.page-about {
  --ab-rail: clamp(64px, 8vw, 116px);
  --ab-hard: 7px 7px 0 var(--fox);
  --ab-hard-alt: 6px 6px 0 var(--clay);
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(3rem, 7vw, 6rem);
  background:
    radial-gradient(120% 90% at 92% -12%, rgba(255, 90, 31, 0.45) 0%, rgba(255, 90, 31, 0) 58%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -30%;
  width: 128%;
  height: 44%;
  background: linear-gradient(92deg, var(--clay) 0%, var(--fox) 46%, var(--lava) 100%);
  transform: rotate(-3.5deg);
  opacity: 0.34;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-hero__crumbs {
  grid-column: 1 / -1;
}

.page-about .about-hero__crumbs .crumbs {
  margin: 0;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--lava);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 26px;
  height: 3px;
  background: var(--fox);
  flex: none;
}

.page-about .about-hero__h1 {
  margin: 0 0 1.125rem;
  font-size: clamp(2.05rem, 5.6vw, 4.25rem);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.03em;
  transform: skewY(-2deg);
  transform-origin: left center;
}

.page-about .about-hero__h1 em {
  font-style: normal;
  color: var(--fox);
}

.page-about .about-hero__lede {
  margin: 0 0 1.75rem;
  max-width: 46ch;
  font-size: clamp(0.9875rem, 1.2vw, 1.0625rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.page-about .about-hero__fig {
  margin: 0;
  position: relative;
  border: 3px solid var(--edge);
  background: var(--rock);
  box-shadow: var(--hard);
  transform: rotate(-1.2deg);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(1.08) contrast(1.06);
}

.page-about .about-hero__cap {
  display: block;
  padding: 0.6rem 0.9rem;
  border-top: 3px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--moss);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6.5fr) minmax(0, 5.5fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }
  .page-about .about-hero__text {
    grid-column: 1;
  }
  .page-about .about-hero__fig {
    grid-column: 2;
    transform: rotate(-1.6deg) translateY(-0.75rem);
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(3rem, 8vw, 7rem) 0;
}

.page-about .about-sec--light {
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-sec--dark {
  background: var(--ink);
  color: var(--cream);
}

.page-about .about-sec--light::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--fox) 0%, var(--clay) 52%, var(--volt) 100%);
}

.page-about .about-sec__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .about-sec__rail {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 1rem;
}

.page-about .about-sec__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 0.88;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--fox);
  transform: skewY(-7deg);
}

.page-about .about-sec__rot {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--moss);
  white-space: nowrap;
}

.page-about .about-sec--light .about-sec__rot {
  color: var(--clay);
}

.page-about .about-sec--dark .about-sec__rot {
  color: var(--moss);
}

.page-about .about-sec__h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.4vw, 2.75rem);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.025em;
}

.page-about .about-sec__lede {
  margin: 0 0 clamp(1.5rem, 4vw, 2.75rem);
  max-width: 62ch;
  font-size: clamp(0.9875rem, 1.15vw, 1.0625rem);
  line-height: 1.85;
}

.page-about .about-sec--light .about-sec__lede {
  color: var(--edge);
}

.page-about .about-sec--dark .about-sec__lede {
  color: var(--mist);
}

@media (min-width: 880px) {
  .page-about .about-sec__grid {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
  }
  .page-about .about-sec__rail {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .page-about .about-sec__rot {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
    white-space: normal;
  }
}

/* ---------- 团队展开卡片 ---------- */
.page-about .about-team-fig {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  border: 3px solid var(--ink);
  box-shadow: var(--ab-hard);
  background: #fff;
}

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

.page-about .tm-list {
  display: grid;
  gap: 1.125rem;
}

.page-about .tm {
  border: 3px solid var(--ink);
  background: #ffffff;
  box-shadow: var(--ab-hard-alt);
}

.page-about .tm__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.875rem;
  padding: 1.0625rem 1.25rem;
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
}

.page-about .tm__head::-webkit-details-marker {
  display: none;
}

.page-about .tm[open] > .tm__head {
  background: var(--ink);
  color: var(--cream);
}

.page-about .tm__no {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--fox);
  flex: none;
}

