.page-about {
  --about-rail: 116px;
  --about-card-bg: linear-gradient(158deg, rgba(15, 53, 84, 0.72), rgba(10, 34, 56, 0.44) 58%, rgba(6, 21, 35, 0.28));
  position: relative;
  color: var(--cream);
  background:
    radial-gradient(1100px 520px at 84% -8%, rgba(21, 91, 122, 0.44), transparent 66%),
    radial-gradient(720px 420px at -6% 42%, rgba(255, 107, 74, 0.09), transparent 70%),
    var(--ink-950);
}

.page-about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 780px;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--hairline-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hairline-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  z-index: 0;
}

.page-about > * {
  position: relative;
  z-index: 1;
}

.page-about .section {
  padding-block: clamp(44px, 6.5vw, 84px);
}

.page-about .about-crumb {
  padding-top: 22px;
}

.page-about .section__head {
  max-width: 62ch;
  margin-bottom: 28px;
}

.page-about .section__head h2 {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--cream);
}

.page-about .section__head p {
  margin: 12px 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 clamp(40px, 6vw, 72px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .about-hero__text h1 {
  font-family: var(--font-title);
  font-size: clamp(2.05rem, 6.4vw, 4.05rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin: 14px 0 0;
  color: var(--cream);
  max-width: 16ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.page-about .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  line-height: 1;
  color: var(--mint);
  letter-spacing: -0.02em;
}

.page-about .hero-fact__label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 10px;
  background: var(--about-card-bg);
  box-shadow: 0 24px 60px -38px rgba(0, 0, 0, 0.9);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 2px;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(6, 21, 35, 0) 0 3px,
    rgba(6, 21, 35, 0.28) 3px 4px
  );
  opacity: 0.55;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 2px;
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  display: block;
  margin-top: 10px;
  padding-left: 2px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 品牌历程 ---------- */
.page-about .about-history__layout {
  display: grid;
  gap: 22px;
}

.page-about .about-yearnav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.page-about .about-yearnav::-webkit-scrollbar {
  display: none;
}

.page-about .about-yearnav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-yearnav a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: currentColor;
  opacity: 0.7;
}

.page-about .about-yearnav a:hover,
.page-about .about-yearnav a:focus-visible {
  color: var(--ink-950);
  background: var(--mint);
  border-color: var(--mint);
}

.page-about .about-years {
  display: grid;
  gap: 18px;
}

.page-about .about-year {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--about-card-bg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  scroll-margin-top: calc(var(--bar-h) + 26px);
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 58px;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), transparent);
}

.page-about .about-year__year {
  margin: 0;
  font-size: 1.4rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-year__title {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-year p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

.page-about .about-history__figure {
  margin: 30px 0 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(10, 34, 56, 0.45);
}

.page-about .about-history__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-history__figure figcaption {
  padding: 12px 16px;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  border-top: 1px solid var(--hairline-soft);
}

/* ---------- 发布流程 ---------- */
.page-about .about-gates {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-gate {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-gate__num {
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--coral-soft);
}

.page-about .about-gate__body {
  min-width: 0;
}

.page-about .about-gate__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-gate__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .about-team__body h2 {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--cream);
}

.page-about .about-team__lead {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .about-bars {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

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

.page-about .about-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
}

.page-about .about-bar__name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-bar__num {
  font-size: 0.84rem;
  color: var(--mint);
  opacity: 0.6;
  transition: opacity 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-bar__track {
  display: block;
  height: 8px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  background: rgba(6, 21, 35, 0.65);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--line-700), var(--mint));
  transition: filter 0.18s var(--ease);
}

.page-about .about-bar:nth-child(1) .about-bar__fill { width: 37.5%; }
.page-about .about-bar:nth-child(2) .about-bar__fill { width: 25%; }
.page-about .about-bar:nth-child(3) .about-bar__fill { width: 18.75%; }
.page-about .about-bar:nth-child(4) .about-bar__fill { width: 18.75%; }

