.page-about {
  background: var(--ink);
  color: var(--bone);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .about-crumbs { padding-top: 18px; }
.page-about .about-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
}
.page-about .about-crumbs .crumbs li { display: inline-flex; align-items: center; }
.page-about .about-crumbs .crumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--line-strong);
}
.page-about .about-crumbs .crumbs a {
  color: var(--stone);
  text-decoration: none;
  transition: color 0.12s ease;
}
.page-about .about-crumbs .crumbs a:hover,
.page-about .about-crumbs .crumbs a:focus-visible { color: var(--lime); }

/* 首屏 */
.page-about .about-hero { padding: 20px 0 0; }
.page-about .about-hero__inner { display: grid; gap: 26px; }
.page-about .eyebrow {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 8.6vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--bone);
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--lime);
}
.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.65;
  color: rgba(242, 240, 230, 0.82);
}
.page-about .about-hero__facts {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-hero__facts li {
  display: flex;
  gap: 10px;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--stone);
}
.page-about .about-hero__facts li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: 7px;
  background: var(--lime);
}
.page-about .about-hero__figure { margin: 0; }
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  filter: saturate(0.72) contrast(1.06);
}
.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

@media (min-width: 640px) {
  .page-about .about-hero__facts { grid-template-columns: repeat(3, 1fr); gap: 14px; }
}
@media (min-width: 960px) {
  .page-about .about-hero { padding-top: 30px; }
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    gap: 46px;
  }
}

/* 通用区块 */
.page-about .about-sec {
  padding: 52px 0;
  border-top: 1px solid var(--line);
  margin-top: 52px;
}
.page-about .about-sec:first-of-type { margin-top: 0; }
@media (min-width: 960px) {
  .page-about .about-sec { padding: 72px 0; margin-top: 72px; }
}

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 24px;
}
.page-about .section-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--clay);
}
.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--bone);
}

/* 三段流程 */
.page-about .about-flow { background: var(--moss); }

.page-about .flow-rail {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 10px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .flow-card {
  flex: 0 0 min(80vw, 310px);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  background: var(--field);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--lime);
}
.page-about .flow-card:nth-child(2) { border-top-color: var(--clay); }
.page-about .flow-card:nth-child(3) { border-top-color: var(--frost); }

.page-about .flow-card__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}
.page-about .flow-card:nth-child(2) .flow-card__num { color: var(--clay); }
.page-about .flow-card:nth-child(3) .flow-card__num { color: var(--frost); }
.page-about .flow-card__stage {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}
.page-about .flow-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--bone);
}
.page-about .flow-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 240, 230, 0.85);
}
.page-about .flow-card__more {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
}
.page-about .flow-card__more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
  transition: color 0.12s ease;
}
.page-about .flow-card__more summary::-webkit-details-marker { display: none; }
.page-about .flow-card__more summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
}
.page-about .flow-card__more[open] summary::after { content: "–"; }
.page-about .flow-card__more summary:hover { color: var(--bone); }
.page-about .flow-card__more summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}
.page-about .flow-card__more p {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .about-banner { margin: 30px 0 0; }
.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  filter: saturate(0.62) contrast(1.05);
}
.page-about .about-banner figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

@media (min-width: 960px) {
  .page-about .flow-rail {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .flow-card { flex: none; }
}

/* 年份档案 */
.page-about .archive { display: grid; gap: 22px; }
.page-about .archive__axis {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}
.page-about .archive__node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  color: var(--stone);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  transition: color 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}
.page-about .archive__node:hover,
.page-about .archive__node:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .archive__item {
  position: relative;
  padding: 0 0 32px 20px;
  border-left: 2px solid var(--line);
  scroll-margin-top: 120px;
}
.page-about .archive__item:last-child { padding-bottom: 0; border-left-color: var(--lime); }
.page-about .archive__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.8vw, 40px);
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--lime);
}
.page-about .archive__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--bone);
}
.page-about .archive__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(242, 240, 230, 0.78);
}

@media (min-width: 960px) {
  .page-about .archive {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 44px;
  }
  .page-about .archive__axis {
    position: relative;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 4px 0;
  }
  .page-about .archive__axis::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: var(--line-strong);
  }
  .page-about .archive__node {
    position: relative;
    padding: 0 0 30px 26px;
    border: 0;
    background: none;
    font-size: 14px;
    white-space: normal;
  }
  .page-about .archive__node::before {
    content: "";
    position: absolute;
    left: 0;
    top: 3px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--moss);
    border: 1px solid var(--stone);
    transition: background 0.15s ease, border-color 0.15s ease;
  }
  .page-about .archive__node:last-child { padding-bottom: 0; }
  .page-about .archive__node:hover,
  .page-about .archive__node:focus-visible {
    background: none;
    color: var(--lime);
  }
  .page-about .archive__node:hover::before,
  .page-about .archive__node:focus-visible::before {
    background: var(--lime);
    border-color: var(--lime);
  }
  .page-about .archive__item { border-left: 0; padding-left: 0; padding-bottom: 38px; }
}

