.page-about {
  --pabout-papertex:
    radial-gradient(circle at 12% 18%, rgba(122,132,113,.07), transparent 42%),
    radial-gradient(circle at 84% 72%, rgba(180,100,60,.06), transparent 46%);
  --pabout-rule: repeating-linear-gradient(
    90deg, var(--ink) 0 6px, var(--red) 6px 12px, transparent 12px 22px
  );
}

/* ---------- 首屏框景 ---------- */
.page-about .hero-about {
  padding-block: clamp(28px, 4vw, 52px) clamp(36px, 5vw, 64px);
  background-image: var(--pabout-papertex);
}
.page-about .hero-about__frame {
  margin-top: clamp(18px, 2.6vw, 32px);
  background: var(--white);
}
.page-about .hero-about__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 48px);
  padding: clamp(22px, 3.2vw, 44px);
}
.page-about .hero-about__lead h1 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.08;
  font-size: clamp(28px, 5.4vw, 52px);
  margin: 10px 0 0;
  text-transform: none;
  color: var(--ink);
}
.page-about .hero-about__intro {
  margin-top: clamp(14px, 1.8vw, 22px);
  max-width: 62ch;
  font-size: clamp(15.5px, 1.15vw, 17.5px);
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .hero-about__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 40px);
  margin-top: clamp(20px, 2.6vw, 32px);
  padding-top: clamp(16px, 2vw, 24px);
  border-top: 1px solid var(--line);
}
.page-about .statblock {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 96px;
}
.page-about .statblock__num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1;
  color: var(--red);
}
.page-about .statblock__lab {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--stone);
}
.page-about .hero-about__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 30px);
}
.page-about .hero-about__figure {
  margin: 0;
  position: relative;
  align-self: start;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}
.page-about .hero-about__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.82) contrast(1.04);
}
.page-about .hero-about__figure .note {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--cool);
}

/* ---------- 通用章节头 ---------- */
.page-about .sechead {
  max-width: 74ch;
  margin-bottom: clamp(22px, 3vw, 40px);
}
.page-about .sechead h2 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.018em;
  line-height: 1.12;
  font-size: clamp(24px, 3.4vw, 40px);
  margin: 8px 0 0;
  color: var(--ink);
}
.page-about .section--dark .sechead h2,
.page-about .section--dark .kicker { color: var(--paper); }
.page-about .sechead__lead {
  margin-top: 14px;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 70ch;
}
.page-about .section--dark p { color: rgba(244,241,234,.86); }

/* ---------- 时间轴 ---------- */
.page-about #timeline {
  background-image: var(--pabout-papertex);
}
.page-about .axis {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px) clamp(12px, 2vw, 24px) clamp(14px, 2vw, 22px);
  background: var(--white);
  border: 1px solid var(--line);
  overflow: hidden;
}
.page-about .axis__scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--stone);
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-strong);
}
.page-about .axis__line {
  list-style: none;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  margin: 0;
  padding: 22px 0 0;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .axis__node {
  flex: 1 0 auto;
  min-width: 40px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 96px;
}
.page-about .axis__node::before {
  content: "";
  width: 2px;
  height: 46px;
  background: var(--stone);
  opacity: .55;
}
.page-about .axis__node--squad::before { height: 74px; background: var(--moss); opacity: 1; }
.page-about .axis__node--num::before { height: 62px; background: var(--clay); opacity: 1; }
.page-about .axis__node::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--line);
}
.page-about .axis__yr {
  position: absolute;
  top: 0;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  color: var(--ink-soft);
}
.page-about .axis__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 16px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}
.page-about .axis__key { position: relative; padding-left: 16px; }
.page-about .axis__key::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.page-about .axis__key--squad::before { background: var(--moss); }
.page-about .axis__key--num::before { background: var(--clay); }

/* ---------- 折叠档案夹 ---------- */
.page-about .foldgroup {
  margin-top: clamp(22px, 3vw, 36px);
  border-top: 2px solid var(--ink);
}
.page-about .fold {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}
.page-about .fold__head {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 14px;
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: var(--ink);
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}
.page-about .fold__head:hover { background: var(--cool); }
.page-about .fold[data-open="true"] .fold__head {
  border-left-color: var(--red);
  background: var(--cool);
}
.page-about .fold__idx {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--teal);
  white-space: nowrap;
}
.page-about .fold__title {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 19px);
  letter-spacing: -.01em;
}
.page-about .fold__chev {
  font-family: var(--f-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--stone);
}
.page-about .fold[data-open="true"] .fold__chev { color: var(--red); }
.page-about .fold__panel .fold__body {
  padding: 4px 14px 20px;
}
.page-about .fold__body p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 68ch;
}
.page-about .fieldlist {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}
.page-about .fieldlist__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 2px;
  border-bottom: 1px solid var(--line);
  background: transparent;
}
.page-about .fieldlist__row:nth-child(odd) { background: rgba(232,232,232,.5); }
.page-about .fieldlist dt {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}
.page-about .fieldlist dd {
  margin: 0;
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 号码筛选 ---------- */
.page-about .numgrid { gap: clamp(24px, 3.4vw, 48px); }
.page-about .numgrid__main h2 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.018em;
  line-height: 1.12;
  font-size: clamp(24px, 3.4vw, 38px);
  margin: 8px 0 0;
}
.page-about .numgrid__main .tagbar {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .numgrid__main .tag {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  background: var(--white);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .numgrid__main .tag[aria-pressed="true"] {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}
.page-about .numtable {
  margin-top: clamp(22px, 3vw, 32px);
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.page-about .numtable__cap {
  text-align: left;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
  padding-bottom: 10px;
}
.page-about .numtable th,
.page-about .numtable td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
.page-about .numtable thead th {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink);
}
.page-about .numtable tbody tr:nth-child(even) { background: var(--cool); }
.page-about .numtable tbody td:first-child {
  font-family: var(--f-mono);
  font-weight: 600;
  white-space: nowrap;
}
.page-about .numgrid__side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-about .mediacard {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--white);
}
.page-about .mediacard img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .mediacard .note {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--cool);
}
.page-about .sidecard {
  padding: 18px;
  background: var(--ink);
  color: var(--paper);
}
.page-about .sidecard h3 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
  margin: 0 0 12px;
  color: var(--cyan);
}
.page-about .sidecard__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .sidecard__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244,241,234,.85);
}
.page-about .sidecard__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

