.page-about {
  background: var(--mist);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  padding: calc(var(--header-h) + 30px) 0 clamp(58px, 8vw, 104px);
  background:
    radial-gradient(110% 82% at 84% -12%, rgba(47, 167, 154, .34), transparent 62%),
    radial-gradient(92% 72% at -6% 104%, rgba(35, 48, 107, .58), transparent 62%),
    linear-gradient(168deg, #0B1B26 0%, #0c2130 56%, #0B1B26 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-hero__copy {
  max-width: 36rem;
}

.page-about .ab-hero h1 {
  margin: .4em 0 .45em;
  font-size: clamp(2.05rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 31em;
  font-size: clamp(.98rem, 1.3vw, 1.06rem);
  line-height: 1.85;
  color: rgba(255, 255, 255, .82);
}

.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 13px;
  border-left: 2px solid rgba(242, 166, 59, .7);
}

.page-about .ab-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3vw, 1.95rem);
  font-weight: 600;
  line-height: 1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.page-about .ab-hero__facts em {
  font-style: normal;
  font-size: .78rem;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .7);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-hero__media {
  position: relative;
  margin: 0;
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--r-l);
}

.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-l);
  pointer-events: none;
  background:
    linear-gradient(160deg, rgba(228, 80, 42, .26), transparent 48%),
    linear-gradient(0deg, rgba(11, 27, 38, .62), transparent 56%);
}

.page-about .ab-hero__media figcaption {
  position: absolute;
  z-index: 2;
  left: 18px;
  right: 18px;
  bottom: 14px;
  font-size: .78rem;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .82);
}

.page-about .ab-hero__vnote {
  display: none;
}

/* ---------- 起源 ---------- */
.page-about .ab-origin {
  padding-block: clamp(44px, 7vw, 100px);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
}

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

.page-about .ab-origin__vnote {
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--teal);
}

.page-about .ab-origin__idx {
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .1em;
  color: var(--orange);
  padding: 4px 10px;
  border: 1px solid rgba(228, 80, 42, .35);
  border-radius: 999px;
}

.page-about .ab-origin__body h2 {
  margin: .25em 0 .55em;
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-origin__body p {
  margin: 0 0 1.15em;
  max-width: 32em;
  font-size: clamp(.98rem, 1.1vw, 1.05rem);
  line-height: 1.85;
  color: #23343f;
}

.page-about .ab-origin__lead {
  font-size: clamp(1.06rem, 1.5vw, 1.2rem) !important;
  font-weight: 600;
  color: var(--ink) !important;
}

.page-about .ab-quote {
  margin: clamp(24px, 4vw, 38px) 0;
  padding: clamp(12px, 2.2vw, 20px);
  border: 0;
  border-radius: var(--r-l);
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-soft) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%);
}

.page-about .ab-quote__glass {
  padding: clamp(18px, 3vw, 28px);
  border-radius: var(--r-m);
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .24);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #fff;
}

.page-about .ab-quote__glass p {
  margin: 0 0 10px;
  max-width: 26em;
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 700;
  line-height: 1.5;
  color: #fff;
}

.page-about .ab-quote__glass cite {
  font-style: normal;
  font-size: .82rem;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .82);
}

/* ---------- 生产流程 ---------- */
.page-about .ab-flow {
  position: relative;
  padding-block: clamp(46px, 7vw, 100px);
  color: #fff;
  background: linear-gradient(158deg, var(--indigo) 0%, #182350 52%, var(--ink) 100%);
  clip-path: polygon(0 26px, 100% 0, 100% 100%, 0 100%);
}

.page-about .ab-flow__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
}

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

.page-about .ab-flow__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-m);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .ab-flow .eyebrow {
  color: var(--amber);
}

.page-about .ab-flow h2 {
  margin: .25em 0 .5em;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.02em;
  color: #fff;
}

.page-about .ab-flow__lead {
  margin: 0;
  max-width: 32em;
  font-size: clamp(.96rem, 1.1vw, 1.03rem);
  line-height: 1.85;
  color: rgba(255, 255, 255, .8);
}