.page-about .about-bar__note {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-bar:hover .about-bar__num,
.page-about .about-bar:focus-within .about-bar__num {
  opacity: 1;
  color: var(--coral-soft);
}

.page-about .about-bar:hover .about-bar__fill,
.page-about .about-bar:focus-within .about-bar__fill {
  filter: brightness(1.4);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 10px;
  background: var(--about-card-bg);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 2px;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  display: block;
  margin-top: 10px;
  padding-left: 2px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 运营节奏 ---------- */
.page-about .about-rhythm__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-beat {
  padding: 20px 20px 22px;
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--line-700);
  border-radius: var(--radius);
  background: rgba(10, 34, 56, 0.5);
  transition: border-left-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-beat:hover {
  border-left-color: var(--mint);
  background: rgba(15, 53, 84, 0.6);
}

.page-about .about-beat__when {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid rgba(255, 200, 87, 0.42);
  border-radius: 2px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-beat__title {
  margin: 12px 0 8px;
  font-family: var(--font-title);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-beat p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--cream-dim);
}

/* ---------- 合作生态 / 数据舱窗 ---------- */
.page-about .about-metrics__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-metrics__chips a {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-metrics__chips a:hover,
.page-about .about-metrics__chips a:focus-visible {
  color: var(--ink-950);
  background: var(--coral-soft);
  border-color: var(--coral-soft);
}

.page-about .about-metrics__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-metric {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    radial-gradient(280px 140px at 100% 0%, rgba(59, 240, 200, 0.12), transparent 70%),
    linear-gradient(165deg, rgba(15, 53, 84, 0.78), rgba(6, 21, 35, 0.5));
  box-shadow: 0 22px 50px -40px rgba(0, 0, 0, 0.95);
  scroll-margin-top: calc(var(--bar-h) + 26px);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-metric::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), transparent);
}

.page-about .about-metric:target {
  border-color: rgba(59, 240, 200, 0.6);
  box-shadow: 0 0 0 1px rgba(59, 240, 200, 0.32), 0 26px 60px -42px rgba(59, 240, 200, 0.7);
}

.page-about .about-metric__label {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-metric__num {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-size: clamp(1.7rem, 4.6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-about .about-metric__num small {
  display: inline-block;
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--coral-soft);
}

.page-about .about-metric__desc {
  margin: 14px 0 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--cream-dim);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding: 28px 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    radial-gradient(520px 220px at 12% 0%, rgba(255, 107, 74, 0.14), transparent 68%),
    linear-gradient(150deg, rgba(15, 53, 84, 0.7), rgba(6, 21, 35, 0.6));
}

.page-about .about-cta__text h2 {
  font-family: var(--font-title);
  font-size: clamp(1.38rem, 3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--cream);
}

.page-about .about-cta__text p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-metrics__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-rhythm__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-beat:nth-child(even) {
    margin-top: 28px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.78fr);
    gap: 52px;
  }

  .page-about .about-hero__figure {
    margin-top: 12px;
  }

  .page-about .about-history__layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-yearnav {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0;
  }

  .page-about .about-yearnav a {
    border: 0;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 9px 0 9px 16px;
    background: none;
  }

  .page-about .about-yearnav a:hover,
  .page-about .about-yearnav a:focus-visible {
    background: none;
    color: var(--coral);
    border-left-color: var(--coral);
  }

  .page-about .about-year:nth-child(odd) {
    margin-right: 56px;
  }

  .page-about .about-year:nth-child(even) {
    margin-left: 44px;
  }

  .page-about .about-gate {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 26px;
    padding: 26px 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 36px 32px;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-history__layout {
    gap: 56px;
  }

  .page-about .about-year {
    padding: 26px 26px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-yearnav a,
  .page-about .about-bar__num,
  .page-about .about-bar__fill,
  .page-about .about-beat,
  .page-about .about-metric,
  .page-about .about-metrics__chips a {
    transition: none;
  }
}