.page-about {
  --about-year-col: 84px;
  --about-fill-a: 41%;
  --about-fill-b: 35%;
  --about-fill-c: 15%;
  --about-fill-d: 9%;
  color: var(--c-text);
  background: var(--c-base);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 48px;
  background:
    radial-gradient(760px 380px at 92% -14%, rgba(217, 249, 74, 0.09), transparent 62%),
    radial-gradient(520px 320px at 4% 8%, rgba(255, 138, 43, 0.07), transparent 66%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-4);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 var(--s-2);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-mist);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 var(--s-3);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7.2vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-about .about-hero__accent {
  color: var(--c-neon);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 0 0 var(--s-4);
}

.page-about .about-hero__actions {
  flex-wrap: wrap;
  gap: var(--s-2);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: var(--c-panel);
}

.page-about .about-fact__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__label {
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

/* ---------- Hero media ---------- */
.page-about .about-hero-media {
  margin: 0;
  position: relative;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--r-card);
  border: 1px solid var(--c-line);
  filter: saturate(0.86) contrast(1.06);
}

.page-about .about-hero-media .media__caption {
  margin-top: 10px;
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: 72px 0;
}

.page-about .section__head {
  margin-bottom: var(--s-5);
}

/* ---------- 年份档案轴 ---------- */
.page-about .about-archive__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-archive__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: var(--c-line);
}

.page-about .about-stage {
  position: relative;
  padding-left: 34px;
  padding-bottom: var(--s-5);
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-stage--current::before {
  background: var(--c-neon);
  border-color: var(--c-neon);
  box-shadow: 0 0 0 4px rgba(217, 249, 74, 0.18);
}

.page-about .about-stage__year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-mist);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stage--current .about-stage__year {
  color: var(--c-neon);
}

.page-about .about-stage__card {
  padding: 22px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-panel);
}

.page-about .about-stage__no {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-whistle);
}

.page-about .about-stage__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.2vw, 26px);
  line-height: 1.25;
  color: var(--c-text);
}

.page-about .about-stage__text {
  margin: 0 0 var(--s-3);
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-text);
}

.page-about .about-stage__points {
  margin: 0;
  padding-left: 18px;
  list-style: disc;
}

.page-about .about-stage__points li {
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-brown);
}

.page-about .about-stage__points li:last-child {
  margin-bottom: 0;
}

/* ---------- 展开条 ---------- */
.page-about .expand__head {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--c-whistle);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .expand__head::after {
  content: "+";
  font-size: 15px;
  line-height: 1;
}

.page-about .expand__head[aria-expanded="true"]::after {
  content: "−";
}

.page-about .expand__head:hover,
.page-about .expand__head:focus-visible {
  border-color: var(--c-whistle);
  background: rgba(255, 138, 43, 0.1);
}

.page-about .expand__body {
  margin-top: var(--s-3);
}

.page-about .expand__panel {
  padding: 18px;
  border-radius: var(--r-sm);
  background: var(--c-cream);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

.page-about .about-bars {
  display: grid;
  gap: var(--s-4);
}

.page-about .about-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-2);
  margin-bottom: 10px;
}

.page-about .about-bar__name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-text);
}

.page-about .about-bar__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1;
  color: var(--c-neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-bar__track {
  position: relative;
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  transition: filter 160ms var(--ease);
}

.page-about .about-bar__fill--a { width: var(--about-fill-a); background: var(--c-neon); }
.page-about .about-bar__fill--b { width: var(--about-fill-b); background: var(--c-whistle); }
.page-about .about-bar__fill--c { width: var(--about-fill-c); background: var(--c-amber); }
.page-about .about-bar__fill--d { width: var(--about-fill-d); background: var(--c-mist); }

.page-about .about-bar:hover .about-bar__fill {
  filter: brightness(1.15);
}

.page-about .about-bar__duty {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--c-mist);
  max-width: 52ch;
}

.page-about .about-team__aside {
  padding: 24px 22px;
  border-radius: var(--r-card);
}

.page-about .about-team__aside-no {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-cream-dim);
  text-transform: uppercase;
}

.page-about .about-team__aside-text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-brown);
}

.page-about .about-team__aside-text:last-child {
  margin-bottom: 0;
}

/* ---------- 复核流程 ---------- */
.page-about .about-review__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