.page-about .ab-steps {
  display: grid;
  gap: 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 6px 14px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.page-about .ab-steps .mono {
  font-family: var(--font-mono);
  font-size: .9rem;
  letter-spacing: .1em;
  color: var(--amber);
  padding-top: 3px;
}

.page-about .ab-steps h3 {
  grid-column: 2;
  margin: 0;
  font-size: 1.04rem;
  font-weight: 700;
  color: #fff;
}

.page-about .ab-steps p {
  grid-column: 2;
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, .76);
}

.page-about .ab-flow__tail {
  margin: 24px 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, .82);
}

.page-about .ab-flow__tail a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 166, 59, .5);
  padding-bottom: 1px;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  padding-block: clamp(46px, 7vw, 104px);
  background: linear-gradient(180deg, var(--mist) 0%, #eef5f3 100%);
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, rgba(14, 110, 99, .075) 0 1px, transparent 1px 92px);
}

.page-about .ab-timeline .shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px 28px;
}

.page-about .ab-timeline h2 {
  margin: .25em 0 0;
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-seg {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-seg a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--teal);
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .ab-seg a:hover,
.page-about .ab-seg a:focus-visible {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.page-about .ab-track {
  position: relative;
  display: grid;
  gap: 16px;
  margin: clamp(26px, 4.5vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stage {
  position: relative;
  padding: 20px 20px 22px;
  background: #fff;
  border-radius: var(--r-m);
  box-shadow: var(--shadow-1);
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--teal-soft), var(--orange));
}

.page-about .ab-stage:nth-child(even)::before {
  background: linear-gradient(180deg, var(--amber), var(--orange));
}

.page-about .ab-stage__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .ab-stage__title {
  margin: 0 0 8px;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-stage__text {
  margin: 0 0 12px;
  font-size: .92rem;
  line-height: 1.78;
  color: #2c3d48;
}

.page-about .ab-stage__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--teal);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding-block: clamp(46px, 7vw, 104px);
  background: var(--mist);
}

.page-about .ab-team__head {
  max-width: 44rem;
}

.page-about .ab-team h2 {
  margin: .25em 0 .5em;
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-team__lead {
  margin: 0;
  max-width: 32em;
  font-size: clamp(.96rem, 1.1vw, 1.03rem);
  line-height: 1.85;
  color: #34454f;
}

.page-about .ab-team__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .ab-role {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 24px;
  border-radius: var(--r-l);
  color: #fff;
  min-height: 200px;
}

.page-about .ab-role--edit {
  background: linear-gradient(160deg, var(--teal) 0%, #0a5a51 100%);
}

.page-about .ab-role--data {
  background: linear-gradient(160deg, var(--indigo) 0%, #17224d 100%);
}

.page-about .ab-role--tech {
  background: linear-gradient(160deg, var(--wine) 0%, #3f1420 100%);
}

.page-about .ab-role--cs {
  background: linear-gradient(160deg, var(--orange) 0%, #b93c1c 100%);
}

.page-about .ab-role__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.page-about .ab-role--cs .ab-role__num {
  color: #fff;
}

.page-about .ab-role__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .ab-role__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, .84);
}

.page-about .ab-team__note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--teal-soft);
  max-width: 40em;
  font-size: .93rem;
  line-height: 1.8;
  color: #34454f;
}

/* ---------- 生态 ---------- */
.page-about .ab-eco {
  padding-block: clamp(48px, 7vw, 104px);
  color: #fff;
  background: linear-gradient(155deg, var(--ink) 0%, #1b1c33 48%, #35182a 100%);
}

.page-about .ab-eco .eyebrow {
  color: var(--amber);
}

.page-about .ab-eco h2 {
  margin: .25em 0 .5em;
  max-width: 20em;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: #fff;
}

.page-about .ab-eco__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(.96rem, 1.1vw, 1.04rem);
  line-height: 1.85;
  color: rgba(255, 255, 255, .8);
}

.page-about .ab-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  border-radius: var(--r-m);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .14);
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.15rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--teal-soft);
}

.page-about .ab-stat:nth-child(2n) .ab-stat__num {
  color: var(--amber);
}

.page-about .ab-stat__label {
  font-size: .82rem;
  line-height: 1.6;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .74);
}

