.page-about {
  --ab-rule: rgba(6, 18, 13, 0.16);
  --ab-rule-inverse: rgba(244, 240, 230, 0.22);
}

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

.page-about .media-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  padding: 10px 12px;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(200, 255, 61, 0.16), transparent 60%),
    radial-gradient(100% 80% at 92% 12%, rgba(11, 29, 58, 0.92), transparent 66%),
    linear-gradient(165deg, var(--c-green) 0%, var(--c-blue) 68%, var(--c-ink) 100%);
  color: var(--c-white);
  padding-block: clamp(18px, 3vw, 32px) clamp(44px, 8vw, 96px);
}

.page-about .ab-crumb {
  margin-bottom: clamp(22px, 4vw, 44px);
}

.page-about .ab-crumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

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

.page-about .ab-crumb li + li::before {
  content: "/";
  color: rgba(169, 184, 174, 0.7);
}

.page-about .ab-crumb a,
.page-about .ab-crumb span {
  color: var(--c-mist);
  text-decoration: none;
}

.page-about .ab-crumb a:hover,
.page-about .ab-crumb a:focus-visible {
  color: var(--c-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-crumb [aria-current="page"] {
  color: var(--c-white);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: clamp(26px, 5vw, 56px);
  align-items: start;
}

.page-about .ab-hero-copy .eyebrow {
  color: var(--c-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin: 0 0 14px;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  max-width: 17ch;
}

.page-about .ab-hero-copy .lede {
  color: rgba(244, 240, 230, 0.86);
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.75;
  max-width: 48ch;
  margin: 0;
}

.page-about .ab-hero-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 46ch;
}

.page-about .ab-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 9px;
  border-bottom: 2px solid rgba(244, 240, 230, 0.16);
}

.page-about .ab-fact-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(17px, 3vw, 22px);
  color: var(--c-lime);
  min-width: 5.6ch;
  line-height: 1.1;
}

.page-about .ab-fact-txt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-mist);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-hero-actions .btn {
  text-decoration: none;
}

.page-about .ab-hero-actions .btn--ghost {
  border: 3px solid var(--c-white);
  color: var(--c-white);
  background: transparent;
}

.page-about .ab-hero-actions .btn--ghost:hover,
.page-about .ab-hero-actions .btn--ghost:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

.page-about .ab-hero-media {
  margin: 0;
  background: var(--c-ink);
  border: 3px solid var(--c-lime);
  box-shadow: 8px 8px 0 rgba(6, 18, 13, 0.85);
}

.page-about .ab-hero-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-hero-media .media-caption {
  color: var(--c-mist);
  border-top: 2px solid rgba(244, 240, 230, 0.18);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  background: linear-gradient(180deg, var(--c-pale) 0%, #dcebd9 100%);
  color: var(--c-green);
  padding-block: clamp(48px, 8vw, 104px);
}

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

.page-about .ab-index .index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-amber-deep);
  margin: 0 0 12px;
}

.page-about .ab-index .section-title {
  color: var(--c-green);
  font-size: clamp(23px, 4vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-about .ab-index-note {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-amber-deep);
  margin: 16px 0 0;
}

.page-about .ab-timeline-list {
  display: grid;
  gap: 14px;
  border-left: 3px solid rgba(6, 18, 13, 0.2);
  padding-left: clamp(14px, 3vw, 30px);
}

.page-about .ab-node {
  background: var(--c-white);
  border: 3px solid var(--c-ink);
  box-shadow: 4px 4px 0 var(--c-ink);
}

.page-about .ab-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t);
}

.page-about .ab-node summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-node summary:hover {
  background: rgba(200, 255, 61, 0.14);
}

.page-about .ab-node summary:focus-visible {
  outline: 3px solid var(--c-amber-deep);
  outline-offset: 3px;
}

.page-about .ab-node summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-amber-deep);
}

.page-about .ab-node[open] summary::after {
  content: "－";
}

.page-about .ab-node-year {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  background: var(--c-lime);
  color: var(--c-ink);
  border: 2px solid var(--c-ink);
}

