.page-about {
  --ab-pad-left: clamp(30px, 5vw, 56px);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: 26px;
}
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--muted);
}
.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(143, 166, 160, .45);
}
.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}
.page-about .crumbs [aria-current] {
  color: var(--paper);
}

/* ---------- 通用排版 ---------- */
.page-about h2 {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.4vw, 2.85rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: .34em 0 0;
  color: var(--paper);
}
.page-about h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.1vw, 1.32rem);
  line-height: 1.55;
  margin: 0 0 .45em;
  color: var(--paper);
}
.page-about p {
  line-height: 1.85;
}
.page-about .ab-lede {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: clamp(.95rem, 1.6vw, 1.05rem);
  color: var(--muted);
}
.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  letter-spacing: -.025em;
  color: var(--gold);
}
.page-about .stat__label {
  display: block;
  margin-top: 5px;
  font-size: .75rem;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 图片基座 ---------- */
.page-about .ab-fig {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(16, 28, 58, .92), rgba(11, 43, 39, .92));
}
.page-about .ab-fig img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(1.04) contrast(1.02);
}
.page-about .ab-fig--16x9 { aspect-ratio: 16 / 9; }
.page-about .ab-fig--3x2 { aspect-ratio: 3 / 2; }
.page-about .ab-fig--4x3 { aspect-ratio: 4 / 3; }

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(26px, 5vw, 64px) 0 clamp(44px, 8vw, 96px);
  background:
    radial-gradient(120% 84% at 84% 6%, rgba(43, 232, 198, .14), transparent 62%),
    radial-gradient(90% 70% at 4% 96%, rgba(255, 77, 125, .10), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
}
.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}
.page-about .ab-hero__copy h1 {
  margin: .34em 0 .5em;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2.25rem, 7.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -.028em;
  color: var(--paper);
}
.page-about .ab-hero__copy h1 em {
  display: block;
  font-style: normal;
  color: var(--cyan);
}
.page-about .ab-hero__lede {
  margin: 0;
  max-width: 36em;
  font-size: clamp(.98rem, 1.7vw, 1.1rem);
  line-height: 1.9;
  color: rgba(234, 246, 244, .82);
}
.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 20px clamp(24px, 4vw, 44px);
  margin: 30px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .ab-hero__facts li {
  min-width: 104px;
}
.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(202deg, rgba(6, 18, 37, 0) 42%, rgba(6, 18, 37, .74) 100%);
}

/* ---------- 主张拆解 ---------- */
.page-about .ab-rhythm {
  padding: clamp(48px, 8vw, 100px) 0;
  background: linear-gradient(180deg, var(--ink-deep) 0%, var(--turf-deep) 100%);
}
.page-about .ab-rhythm__list {
  display: grid;
  gap: 0;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-rhythm__item {
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.page-about .ab-rhythm__item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .ab-rhythm__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .12em;
  color: var(--cyan);
}
.page-about .ab-rhythm__item p {
  margin: 0;
  max-width: 40em;
  font-size: .95rem;
  color: var(--muted);
}
.page-about .ab-rhythm__item a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}
.page-about .ab-rhythm__item a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 年份轴 ---------- */
.page-about .ab-timeline {
  padding: clamp(50px, 8vw, 104px) 0;
  background: linear-gradient(180deg, var(--turf-deep) 0%, var(--ink) 100%);
}
.page-about .ab-axis {
  position: relative;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0 0 0 var(--ab-pad-left);
  list-style: none;
}
.page-about .ab-axis::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(180deg, rgba(43, 232, 198, .9) 0%, rgba(43, 232, 198, .3) 48%, rgba(43, 232, 198, 0) 100%);
}
.page-about .ab-axis__item {
  position: relative;
  padding: 0 0 clamp(34px, 5vw, 54px);
}
.page-about .ab-axis__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--ab-pad-left));
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 232, 198, .10);
}
.page-about .ab-axis__item:last-child::before {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 194, 75, .14);
}
.page-about .ab-axis__year {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}
.page-about .ab-axis__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 5.6vw, 3.1rem);
  line-height: 1;
  letter-spacing: -.045em;
  color: var(--cyan);
}
.page-about .ab-axis__item:last-child .ab-axis__num {
  color: var(--gold);
}
.page-about .ab-axis__stage {
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .08em;
  color: var(--muted);
}
.page-about .ab-axis__body p {
  margin: 0;
  max-width: 40em;
  font-size: .95rem;
  color: var(--muted);
}
.page-about .ab-axis__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}
.page-about .ab-axis__body a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 引文带 ---------- */
.page-about .ab-quote {
  padding: clamp(44px, 7vw, 88px) 0;
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(20, 133, 95, .18), transparent 60%),
    var(--ink);
}
.page-about .ab-quote__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}
.page-about .ab-quote__text {
  margin: 0;
  padding: clamp(20px, 3vw, 32px);
  font-family: var(--font-serif);
  font-size: clamp(1.12rem, 2.5vw, 1.55rem);
  line-height: 1.9;
  color: var(--paper);
  background: rgba(16, 28, 58, .42);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.page-about .ab-quote__text p {
  margin: 0;
}
.page-about .ab-quote__text cite {
  display: block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-style: normal;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding: clamp(48px, 8vw, 100px) 0;
  background: linear-gradient(180deg, var(--ink) 0%, var(--turf-deep) 100%);
}
.page-about .ab-team__rows {
  margin-top: clamp(26px, 4vw, 44px);
}
.page-about .ab-team__row {
  display: grid;
  gap: 8px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.page-about .ab-team__row:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .ab-team__name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .07em;
  color: var(--cyan);
}
.page-about .ab-team__role {
  margin: 0;
  font-size: .95rem;
  color: var(--paper);
}
.page-about .ab-team__detail {
  margin: 0;
  font-size: .93rem;
  color: var(--muted);
}

