.page-about {
  --about-rail: 148px;
  --about-max: 920px;
  --panel-accent: var(--line);
  background: var(--night);
  color: var(--paper);
}

.page-about .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--line);
  background-color: var(--night);
  background-image:
    repeating-linear-gradient(0deg, rgba(33, 69, 58, .5) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, rgba(33, 69, 58, .5) 0 1px, transparent 1px 44px),
    radial-gradient(circle at 84% 8%, rgba(191, 247, 71, .16), transparent 46%),
    linear-gradient(160deg, rgba(14, 42, 34, .94) 0%, rgba(7, 12, 11, .98) 72%);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -80px;
  width: 260px;
  height: 120px;
  background: var(--lime);
  opacity: .16;
  transform: rotate(-24deg);
  pointer-events: none;
}

.page-about .about-cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 76px;
  padding-bottom: 48px;
}

.page-about .about-cover .breadcrumbs,
.page-about .about-cover .breadcrumbs a {
  color: var(--mist);
  font-size: 12.5px;
}

.page-about .about-cover .eyebrow {
  margin: 20px 0 10px;
}

.page-about .about-cover h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 8.4vw, 3.4rem);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-cover .lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 54ch;
}

.page-about .about-cover__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .cover-stat {
  background: var(--ink);
  padding: 12px 14px 14px;
}

.page-about .cover-stat dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .cover-stat dd {
  margin: 6px 0 0;
  font-size: 22px;
  font-weight: 800;
  color: var(--lime);
  line-height: 1.1;
}

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

.page-about .about-cover__media {
  position: relative;
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: 10px 10px 0 var(--deep);
  background: var(--moss);
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-about .about-cover__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(33, 69, 58, .45) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(33, 69, 58, .45) 0 1px, transparent 1px 32px);
  pointer-events: none;
}

.page-about .about-cover__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 侧边刻度 + 正文 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 40px;
  padding-bottom: 44px;
}

.page-about .about-flow__rail {
  margin-bottom: 26px;
}

.page-about .about-flow__rail-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .year-scale {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .year-scale__item {
  display: flex;
  align-items: baseline;
  gap: 9px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  color: var(--mist);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-about .year-scale__item:hover,
.page-about .year-scale__item:focus-visible {
  color: var(--paper);
  border-left-color: var(--lime);
  background: var(--ink);
  outline: none;
}

.page-about .year-scale__num {
  font-size: 14px;
  font-weight: 700;
  color: var(--lime);
  min-width: 44px;
}

.page-about .year-scale__label {
  font-size: 13px;
  letter-spacing: .06em;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--top-h) + 22px);
  padding-bottom: 42px;
  margin-bottom: 42px;
  border-bottom: 2px solid var(--line);
}

.page-about .about-chapter:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-about .about-chapter__head {
  margin-bottom: 18px;
}

.page-about .about-chapter__head h2 {
  position: relative;
  margin: 8px 0 0;
  padding-left: 16px;
  font-size: clamp(1.4rem, 5.4vw, 2rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .about-chapter__head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .18em;
  bottom: .18em;
  width: 5px;
  background: var(--lime);
}

.page-about .about-chapter .lede {
  font-size: 15px;
  line-height: 1.8;
  color: var(--misо);
  color: var(--mist);
  margin: 0 0 6px;
}

.page-about .prose p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
}

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

.page-about .callout {
  margin: 18px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--lime);
  background: var(--ink);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 规模数字 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 24px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 14px 16px;
  background: var(--moss);
  border: 2px solid var(--line);
  border-top: 4px solid var(--lime);
}

.page-about .about-stat__num {
  font-size: clamp(1.6rem, 7vw, 2.2rem);
  font-weight: 800;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-stat__label {
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-stat__note {
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 22px 0 22px;
}

.page-about .team-panel:nth-child(1) {
  --panel-accent: var(--lime);
}

.page-about .team-panel:nth-child(2) {
  --panel-accent: var(--amber);
}

.page-about .team-panel:nth-child(3) {
  --panel-accent: var(--amber);
}

.page-about .team-panel:nth-child(4) {
  --panel-accent: var(--lime);
}

.page-about .team-panel {
  padding: 18px 16px 20px;
  background: var(--ink);
  border: 2px solid var(--line);
  border-top: 4px solid var(--panel-accent);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.page-about .team-panel:hover,
.page-about .team-panel:focus-within {
  border-color: var(--panel-accent);
  transform: translateY(-3px);
  box-shadow: 6px 6px 0 var(--deep);
}

.page-about .team-panel__count {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .team-panel__title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--paper);
}

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

.page-about .about-team__media {
  margin: 0 0 24px;
  border: 2px solid var(--line);
  box-shadow: 8px 8px 0 var(--deep);
  background: var(--moss);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-team__media figcaption {
  display: none;
}

