.page-about {
  --ab-warm-line: #c9c0ac;
  background: var(--hx-void);
  color: var(--hx-paper);
  font-family: var(--hx-font-body);
  overflow-x: clip;
}

.page-about .ab-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
  filter: saturate(0.92) contrast(1.02);
}

.page-about .ab-figcap {
  margin: 12px 0 0;
  font-family: var(--hx-font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--hx-dim);
}

.page-about .ab-eyebrow {
  margin: 0 0 12px;
  font-family: var(--hx-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--hx-signal);
}

.page-about .ab-eyebrow--ink {
  color: #0f6b57;
}

.page-about .ab-h2 {
  margin: 0 0 16px;
  font-family: var(--hx-font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--hx-paper);
}

.page-about .ab-h2--ink {
  color: var(--hx-ink);
}

.page-about .ab-section {
  position: relative;
  padding-block: clamp(48px, 6.5vw, 92px);
}

.page-about .ab-link {
  color: var(--hx-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 192, 0.4);
  padding-bottom: 1px;
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  border-bottom-color: var(--hx-signal);
}

.page-about .ab-btn--ink {
  color: var(--hx-ink);
  border-color: rgba(20, 24, 31, 0.35);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(61, 242, 192, 0.1) 0%, rgba(6, 10, 20, 0) 44%),
    radial-gradient(120% 86% at 82% -14%, rgba(110, 155, 255, 0.18) 0%, rgba(6, 10, 20, 0) 62%),
    var(--hx-void);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 54, 72, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 54, 72, 0.4) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: min(70vw, 560px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 178, 63, 0.24) 0%, rgba(244, 178, 63, 0) 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(20px, 3vw, 32px) clamp(44px, 6vw, 84px);
}

.page-about .ab-crumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
}

.page-about .ab-hero__rail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  order: -1;
}

.page-about .ab-hero__rail-note {
  margin: 0;
  font-family: var(--hx-font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--hx-dim);
  white-space: nowrap;
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--hx-font-display);
  font-weight: 800;
  font-size: clamp(40px, 11vw, 62px);
  line-height: 0.96;
  letter-spacing: 0.02em;
  color: var(--hx-paper);
}

.page-about .ab-hero__lead {
  margin: 0 0 16px;
  max-width: 46ch;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.6;
  color: var(--hx-paper);
}

.page-about .ab-hero__text {
  margin: 0 0 26px;
  max-width: 56ch;
  color: var(--hx-mist);
}

.page-about .ab-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--hx-line);
}

.page-about .ab-hero__stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
}

.page-about .ab-hero__stat-value {
  margin: 0;
  font-family: var(--hx-font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1;
  color: var(--hx-signal);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-hero__stat-value span {
  display: block;
  margin-top: 6px;
  font-family: var(--hx-font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--hx-mist);
}

.page-about .ab-hero__stat-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--hx-dim);
}

/* ---------- 起源 ---------- */
.page-about .ab-origin {
  background: var(--hx-deep);
  border-top: 1px solid var(--hx-line);
}

.page-about .ab-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .ab-origin__copy .hx-text + .hx-text {
  margin-top: 14px;
}

.page-about .ab-origin__panel {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(160deg, rgba(24, 35, 56, 0.95) 0%, rgba(16, 24, 39, 0.95) 100%);
  border-left: 2px solid var(--hx-amber);
}

.page-about .ab-origin__year {
  margin: 0;
  font-family: var(--hx-font-mono);
  font-size: clamp(54px, 8vw, 96px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--hx-amber);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-origin__caption {
  margin: 12px 0 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--hx-mist);
}

.page-about .ab-origin__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-origin__list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--hx-line);
  font-size: 14px;
  color: var(--hx-mist);
}

.page-about .ab-origin__num {
  flex: 0 0 auto;
  min-width: 76px;
  font-family: var(--hx-font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--hx-signal);
  font-variant-numeric: tabular-nums;
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .ab-roles {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.page-about .ab-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name num"
    "bar  bar"
    "desc desc";
  gap: 8px 12px;
  align-items: center;
}

.page-about .ab-role__name {
  grid-area: name;
  font-family: var(--hx-font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--hx-paper);
}

.page-about .ab-role__num {
  grid-area: num;
  font-family: var(--hx-font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--hx-amber);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-role__bar {
  grid-area: bar;
  display: block;
  height: 4px;
  background: var(--hx-line);
}

.page-about .ab-role__fill {
  display: block;
  height: 100%;
  background: var(--hx-signal);
}

.page-about .ab-role__fill--a { width: 55.3%; }
.page-about .ab-role__fill--b { width: 23.7%; background: var(--hx-track); }
.page-about .ab-role__fill--c { width: 21%; background: var(--hx-amber); }

.page-about .ab-role__desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.7;
  color: var(--hx-mist);
}

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

/* ---------- 校对路径 ---------- */
.page-about .ab-flow {
  background: var(--hx-deep);
  border-top: 1px solid var(--hx-line);
  border-bottom: 1px solid var(--hx-line);
}

.page-about .ab-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .ab-steps {
  margin-top: 26px;
  border-top: 1px solid var(--hx-line);
}

.page-about .ab-step {
  border-bottom: 1px solid var(--hx-line);
}

.page-about .ab-step__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-step__head::-webkit-details-marker,
.page-about .ab-step__head::marker {
  display: none;
  content: "";
}

.page-about .ab-step__head:focus-visible {
  outline: 2px solid var(--hx-signal);
  outline-offset: 3px;
}

.page-about .ab-step__idx {
  font-family: var(--hx-font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--hx-signal);
  letter-spacing: 0.06em;
}

.page-about .ab-step__name {
  font-family: var(--hx-font-display);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--hx-paper);
}