/* ---------- 制作标准 ---------- */
.page-about .ab-standard {
  padding: clamp(48px, 8vw, 100px) 0;
  background: linear-gradient(180deg, var(--turf-deep) 0%, var(--ink) 100%);
}
.page-about .ab-standard__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}
.page-about .ab-standard__list {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
}
.page-about .ab-standard__list > div {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.page-about .ab-standard__list > div:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .ab-standard__list dt {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--gold);
}
.page-about .ab-standard__list dd {
  margin: 0;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 素材网络 ---------- */
.page-about .ab-network {
  padding: clamp(48px, 8vw, 100px) 0;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
}
.page-about .ab-flow {
  display: grid;
  gap: 14px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: ab-flow;
}
.page-about .ab-flow__step {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(16, 28, 58, .42);
}
.page-about .ab-flow__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--cyan);
}
.page-about .ab-flow__step h3 {
  font-size: 1.02rem;
  margin-bottom: .35em;
}
.page-about .ab-flow__step p {
  margin: 0;
  font-size: .9rem;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .ab-partners {
  padding: clamp(48px, 8vw, 100px) 0 clamp(56px, 9vw, 116px);
  background: linear-gradient(180deg, var(--ink-deep) 0%, var(--turf-deep) 100%);
}
.page-about .ab-partners__grid {
  display: grid;
  gap: 18px;
  margin: clamp(28px, 4vw, 46px) 0 0;
}
.page-about .ab-partners__card {
  padding: 24px 22px;
  border-left: 2px solid var(--line-cyan);
  background: rgba(16, 28, 58, .34);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.page-about .ab-partners__card h3 {
  font-size: 1.06rem;
  margin-bottom: .5em;
}
.page-about .ab-partners__card p {
  margin: 0;
  font-size: .92rem;
  color: var(--muted);
}
.page-about .ab-partners__cta {
  display: grid;
  gap: 18px;
  align-items: center;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.page-about .ab-partners__cta p {
  margin: 0;
  max-width: 34em;
  font-size: .96rem;
  color: var(--paper);
}
.page-about .ab-partners__cta .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .ab-flow__step {
    border-radius: 0;
    border-right-width: 0;
  }
  .page-about .ab-flow__step:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
  }
  .page-about .ab-flow__step:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
    border-right-width: 1px;
  }
}

@media (min-width: 820px) {
  .page-about .ab-team__row {
    grid-template-columns: 132px minmax(0, .95fr) minmax(0, 1.2fr);
    gap: 0 clamp(20px, 3vw, 40px);
    align-items: start;
  }
  .page-about .ab-standard__list > div {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
  .page-about .ab-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-partners__cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
  .page-about .ab-quote__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }
  .page-about .ab-standard__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
  .page-about .ab-axis__item {
    display: grid;
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 0 clamp(20px, 3vw, 38px);
    align-items: start;
  }
  .page-about .ab-axis__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 0;
  }
  .page-about .ab-rhythm__item {
    padding-left: 72px;
  }
  .page-about .ab-rhythm__item:nth-child(2) {
    padding-left: 128px;
  }
  .page-about .ab-rhythm__item:nth-child(3) {
    padding-left: 184px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-quote__text {
    font-size: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crumbs a,
  .page-about .ab-rhythm__item a,
  .page-about .ab-axis__body a {
    transition: none;
  }
}