.page-about {
  background: var(--paper);
  color: var(--carbon);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  background-color: var(--ink);
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0 47px,
    rgba(255, 255, 255, 0.04) 47px 48px
  );
  color: var(--paper);
  padding: 24px 0 52px;
  border-bottom: 8px solid var(--anbo-red);
}

.page-about .about-hero__crumb {
  color: rgba(244, 241, 236, 0.6);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .about-hero__crumb a {
  color: rgba(244, 241, 236, 0.8);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--amber);
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: 22px;
  padding: 30px 18px 32px;
  border: 1px solid var(--glass-line);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0) 62%);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--amber);
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
}

.page-about .about-hero__eyebrow {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--paper);
}

.page-about .about-hero__lede {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(244, 241, 236, 0.86);
  margin: 0;
  max-width: 58ch;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--glass-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 12px;
}

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

.page-about .about-hero__stat .data-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-hero__stat-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(244, 241, 236, 0.62);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  margin-bottom: 14px;
}

.page-about .about-chapter .chapter__num {
  font-family: var(--font-mono);
  color: var(--anbo-red);
}

.page-about .about-chapter .chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 6px 0 0;
}

.page-about .about-chapter--dark .chapter__title {
  color: var(--paper);
}

.page-about .about-chapter--dark .chapter__num {
  color: var(--amber);
}

.page-about .about-chapter__lede {
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--neutral);
  margin: 0 0 22px;
}

/* ---------- 阶段跳转 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 32px;
}

.page-about .about-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--hair);
  background: var(--pure);
  color: var(--carbon);
  font-size: 13px;
  text-decoration: none;
  border-radius: 2px;
  transition: border-color 180ms ease, color 180ms ease;
}

.page-about .about-jump__link .data-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--anbo-red);
}

.page-about .about-jump__link:hover {
  border-color: var(--anbo-red);
  color: var(--anbo-red);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 12px;
  width: 2px;
  background: var(--anbo-red);
}

.page-about .about-phase {
  position: relative;
  padding-bottom: 40px;
  scroll-margin-top: 96px;
}

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

.page-about .about-phase::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--paper), 0 0 0 6px var(--anbo-red);
}

.page-about .about-phase__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-phase__range {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--anbo-red);
  margin: 0 0 8px;
}

.page-about .about-phase__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--carbon);
}

.page-about .about-phase__text {
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
  max-width: 60ch;
}

.page-about .about-phase__figure {
  margin: 20px 0 0;
}

.page-about .about-phase__figure .media__img,
.page-about .about-team__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-phase__figure .media__caption,
.page-about .about-team__figure .media__caption {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neutral);
  margin-top: 8px;
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  border-left: 2px solid var(--anbo-red);
  padding-left: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--neutral);
  outline: none;
  cursor: default;
}

.page-about .about-note:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .about-note__label {
  display: inline-block;
}

.page-about .about-note__text {
  display: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--carbon);
}

.page-about .about-note:hover .about-note__label,
.page-about .about-note:focus .about-note__label {
  display: none;
}

.page-about .about-note:hover .about-note__text,
.page-about .about-note:focus .about-note__text {
  display: block;
}

/* ---------- 规模数据 ---------- */
.page-about .about-scale {
  background: var(--carbon);
  color: var(--paper);
  padding: 56px 0 60px;
  border-top: 8px solid var(--anbo-red);
  border-bottom: 8px solid var(--anbo-red);
}

.page-about .about-scale__lede {
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 236, 0.7);
  margin: 0 0 26px;
}

.page-about .about-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-items: end;
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  border-top: 2px solid var(--anbo-red);
  border-radius: 2px;
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-metric__title {
  font-size: 15px;
  font-weight: 700;
  margin: 0;
  color: var(--paper);
}

.page-about .about-metric__text {
  font-size: 13px;
  line-height: 1.7;
  margin: 0;
  color: rgba(244, 241, 236, 0.66);
}

/* ---------- 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 28px;
}

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

.page-about .about-team__subtitle {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 16px;
  color: var(--carbon);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-role {
  border-left: 3px solid var(--anbo-red);
  padding-left: 12px;
}

