.page-about {
  --ab-body: rgba(233, 238, 246, 0.8);
  --ab-indigo: #8F7EE8;
  --ab-rail: 152px;
  padding-bottom: 48px;
}

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

/* ── 开场 ── */
.page-about .ab-open {
  display: grid;
  gap: 30px;
  padding-top: 30px;
  padding-bottom: 52px;
}

.page-about .ab-open__title {
  margin: 16px 0 18px;
  font-size: clamp(34px, 7.4vw, 56px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--wk-text);
  text-shadow: 0 0 34px rgba(255, 106, 26, 0.18);
}

.page-about .ab-open__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: var(--ab-body);
  max-width: 46ch;
}

.page-about .ab-open__meta {
  margin: 20px 0 0;
  font-family: var(--wk-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--wk-ice);
}

.page-about .ab-open__figure {
  margin: 0;
}

.page-about .ab-open__figure .wk-media {
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--wk-line);
  box-shadow: 0 26px 60px -30px rgba(255, 106, 26, 0.35);
}

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

.page-about .ab-cap {
  margin-top: 10px;
  font-family: var(--wk-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--wk-muted);
}

/* ── 长卷章节 ── */
.page-about .ab-chapter {
  display: grid;
  gap: 18px;
  padding: 44px 0 50px;
  border-top: 1px solid var(--wk-line);
}

.page-about .ab-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .ab-rail__key {
  position: relative;
  padding-left: 18px;
  font-family: var(--wk-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--wk-gold);
}

.page-about .ab-rail__key::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4.5px;
  border-radius: 50%;
  background: var(--wk-gold);
  box-shadow: 0 0 0 4px rgba(216, 169, 59, 0.16);
}

.page-about .ab-vnote {
  font-family: var(--wk-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--wk-muted);
}

.page-about .ab-body h2 {
  margin: 0 0 18px;
  font-size: clamp(24px, 4.6vw, 36px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--wk-text);
}

.page-about .ab-body > p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ab-body);
  max-width: 62ch;
}

.page-about .ab-body > p:last-child {
  margin-bottom: 0;
}

/* ── 规模数字 ── */
.page-about .ab-figures {
  display: grid;
  gap: 22px;
  margin-top: 30px;
  padding: 26px 22px;
  border-radius: var(--wk-radius);
  background: var(--wk-solid);
  border: 1px solid var(--wk-line);
}

.page-about .ab-fig {
  padding-top: 16px;
  border-top: 2px solid var(--wk-line);
}

.page-about .ab-fig:nth-child(1) {
  border-top-color: var(--wk-lava);
}

.page-about .ab-fig:nth-child(2) {
  border-top-color: var(--wk-ice);
}

.page-about .ab-fig:nth-child(3) {
  border-top-color: var(--wk-gold);
}

.page-about .ab-fig__num {
  display: block;
  font-family: var(--wk-mono);
  font-size: clamp(44px, 9vw, 70px);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.02em;
  color: var(--wk-text);
}

.page-about .ab-fig__unit {
  margin-left: 6px;
  font-size: 0.3em;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--wk-ice);
}

.page-about .ab-fig__label {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--wk-muted);
}

/* ── 团队三线 ── */
.page-about .ab-crews {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .ab-crew {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--wk-radius);
  background: var(--wk-solid);
  border: 1px solid var(--wk-line);
  transition: transform 0.28s ease, border-color 0.28s ease;
}

.page-about .ab-crew::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--wk-radius) var(--wk-radius) 0 0;
}

.page-about .ab-crew--report::before {
  background: var(--wk-lava);
}

.page-about .ab-crew--sched::before {
  background: var(--wk-ice);
}

.page-about .ab-crew--move::before {
  background: var(--ab-indigo);
}

.page-about .ab-crew:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.22);
}

.page-about .ab-crew h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--wk-text);
}

.page-about .ab-crew p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ab-body);
}

/* ── 通用插图 ── */
.page-about .ab-shot {
  margin: 30px 0 0;
}

.page-about .ab-shot .wk-media {
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--wk-line);
}

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

/* ── 更新节奏 ── */
.page-about .ab-beats {
  display: grid;
  margin-top: 28px;
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--wk-line);
}

.page-about .ab-beat {
  --beat: var(--wk-gold);
  display: grid;
  gap: 6px;
  padding: 18px 22px;
  background: var(--wk-solid);
  border-left: 3px solid var(--beat);
}

.page-about .ab-beat:nth-child(2) {
  --beat: var(--wk-neon);
}

.page-about .ab-beat:nth-child(3) {
  --beat: var(--wk-ice);
}

.page-about .ab-beat + .ab-beat {
  border-top: 1px solid var(--wk-line);
}

.page-about .ab-beat__t {
  font-family: var(--wk-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--beat);
}

.page-about .ab-beat__d {
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--ab-body);
}

/* ── 标准与协作 ── */
.page-about .ab-rules {
  display: grid;
  gap: 14px;
  margin: 26px 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-rules li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ab-body);
}

.page-about .ab-rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 14px;
  height: 2px;
  background: linear-gradient(90deg, var(--wk-lava), var(--wk-gold));
}

.page-about .ab-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ── 继续浏览 ── */
.page-about .ab-next {
  display: grid;
  gap: 14px;
  padding-top: 38px;
}

.page-about .ab-next__item {
  display: block;
  padding: 22px 24px;
  border-radius: var(--wk-radius);
  border: 1px solid var(--wk-line);
  background: var(--wk-glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-decoration: none;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-next__item:hover,
.page-about .ab-next__item:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 26, 0.5);
}

.page-about .ab-next__k {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--wk-text);
}

.page-about .ab-next__d {
  display: block;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--wk-muted);
}

/* ── 桌面版：左窄刻度 + 右宽正文 ── */
@media (min-width: 860px) {
  .page-about .ab-open {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    gap: 48px;
    padding-top: 52px;
    padding-bottom: 76px;
  }

  .page-about .ab-chapter {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 46px;
    padding: 56px 0 66px;
  }

  .page-about .ab-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .ab-rail__key {
    font-size: 34px;
  }

  .page-about .ab-vnote {
    writing-mode: vertical-rl;
    text-orientation: upright;
  }
}

@media (min-width: 700px) {
  .page-about .ab-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
    padding: 30px 28px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-crews {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 720px) {
  .page-about .ab-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-crew,
  .page-about .ab-next__item {
    transition: none;
  }

  .page-about .ab-crew:hover,
  .page-about .ab-next__item:hover,
  .page-about .ab-next__item:focus-visible {
    transform: none;
  }
}