.page-about .ab-eco__media {
  position: relative;
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-about .ab-eco__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--r-m);
}

.page-about .ab-eco__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-m);
  pointer-events: none;
  background: linear-gradient(200deg, rgba(92, 31, 51, .45), transparent 58%);
}

.page-about .ab-eco__media figcaption {
  position: absolute;
  z-index: 2;
  left: 16px;
  bottom: 12px;
  right: 16px;
  font-size: .76rem;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .8);
}

.page-about .ab-eco__tail {
  margin: 22px 0 0;
  max-width: 40em;
  font-size: .93rem;
  line-height: 1.82;
  color: rgba(255, 255, 255, .82);
}

.page-about .ab-eco__tail a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 166, 59, .5);
}

/* ---------- 三条理由与收尾 ---------- */
.page-about .ab-why {
  padding-block: clamp(46px, 7vw, 104px);
  background: var(--mist);
}

.page-about .ab-why h2 {
  margin: .25em 0 0;
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-why__grid {
  display: grid;
  gap: 22px;
  margin-top: clamp(24px, 4vw, 42px);
}

.page-about .ab-why__item {
  padding-top: 18px;
  border-top: 2px solid var(--line);
}

.page-about .ab-why__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .ab-why__item h3 {
  margin: 0 0 10px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-why__item p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.82;
  color: #33444f;
}

.page-about .ab-cta {
  margin-top: clamp(30px, 5vw, 56px);
  padding: clamp(26px, 4.5vw, 48px) clamp(20px, 4vw, 44px);
  border-radius: var(--r-l);
  color: #fff;
  background:
    radial-gradient(90% 120% at 90% 0%, rgba(47, 167, 154, .55), transparent 62%),
    linear-gradient(140deg, var(--teal) 0%, #0a5a51 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 12px;
  max-width: 22em;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: #fff;
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 34em;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, .85);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-cta__actions .btn--ghost {
  border-color: rgba(255, 255, 255, .6);
  color: #fff;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-why__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

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

  .page-about .ab-eco__media img {
    aspect-ratio: 21 / 9;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-about .ab-hero__media img {
    aspect-ratio: 4 / 5;
  }

  .page-about .ab-flow__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .ab-flow__media {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }
}

@media (min-width: 960px) {
  .page-about .ab-origin__grid {
    grid-template-columns: 3fr 9fr;
  }

  .page-about .ab-origin__aside {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .page-about .ab-origin__vnote {
    writing-mode: vertical-rl;
    letter-spacing: .34em;
  }
}

@media (min-width: 980px) {
  .page-about .ab-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: 1fr 56px 1fr;
    column-gap: 20px;
    row-gap: 0;
    padding-block: 8px;
  }

  .page-about .ab-track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 4px;
    transform: translateY(-50%);
    border-radius: 2px;
    background: linear-gradient(90deg, var(--teal) 0%, var(--teal-soft) 36%, var(--orange) 72%, var(--amber) 100%);
  }

  .page-about .ab-stage:nth-child(1) { grid-area: 1 / 1; align-self: end; }
  .page-about .ab-stage:nth-child(2) { grid-area: 3 / 2; align-self: start; }
  .page-about .ab-stage:nth-child(3) { grid-area: 1 / 3; align-self: end; }
  .page-about .ab-stage:nth-child(4) { grid-area: 3 / 4; align-self: start; }

  .page-about .ab-stage::after {
    content: "";
    position: absolute;
    left: 26px;
    width: 2px;
    height: 28px;
    background: rgba(14, 110, 99, .4);
  }

  .page-about .ab-stage:nth-child(odd)::after { bottom: -28px; }
  .page-about .ab-stage:nth-child(even)::after { top: -28px; }
}

@media (min-width: 1080px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-role {
    min-height: 230px;
  }
}

@media (min-width: 1160px) {
  .page-about .ab-hero__vnote {
    display: block;
    position: absolute;
    z-index: 2;
    right: clamp(10px, 2vw, 28px);
    top: calc(var(--header-h) + 96px);
    font-size: 11px;
    letter-spacing: .35em;
    writing-mode: vertical-rl;
    color: rgba(255, 255, 255, .45);
  }
}

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