.page-about {
  background: var(--bg);
  color: var(--text);
}

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(160deg, rgba(199, 255, 62, 0.08) 0%, rgba(199, 255, 62, 0) 42%),
    linear-gradient(200deg, rgba(255, 138, 61, 0.09) 0%, rgba(255, 138, 61, 0) 34%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  top: -30%;
  width: 70%;
  height: 160%;
  background: linear-gradient(120deg, rgba(11, 36, 29, 0.9), rgba(18, 53, 43, 0.55));
  transform: skewX(-14deg);
  border-left: 1px solid var(--line-soft);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 28px;
  padding-bottom: 44px;
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  font-weight: 800;
  margin: 14px 0 0;
  color: var(--white-000);
  max-width: 20ch;
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .ab-figures {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .ab-figure {
  background: var(--ink-800);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-figure__num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--lime-400);
  letter-spacing: -0.02em;
}

.page-about .ab-figure__unit {
  font-size: 14px;
  margin-left: 2px;
  color: var(--lime-400);
}

.page-about .ab-figure__label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .ab-sec {
  padding: 44px 0 8px;
}

.page-about .ab-sec--surface {
  background: var(--ink-900);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 40px;
  margin-top: 32px;
}

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

.page-about .ab-head-text h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.18;
  font-weight: 800;
  margin: 0;
  color: var(--white-000);
  max-width: 26ch;
}

.page-about .ab-lead {
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper-100);
  margin: 20px 0 0;
}

.page-about .ab-lead--wide {
  max-width: 66ch;
  color: var(--text-dim);
}

/* 01 档案 */
.page-about .ab-archive {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

.page-about .ab-era {
  position: relative;
  padding: 0 0 26px;
}

.page-about .ab-era:last-child {
  padding-bottom: 4px;
}

.page-about .ab-era::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 5px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--bg);
  transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .ab-era:hover::before,
.page-about .ab-era:focus-within::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(199, 255, 62, 0.12);
}

.page-about .ab-era__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--lime-400);
  border: 1px solid var(--line);
  padding: 3px 8px;
  border-radius: var(--radius);
}

.page-about .ab-era h3 {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 700;
  margin: 10px 0 8px;
  color: var(--white-000);
}

.page-about .ab-era p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 60ch;
}

.page-about .ab-era__note {
  border-left: 2px solid var(--lime-400);
  padding: 6px 0 6px 12px;
  font-size: 13px;
  color: var(--paper-300);
  background: linear-gradient(90deg, rgba(199, 255, 62, 0.07), rgba(199, 255, 62, 0));
}

.page-about .ab-era__note-num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--lime-400);
  margin-right: 6px;
  vertical-align: -1px;
}

.page-about .ab-archive__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .ab-figure-media {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
  overflow: hidden;
}

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

.page-about .ab-figure-media figcaption {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-aside-card {
  border: 1px solid var(--line);
  background: var(--ink-700);
  padding: 16px 18px;
}

.page-about .ab-aside-card__title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--lime-400);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about .ab-aside-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* 02 订阅体系 */
.page-about .ab-split {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

.page-about .ab-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-list li {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  padding: 14px 0 14px 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 2px;
  background: var(--accent);
}

.page-about .ab-list strong {
  color: var(--paper-100);
  font-weight: 600;
}

.page-about .ab-split__side {
  display: grid;
  gap: 14px;
}

.page-about .ab-side-block {
  border: 1px solid var(--line);
  background: var(--ink-700);
  padding: 16px 18px;
}

.page-about .ab-side-block--accent {
  border-color: rgba(255, 138, 61, 0.55);
  background: linear-gradient(160deg, rgba(255, 138, 61, 0.12), rgba(18, 53, 43, 0.9));
}

.page-about .ab-side-block__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--lime-400);
  letter-spacing: -0.02em;
}

.page-about .ab-side-block--accent .ab-side-block__num {
  color: var(--orange-500);
}

.page-about .ab-side-block__label {
  margin: 8px 0 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--white-000);
}

.page-about .ab-side-block__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--text-dim);
}

/* 03 数据方法 */
.page-about .ab-data {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-step {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--lime-400);
  background: var(--ink-700);
  padding: 14px 16px 16px;
}

