.page-about {
  --about-line-x: 12px;
  --about-node-pad: 40px;
  --about-accent: var(--gw-turf);
  padding-bottom: clamp(2.5rem, 8vw, 5rem);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 1.25rem;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gw-stone);
}
.page-about .about-crumb a {
  color: var(--gw-lake);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--gw-fast) var(--gw-ease);
}
.page-about .about-crumb a:hover {
  border-bottom-color: var(--gw-lake);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 1.25rem 0 clamp(2rem, 6vw, 3.5rem);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(72px, 20vw, 168px);
  height: 8px;
  border-radius: 0 0 0 var(--gw-r-pill);
  background: linear-gradient(90deg, var(--gw-red) 0 34%, var(--gw-whistle) 34% 100%);
}
.page-about .about-hero__kicker {
  margin: 0 0 .9rem;
  color: var(--gw-lake);
}
.page-about .about-hero__title {
  margin: 0 0 1rem;
  font-size: clamp(2.05rem, 6.2vw, 3.85rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 200;
  max-width: 16em;
  text-wrap: balance;
}
.page-about .about-hero__lede {
  max-width: var(--gw-read);
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.78;
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--gw-line-soft);
  border-radius: var(--gw-r-md);
  overflow: hidden;
}
.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.05rem 1.15rem;
  background: var(--gw-card);
}
.page-about .about-hero__num {
  font-size: clamp(1.4rem, 4.4vw, 1.85rem);
  line-height: 1;
  font-weight: 700;
  color: var(--gw-turf);
}
.page-about .about-hero__label {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gw-stone);
}

/* ---------- 时间轴骨架 ---------- */
.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(2.25rem, 6vw, 3.5rem);
  margin-top: clamp(1rem, 4vw, 2.25rem);
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: .9rem;
  bottom: 1.5rem;
  left: var(--about-line-x);
  width: 2px;
  border-radius: var(--gw-r-pill);
  background: linear-gradient(180deg, var(--gw-turf) 0%, var(--gw-whistle) 48%, var(--gw-line-soft) 100%);
}
.page-about .about-node {
  position: relative;
  padding-left: var(--about-node-pad);
}
.page-about .about-node + .about-node::before {
  content: "";
  position: absolute;
  top: -1.35rem;
  left: calc(var(--about-node-pad) + .25rem);
  right: clamp(1rem, 12vw, 6rem);
  height: 16px;
  border-top: 1px solid var(--gw-line-soft);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  pointer-events: none;
}
.page-about .about-node__dot {
  position: absolute;
  left: 5px;
  top: 1.6rem;
  width: 16px;
  height: 22px;
  border-radius: 5px;
  background: var(--gw-turf);
  box-shadow: 0 0 0 5px var(--gw-paper);
}
.page-about .about-node:nth-child(even) .about-node__dot {
  background: var(--gw-whistle);
}

/* ---------- 面板 ---------- */
.page-about .about-panel {
  background: var(--gw-card);
  border: 1px solid var(--gw-line-soft);
  border-radius: 20px;
  padding: clamp(1.2rem, 4.2vw, 2rem);
  box-shadow: 0 18px 34px -30px rgba(20, 24, 26, .75);
}
.page-about .about-panel__label {
  margin: 0 0 .8rem;
  color: var(--gw-stone);
}
.page-about .about-panel__title {
  margin: 0 0 .85rem;
  font-size: clamp(1.35rem, 3.9vw, 2.05rem);
  line-height: 1.22;
  letter-spacing: -.015em;
  font-weight: 700;
  text-wrap: balance;
}
.page-about .about-panel__lede {
  max-width: var(--gw-read);
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--gw-ink);
}
.page-about .about-panel__body p {
  max-width: var(--gw-read);
  margin: 0 0 1em;
  line-height: 1.8;
}
.page-about .about-panel__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-panel__split {
  display: grid;
  gap: 1.35rem;
}