.page-about .ab-step__time {
  font-family: var(--hx-font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--hx-amber);
  white-space: nowrap;
}

.page-about .ab-step__body {
  padding: 0 0 20px;
}

.page-about .ab-step__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hx-mist);
}

.page-about .ab-step[open] .ab-step__name {
  color: var(--hx-paper);
}

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

/* ---------- 年份轴 ---------- */
.page-about .ab-timeline__head {
  max-width: 62ch;
}

.page-about .ab-timeline__media {
  margin: clamp(26px, 4vw, 44px) 0 clamp(30px, 4vw, 52px);
}

.page-about .ab-years {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--hx-line);
}

.page-about .ab-year {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0 18px 24px;
  transition: background-color 180ms ease;
}

.page-about .ab-year::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 26px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--hx-line);
  transition: background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.page-about .ab-year:hover::before,
.page-about .ab-year:focus-within::before {
  background: var(--hx-amber);
  box-shadow: 0 0 0 5px rgba(244, 178, 63, 0.16);
  transform: scale(1.15);
}

.page-about .ab-year:hover .ab-year__mark {
  color: var(--hx-amber);
}

.page-about .ab-year__mark {
  font-family: var(--hx-font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--hx-signal);
  font-variant-numeric: tabular-nums;
  transition: color 160ms ease;
}

.page-about .ab-year__title {
  margin: 0 0 6px;
  font-family: var(--hx-font-display);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--hx-paper);
}

.page-about .ab-year__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hx-mist);
}

/* ---------- 笃定赛场（暖纸反转带） ---------- */
.page-about .ab-method {
  background: var(--hx-warm);
  color: var(--hx-ink);
}

.page-about .ab-method::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(20, 24, 31, 0.05) 0px,
    rgba(20, 24, 31, 0.05) 1px,
    transparent 1px,
    transparent 14px
  );
  pointer-events: none;
}

.page-about .ab-method .hx-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-method__head {
  max-width: 62ch;
}

.page-about .ab-method__lead {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: #3c4453;
}

.page-about .ab-phases {
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .ab-phase {
  padding: 22px 20px 24px;
  background: rgba(255, 255, 255, 0.55);
  border-top: 3px solid var(--hx-ink);
}

.page-about .ab-phase__no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  font-family: var(--hx-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--hx-ink);
  background: var(--hx-amber);
}

.page-about .ab-phase__title {
  margin: 0 0 10px;
  font-family: var(--hx-font-display);
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--hx-ink);
}

.page-about .ab-phase p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3c4453;
}

.page-about .ab-method__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3.5vw, 40px);
}

/* ---------- 内容生态 ---------- */
.page-about .ab-eco {
  background: var(--hx-void);
}

.page-about .ab-eco__head {
  max-width: 64ch;
}

.page-about .ab-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 46px);
  background: var(--hx-line);
  border: 1px solid var(--hx-line);
}

.page-about .ab-eco__card {
  padding: clamp(22px, 3vw, 32px);
  background: var(--hx-panel);
}

.page-about .ab-eco__num {
  margin: 0 0 8px;
  font-family: var(--hx-font-mono);
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--hx-signal);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-eco__title {
  margin: 0 0 10px;
  font-family: var(--hx-font-display);
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--hx-paper);
}

.page-about .ab-eco__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hx-mist);
}

.page-about .ab-eco__note {
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: 22px;
  border-top: 1px solid var(--hx-line);
}

.page-about .ab-eco__note .hx-text {
  margin: 0;
  max-width: 68ch;
  color: var(--hx-mist);
}

/* ---------- 结尾 ---------- */
.page-about .ab-close {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(90% 120% at 8% 110%, rgba(61, 242, 192, 0.16) 0%, rgba(6, 10, 20, 0) 62%),
    var(--hx-abyss);
  border-top: 1px solid var(--hx-line);
}

.page-about .ab-close__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding-block: clamp(44px, 6vw, 84px);
}

.page-about .ab-close__copy .hx-text {
  margin: 0;
  max-width: 58ch;
  color: var(--hx-mist);
}

.page-about .ab-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .ab-close__mail {
  flex: 1 0 100%;
  margin: 6px 0 0;
  font-family: var(--hx-font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--hx-signal);
  user-select: all;
  overflow-wrap: anywhere;
}

.page-about .ab-close__hint {
  flex: 1 0 100%;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--hx-dim);
}

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

  .page-about .ab-phases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 860px) {
  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.95fr);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-flow__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.85fr);
  }

  .page-about .ab-flow__media {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-year {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-about .ab-year__mark {
    text-align: right;
  }

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

  .page-about .ab-close__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .ab-phases {
    margin-top: clamp(32px, 4vw, 52px);
  }
}

@media (min-width: 980px) {
  .page-about .ab-hero__grid {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: stretch;
    min-height: 340px;
  }

  .page-about .ab-hero__rail {
    flex-direction: row-reverse;
    align-items: flex-start;
    gap: 18px;
    order: 0;
  }

  .page-about .ab-hero__rail-note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    padding-top: 4px;
  }

  .page-about .ab-hero__title {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-size: clamp(52px, 5.2vw, 84px);
    line-height: 1;
    letter-spacing: 0.14em;
  }

  .page-about .ab-hero__copy {
    padding-top: 8px;
    border-left: 1px solid var(--hx-line);
    padding-left: clamp(24px, 3vw, 44px);
  }

  .page-about .ab-role {
    grid-template-columns: 118px auto minmax(0, 1fr);
    grid-template-areas:
      "name bar num"
      "desc desc desc";
    column-gap: 14px;
  }

  .page-about .ab-role__bar {
    align-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-year,
  .page-about .ab-year::before,
  .page-about .ab-year__mark {
    transition: none;
  }
}
<<<END>>>