/* 团队分工 */
.page-about .about-crew { background: var(--moss); }

.page-about .crew-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 28px;
}
.page-about .crew-bar__seg {
  position: relative;
  flex: 1 1 44%;
  min-width: 0;
  padding: 14px 12px;
  background: var(--field);
  border: 1px solid var(--line-strong);
  transition: background 0.14s ease;
}
.page-about .crew-bar__seg:hover { background: #26594A; }
.page-about .crew-bar__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}
.page-about .crew-bar__name {
  display: block;
  margin-top: 7px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .crew-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .crew-list li {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.page-about .crew-list strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--bone);
}
.page-about .crew-list span {
  font-size: 14px;
  line-height: 1.62;
  color: rgba(242, 240, 230, 0.78);
}

@media (min-width: 900px) {
  .page-about .crew-bar { flex-wrap: nowrap; gap: 3px; }
  .page-about .crew-bar__seg { flex: 0 1 0; padding: 18px 14px 16px; }
  .page-about .crew-bar__seg:nth-child(1) { flex-grow: 18; }
  .page-about .crew-bar__seg:nth-child(2) { flex-grow: 9; }
  .page-about .crew-bar__seg:nth-child(3) { flex-grow: 11; }
  .page-about .crew-bar__seg:nth-child(4) { flex-grow: 4; }
  .page-about .crew-bar__seg::after {
    content: attr(data-note);
    position: absolute;
    left: 0;
    bottom: calc(100% + 8px);
    width: 210px;
    padding: 9px 11px;
    background: var(--ink);
    border: 1px solid var(--line-strong);
    color: var(--bone);
    font-size: 12px;
    line-height: 1.55;
    letter-spacing: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.16s ease;
    z-index: 5;
  }
  .page-about .crew-bar__seg:hover::after,
  .page-about .crew-bar__seg:focus-within::after {
    opacity: 1;
    visibility: visible;
  }
  .page-about .crew-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 34px; }
}

/* 校对 */
.page-about .about-check__grid { display: grid; gap: 26px; }
.page-about .about-check__figure { margin: 0; }
.page-about .about-check__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  filter: saturate(0.6) contrast(1.05);
}
.page-about .about-check__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}
.page-about .about-check__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.68;
  color: rgba(242, 240, 230, 0.82);
}
.page-about .check-steps {
  display: grid;
  gap: 12px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}
.page-about .check-steps li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.62;
  color: rgba(242, 240, 230, 0.8);
}
.page-about .check-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--clay);
}
.page-about .check-steps strong {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--clay);
  text-transform: uppercase;
}
.page-about .about-check blockquote {
  margin: 22px 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--lime);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--bone);
}

@media (min-width: 900px) {
  .page-about .about-check__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .about-check blockquote { font-size: 20px; }
}

/* 覆盖范围 */
.page-about .about-scope { background: var(--moss); }

.page-about .scope-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 24px;
}
.page-about .scope-stat {
  padding: 18px 16px;
  background: var(--field);
  border: 1px solid var(--line);
}
.page-about .scope-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}
.page-about .scope-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}
.page-about .scope-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}
.page-about .scope-tags li {
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bone);
}
.page-about .about-scope__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.68;
  color: rgba(242, 240, 230, 0.82);
}

@media (min-width: 760px) {
  .page-about .scope-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2px; }
}

/* 收尾 */
.page-about .about-cta {
  margin-top: 52px;
  padding: 48px 0;
  background: var(--lime);
  color: var(--ink);
}
.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.2vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.page-about .about-cta__text {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.62;
  color: rgba(11, 15, 12, 0.78);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-cta__links .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  background: var(--ink);
  color: var(--bone);
  border: 1px solid var(--ink);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background 0.14s ease, color 0.14s ease;
}
.page-about .about-cta__links .btn:hover {
  background: var(--moss);
  color: var(--bone);
}
.page-about .about-cta__links .btn:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

@media (min-width: 960px) {
  .page-about .about-cta { margin-top: 72px; padding: 68px 0; }
}

/* 动效降级兜底 */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}