.page-about {
  --about-maxw: 1360px;
  --about-rail: 104px;
  display: block;
  padding-block: clamp(22px, 4vw, 46px) clamp(52px, 8vw, 110px);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--about-maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__copy .crumbs {
  margin-bottom: 18px;
}

.page-about .about-hero__copy .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -.03em;
  color: var(--white);
  margin: 0 0 18px;
  max-width: 18em;
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  line-height: 1.78;
  color: var(--muted);
  max-width: 46ch;
  margin: 0 0 26px;
}

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

.page-about .about-hero__visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
  box-shadow: var(--shadow-panel);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(1.08) contrast(1.05);
}

.page-about .about-hero__plate {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: linear-gradient(180deg, rgba(6, 8, 18, .2), rgba(6, 8, 18, .92));
  border-top: 1px solid rgba(34, 211, 238, .28);
}

.page-about .about-hero__plate-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .about-hero__plate-key {
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-hero__plate-val {
  color: var(--white);
  font-size: 13px;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  max-width: var(--about-maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  padding-block: clamp(38px, 6vw, 82px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  border-top: 1px solid var(--line-soft);
  margin-top: clamp(30px, 5vw, 64px);
}

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

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.6rem, 8vw, 4rem);
  line-height: .84;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(124, 77, 255, .62);
}

.page-about .about-chapter__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--white);
  margin: 0 0 14px;
}

.page-about .about-chapter__lede {
  font-size: clamp(.98rem, 1.25vw, 1.08rem);
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 26px;
}

/* ---------- 01 三根支柱 ---------- */
.page-about .about-pillars {
  gap: 16px;
}

.page-about .about-pillar {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(155deg, var(--ink-800), var(--ink-850));
  transition: transform .22s ease, border-color .22s ease;
}

.page-about .about-pillar:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-pillar__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-pillar__name {
  font-family: var(--font-head);
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-pillar__text {
  font-size: .94rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

/* ---------- 02 团队档案卡 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-team__card {
  position: relative;
  padding: 24px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, var(--ink-800) 0%, var(--ink-850) 70%);
  box-shadow: var(--shadow-panel);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.page-about .about-team__card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 46px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: var(--neon);
  transition: background .22s ease;
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 22px 46px -26px rgba(34, 211, 238, .55);
}

.page-about .about-team__card:hover::after {
  background: var(--cyan);
}

.page-about .about-team__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .about-team__name {
  font-family: var(--font-head);
  font-size: 1.14rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0;
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
  white-space: nowrap;
}

.page-about .about-team__desc {
  font-size: .92rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0 0 16px;
}

.page-about .about-team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ---------- 03 覆盖版图 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

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

.page-about .about-cover__map img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-cover__panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(18, 20, 58, .95), rgba(6, 8, 18, .95));
  padding: 18px 18px 22px;
}

.page-about .about-cover .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 16px;
}

.page-about .about-cover__panel-body h3 {
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-cover__panel-body p {
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
  margin: 0 0 14px;
}

.page-about .about-cover__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-cover__list li {
  position: relative;
  padding-left: 18px;
  font-size: .89rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-cover__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 04 时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 2px;
  counter-reset: tl;
}

.page-about .about-tl__item {
  position: relative;
  padding: 20px 20px 20px 26px;
  border-left: 2px solid rgba(199, 210, 224, .18);
  background: linear-gradient(90deg, rgba(124, 77, 255, .07), transparent 62%);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: border-color .22s ease, background .22s ease, transform .22s ease;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--neon);
  transition: border-color .22s ease, box-shadow .22s ease;
}

.page-about .about-tl__item:hover {
  border-left-color: var(--cyan);
  transform: translateX(4px);
}

.page-about .about-tl__item:hover::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 211, 238, .14);
}

.page-about .about-tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding: 3px 10px;
  border: 1px solid rgba(34, 211, 238, .35);
  border-radius: var(--radius-pill);
}

.page-about .about-tl__title {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0;
}

.page-about .about-tl__text {
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
  margin: 0;
  max-width: 60ch;
}

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

.page-about .about-tl__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-allies {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-allies__card {
  position: relative;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(11, 59, 60, .85), rgba(6, 8, 18, .95));
  transition: transform .22s ease, border-color .22s ease;
}

.page-about .about-allies__card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-allies__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-allies__name {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-allies__text {
  font-size: .9rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-honor {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 20px;
  border: 1px solid rgba(255, 122, 26, .35);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(58, 16, 36, .9), rgba(6, 8, 18, .92));
}

.page-about .about-honor__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font-size: 1.2rem;
  color: var(--orange);
  background: rgba(255, 122, 26, .12);
  border: 1px solid rgba(255, 122, 26, .4);
}

.page-about .about-honor__title {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-honor__text {
  font-size: .92rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  max-width: var(--about-maxw);
  margin: clamp(40px, 6vw, 78px) auto 0;
  padding-inline: var(--pad-x);
}

.page-about .about-cta__box {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 77, 255, .42);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(124, 77, 255, .32), transparent 58%),
    radial-gradient(90% 130% at 0% 100%, rgba(34, 211, 238, .16), transparent 62%),
    var(--ink-800);
  padding: clamp(26px, 4.5vw, 54px);
  display: grid;
  gap: 22px;
  align-items: center;
}

.page-about .about-cta__box::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(199, 210, 224, .06) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-about .about-cta__text {
  position: relative;
}

.page-about .about-cta__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about .about-cta__lead {
  font-size: .98rem;
  line-height: 1.78;
  color: var(--muted);
  margin: 0;
  max-width: 52ch;
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }

  .page-about .about-chapter {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 46px);
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: calc(var(--bar-h) + 26px);
    align-self: start;
  }

  .page-about .about-cover {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__plate-row {
    font-size: 11px;
  }

  .page-about .about-honor {
    flex-direction: column;
  }

  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pillar,
  .page-about .about-team__card,
  .page-about .about-allies__card,
  .page-about .about-tl__item {
    transition: none;
  }

  .page-about .about-pillar:hover,
  .page-about .about-team__card:hover,
  .page-about .about-allies__card:hover,
  .page-about .about-tl__item:hover {
    transform: none;
  }
}