/* ---------- 配图 ---------- */
.page-about .about-story__media,
.page-about .about-region__media,
.page-about .about-version__media {
  margin: 0;
  border-radius: var(--gw-r-md);
  overflow: hidden;
  background: var(--gw-paper);
}
.page-about .about-story__media img,
.page-about .about-region__media img,
.page-about .about-version__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-story__media img {
  aspect-ratio: 3 / 2;
}
.page-about .about-region__media img {
  aspect-ratio: 4 / 3;
}
.page-about .about-version__media {
  margin-top: 1.35rem;
}
.page-about .about-version__media img {
  aspect-ratio: 7 / 4;
}

/* ---------- 筛选胶囊 ---------- */
.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.2rem 0 1.3rem;
}
.page-about .about-chip {
  font: inherit;
  font-size: .8125rem;
  letter-spacing: .02em;
  padding: .42rem .95rem;
  border-radius: var(--gw-r-pill);
  border: 1px solid var(--gw-line);
  background: transparent;
  color: var(--gw-ink);
  cursor: pointer;
  transition: transform var(--gw-fast) var(--gw-ease),
              background-color var(--gw-fast) var(--gw-ease),
              border-color var(--gw-fast) var(--gw-ease);
}
.page-about .about-chip:hover {
  transform: translateY(-2px);
  border-color: var(--gw-ink);
}
.page-about .about-chip[data-active] {
  background: var(--gw-whistle);
  border-color: var(--gw-whistle);
  font-weight: 600;
}
.page-about .about-chip:focus-visible {
  outline: 2px solid var(--gw-lake);
  outline-offset: 2px;
}

/* ---------- 团队卡片 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}
.page-about .about-team__card {
  position: relative;
  padding: 1.05rem 1.1rem 1.15rem 1.35rem;
  border-radius: var(--gw-r-md);
  background: var(--gw-paper);
  border: 1px solid var(--gw-line-soft);
  overflow: hidden;
}
.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--team-accent, var(--gw-turf));
}
.page-about .about-team__card--editorial { --team-accent: var(--gw-turf); }
.page-about .about-team__card--review { --team-accent: var(--gw-lake); }
.page-about .about-team__card--tech { --team-accent: var(--gw-whistle); }
.page-about .about-team__card--support { --team-accent: var(--gw-stone); }

.page-about .about-team__name {
  margin: 0;
  color: var(--gw-stone);
}
.page-about .about-team__size {
  margin: .45rem 0 .55rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -.01em;
}
.page-about .about-team__size .gw-num {
  font-size: 1.5rem;
  color: var(--gw-turf);
  margin-right: .15rem;
}
.page-about .about-team__card--review .about-team__size .gw-num { color: var(--gw-lake); }
.page-about .about-team__card--tech .about-team__size .gw-num { color: var(--gw-turf-deep); }
.page-about .about-team__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
}

/* ---------- 复核流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 1.35rem 0 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}
.page-about .about-step {
  position: relative;
  padding: 1.05rem 1.1rem 1.15rem;
  border-radius: var(--gw-r-md);
  background: var(--gw-paper);
  border: 1px solid var(--gw-line-soft);
}
.page-about .about-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--gw-panel);
  color: var(--gw-whistle);
  font-family: var(--gw-mono);
  font-size: 13px;
  letter-spacing: .04em;
  margin-bottom: .65rem;
}
.page-about .about-step__title {
  margin: 0 0 .45rem;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .about-step p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
}
.page-about .about-step:nth-child(3) .about-step__num {
  background: var(--gw-red);
  color: var(--gw-card);
}

