.page-about {
  display: block;
  background: var(--hs-space);
  color: var(--hs-silver);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(40px, 6vw, 84px);
  border-bottom: 1px solid var(--hs-line);
  background:
    radial-gradient(120% 82% at 84% 0%, rgba(0, 229, 255, 0.14), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(255, 122, 26, 0.1), transparent 64%),
    var(--hs-space);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--hs-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hs-line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.32;
  pointer-events: none;
}

.page-about .ab-hero > .hs-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(24px, 4vw, 46px);
}

.page-about .ab-title {
  margin: 12px 0 0;
  font-family: var(--hs-font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 8.6vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--hs-white);
}

.page-about .ab-mark {
  position: relative;
  color: var(--hs-cyan);
}

.page-about .ab-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.08em;
  height: 3px;
  background: var(--hs-orange);
}

.page-about .ab-hero__lead .hs-lede {
  margin-top: clamp(14px, 2.4vw, 22px);
  max-width: 46ch;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 28px);
}

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

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--hs-line);
  background: var(--hs-panel);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 10% 100%);
}

.page-about .ab-hero__caption {
  margin-top: 12px;
  font-family: var(--hs-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--hs-mist);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 5vw, 52px);
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
}

.page-about .ab-stat {
  background: rgba(11, 23, 51, 0.78);
  padding: 16px 18px;
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.1;
  color: var(--hs-white);
}

.page-about .ab-stat__unit {
  font-size: 0.55em;
  color: var(--hs-orange);
  margin-left: 2px;
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--hs-mist);
}

/* ---------- 通用分栏 ---------- */
.page-about .ab-split {
  display: grid;
  gap: clamp(18px, 3.4vw, 40px);
}

.page-about .ab-split__head .hs-title {
  margin-top: 10px;
}

.page-about .ab-split__body .hs-text + .hs-text {
  margin-top: 14px;
}

.page-about .ab-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--hs-line);
  font-size: 0.86rem;
  color: var(--hs-mist);
}

.page-about .ab-note__dot {
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--hs-green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(61, 220, 151, 0.14);
}

/* ---------- 四个版本 ---------- */
.page-about .ab-versions__list {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border-top: 1px solid var(--hs-line);
  border-bottom: 1px solid var(--hs-line);
}

.page-about .ab-version {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: clamp(18px, 3vw, 28px) clamp(16px, 3vw, 30px);
  background: var(--hs-space);
  transition: background 0.25s var(--hs-ease);
}

.page-about .ab-version::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--hs-cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s var(--hs-ease);
}

.page-about .ab-version:hover {
  background: var(--hs-panel);
}

.page-about .ab-version:hover::before {
  transform: scaleY(1);
}

.page-about .ab-version__no {
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--hs-mist);
  transition: color 0.25s var(--hs-ease);
}

.page-about .ab-version:hover .ab-version__no {
  color: var(--hs-orange);
}

.page-about .ab-version__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .ab-version__top .hs-title {
  margin: 0;
}

.page-about .ab-version__main .hs-text {
  margin-top: 8px;
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: clamp(20px, 3.6vw, 40px);
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-about .ab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
}

.page-about .ab-role {
  display: grid;
  grid-template-columns: 68px 1fr;
  align-items: start;
  gap: 14px;
  padding: clamp(16px, 2.6vw, 22px) clamp(14px, 2.4vw, 22px);
  background: rgba(11, 23, 51, 0.7);
}

.page-about .ab-role__num {
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3.6vw, 2rem);
  line-height: 1;
  color: var(--hs-cyan);
}

.page-about .ab-role__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--hs-white);
}

.page-about .ab-role__body .hs-text {
  margin: 0;
  font-size: 0.92rem;
}

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

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--hs-line);
  background: var(--hs-panel);
}

/* ---------- 内容节奏 ---------- */
.page-about .ab-standards {
  border-top: 1px solid var(--hs-line);
  border-bottom: 1px solid var(--hs-line);
  background: linear-gradient(180deg, rgba(11, 23, 51, 0.55), rgba(5, 11, 26, 0));
}

.page-about .ab-standards__list {
  list-style: none;
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
}

.page-about .ab-standard {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--hs-space);
}

.page-about .ab-standard__time {
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  letter-spacing: 0.02em;
  color: var(--hs-orange);
}

.page-about .ab-standard__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--hs-silver);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-about .ab-partner {
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .ab-partner__num {
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  line-height: 1;
  color: var(--hs-cyan);
}

.page-about .ab-partner .hs-title {
  margin: 0;
  color: var(--hs-white);
}

.page-about .ab-partner .hs-text {
  margin: 0;
  font-size: 0.94rem;
}

.page-about .ab-partner--cta {
  background: linear-gradient(135deg, rgba(255, 122, 26, 0.14), rgba(11, 23, 51, 0.9) 62%);
  border-color: rgba(255, 122, 26, 0.35);
}

.page-about .ab-partner--cta .hs-btn {
  align-self: flex-start;
  margin-top: 6px;
}

/* ---------- 里程碑 ---------- */
.page-about .ab-mile__grid {
  display: grid;
  gap: clamp(20px, 3.6vw, 36px);
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-about .ab-mile__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-mile__item {
  position: relative;
  padding: 0 0 20px 24px;
  border-left: 1px solid var(--hs-line);
}

.page-about .ab-mile__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-mile__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--hs-orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, 0.14);
}

.page-about .ab-mile__year {
  display: block;
  font-family: var(--hs-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--hs-cyan);
}

.page-about .ab-mile__text {
  margin: 6px 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--hs-silver);
}

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

.page-about .ab-mile__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--hs-line);
  background: var(--hs-panel);
}

/* ---------- 收束 ---------- */
.page-about .ab-cta__panel {
  position: relative;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--hs-line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(0, 229, 255, 0.12), transparent 58%),
    var(--hs-panel);
}

.page-about .ab-cta__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 64px;
  height: 3px;
  background: var(--hs-cyan);
}

.page-about .ab-cta__panel .hs-title {
  margin-top: 10px;
}

.page-about .ab-cta__links {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 30px);
  background: var(--hs-line);
  border-top: 1px solid var(--hs-line);
}

.page-about .ab-cta__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 4px;
  background: transparent;
  color: var(--hs-silver);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--hs-line);
  transition: color 0.22s var(--hs-ease), padding-left 0.22s var(--hs-ease);
}

.page-about .ab-cta__link:hover,
.page-about .ab-cta__link:focus-visible {
  color: var(--hs-white);
  padding-left: 12px;
  outline: none;
}

.page-about .ab-cta__arrow {
  font-family: var(--hs-font-mono);
  color: var(--hs-orange);
  flex: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .ab-partner--cta {
    grid-column: 1 / -1;
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .ab-split {
    grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .ab-version {
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: start;
    gap: 24px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

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

  .page-about .ab-partner--cta {
    grid-column: auto;
  }

  .page-about .ab-mile__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1100px) {
  .page-about .ab-standards__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-standard {
    gap: 12px;
    padding: 26px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-version,
  .page-about .ab-version::before,
  .page-about .ab-version__no,
  .page-about .ab-cta__link {
    transition: none;
  }
}