.page-about .about-role strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-about .about-role span {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--neutral);
}

.page-about .about-team__col--rule {
  background: var(--pure);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--amber);
  padding: 20px 18px;
}

.page-about .about-team__text {
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 14px;
}

.page-about .about-team__tag {
  display: inline-block;
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 5px 10px;
  border-radius: 2px;
}

/* ---------- 导航重排 ---------- */
.page-about .about-nav-section {
  background: var(--pure);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-nav__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .about-nav__prose p {
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 14px;
  max-width: 58ch;
}

.page-about .about-nav__link {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--anbo-red);
  text-decoration: none;
  border-bottom: 2px solid var(--anbo-red);
  padding-bottom: 2px;
}

.page-about .about-nav__link:hover {
  color: var(--carbon);
  border-bottom-color: var(--carbon);
}

.page-about .about-nav__panel {
  border: 1px solid var(--hair);
  background: var(--paper);
  padding: 18px 16px 8px;
}

.page-about .about-nav__panel-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--neutral);
  margin: 0 0 12px;
}

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

.page-about .about-nav__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  padding: 8px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-nav__list li:last-child {
  border-bottom: none;
}

.page-about .about-nav__list .data-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--anbo-red);
  min-width: 20px;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-partner {
  padding: 18px 0;
  border-bottom: 1px solid var(--hair);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--steel);
  grid-row: span 2;
}

.page-about .about-partner__title {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
}

.page-about .about-partner__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--neutral);
  margin: 0;
}

.page-about .about-partner__note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--carbon);
  border-left: 3px solid var(--anbo-red);
  padding-left: 14px;
  max-width: 52ch;
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  background: var(--ink);
  color: var(--paper);
  padding: 48px 0 56px;
  border-top: 8px solid var(--anbo-red);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-next__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 236, 0.72);
  margin: 0;
  max-width: 48ch;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-next__actions .btn {
  text-decoration: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 30px 0 64px;
  }

  .page-about .about-hero__frame {
    padding: 40px 32px 44px;
  }

  .page-about .about-hero__title {
    font-size: 46px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-hero__stat .data-num {
    font-size: 34px;
  }

  .page-about .about-chapter .chapter__title {
    font-size: 32px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-nav__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-phase__body {
    grid-template-columns: minmax(0, 1fr) 168px;
    gap: 24px;
  }

  .page-about .about-phase__title {
    font-size: 34px;
  }

  .page-about .about-note {
    border-left: none;
    border-right: 2px solid var(--anbo-red);
    padding: 0 12px 0 0;
    text-align: right;
    margin-top: 6px;
  }

  .page-about .about-note__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.32em;
  }

  .page-about .about-note__text {
    text-align: right;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-metric:nth-child(2) {
    min-height: 188px;
  }

  .page-about .about-metric:nth-child(3) {
    min-height: 164px;
  }

  .page-about .about-metric:nth-child(5) {
    min-height: 176px;
  }

  .page-about .about-metric:nth-child(6) {
    min-height: 200px;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 32px;
    border-top: none;
  }

  .page-about .about-partner {
    grid-template-columns: minmax(0, 1fr);
    border-top: 2px solid var(--anbo-red);
    border-bottom: none;
    padding-top: 20px;
  }

  .page-about .about-partner__num {
    font-size: 44px;
    margin-bottom: 8px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__title {
    font-size: 62px;
    max-width: 20ch;
  }

  .page-about .about-chapter .chapter__title {
    font-size: 38px;
    max-width: 26ch;
  }

  .page-about .about-phase {
    padding-bottom: 52px;
  }

  .page-about .about-phase:nth-child(1) {
    padding-right: 14%;
  }

  .page-about .about-phase:nth-child(2) {
    padding-right: 9%;
  }

  .page-about .about-phase:nth-child(3) {
    padding-right: 4%;
  }

  .page-about .about-phase:nth-child(4) {
    padding-right: 0;
  }

  .page-about .about-phase__figure--wide {
    margin-right: -6%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump__link {
    transition: none;
  }
}
<<<END>>>