.page-about .ab-node[open] .ab-node-year {
  background: var(--c-amber);
}

.page-about .ab-node-title {
  font-weight: 800;
  font-size: clamp(16px, 2.4vw, 19px);
  color: var(--c-green);
  line-height: 1.4;
}

.page-about .ab-node-body {
  padding: 12px 16px 16px;
  border-top: 2px dashed var(--ab-rule);
}

.page-about .ab-node-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #2a3a31;
  max-width: 58ch;
}

.page-about .ab-node-media {
  margin: 0;
  background: var(--c-ink);
  border: 3px solid var(--c-ink);
  box-shadow: 6px 6px 0 rgba(6, 18, 13, 0.8);
}

.page-about .ab-node-media img {
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .ab-node-media .media-caption {
  color: var(--c-mist);
  border-top: 2px solid rgba(244, 240, 230, 0.18);
}

/* ---------- 我们为谁开门 ---------- */
.page-about .ab-audience {
  background: linear-gradient(180deg, var(--c-blue) 0%, var(--c-green) 76%, var(--c-ink) 100%);
  color: var(--c-white);
  padding-block: clamp(48px, 8vw, 104px);
}

.page-about .ab-audience .eyebrow {
  color: var(--c-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .ab-audience .section-title {
  color: var(--c-white);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about .ab-audience .lede {
  color: rgba(244, 240, 230, 0.82);
  max-width: 52ch;
  margin: 0;
}

.page-about .ab-aud-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .ab-aud {
  border: 3px solid var(--c-lime);
  background: rgba(6, 18, 13, 0.55);
  padding: 18px 16px 22px;
}

.page-about .ab-aud .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  background: var(--c-lime);
  color: var(--c-ink);
  border: 2px solid var(--c-ink);
}

.page-about .ab-aud h3 {
  font-size: clamp(17px, 2.5vw, 20px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--c-white);
  margin: 12px 0 10px;
}

.page-about .ab-aud p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-mist);
}

/* ---------- 三条运营线 ---------- */
.page-about .ab-lines {
  background: linear-gradient(180deg, var(--c-white) 0%, var(--c-pale) 100%);
  color: var(--c-green);
  padding-block: clamp(48px, 8vw, 104px);
}

.page-about .ab-lines .eyebrow {
  color: var(--c-amber-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .ab-lines .section-title {
  color: var(--c-green);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about .ab-lines .lede {
  color: #3a4d43;
  max-width: 56ch;
  margin: 0;
}

.page-about .ab-line-list {
  margin-top: clamp(24px, 4vw, 42px);
  border-top: 3px solid var(--c-ink);
}

.page-about .ab-line {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 3px solid var(--c-ink);
}

.page-about .ab-line-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1;
  color: var(--c-amber-deep);
  margin: 0;
}

.page-about .ab-line-title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  color: var(--c-green);
  line-height: 1.4;
}

.page-about .ab-line-main p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #2a3a31;
  max-width: 60ch;
}

.page-about .ab-line-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .ab-line-tags .tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border: 2px solid rgba(6, 18, 13, 0.34);
  color: var(--c-green);
  background: transparent;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: linear-gradient(160deg, var(--c-green) 0%, var(--c-blue) 68%, var(--c-ink) 100%);
  color: var(--c-white);
  padding-block: clamp(48px, 8vw, 104px);
}

.page-about .ab-team-grid {
  display: grid;
  gap: clamp(26px, 5vw, 56px);
  align-items: start;
}

.page-about .ab-team-copy .eyebrow {
  color: var(--c-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin: 0 0 12px;
}

.page-about .ab-team .section-title {
  color: var(--c-white);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about .ab-team-copy > p:not(.eyebrow) {
  color: rgba(244, 240, 230, 0.84);
  font-size: 15.5px;
  line-height: 1.8;
  max-width: 52ch;
  margin: 0;
}

.page-about .ab-roles {
  margin-top: 24px;
  border-top: 2px solid var(--ab-rule-inverse);
}