.page-about .ab-step__time {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--lime-400);
}

.page-about .ab-step h3 {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  font-weight: 700;
  margin: 8px 0 6px;
  color: var(--white-000);
}

.page-about .ab-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .ab-data__paper {
  background: var(--paper-100);
  color: var(--ink-800);
  border: 1px solid var(--paper-300);
  padding: 16px;
}

.page-about .ab-figure-media--paper {
  border-color: var(--paper-300);
  background: var(--paper-300);
}

.page-about .ab-figure-media--paper figcaption {
  color: var(--ink-800);
  border-top-color: var(--paper-300);
}

.page-about .ab-paper-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin: 16px 0 10px;
  color: var(--ink-800);
}

.page-about .ab-chip-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
  padding: 0;
}

.page-about .ab-paper-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-800);
}

/* 04 团队 */
.page-about .ab-team {
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-about .ab-team .tab-strip {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-team .tab-panel {
  padding: 18px 16px 20px;
}

.page-about .ab-team-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
}

.page-about .ab-team-panel__num {
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 0.9;
  margin: 0;
  color: var(--lime-400);
  letter-spacing: -0.03em;
}

.page-about .ab-team-panel h3 {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--white-000);
}

.page-about .ab-team-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* 05 生态 */
.page-about .ab-eco {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.page-about .ab-eco__text p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
  margin: 14px 0 0;
  max-width: 62ch;
}

.page-about .ab-eco__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .ab-eco__grid {
  display: grid;
  gap: 14px;
}

.page-about .ab-eco__figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
  overflow: hidden;
}

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

.page-about .ab-eco__figure figcaption {
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
  border-top: 1px solid var(--line-soft);
}

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

.page-about .ab-eco__stats li {
  background: var(--ink-800);
  padding: 14px 16px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .ab-eco__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--lime-400);
}

.page-about .ab-eco__unit {
  font-size: 13px;
}

.page-about .ab-eco__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

/* 下一步 */
.page-about .ab-next {
  padding: 40px 0 56px;
}

.page-about .ab-next__inner {
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(199, 255, 62, 0.1), rgba(18, 53, 43, 0.92) 45%);
  padding: 22px 18px 24px;
  display: grid;
  gap: 20px;
}

.page-about .ab-next__title {
  font-family: var(--font-display);
  font-size: clamp(20px, 4.2vw, 28px);
  line-height: 1.2;
  font-weight: 800;
  color: var(--white-000);
  margin: 8px 0 0;
  max-width: 24ch;
}

.page-about .ab-next__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 54ch;
}

.page-about .ab-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-next__links li a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--paper-100);
  font-size: 14px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: rgba(7, 26, 21, 0.5);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .ab-next__links li a:hover,
.page-about .ab-next__links li a:focus-visible {
  border-color: var(--accent);
  background: rgba(7, 26, 21, 0.8);
}

.page-about .ab-next__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime-400);
  border: 1px solid var(--line);
  padding: 2px 6px;
  flex: none;
}

.page-about .ab-next__links li a:hover .ab-next__idx {
  border-color: var(--accent);
}

@media (min-width: 720px) {
  .page-about .ab-hero__inner {
    padding-top: 36px;
    padding-bottom: 56px;
  }

  .page-about .ab-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-figure__num {
    font-size: 32px;
  }

  .page-about .ab-sec {
    padding-top: 58px;
  }

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

  .page-about .ab-eco__grid {
    grid-template-columns: 1.05fr 1fr;
    align-items: start;
  }

  .page-about .ab-eco__stats {
    align-content: start;
  }

  .page-about .ab-team-panel {
    gap: 22px;
  }

  .page-about .ab-team-panel__num {
    font-size: 56px;
  }

  .page-about .ab-next__inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    padding: 28px 26px 30px;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero__title {
    max-width: 22ch;
  }

  .page-about .ab-hero__lede {
    font-size: 17px;
  }

  .page-about .ab-archive {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-archive__aside {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.72fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .ab-data {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .ab-eco {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-team .tab-panel {
    padding: 24px 26px 26px;
  }

  .page-about .ab-next {
    padding: 52px 0 72px;
  }
}

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