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

.page-about .about-review__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-card);
  border: 1px solid var(--c-line);
  filter: saturate(0.8) contrast(1.08);
}

.page-about .about-review__media .media__caption {
  margin-top: 10px;
}

.page-about .about-review__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-step {
  position: relative;
  padding: 20px 20px 20px 20px;
  background: var(--c-panel);
}

.page-about .about-step__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  color: var(--c-neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-text);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-mist);
}

/* ---------- 栏目体系 ---------- */
.page-about .about-columns__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

.page-about .about-columns__lead {
  margin: 0 0 var(--s-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.2vw, 27px);
  line-height: 1.5;
  color: var(--c-text);
}

.page-about .about-columns__text {
  margin: 0 0 var(--s-4);
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-text);
}

.page-about .about-columns__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0 0 var(--s-4);
  padding: 0;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-columns__stat {
  padding: 16px 18px;
  background: var(--c-panel);
}

.page-about .about-columns__stat dt {
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.2;
  color: var(--c-neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-columns__stat dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-mist);
}

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

.page-about .about-columns__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--r-card);
  border: 1px solid var(--c-line);
  filter: saturate(0.82) contrast(1.05);
}

.page-about .about-columns__media .media__caption {
  margin-top: 10px;
}

/* ---------- 备案与服务范围 ---------- */
.page-about .about-place__panel {
  padding: 28px 22px;
  border-radius: var(--r-card);
  background-image:
    repeating-linear-gradient(135deg, rgba(36, 28, 20, 0.05) 0 1px, transparent 1px 9px);
}

.page-about .about-place__head {
  margin-bottom: var(--s-4);
}

.page-about .about-place__head .section__title {
  color: var(--c-brown);
  margin-top: 10px;
}

.page-about .about-place__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
}

.page-about .about-place__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.95;
  color: var(--c-brown);
  padding-left: 14px;
  border-left: 2px solid var(--c-whistle);
}

/* ---------- 回访节奏 ---------- */
.page-about .about-return__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0 0 var(--s-4);
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-return__item {
  padding: 22px 20px;
  background: var(--c-panel);
}

.page-about .about-return__phase {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 14px;
  border-radius: var(--r-pill);
  background: rgba(217, 249, 74, 0.14);
  color: var(--c-neon);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.page-about .about-return__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-text);
}

.page-about .about-return__note {
  margin: 0;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: var(--c-panel);
  border: 1px dashed var(--c-line);
  font-size: 13px;
  line-height: 1.9;
  color: var(--c-mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 72px 0 96px;
}

.page-about .about-cta__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  padding: 30px 24px;
  border-radius: var(--r-card);
  background:
    linear-gradient(160deg, rgba(217, 249, 74, 0.09), transparent 58%),
    var(--c-panel);
  border: 1px solid var(--c-line);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.15;
  color: var(--c-text);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-mist);
  max-width: 62ch;
}

.page-about .about-cta__actions {
  flex-wrap: wrap;
  gap: var(--s-2);
  align-self: end;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-columns__stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-team__layout {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: var(--s-5);
  }

  .page-about .about-review__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: var(--s-5);
  }

  .page-about .about-review__media {
    position: sticky;
    top: 128px;
  }

  .page-about .about-columns__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: var(--s-5);
  }

  .page-about .about-columns__media {
    order: 2;
  }

  .page-about .about-place__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--s-4);
  }

  .page-about .about-cta__panel {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    padding: 40px 36px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-stage {
    padding-left: 44px;
  }

  .page-about .about-stage__card {
    padding: 26px 28px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 40px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: var(--s-6);
  }

  .page-about .about-place__panel {
    padding: 44px 40px;
  }

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

@media (max-width: 479px) {
  .page-about .section {
    padding: 56px 0;
  }

  .page-about .about-hero__facts {
    grid-template-columns: 1fr;
  }

  .page-about .about-stage {
    padding-left: 28px;
  }

  .page-about .about-stage__card,
  .page-about .about-step,
  .page-about .about-return__item {
    padding: 18px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-bar__fill,
  .page-about .about-stage::before,
  .page-about .expand__head {
    transition: none;
  }
}