.page-about {
  --ab-pad: clamp(22px, 4vw, 46px);
  --ab-gap: clamp(28px, 4.5vw, 64px);
  font-family: var(--wb-font);
  color: var(--wb-black);
}

.page-about .wb-crumb {
  margin-bottom: var(--ab-pad);
}

/* ---------- 首屏：左叙事 + 右抽象视觉 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
  align-items: start;
  padding-bottom: var(--ab-gap);
  border-bottom: 1px solid var(--wb-edge);
}

.page-about .about-hero__text h1 {
  margin: 10px 0 18px;
  font-size: clamp(2.05rem, 6.4vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--wb-ink);
}

.page-about .about-hero__text .wb-lead {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: 1.06rem;
  line-height: 1.85;
  color: var(--wb-stone);
}

.page-about .about-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--wb-edge);
}

.page-about .about-quick {
  flex: 1 1 130px;
  padding: 14px 16px 14px 0;
  border-right: 1px solid var(--wb-edge);
}

.page-about .about-quick:last-child {
  border-right: 0;
}

.page-about .about-quick__n {
  display: block;
  font-family: var(--wb-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--wb-clay);
}

.page-about .about-quick__t {
  display: block;
  margin-top: 4px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--wb-stone);
}

.page-about .about-hero__aside {
  margin: 0;
  max-width: 44ch;
  padding-left: 14px;
  border-left: 2px solid var(--wb-amber);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--wb-stone);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--wb-edge);
  background: var(--wb-layer);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-hero__media .wb-media__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--wb-edge);
  background: var(--wb-surface);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--wb-stone);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding-top: var(--ab-gap);
}

.page-about .about-body__main {
  min-width: 0;
}

.page-about .about-note {
  align-self: start;
}

.page-about .about-note .wb-note__list li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 9px 0;
  border-bottom: 1px solid var(--wb-edge);
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--wb-stone);
}

.page-about .about-note .wb-note__list li:last-child {
  border-bottom: 0;
}

/* ---------- 通用栏目块 ---------- */
.page-about .about-section {
  padding-bottom: var(--ab-gap);
  margin-bottom: var(--ab-gap);
  border-bottom: 1px solid var(--wb-edge);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-about .about-section__head {
  max-width: 60ch;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-section__head h2 {
  margin: 8px 0 14px;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.28;
  font-weight: 800;
  color: var(--wb-ink);
}

.page-about .about-section__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--wb-stone);
}

.page-about .about-note-line {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--wb-stone);
}

/* ---------- 团队：叠层纸卡 ---------- */
.page-about .about-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-about .about-card {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--wb-surface);
  border: 1px solid var(--wb-edge);
  border-radius: var(--wb-radius);
  box-shadow: 5px 5px 0 var(--wb-layer);
  transition: transform 180ms var(--wb-ease), border-color 180ms var(--wb-ease), box-shadow 180ms var(--wb-ease);
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--wb-cyan);
  box-shadow: 5px 5px 0 var(--wb-layer), 0 0 0 1px var(--wb-cyan);
}

.page-about .about-card .wb-card__num {
  margin: 0 0 10px;
  font-family: var(--wb-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--wb-clay);
}

.page-about .about-card .wb-card__title {
  margin: 0 0 10px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--wb-ink);
}

.page-about .about-card p {
  margin: 0 0 12px;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--wb-stone);
}

.page-about .about-card .about-card__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--wb-edge);
  font-size: 0.8rem;
  color: var(--wb-clay);
}

/* ---------- 分工清单 ---------- */
.page-about .about-table {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--wb-ink);
}

.page-about .about-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 13px 8px 13px 0;
  border-bottom: 1px solid var(--wb-edge);
  transition: border-color 160ms var(--wb-ease);
}

.page-about .about-row:hover {
  border-left: 3px solid var(--wb-clay);
  padding-left: 10px;
}

.page-about .about-row__k {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--wb-black);
}

.page-about .about-row__v {
  font-size: 0.95rem;
  text-align: right;
  color: var(--wb-stone);
}

.page-about .about-row--total {
  border-bottom-color: var(--wb-ink);
}

.page-about .about-row--total .about-row__k,
.page-about .about-row--total .about-row__v {
  font-weight: 700;
  color: var(--wb-ink);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-media {
  margin: 0 0 clamp(24px, 3vw, 38px);
  border: 1px solid var(--wb-edge);
  background: var(--wb-layer);
}

