yellow);
}

.page-about .about-sec h2 {
  margin: 8px 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 2.9vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-sec h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .about-sec p {
  max-width: var(--about-maxw);
  font-size: 16px;
  line-height: 1.75;
  color: var(--chalk);
}

.page-about .about-sec p + p {
  margin-top: 14px;
}

/* ---------- 版本卡 ---------- */
.page-about .about-vers {
  display: grid;
  gap: 18px;
}

.page-about .about-ver {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 18px;
  border: var(--edge);
  box-shadow: var(--shadow);
  background: var(--turf-800);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.page-about .about-ver:hover {
  transform: translate(-4px, -4px);
  box-shadow: 10px 10px 0 var(--ink);
  background: var(--turf-700);
}

.page-about .about-ver__num {
  justify-self: start;
  margin: 0;
  padding: 8px 14px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--ref-yellow);
  border: var(--edge-thin);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 84% 100%, 0 100%);
}

.page-about .about-ver--v3 .about-ver__num {
  color: var(--chalk);
  background: linear-gradient(135deg, var(--violet-a), var(--violet-b));
}

.page-about .about-ver__when {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-ver__body p {
  max-width: var(--about-maxw);
  font-size: 16px;
  line-height: 1.75;
  color: var(--chalk);
}

.page-about .about-ver__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-ver__facts li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-ver__facts .mono {
  font-size: 18px;
  color: var(--ref-yellow);
  margin-right: 6px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__col {
  padding: 18px;
  border: var(--edge);
  box-shadow: var(--shadow);
  background: var(--turf-800);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(36px, 6vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ref-yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__col p {
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--chalk);
}

/* ---------- 图文对切 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 6px;
}

.page-about .about-split__fig {
  margin: 0;
  border: var(--edge);
  box-shadow: var(--shadow);
  background: var(--turf-800);
  overflow: hidden;
}

.page-about .about-split__fig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-split__body p {
  max-width: var(--about-maxw);
  font-size: 16px;
  line-height: 1.75;
  color: var(--chalk);
}

.page-about .about-split__body p + p {
  margin-top: 14px;
}

/* ---------- 读者规模 ---------- */
.page-about .about-readers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 22px 0;
  padding: 2px;
  list-style: none;
  background: var(--turf-700);
  border: var(--edge);
}

.page-about .about-readers__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--turf-800);
}

.page-about .about-readers__n {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .about-readers__lb {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 通栏图 ---------- */
.page-about .about-wide {
  margin: 0;
  border: var(--edge);
  border-top-width: 3px;
  box-shadow: var(--shadow);
  background: var(--turf-800);
  overflow: hidden;
}

.page-about .about-wide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-wide figcaption {
  padding: 12px 16px;
  border-top: var(--edge-thin);
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  background: var(--turf-800);
}

/* ---------- 合作图例 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 6px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__cell {
  position: relative;
  padding: 16px 16px 18px;
  border: var(--edge-thin);
  border-left-width: 6px;
  border-left-color: var(--ref-yellow);
  background: var(--turf-800);
}

.page-about .about-partners__mark {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 14px;
  height: 14px;
  border: var(--edge-thin);
}

.page-about .about-partners__mark--yellow { background: var(--ref-yellow); }
.page-about .about-partners__mark--red { background: var(--pen-red); }
.page-about .about-partners__mark--violet { background: linear-gradient(135deg, var(--violet-a), var(--violet-b)); }
.page-about .about-partners__mark--chalk { background: var(--chalk); }

.page-about .about-partners__n {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ref-yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__t {
  margin-top: 10px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--chalk);
}

/* ---------- 收束数据条 ---------- */
.page-about .about-strip {
  margin-top: 8px;
  border-top: var(--edge);
  border-bottom: var(--edge);
  background: linear-gradient(104deg, var(--violet-a), var(--violet-b));
}

.page-about .about-strip__inner {
  padding-top: 30px;
  padding-bottom: 30px;
}

.page-about .about-strip__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-strip__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-strip__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 3px solid rgba(245, 247, 242, 0.55);
}

.page-about .about-strip__num {
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .about-strip__lb {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--chalk);
  opacity: 0.85;
}

/* ---------- 页尾行动 ---------- */
.page-about .about-outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 34px;
  padding-bottom: 46px;
}

.page-about .about-outro__text {
  max-width: 40em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-readers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-strip__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 40px;
    padding-top: 28px;
    padding-bottom: 48px;
  }

  .page-about .about-ver {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-about .about-rail__svg {
    display: block;
  }

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

  .page-about .about-partners {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-ver {
    transition: none;
  }
  .page-about .about-ver:hover {
    transform: none;
  }
}