.page-about .ab-role {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 2px solid var(--ab-rule-inverse);
}

.page-about .ab-role-name {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-lime);
  margin: 0;
}

.page-about .ab-role-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-about .ab-team-media {
  margin: 0;
  background: var(--c-ink);
  border: 3px solid var(--c-lime);
  box-shadow: 8px 8px 0 rgba(6, 18, 13, 0.85);
}

.page-about .ab-team-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team-media .media-caption {
  color: var(--c-mist);
  border-top: 2px solid rgba(244, 240, 230, 0.18);
}

/* ---------- 数字看台 ---------- */
.page-about .ab-stats-sec {
  background: var(--c-pale);
  color: var(--c-green);
  padding-block: clamp(48px, 8vw, 104px);
}

.page-about .ab-stats-sec .eyebrow {
  color: var(--c-amber-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .ab-stats-sec .section-title {
  color: var(--c-green);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about .ab-stats-sec .lede {
  color: #3a4d43;
  max-width: 54ch;
  margin: 0;
}

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

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: var(--c-green);
  background: var(--c-white);
  border: 3px solid var(--c-ink);
  box-shadow: 4px 4px 0 var(--c-ink);
  padding: 16px 14px 18px;
  transition: transform var(--t), box-shadow var(--t);
}

.page-about .ab-stat:hover,
.page-about .ab-stat:focus-visible {
  transform: translate(-2px, -3px);
  box-shadow: 8px 8px 0 var(--c-ink);
}

.page-about .ab-stat:focus-visible {
  outline: 3px solid var(--c-amber-deep);
  outline-offset: 3px;
}

.page-about .ab-stat-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1;
  color: var(--c-green);
}

.page-about .ab-stat-label {
  font-size: 14px;
  font-weight: 800;
  color: var(--c-green);
}

.page-about .ab-stat-desc {
  font-size: 13px;
  line-height: 1.6;
  color: #41564a;
}

.page-about .ab-stat-more {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-amber-deep);
}

/* ---------- 结尾 ---------- */
.page-about .ab-cta {
  background:
    radial-gradient(90% 80% at 88% 0%, rgba(200, 255, 61, 0.14), transparent 62%),
    linear-gradient(150deg, var(--c-blue) 0%, var(--c-green) 100%);
  color: var(--c-white);
  padding-block: clamp(44px, 7vw, 96px);
}

.page-about .ab-cta .eyebrow {
  color: var(--c-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin: 0 0 12px;
}

.page-about .ab-cta .section-title {
  color: var(--c-white);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about .ab-cta .lede {
  color: rgba(244, 240, 230, 0.84);
  max-width: 50ch;
  margin: 0;
}

.page-about .ab-cta-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .ab-cta-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  border: 3px solid var(--c-lime);
  background: rgba(6, 18, 13, 0.42);
  color: var(--c-white);
  padding: 16px;
  transition: background var(--t), color var(--t), transform var(--t);
}

.page-about .ab-cta-link:hover,
.page-about .ab-cta-link:focus-visible {
  background: var(--c-lime);
  color: var(--c-ink);
  transform: translateY(-2px);
}

.page-about .ab-cta-link:focus-visible {
  outline: 3px solid var(--c-white);
  outline-offset: 3px;
}

.page-about .ab-cta-k {
  font-size: 16px;
  font-weight: 800;
}

.page-about .ab-cta-v {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-mist);
}

.page-about .ab-cta-link:hover .ab-cta-v,
.page-about .ab-cta-link:focus-visible .ab-cta-v {
  color: #123022;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-role {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }

  .page-about .ab-line {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 820px) {
  .page-about .ab-aud-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .ab-split {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .ab-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .ab-team-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .ab-line {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stat,
  .page-about .ab-cta-link,
  .page-about .ab-node summary {
    transition: none;
  }

  .page-about .ab-stat:hover,
  .page-about .ab-stat:focus-visible,
  .page-about .ab-cta-link:hover,
  .page-about .ab-cta-link:focus-visible {
    transform: none;
  }
}