/* ---------- 工作节奏标签页 ---------- */
.page-about .about-rhythm {
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .about-rhythm .tabs__list {
  position: relative;
  display: flex;
  overflow-x: auto;
  border-bottom: 2px solid var(--line);
  scrollbar-width: thin;
}

.page-about .about-rhythm .tabs__tab {
  flex: 0 0 auto;
  padding: 13px 16px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}

.page-about .about-rhythm .tabs__tab[aria-selected="true"] {
  background: var(--lime);
  color: var(--night);
}

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

.page-about .about-rhythm .tabs__ink {
  display: none;
}

.page-about .about-rhythm .tabs__panel {
  padding: 16px 16px 18px;
}

.page-about .about-rhythm .tabs__panel + .tabs__panel {
  border-top: 1px solid var(--line);
}

.page-about .about-rhythm .tabs__panel[hidden] {
  display: none;
}

.page-about .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .rhythm-list li {
  display: grid;
  gap: 3px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .rhythm-list__time {
  font-size: 12.5px;
  color: var(--amber);
}

/* ---------- 生产流程 ---------- */
.page-about .flow-steps {
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .flow-step {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--moss);
  border: 2px solid var(--line);
  border-top: 4px solid var(--lime);
}

.page-about .flow-step__node {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--lime);
}

.page-about .flow-step__time {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--amber);
}

.page-about .flow-step__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .flow-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-report__media {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .about-report__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .about-report__media figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 覆盖与速度 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-about .reach-figure {
  padding: 20px 18px;
  background: var(--ink);
  border: 2px solid var(--line);
  border-bottom: 4px solid var(--amber);
}

.page-about .reach-figure__num {
  margin: 0;
  font-size: clamp(2rem, 10vw, 2.8rem);
  font-weight: 800;
  line-height: 1;
  color: var(--amber);
}

.page-about .reach-figure__label {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 时间节点 ---------- */
.page-about .milestones {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .milestone {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 2px solid var(--line);
}

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

.page-about .milestone::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--night);
  transform: rotate(45deg);
}

.page-about .milestone__year {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .milestone__title {
  margin: 4px 0 6px;
  font-size: 1.03rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .milestone__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  border-top: 2px solid var(--line);
  background: linear-gradient(180deg, var(--night) 0%, var(--ink) 100%);
  padding: 46px 0 54px;
}

.page-about .about-next__title {
  margin: 8px 0 0;
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 22px;
}

.page-about .next-link {
  display: block;
  padding: 18px 16px;
  background: var(--moss);
  border: 2px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease, background-color .18s ease;
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--lime);
  background: var(--ink);
  transform: translateY(-3px);
  outline: none;
}

.page-about .next-link__title {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--lime);
}

.page-about .next-link__text {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .rhythm-list li {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

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

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

  .page-about .about-team__media {
    aspect-ratio: 3 / 1;
  }

  .page-about .about-team__media figcaption {
    display: block;
    padding: 10px 14px;
    border-top: 1px solid var(--line);
    font-size: 12.5px;
    color: var(--mist);
    background: var(--ink);
  }
}

@media (min-width: 860px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 44px;
    padding-top: 104px;
    padding-bottom: 64px;
  }

  .page-about .about-cover h1 {
    font-size: clamp(2.6rem, 5.2vw, 3.9rem);
  }

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

  .page-about .reach-grid {
    grid-template-columns: minmax(0, 250px) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .flow-step {
    border-top-width: 4px;
    border-left: 0;
    padding: 20px 16px 22px;
  }

  .page-about .flow-step + .flow-step {
    border-left: 1px dashed var(--line);
  }

  .page-about .milestones {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 34px;
    border-top: 2px solid var(--line);
  }

  .page-about .milestone {
    padding: 26px 16px 0 0;
    border-left: 0;
  }

  .page-about .milestone::before {
    top: -7px;
    left: 0;
  }

  .page-about .milestone + .milestone {
    padding-left: 16px;
    border-left: 1px dashed var(--line);
  }

  .page-about .milestone__title {
    font-size: .98rem;
  }
}

@media (min-width: 940px) {
  .page-about .about-flow {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: 44px;
    padding-top: 60px;
    padding-bottom: 60px;
  }

  .page-about .about-flow__rail {
    position: sticky;
    top: calc(var(--top-h) + 28px);
    align-self: start;
    margin-bottom: 0;
    padding-top: 4px;
  }

  .page-about .year-scale {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .year-scale__item {
    width: 100%;
  }

  .page-about .about-flow__main {
    max-width: var(--about-max);
  }
}

@media (min-width: 1040px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-panel,
  .page-about .next-link,
  .page-about .year-scale__item {
    transition: none;
  }

  .page-about .team-panel:hover,
  .page-about .team-panel:focus-within,
  .page-about .next-link:hover,
  .page-about .next-link:focus-visible {
    transform: none;
  }
}

.page-about {
  --misо: currentColor;
}