.page-about {
  --about-gap: clamp(20px, 3vw, 34px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(6px, 1.6vw, 18px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-hero__lead {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-hero__intro {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.85;
  color: var(--txt);
}

.page-about .about-hero__tags {
  margin-top: 2px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, .08);
}

.page-about .media-frame img {
  max-width: 100%;
  height: auto;
}

.page-about .media-frame__caption {
  color: var(--txt-mute);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 3.6vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: var(--c-ink-2);
}

.page-about .about-stat__num {
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}

.page-about .about-stat:nth-child(even) .about-stat__num {
  color: var(--c-gold);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--txt-mute);
}

/* ---------- 缘起 ---------- */
.page-about .about-story__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-story__body p {
  margin: 0 0 1.1em;
}

.page-about .about-story__body p:last-child {
  margin-bottom: 0;
}

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

.page-about .about-claim {
  padding: 16px 18px 18px 20px;
  background: linear-gradient(180deg, rgba(18, 61, 74, .58), rgba(42, 27, 61, .32));
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-hot);
  transition: border-color var(--t), transform var(--t), background var(--t);
}

.page-about .about-claim:hover,
.page-about .about-claim:focus-within {
  transform: translateY(-2px);
  border-left-color: var(--c-gold);
  background: linear-gradient(180deg, rgba(18, 61, 74, .72), rgba(42, 27, 61, .4));
}

.page-about .about-claim__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--c-gold);
}

.page-about .about-claim__title {
  margin: 8px 0 8px;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.5;
  color: var(--txt-strong);
}

.page-about .about-claim__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--txt-mute);
}

/* ---------- 索引方法 ---------- */
.page-about .about-index__grid {
  display: grid;
  gap: var(--about-gap);
}

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

.page-about .about-figure {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: linear-gradient(180deg, rgba(42, 27, 61, .55), rgba(11, 27, 43, .9));
}

.page-about .about-figure__num {
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1;
  color: var(--c-soft);
}

.page-about .about-figure__label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--txt-mute);
}

.page-about .about-index__body p {
  margin: 0 0 1.1em;
}

.page-about .about-index__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__figure {
  margin: 0 0 clamp(24px, 3.6vw, 40px);
  border: 1px solid var(--line);
}

.page-about .timeline-track {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 24px;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .timeline-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-gold) 65%, rgba(255, 183, 77, 0));
}

.page-about .timeline-item {
  position: relative;
  padding: 12px 14px;
  border: 1px solid transparent;
  outline: none;
  transition: border-color var(--t), background var(--t);
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 18px;
  width: 9px;
  height: 9px;
  background: var(--c-ink);
  border: 1px solid var(--c-gold);
  transition: border-color var(--t), box-shadow var(--t);
}

.page-about .timeline-item:hover,
.page-about .timeline-item:focus-visible {
  border-color: var(--line-2);
  background: rgba(18, 61, 74, .42);
}

.page-about .timeline-item:hover::before,
.page-about .timeline-item:focus-visible::before {
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, .14);
}

.page-about .timeline-version {
  margin: 0;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--c-gold);
}

.page-about .timeline-title {
  margin: 6px 0 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.5;
  color: var(--txt-strong);
}

.page-about .timeline-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--txt-mute);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--t);
}

.page-about .timeline-item:hover .timeline-text,
.page-about .timeline-item:focus-visible .timeline-text {
  display: block;
  overflow: visible;
  color: var(--txt);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
}

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

.page-about .about-team-card {
  display: grid;
  gap: 6px;
  transition: transform var(--t), box-shadow var(--t);
}

.page-about .about-team-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .38);
}

.page-about .about-team-card .plate-label {
  color: var(--c-orange);
  letter-spacing: .16em;
}

/* ---------- 生态与地区 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .partner-item {
  display: grid;
  gap: 10px;
  padding: 20px 14px;
  background: var(--c-deep);
}

.page-about .partner-item__num {
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1;
  color: var(--c-gold);
}

.page-about .partner-item__label {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--txt-mute);
}

.page-about .about-partners__note {
  padding: 22px 20px;
  border: 1px solid var(--line-gold);
  background: linear-gradient(180deg, rgba(255, 183, 77, .09), rgba(11, 27, 43, .6));
}

.page-about .about-partners__note-title {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.5;
  color: var(--c-gold);
}

.page-about .about-partners__note-text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--txt);
}

.page-about .about-partners__cta {
  text-decoration: none;
}

/* ---------- 继续走 ---------- */
.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-next__item a {
  display: grid;
  gap: 7px;
  padding: 20px 18px;
  background: var(--c-ink-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--t), background var(--t);
}

.page-about .about-next__item a:hover,
.page-about .about-next__item a:focus-visible {
  border-left-color: var(--c-cyan);
  background: rgba(18, 61, 74, .5);
  outline: none;
}

.page-about .about-next__label {
  font-size: 17px;
  font-weight: 700;
  color: var(--txt-strong);
  transition: color var(--t);
}

.page-about .about-next__item a:hover .about-next__label,
.page-about .about-next__item a:focus-visible .about-next__label {
  color: var(--c-cyan);
}

.page-about .about-next__hint {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--txt-mute);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 379px) {
  .page-about .partner-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-stat__label {
    letter-spacing: .08em;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1.18fr);
    align-items: end;
  }

  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: stretch;
  }
}

/* ---------- 时间线横铺 ---------- */
@media (min-width: 980px) {
  .page-about .timeline-track {
    padding: 42px 0 0;
    gap: 0;
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
  }

  .page-about .timeline-track::before {
    left: 0;
    right: 0;
    top: 8px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--c-cyan), var(--c-gold) 72%, rgba(255, 183, 77, 0));
  }

  .page-about .timeline-item {
    padding: 8px 18px 8px 0;
    border: 0;
    background: none;
  }

  .page-about .timeline-item::before {
    left: 0;
    top: -38px;
  }

  .page-about .timeline-item:hover,
  .page-about .timeline-item:focus-visible {
    background: none;
  }

  .page-about .timeline-item:hover .timeline-title,
  .page-about .timeline-item:focus-visible .timeline-title {
    color: var(--c-cyan);
  }

  .page-about .timeline-title {
    transition: color var(--t);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-claim,
  .page-about .about-team-card,
  .page-about .timeline-item,
  .page-about .timeline-item::before,
  .page-about .about-next__item a {
    transition: none;
  }

  .page-about .about-claim:hover,
  .page-about .about-team-card:hover {
    transform: none;
  }
}