/* ---------- 阵容沿革 ---------- */
.page-about .squadgrid { align-items: start; gap: clamp(24px, 3.4vw, 48px); }
.page-about .squadgrid__text h2 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.018em;
  line-height: 1.12;
  font-size: clamp(24px, 3.4vw, 38px);
  margin: 8px 0 0;
  color: var(--paper);
}
.page-about .squadgrid__text p {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.82;
  max-width: 66ch;
}
.page-about .squadlist {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .squadlist li {
  display: grid;
  grid-template-columns: minmax(96px, auto) 1fr;
  gap: 14px;
  padding: 12px 14px;
  background: var(--ink-soft);
}
.page-about .squadlist__k {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}
.page-about .squadlist__v {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244,241,234,.88);
}
.page-about .squadgrid__figure {
  border-color: var(--line-dark);
  background: var(--ink-soft);
}
.page-about .squadgrid__figure .note {
  background: var(--ink-soft);
  color: rgba(244,241,234,.72);
  border-top-color: var(--line-dark);
}

/* ---------- 归档卡片 ---------- */
.page-about .archgrid { gap: clamp(18px, 2.4vw, 30px); }
.page-about .archcard {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px) clamp(18px, 2vw, 24px);
  background: var(--white);
  border-top: 4px solid var(--ink);
  overflow: hidden;
}
.page-about .archcard:nth-child(2) { border-top-color: var(--moss); margin-top: 0; }
.page-about .archcard:nth-child(3) { border-top-color: var(--clay); }
.page-about .archcard__idx {
  display: block;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--stone);
  margin-bottom: 10px;
}
.page-about .archcard h3 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 21px);
  letter-spacing: -.01em;
  margin: 0 0 10px;
  color: var(--ink);
}
.page-about .archcard p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 理念与承诺 ---------- */
.page-about .promise {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(24px, 3.4vw, 44px);
  background: var(--white);
  border-left: 6px solid var(--red);
  background-image:
    repeating-linear-gradient(135deg, rgba(200,16,46,.045) 0 3px, transparent 3px 12px);
}
.page-about .promise__head h2 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.018em;
  line-height: 1.12;
  font-size: clamp(24px, 3.4vw, 38px);
  margin: 8px 0 0;
  color: var(--ink);
}
.page-about .promise__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-soft);
  max-width: 72ch;
}
.page-about .promise__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 相关入口 ---------- */
.page-about .relgrid { gap: clamp(14px, 2vw, 24px); }
.page-about .relcard {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--white);
  border: 1px solid var(--line);
  border-bottom: 4px solid var(--ink);
  text-decoration: none;
  color: var(--ink);
  transition: background-color .24s var(--ease), border-color .24s var(--ease);
}
.page-about .relcard:hover {
  background: var(--cool);
  border-bottom-color: var(--red);
}
.page-about .relcard__lab {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 20px);
  letter-spacing: -.01em;
}
.page-about .relcard__txt {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-soft);
}
.page-about .relcard__go {
  font-family: var(--f-mono);
  font-size: 15px;
  color: var(--red);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .fieldlist { grid-template-columns: 1fr 1fr; }
  .page-about .fieldlist__row:nth-child(4n),
  .page-about .fieldlist__row:nth-child(4n+3) { border-right: 0; }
  .page-about .axis__node { min-width: 52px; }
  .page-about .promise { grid-template-columns: minmax(200px, 22%) 1fr; }
}

@media (min-width: 960px) {
  .page-about .hero-about__inner {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }
  .page-about .numgrid { grid-template-columns: 1.6fr .9fr; }
  .page-about .squadgrid { grid-template-columns: 1.05fr .95fr; }
  .page-about .archgrid { grid-template-columns: repeat(3, 1fr); }
  .page-about .archcard:nth-child(2) { margin-top: 26px; }
  .page-about .relgrid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 699px) {
  .page-about .axis__line { padding-top: 26px; }
  .page-about .axis__node { min-width: 34px; height: 84px; }
  .page-about .axis__yr { font-size: 10px; }
  .page-about .numtable { font-size: 13.5px; }
  .page-about .numtable th,
  .page-about .numtable td { padding: 9px 8px; }
  .page-about .squadlist li { grid-template-columns: 1fr; gap: 4px; }
  .page-about .fold__head { grid-template-columns: auto 1fr auto; gap: 10px; padding: 14px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .fold__head,
  .page-about .relcard,
  .page-about .numgrid__main .tag { transition: none; }
}