.page-about {
  --ab-title: clamp(34px, 8.4vw, 76px);
  --ab-quote: clamp(24px, 5vw, 46px);
  --ab-measure: 620px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 4vw, 40px) 0 var(--block);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: var(--ab-title);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__text {
  margin: 22px 0 0;
  max-width: var(--ab-measure);
  font-size: var(--fs-lead);
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts > div {
  background: var(--panel);
  padding: 15px 16px;
  min-width: 0;
}

.page-about .about-fact__k {
  margin: 0;
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-fact__v {
  margin: 7px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  font-weight: 600;
  color: var(--cyan);
  line-height: 1.3;
}

.page-about .about-hero__figure {
  margin: 0;
  overflow: hidden;
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 42px);
}

.page-about .about-lane {
  min-width: 0;
  padding-top: 18px;
  border-top: 2px solid var(--edge);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-lane:hover,
.page-about .about-lane:focus-within {
  border-top-color: var(--cyan);
}

.page-about .about-lane__idx {
  display: block;
  font-size: var(--fs-index);
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-lane__title {
  margin: 10px 0 0;
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
  line-height: 1.25;
}

.page-about .about-lane p {
  margin: 14px 0 0;
  max-width: 44ch;
  color: var(--muted);
  line-height: 1.78;
}

.page-about .about-lane__note {
  padding-left: 13px;
  border-left: 2px solid var(--line);
  font-size: var(--fs-small);
  opacity: 0.62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-lane:hover .about-lane__note,
.page-about .about-lane:focus-within .about-lane__note {
  opacity: 1;
  color: var(--white);
  border-left-color: var(--cyan);
}

/* ---------- 引言带 ---------- */
.page-about .about-quote {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(36px, 7vw, 84px) 0;
  background:
    radial-gradient(120% 180% at 0% 0%, rgba(0, 229, 208, 0.08), transparent 62%);
}

.page-about .about-quote__text {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: var(--ab-quote);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-quote__by {
  margin: 22px 0 0;
  font-size: var(--fs-index);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 版本历程 ---------- */
.page-about .about-versions__filter {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(38px, 6vw, 70px);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-about .about-timeline__item--major .about-timeline__dot {
  left: -38px;
  top: 3px;
  width: 22px;
  height: 22px;
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-timeline__body {
  max-width: 660px;
  min-width: 0;
}

.page-about .about-timeline__ver {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-timeline__item--current .about-timeline__ver {
  color: var(--orange);
}

.page-about .about-timeline__name {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-timeline__body p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-timeline__figure {
  margin: 22px 0 0;
  overflow: hidden;
}

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

.page-about .about-timeline__more {
  margin-top: 16px;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 208, 0.42);
  padding-bottom: 2px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .about-versions__note {
  margin: clamp(26px, 4vw, 42px) 0 0;
  max-width: var(--ab-measure);
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 内容标准 ---------- */
.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-sub {
  margin: 0;
  font-size: var(--fs-index);
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-blocks {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-blocks li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  background: var(--panel);
  padding: 14px 16px;
  color: var(--white);
  font-size: var(--fs-body);
  line-height: 1.5;
}

.page-about .about-blocks .num {
  color: var(--cyan);
  font-size: var(--fs-index);
  letter-spacing: 0.1em;
  flex: none;
}

.page-about .about-standard__text {
  margin: 20px 0 0;
  max-width: var(--ab-measure);
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .about-side__card {
  background: var(--panel);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  padding: 22px 22px 24px;
}

.page-about .about-side__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.005em;
}

.page-about .about-side__card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.8;
}

/* ---------- 看球半径 ---------- */
.page-about .about-local__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-about .about-local__figure {
  margin: 0;
  overflow: hidden;
}

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

.page-about .about-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-scene {
  padding-left: 16px;
  border-left: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-scene:hover {
  border-left-color: var(--cyan);
}

.page-about .about-scene__t {
  margin: 0;
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-scene__d {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.78;
}

.page-about .about-local__note {
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  font-size: var(--fs-small);
  color: var(--muted);
  line-height: 1.8;
}

/* ---------- 合作方向 ---------- */
.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-partner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-partner:hover {
  background: rgba(14, 23, 41, 0.72);
}

.page-about .about-partner__num {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-partner__name {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.005em;
}

.page-about .about-partner__desc {
  margin: 0;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.8;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-bottom: var(--block);
}

.page-about .about-cta__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
  border-top: 2px solid var(--edge);
  padding-top: 28px;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 44ch;
  font-size: var(--fs-lead);
  line-height: 1.65;
  color: var(--white);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

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

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

@media (min-width: 860px) {
  .page-about .about-team__grid {
    grid-template-columns: 1.15fr 0.95fr 0.72fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, 1fr);
  }

  .page-about .about-hero__figure {
    margin-top: 44px;
  }

  .page-about .about-standard__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.86fr);
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .about-partner {
    grid-template-columns: 62px minmax(0, 0.85fr) minmax(0, 1.5fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .about-partner__num {
    padding-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-lane,
  .page-about .about-lane__note,
  .page-about .about-scene,
  .page-about .about-partner,
  .page-about .about-inline-link {
    transition: none;
  }
}