.page-about {
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: clamp(20px, 3vw, 32px) 0 clamp(14px, 2vw, 22px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
  padding: clamp(24px, 3.6vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 130% at 12% 0%, rgba(27, 76, 64, 0.72) 0%, rgba(11, 31, 26, 0) 58%),
    linear-gradient(165deg, rgba(244, 239, 226, 0.055), rgba(11, 31, 26, 0) 60%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 6px;
  background-image: repeating-linear-gradient(to right, var(--gold) 0 1px, transparent 1px 20px);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__copy h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 4.8vw, 62px);
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--ivory);
}

.page-about .about-hero__copy .lede {
  margin-top: 18px;
  max-width: 40ch;
}

.page-about .about-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-hero__marks li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__marks .num {
  font-size: 20px;
  font-weight: 600;
  color: var(--gold-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  filter: saturate(0.85) brightness(0.92);
}

.page-about .about-hero__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 页内章节导航 ---------- */
.page-about .about-jump {
  margin: clamp(28px, 4vw, 44px) 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-jump ul {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-jump a {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 16px;
  border: 1px solid rgba(201, 162, 39, 0.22);
  border-radius: 999px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-top: clamp(44px, 6.5vw, 84px);
}

.page-about .about-timeline .section-head .lede {
  max-width: 58ch;
}

.page-about .timeline {
  position: relative;
  margin: clamp(32px, 4.5vw, 56px) 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(201, 162, 39, 0.7), rgba(201, 162, 39, 0.08));
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(26px, 3.6vw, 46px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(11, 31, 26, 1), 0 0 14px rgba(201, 162, 39, 0.45);
}

.page-about .timeline__year {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--gold);
}

.page-about .timeline__card {
  padding: clamp(20px, 2.6vw, 30px) clamp(20px, 2.8vw, 34px);
  border-left: 2px solid var(--line);
}

.page-about .timeline__card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ivory);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 239, 226, 0.86);
}

.page-about .timeline__extra {
  display: grid;
  grid-template-rows: 1fr;
  margin-top: 14px;
  border-top: 1px dashed rgba(201, 162, 39, 0.28);
  padding-top: 14px;
}

.page-about .timeline__extra > p {
  margin: 0;
  min-height: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .timeline__item:hover .timeline__card,
.page-about .timeline__item:focus-within .timeline__card {
  transform: translateY(-4px);
  border-left-color: var(--gold);
}

.page-about .timeline__item .timeline__card {
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

/* ---------- 横向体量数据带 ---------- */
.page-about .about-scale {
  position: relative;
  margin-top: clamp(48px, 7vw, 92px);
  padding: clamp(36px, 5vw, 64px) 0 clamp(32px, 4.5vw, 56px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-scale__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.09;
  filter: saturate(0.6);
  pointer-events: none;
}

.page-about .about-scale__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-scale .section-head .lede {
  max-width: 58ch;
}

.page-about .scale-strip {
  display: flex;
  gap: 0;
  margin-top: clamp(26px, 3.4vw, 42px);
  border-top: 1px solid var(--line);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .scale-cell {
  flex: 0 0 auto;
  min-width: 178px;
  padding: 20px 22px 24px;
  border-right: 1px solid rgba(201, 162, 39, 0.16);
  scroll-snap-align: start;
}

.page-about .scale-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-soft);
}

.page-about .scale-tail {
  font-size: 14px;
  font-weight: 500;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .scale-label {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .scale-hint {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--mist);
  opacity: 0.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(46px, 6.5vw, 88px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 3.6vw, 48px);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  filter: saturate(0.82) brightness(0.9);
}

.page-about .about-team__copy .lede {
  max-width: 56ch;
}

.page-about .team-roles {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .team-role {
  padding-left: 18px;
  border-left: 2px solid rgba(122, 92, 255, 0.55);
}

.page-about .team-role__city {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .team-role h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ivory);
}

.page-about .team-role p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  padding-top: clamp(46px, 6.5vw, 88px);
}

.page-about .about-cadence .section-head .lede {
  max-width: 58ch;
}

.page-about .cadence-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-about .cadence-card {
  padding: 22px 22px 24px;
  border-top: 2px solid var(--line);
}

.page-about .cadence-card__tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 11px;
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.page-about .cadence-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--ivory);
}

.page-about .cadence-card p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 为什么回来 ---------- */
.page-about .about-return {
  padding-top: clamp(46px, 6.5vw, 88px);
}

.page-about .about-return__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-return__copy .prose p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(244, 239, 226, 0.86);
}

.page-about .about-return__copy .prose p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-return__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-return__panel {
  padding: clamp(22px, 2.8vw, 30px);
  align-self: start;
}

.page-about .about-return__panel-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .code-list,
.page-about .state-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .code-list {
  display: grid;
  gap: 14px;
}

.page-about .code-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(201, 162, 39, 0.14);
}

.page-about .code-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .code-list__code {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ivory);
}

.page-about .code-list__desc {
  font-size: 13px;
  color: var(--mist);
}

.page-about .state-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed rgba(201, 162, 39, 0.28);
  font-size: 13.5px;
  color: var(--mist);
}

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

.page-about .state-open {
  background: var(--violet);
  box-shadow: 0 0 10px rgba(122, 92, 255, 0.6);
}

.page-about .state-full {
  background: var(--crimson);
  box-shadow: 0 0 10px rgba(200, 56, 47, 0.55);
}

.page-about .state-fix {
  background: var(--gold);
  box-shadow: 0 0 10px rgba(201, 162, 39, 0.55);
}

.page-about .about-return__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 收束行动 ---------- */
.page-about .about-cta {
  margin-top: clamp(46px, 6.5vw, 88px);
}

.page-about .about-cta__box {
  padding: clamp(28px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(110% 140% at 88% 100%, rgba(27, 76, 64, 0.8) 0%, rgba(11, 31, 26, 0) 62%),
    linear-gradient(200deg, rgba(244, 239, 226, 0.05), rgba(11, 31, 26, 0) 55%);
}

.page-about .about-cta__box h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ivory);
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    grid-template-columns: 1.06fr 0.94fr;
  }

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

  .page-about .team-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .timeline {
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 119px;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    column-gap: 40px;
  }

  .page-about .timeline__item::before {
    left: 113px;
    top: 10px;
  }

  .page-about .timeline__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .scale-strip {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    overflow: visible;
  }

  .page-about .scale-cell {
    min-width: 0;
    padding: 22px 16px 26px;
  }

  .page-about .scale-cell:first-child {
    padding-left: 0;
  }

  .page-about .scale-hint {
    display: none;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .timeline__extra {
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows var(--ease), opacity var(--ease);
  }

  .page-about .timeline__extra > p {
    overflow: hidden;
  }

  .page-about .timeline__item:hover .timeline__extra,
  .page-about .timeline__item:focus-within .timeline__extra {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team__grid {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
  }

  .page-about .about-return__grid {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__extra,
  .page-about .timeline__item .timeline__card,
  .page-about .about-jump a {
    transition: none;
  }

  .page-about .timeline__item:hover .timeline__card,
  .page-about .timeline__item:focus-within .timeline__card {
    transform: none;
  }
}