.page-about .about-timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--wb-edge);
}

.page-about .about-tl {
  position: relative;
  padding-bottom: 18px;
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--wb-clay);
  box-shadow: 0 0 0 3px var(--wb-paper);
}

.page-about .about-tl__year {
  margin: 0 0 8px;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--wb-stone);
}

.page-about .about-tl__box {
  border: 1px solid var(--wb-edge);
  background: var(--wb-surface);
  border-radius: var(--wb-radius);
  transition: border-color 180ms var(--wb-ease), background 180ms var(--wb-ease);
}

.page-about .about-tl__box:hover {
  border-color: var(--wb-clay);
}

.page-about .about-tl__box summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-tl__box summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__box summary h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--wb-ink);
  flex: 1 1 60%;
}

.page-about .about-tl__hint {
  font-size: 0.78rem;
  color: var(--wb-cyan);
  border-bottom: 1px dashed var(--wb-cyan);
}

.page-about .about-tl__box[open] {
  border-color: var(--wb-cyan);
}

.page-about .about-tl__box p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--wb-stone);
}

/* ---------- 覆盖：深色整宽块 ---------- */
.page-about .about-coverage {
  padding: clamp(28px, 4vw, 52px) clamp(20px, 3.4vw, 44px);
  margin-bottom: var(--ab-gap);
  background: var(--wb-ink);
  color: var(--wb-paper);
  border-radius: var(--wb-radius);
}

.page-about .about-coverage__head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-coverage__head .wb-eyebrow--light {
  color: var(--wb-cyan);
}

.page-about .about-coverage__head h2 {
  margin: 8px 0 14px;
  font-size: clamp(1.45rem, 3.4vw, 2.15rem);
  line-height: 1.3;
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-coverage__head p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(246, 242, 233, 0.76);
}

.page-about .about-coverage__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .about-coverage__media {
  margin: 0;
  border: 1px solid var(--wb-edge-dark);
  background: var(--wb-ink-2);
}

.page-about .about-coverage__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--wb-edge-dark);
  border: 1px solid var(--wb-edge-dark);
}

.page-about .about-stat {
  padding: 16px 14px;
  background: var(--wb-ink-2);
}

.page-about .about-stat dt {
  font-size: 0.78rem;
  line-height: 1.5;
  color: rgba(246, 242, 233, 0.66);
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: var(--wb-paper);
}

.page-about .about-stat__n {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--wb-amber);
  margin-right: 6px;
}

.page-about .about-coverage__foot {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--wb-edge-dark);
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(246, 242, 233, 0.74);
}

/* ---------- 协作 ---------- */
.page-about .about-partners {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--wb-ink);
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--wb-edge);
}

.page-about .about-partners__n {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--wb-moss);
}

.page-about .about-partners__item h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--wb-ink);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--wb-stone);
}

/* ---------- 合作流程 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--wb-edge);
  border: 1px solid var(--wb-edge);
}

.page-about .about-step {
  padding: 20px 18px;
  background: var(--wb-surface);
  transition: background 180ms var(--wb-ease);
}

.page-about .about-step:hover {
  background: var(--wb-layer);
}

.page-about .about-step__n {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--wb-clay);
}

.page-about .about-step h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--wb-ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--wb-stone);
}

.page-about .about-cta {
  margin-top: clamp(22px, 3vw, 32px);
  padding: 18px 20px;
  border-left: 3px solid var(--wb-amber);
  background: var(--wb-layer);
  border-radius: var(--wb-radius);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--wb-black);
}

.page-about a.wb-link {
  color: var(--wb-clay);
}

/* ---------- 键盘焦点 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--wb-cyan);
  outline-offset: 2px;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 700px) {
  .page-about .about-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .about-hero__media {
    position: sticky;
    top: calc(var(--wb-top-h) + 24px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 262px;
    gap: clamp(30px, 4vw, 64px);
  }

  .page-about .about-note {
    position: sticky;
    top: calc(var(--wb-top-h) + 24px);
  }

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

  .page-about .about-coverage__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-row,
  .page-about .about-tl__box,
  .page-about .about-step {
    transition: none;
  }

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