.page-about .tm__name {
  flex: 1 1 auto;
  font-size: clamp(1.0625rem, 1.6vw, 1.3125rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .tm__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border: 2px solid currentColor;
  color: var(--clay);
  flex: none;
}

.page-about .tm[open] .tm__meta {
  color: var(--flux);
}

.page-about .tm__chev {
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  border: 2px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1;
  flex: none;
}

.page-about .tm__chev::before {
  content: "+";
}

.page-about .tm[open] .tm__chev::before {
  content: "−";
}

.page-about .tm__body {
  padding: 1.125rem 1.25rem 1.375rem;
  border-top: 3px solid var(--ink);
  display: grid;
  gap: 0.875rem;
}

.page-about .tm__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--edge);
}

.page-about .tm__body a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .tm__body a:hover,
.page-about .tm__body a:focus-visible {
  color: var(--fox);
}

.page-about .tm__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-about .tm__list li {
  display: flex;
  gap: 0.625rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--ink);
}

.page-about .tm__list li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 0.5rem;
  background: var(--fox);
  transform: rotate(45deg);
}

/* ---------- 流程折线 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .flow__step {
  position: relative;
  border: 3px solid var(--edge);
  background: var(--rock);
  padding: 1.25rem 1.125rem 1.375rem;
}

.page-about .flow__step::after {
  content: "";
  position: absolute;
  top: -9px;
  left: -9px;
  width: 14px;
  height: 14px;
  background: var(--clay);
  transform: rotate(45deg);
}

.page-about .flow__no {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--fox);
  transform: skewY(-6deg);
}

.page-about .flow__t {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.32;
  color: var(--cream);
}

.page-about .flow__d {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 960px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.125rem;
  }
  .page-about .flow__step:nth-child(even) {
    transform: translateY(2.5rem);
  }
}

/* ---------- 成长阶段横向时间轴 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 1rem;
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}

.page-about .tl__item {
  flex: 0 0 min(78vw, 310px);
  scroll-snap-align: start;
  background: #ffffff;
  border: 3px solid var(--ink);
  border-top: 6px solid var(--fox);
  padding: 1.25rem 1.125rem 1.5rem;
}

.page-about .tl__no {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--clay);
}

.page-about .tl__t {
  margin: 0 0 0.625rem;
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.32;
  color: var(--ink);
}

.page-about .tl__d {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--edge);
}

/* ---------- 规模数据 ---------- */
.page-about .stat-list {
  list-style: none;
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.page-about .stat {
  border-left: 4px solid var(--fox);
  padding: 0.25rem 0 0.25rem 1rem;
}

.page-about .stat__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.125rem, 4.4vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--fox);
}

.page-about .stat__u {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .stat__d {
  margin: 0.375rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

.page-about .about-data-fig {
  margin: 0 0 clamp(1.25rem, 3vw, 1.75rem);
  border: 3px solid var(--edge);
  background: var(--rock);
  box-shadow: var(--hard);
}

.page-about .about-data-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-scale__note {
  margin: 0;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 640px) {
  .page-about .stat-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

/* ---------- 合作生态 ---------- */
.page-about .eco {
  display: grid;
  gap: 1.25rem;
}

.page-about .eco__card {
  background: #ffffff;
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--clay);
  padding: 1.5rem 1.375rem 1.625rem;
}

.page-about .eco__n {
  display: inline-block;
  margin-bottom: 0.875rem;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3.5vw, 2.625rem);
  font-weight: 700;
  line-height: 1;
  color: var(--fox);
}

.page-about .eco__t {
  margin: 0 0 0.625rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .eco__d {
  margin: 0;
  max-width: 48ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--edge);
}

@media (min-width: 720px) {
  .page-about .eco {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 尾部行动条 ---------- */
.page-about .about-cta {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  background: var(--ink);
  color: var(--cream);
  border: 3px solid var(--ink);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  gap: 1.25rem;
  align-items: center;
}

.page-about .about-cta__t {
  margin: 0 0 0.5rem;
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .about-cta__d {
  margin: 0;
  max-width: 52ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__fig,
  .page-about .about-sec__no,
  .page-about .flow__no,
  .page-about .about-hero__h1 {
    transform: none;
  }
  .page-about .tl {
    scroll-behavior: auto;
  }
}