/* ---------- 版本卡片 ---------- */
.page-about .about-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}
.page-about .about-version {
  position: relative;
  padding: 1.1rem 1.15rem 1.25rem;
  border-radius: var(--gw-r-md);
  background: var(--gw-paper);
  border: 1px solid var(--gw-line-soft);
  transition: transform var(--gw-fast) var(--gw-ease),
              border-color var(--gw-fast) var(--gw-ease);
}
.page-about .about-version:hover {
  transform: translateY(-2px);
  border-color: var(--gw-line);
}
.page-about .about-version__tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 .62rem;
  margin-bottom: .7rem;
  border-radius: 6px;
  font-family: var(--gw-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gw-card);
  background: var(--gw-stone);
}
.page-about .about-version--v2 .about-version__tag { background: var(--gw-lake); }
.page-about .about-version--v3 .about-version__tag { background: var(--gw-turf); }
.page-about .about-version__title {
  margin: 0 0 .5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .about-version p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-stats {
  display: grid;
  gap: .8rem;
  margin-top: 1.3rem;
}
.page-about .about-stat {
  padding: 1.05rem 1.15rem 1.15rem;
  border-radius: var(--gw-r-md);
  background: var(--gw-paper);
  border: 1px solid var(--gw-line-soft);
  border-left: 4px solid var(--stat-accent, var(--gw-turf));
}
.page-about .about-stat:nth-child(1) { --stat-accent: var(--gw-turf); }
.page-about .about-stat:nth-child(2) { --stat-accent: var(--gw-whistle); }
.page-about .about-stat:nth-child(3) { --stat-accent: var(--gw-lake); }
.page-about .about-stat:nth-child(4) { --stat-accent: var(--gw-red); }
.page-about .about-stat__num {
  display: block;
  font-family: var(--gw-mono);
  font-size: clamp(1.7rem, 5.2vw, 2.3rem);
  line-height: 1;
  font-weight: 700;
  color: var(--gw-ink);
}
.page-about .about-stat__label {
  display: block;
  margin: .5rem 0 .55rem;
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--gw-stone);
}
.page-about .about-stat p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
}

/* ---------- 备案信息 ---------- */
.page-about .about-registry {
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--gw-line-soft);
}
.page-about .about-registry__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .9rem;
  padding: .7rem 0;
  border-bottom: 1px solid var(--gw-line-soft);
}
.page-about .about-registry dt {
  flex: 0 0 auto;
  min-width: 6.5em;
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--gw-stone);
}
.page-about .about-registry dd {
  margin: 0;
  font-family: var(--gw-mono);
  font-size: .95rem;
  letter-spacing: .01em;
  color: var(--gw-ink);
}

/* ---------- 收束面板 ---------- */
.page-about .about-outro {
  position: relative;
  margin-top: clamp(2.5rem, 8vw, 4.5rem);
  padding: clamp(1.5rem, 5vw, 2.75rem);
  border-radius: var(--gw-r-lg);
  overflow: hidden;
}
.page-about .about-outro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 6px;
  border-radius: 0 0 var(--gw-r-pill) 0;
  background: linear-gradient(90deg, var(--gw-whistle) 0 60%, var(--gw-red) 60% 100%);
}
.page-about .about-outro__kicker {
  margin: 0 0 .8rem;
  color: var(--gw-whistle);
}
.page-about .about-outro__title {
  margin: 0 0 .9rem;
  font-size: clamp(1.4rem, 4.4vw, 2.15rem);
  line-height: 1.22;
  letter-spacing: -.015em;
  font-weight: 700;
  color: var(--gw-card);
}
.page-about .about-outro__text {
  max-width: var(--gw-read);
  margin: 0 0 1.5rem;
  font-size: .9688rem;
  line-height: 1.78;
  color: var(--gw-on-dark);
}
.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-line-x: 27px;
    --about-node-pad: 76px;
  }
  .page-about .about-timeline::before {
    top: 1.4rem;
    bottom: 3rem;
  }
  .page-about .about-node__dot {
    left: 19px;
    top: 2rem;
    width: 18px;
    height: 26px;
  }
  .page-about .about-node + .about-node::before {
    top: -1.75rem;
  }
  .page-about .about-panel {
    border-radius: var(--gw-r-lg);
  }
  .page-about .about-panel__split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2.25rem;
    align-items: start;
  }
  .page-about .about-panel__split--reverse {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }
  .page-about .about-story__media {
    position: sticky;
    top: 2rem;
  }
  .page-about .about-versions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    padding-left: 16px;
  }
  .page-about .about-version {
    margin-left: -16px;
    box-shadow: -12px 0 26px -22px rgba(20, 24, 26, .9);
  }
  .page-about .about-version:hover {
    z-index: 2;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-registry__row {
    gap: 1.5rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero {
    padding-top: 2rem;
  }
  .page-about .about-panel__body p {
    font-size: 1.0313rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chip,
  .page-about .about-version {
    transition: opacity var(--gw-fast) linear;
  }
  .page-about .about-chip:hover,
  .page-about .about-version:hover {
    transform: none;
  }
}
</main>