.page-about {
  --about-line: rgba(217, 164, 65, 0.24);
  --about-line-soft: rgba(242, 239, 233, 0.12);
  --about-pad: clamp(3rem, 7vw, 6rem);
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(110% 85% at 90% 0%, rgba(200, 52, 43, 0.22), transparent 58%),
    radial-gradient(90% 90% at -10% 115%, rgba(12, 38, 36, 0.95), transparent 62%),
    var(--ink);
  border-bottom: 2px solid var(--about-line);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__title {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5vw, 3.6rem);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--ivory);
  text-wrap: balance;
  border-left: 6px solid var(--cinnabar);
  padding-left: clamp(0.75rem, 2vw, 1.5rem);
}

.page-about .about-hero__lede {
  margin-top: clamp(1rem, 2.5vw, 1.5rem);
  max-width: 60ch;
  color: var(--ivory);
}

.page-about .about-hero__aside {
  border: 2px solid var(--about-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
  padding: clamp(1rem, 3vw, 1.5rem);
  align-self: end;
}

.page-about .about-hero__aside-label {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-hero__facts li {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) 1fr;
  align-items: baseline;
  gap: 0.75rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-hero__facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.04em;
}

.page-about .about-fact__txt {
  font-size: 0.92rem;
  color: var(--stone);
  line-height: 1.5;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
  position: relative;
}

.page-about .about-section--jade {
  background:
    linear-gradient(180deg, rgba(12, 38, 36, 0.95), rgba(10, 11, 14, 0.9)),
    var(--jade-deep);
  border-top: 2px solid var(--about-line);
  border-bottom: 2px solid var(--about-line);
}

.page-about .about-sec-head {
  display: grid;
  gap: 0.7rem;
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-sec-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .about-sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--ivory);
  text-wrap: balance;
}

.page-about .about-sub-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  line-height: 1.35;
  color: var(--gold-light);
}

.page-about .about-body {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(242, 239, 233, 0.86);
}

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

/* ---------- 两栏错位 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3.5rem);
}

.page-about .about-split > * {
  min-width: 0;
}

.page-about .about-identity__fig {
  margin: 0;
}

.page-about .about-timeline__fig,
.page-about .about-cats__fig {
  margin: 0;
}

/* ---------- 定位规格表 ---------- */
.page-about .about-spec {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--about-line);
}

.page-about .about-spec__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 1rem 0 1.1rem;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-spec dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-spec dd {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: rgba(242, 239, 233, 0.84);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 1.1rem 0 1.3rem;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .tl__item:first-child {
  border-top: 2px solid var(--about-line);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cinnabar);
  line-height: 1;
}

.page-about .tl__title {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--ivory);
}

.page-about .tl__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: rgba(242, 239, 233, 0.82);
}

.page-about .about-timeline__fig {
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

/* ---------- 分类矩阵 ---------- */
.page-about .about-cats__split {
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .cat {
  position: relative;
  border: 2px solid var(--about-line);
  background: var(--ink-2);
  padding: 1.1rem 1.1rem 1.25rem;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .cat::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.page-about .cat:hover,
.page-about .cat:focus-within {
  transform: translate(-2px, -3px);
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
}

.page-about .cat:hover::after,
.page-about .cat:focus-within::after {
  transform: scaleX(1);
}

.page-about .cat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .cat__name {
  margin: 0.5rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ivory);
}

.page-about .cat__meta {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-about .cat__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .cat__tags .tag {
  font-size: 0.76rem;
  line-height: 1.4;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--about-line-soft);
  color: rgba(242, 239, 233, 0.74);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .cat:hover .tag,
.page-about .cat:focus-within .tag {
  border-color: rgba(217, 164, 65, 0.5);
  color: var(--gold-light);
  background: rgba(217, 164, 65, 0.08);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .team-card {
  display: grid;
  align-content: start;
  gap: 0.5rem;
  padding: 1.25rem 1.15rem 1.35rem;
}

.page-about .team-card .card__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
  margin: 0;
}

.page-about .team-card .card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ivory);
}

.page-about .team-card .card__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(242, 239, 233, 0.8);
}

/* ---------- 覆盖 ---------- */
.page-about .about-reach {
  background:
    linear-gradient(180deg, rgba(110, 27, 27, 0.22), transparent 70%),
    var(--ink);
  border-top: 2px solid var(--about-line);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
  align-items: start;
}

.page-about .reach-panel {
  border: 2px solid var(--about-line);
  background: var(--ink-2);
  box-shadow: var(--shadow);
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.page-about .reach-panel__label {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-about .reach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .reach-list li {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) 1fr;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .reach-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .reach-list__num {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  font-weight: 700;
  color: var(--jade);
  letter-spacing: 0.02em;
}

.page-about .reach-list__txt {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 客服 ---------- */
.page-about .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .support-tile {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  padding: 1.25rem 1.15rem 1.35rem;
  border: 2px solid var(--about-line);
  border-left: 6px solid var(--cinnabar);
  background: var(--ink-2);
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .support-tile:hover,
.page-about .support-tile:focus-visible {
  transform: translate(-2px, -3px);
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
}

.page-about .support-tile__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .support-tile__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ivory);
}

.page-about .support-tile__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(242, 239, 233, 0.8);
}

.page-about .support-tile__go {
  margin-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 收束 CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding: clamp(1.25rem, 3.5vw, 2rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: center;
  border: 2px solid var(--about-line);
  background: linear-gradient(120deg, rgba(12, 38, 36, 0.85), rgba(10, 11, 14, 0.95));
  box-shadow: var(--shadow);
}

.page-about .about-cta__text h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.6vw, 1.65rem);
  color: var(--ivory);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(242, 239, 233, 0.78);
}

.page-about .about-cta__actions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .cat-grid,
  .page-about .team-grid,
  .page-about .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-split--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .about-split--flip > .about-cats__note {
    order: 2;
  }

  .page-about .about-identity__fig {
    margin-top: -3.5rem;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 6fr) auto;
  }

  .page-about .tl {
    padding-left: 0.25rem;
  }

  .page-about .tl::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 2.4rem;
    bottom: 1.5rem;
    width: 2px;
    background: linear-gradient(180deg, rgba(200, 52, 43, 0.75), rgba(200, 52, 43, 0.1));
  }

  .page-about .tl__item {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 1.75rem;
    padding-left: 2.75rem;
    border-top: 0;
    border-bottom: 1px solid var(--about-line-soft);
  }

  .page-about .tl__item:first-child {
    border-top: 0;
  }

  .page-about .tl__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1.55rem;
    width: 1rem;
    height: 1rem;
    background: var(--ink);
    border: 2px solid var(--cinnabar);
    transform: rotate(45deg);
  }

  .page-about .tl__year {
    padding-top: 0.9rem;
  }
}

@media (min-width: 1080px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .cat,
  .page-about .support-tile,
  .page-about .cat::after,
  .page-about .cat__tags .tag {
    transition: none;
  }

  .page-about .cat:hover,
  .page-about .cat:focus-within,
  .page-about .support-tile:hover,
  .page-about .support-tile:focus-visible {
    transform: none;
  }
}